Speciation and fate of ethylenediaminetetraacetate (EDTA) in municipal wastewater treatment
Identifieur interne : 001998 ( Istex/Corpus ); précédent : 001997; suivant : 001999Speciation and fate of ethylenediaminetetraacetate (EDTA) in municipal wastewater treatment
Auteurs : Franz Guenter Kari ; Walter GigerSource :
- Water Research [ 0043-1354 ] ; 1995.
Abstract
The speciation of EDTA in sewage effluents leaving wastewater treatment plants determines its ultimate fate in natural surface waters, since only the Fe(III)-EDTA complex (FeEDTA) is quickly degraded by direct photolysis, whereas other EDTA species are very slowly transformed, if at all, by biological or chemical processes. Field studies were undertaken to quantify the speciation of EDTA in influents and effluents of sewage treatment plants. Chemical equilibrium calculations are of only limited use for this purpose because several weeks are needed to reach thermodynamic equilibrium in wastewater due to slow metal exchange processes. In the effluents from treatment plants that precipitate phosphate, concentrations of dissolved Fe (0.05 μm- and 0.45 μm-filterable) correlated with the concentrations of EDTA. An operational scheme, using sunlight or artificial light sources for specific photoconversion of FeEDTA species, was applied to distinguish between photo-degradable (=FeEDTA) and photo-resistent EDTA species. Field studies conducted at three municipal wastewater treatment facilities showed that EDTA speciation changes from the input to the output because FeEDTA is formed from other metal-EDTA complexes after addition of iron(II)-containing solutions into the aeration tanks. With respect to total amounts of EDTA, fractions of FeEDTA in the influents and effluents varied from 10 to 55% and from 20 to 90%. Mass balances comprising sampling periods of several days showed that no significant elimination of EDTA occured by biological or chemical processes during sewage treatment, whereas the chemically related phosphate substitute nitrilotriacetic acid (NTA) was efficiently degraded (>90%). As long as the speciation of EDTA in wastewaters is dominated by FeEDTA, and aerobic conditions are maintained, the remobilization of common heavy metals out of sewage sludge is unlikely to occur.
Url:
DOI: 10.1016/0043-1354(95)00125-5
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<record><TEI wicri:istexFullTextTei="biblStruct"><teiHeader><fileDesc><titleStmt><title>Speciation and fate of ethylenediaminetetraacetate (EDTA) in municipal wastewater treatment</title><author><name sortKey="Kari, Franz Guenter" sort="Kari, Franz Guenter" uniqKey="Kari F" first="Franz Guenter" last="Kari">Franz Guenter Kari</name><affiliation><mods:affiliation>Swiss Federal Institute for Environmental Science and Technology (EAWAG), CH-8600 Dübendorf, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Giger, Walter" sort="Giger, Walter" uniqKey="Giger W" first="Walter" last="Giger">Walter Giger</name><affiliation><mods:affiliation>Swiss Federal Institute for Environmental Science and Technology (EAWAG), CH-8600 Dübendorf, Switzerland</mods:affiliation></affiliation></author></titleStmt><publicationStmt><idno type="wicri:source">ISTEX</idno><idno type="RBID">ISTEX:B65A0D6D68D531E3522067D4B2336A55D557CEA1</idno><date when="1995" year="1995">1995</date><idno type="doi">10.1016/0043-1354(95)00125-5</idno><idno type="url">https://api.istex.fr/document/B65A0D6D68D531E3522067D4B2336A55D557CEA1/fulltext/pdf</idno><idno type="wicri:Area/Istex/Corpus">001998</idno><idno type="wicri:explorRef" wicri:stream="Istex" wicri:step="Corpus" wicri:corpus="ISTEX">001998</idno></publicationStmt><sourceDesc><biblStruct><analytic><title level="a">Speciation and fate of ethylenediaminetetraacetate (EDTA) in municipal wastewater treatment</title><author><name sortKey="Kari, Franz Guenter" sort="Kari, Franz Guenter" uniqKey="Kari F" first="Franz Guenter" last="Kari">Franz Guenter Kari</name><affiliation><mods:affiliation>Swiss Federal Institute for Environmental Science and Technology (EAWAG), CH-8600 Dübendorf, Switzerland</mods:affiliation></affiliation></author><author><name sortKey="Giger, Walter" sort="Giger, Walter" uniqKey="Giger W" first="Walter" last="Giger">Walter Giger</name><affiliation><mods:affiliation>Swiss Federal Institute for Environmental Science and Technology (EAWAG), CH-8600 Dübendorf, Switzerland</mods:affiliation></affiliation></author></analytic><monogr></monogr><series><title level="j">Water Research</title><title level="j" type="abbrev">WR</title><idno type="ISSN">0043-1354</idno><imprint><publisher>ELSEVIER</publisher><date type="published" when="1995">1995</date><biblScope unit="volume">30</biblScope><biblScope unit="issue">1</biblScope><biblScope unit="page" from="122">122</biblScope><biblScope unit="page" to="134">134</biblScope></imprint><idno type="ISSN">0043-1354</idno></series><idno type="istex">B65A0D6D68D531E3522067D4B2336A55D557CEA1</idno><idno type="DOI">10.1016/0043-1354(95)00125-5</idno><idno type="PII">0043-1354(95)00125-5</idno></biblStruct></sourceDesc><seriesStmt><idno type="ISSN">0043-1354</idno></seriesStmt></fileDesc><profileDesc><textClass></textClass><langUsage><language ident="en">en</language></langUsage></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The speciation of EDTA in sewage effluents leaving wastewater treatment plants determines its ultimate fate in natural surface waters, since only the Fe(III)-EDTA complex (FeEDTA) is quickly degraded by direct photolysis, whereas other EDTA species are very slowly transformed, if at all, by biological or chemical processes. Field studies were undertaken to quantify the speciation of EDTA in influents and effluents of sewage treatment plants. Chemical equilibrium calculations are of only limited use for this purpose because several weeks are needed to reach thermodynamic equilibrium in wastewater due to slow metal exchange processes. In the effluents from treatment plants that precipitate phosphate, concentrations of dissolved Fe (0.05 μm- and 0.45 μm-filterable) correlated with the concentrations of EDTA. An operational scheme, using sunlight or artificial light sources for specific photoconversion of FeEDTA species, was applied to distinguish between photo-degradable (=FeEDTA) and photo-resistent EDTA species. Field studies conducted at three municipal wastewater treatment facilities showed that EDTA speciation changes from the input to the output because FeEDTA is formed from other metal-EDTA complexes after addition of iron(II)-containing solutions into the aeration tanks. With respect to total amounts of EDTA, fractions of FeEDTA in the influents and effluents varied from 10 to 55% and from 20 to 90%. Mass balances comprising sampling periods of several days showed that no significant elimination of EDTA occured by biological or chemical processes during sewage treatment, whereas the chemically related phosphate substitute nitrilotriacetic acid (NTA) was efficiently degraded (>90%). As long as the speciation of EDTA in wastewaters is dominated by FeEDTA, and aerobic conditions are maintained, the remobilization of common heavy metals out of sewage sludge is unlikely to occur.</div></front></TEI><istex><corpusName>elsevier</corpusName><author><json:item><name>Franz Guenter Kari</name><affiliations><json:string>Swiss Federal Institute for Environmental Science and Technology (EAWAG), CH-8600 Dübendorf, Switzerland</json:string></affiliations></json:item><json:item><name>Walter Giger</name><affiliations><json:string>Swiss Federal Institute for Environmental Science and Technology (EAWAG), CH-8600 Dübendorf, Switzerland</json:string></affiliations></json:item></author><subject><json:item><lang><json:string>eng</json:string></lang><value>ethylenediaminetetraacetate acid (EDTA)</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>speciation</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>sewage treatment</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>photodegradable species</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>heavy metal remobilization</value></json:item><json:item><lang><json:string>eng</json:string></lang><value>nitrilotriacetate (NTA)</value></json:item></subject><language><json:string>eng</json:string></language><originalGenre><json:string>Full-length article</json:string></originalGenre><abstract>The speciation of EDTA in sewage effluents leaving wastewater treatment plants determines its ultimate fate in natural surface waters, since only the Fe(III)-EDTA complex (FeEDTA) is quickly degraded by direct photolysis, whereas other EDTA species are very slowly transformed, if at all, by biological or chemical processes. Field studies were undertaken to quantify the speciation of EDTA in influents and effluents of sewage treatment plants. Chemical equilibrium calculations are of only limited use for this purpose because several weeks are needed to reach thermodynamic equilibrium in wastewater due to slow metal exchange processes. In the effluents from treatment plants that precipitate phosphate, concentrations of dissolved Fe (0.05 μm- and 0.45 μm-filterable) correlated with the concentrations of EDTA. An operational scheme, using sunlight or artificial light sources for specific photoconversion of FeEDTA species, was applied to distinguish between photo-degradable (=FeEDTA) and photo-resistent EDTA species. Field studies conducted at three municipal wastewater treatment facilities showed that EDTA speciation changes from the input to the output because FeEDTA is formed from other metal-EDTA complexes after addition of iron(II)-containing solutions into the aeration tanks. With respect to total amounts of EDTA, fractions of FeEDTA in the influents and effluents varied from 10 to 55% and from 20 to 90%. Mass balances comprising sampling periods of several days showed that no significant elimination of EDTA occured by biological or chemical processes during sewage treatment, whereas the chemically related phosphate substitute nitrilotriacetic acid (NTA) was efficiently degraded (>90%). As long as the speciation of EDTA in wastewaters is dominated by FeEDTA, and aerobic conditions are maintained, the remobilization of common heavy metals out of sewage sludge is unlikely to occur.</abstract><qualityIndicators><score>8</score><pdfVersion>1.2</pdfVersion><pdfPageSize>540 x 756 pts</pdfPageSize><refBibsNative>true</refBibsNative><keywordCount>6</keywordCount><abstractCharCount>1912</abstractCharCount><pdfWordCount>8640</pdfWordCount><pdfCharCount>51358</pdfCharCount><pdfPageCount>13</pdfPageCount><abstractWordCount>274</abstractWordCount></qualityIndicators><title>Speciation and fate of ethylenediaminetetraacetate (EDTA) in municipal wastewater treatment</title><pii><json:string>0043-1354(95)00125-5</json:string></pii><refBibs><json:item><author><json:item><name> AIS</name></json:item></author><host><author></author><title>Report of AIS Environmental Safety Working Group</title></host><title>An assessment of the implications of the use of EDTA in detergent products</title></json:item><json:item><author><json:item><name>A.C. Alder</name></json:item><json:item><name>H. Siegrist</name></json:item><json:item><name>W. Gujer</name></json:item><json:item><name>W. Giger</name></json:item></author><host><volume>24</volume><pages><last>742</last><first>733</first></pages><author></author><title>Wat. Res.</title></host><title>Behaviour of NTA and EDTA in biological wastewater treatment</title></json:item><json:item><author><json:item><name>J. Barica</name></json:item><json:item><name>M.P. Stainton</name></json:item><json:item><name>A.L. Hamilton</name></json:item></author><host><volume>7</volume><pages><last>1804</last><first>1791</first></pages><author></author><title>Wat. Res.</title></host><title>Mobilization of some metals in water and animal tissue by NTA, EDTA and TPP</title></json:item><json:item><author><json:item><name>R.T. Belly</name></json:item><json:item><name>J.J. Lauff</name></json:item><json:item><name>C.T. Goodhue</name></json:item></author><host><volume>29</volume><pages><last>794</last><first>787</first></pages><author></author><title>Appl. Microbiol.</title></host><title>Degradation of ethylenediaminetetraacetic acid by microbial populations from an aerated lagoon</title></json:item><json:item><author><json:item><name>F. Frimmel</name></json:item></author><host><volume>9</volume><pages><last>176</last><first>170</first></pages><author></author><title>Z. Wasser Abwasser Forsch.</title></host><title>Remobilization of mercury; experimental models and their relation to natural conditions</title></json:item><json:item><author><json:item><name>J. Gardiner</name></json:item></author><host><volume>10</volume><pages><last>514</last><first>507</first></pages><author></author><title>Wat. Res.</title></host><title>Complexation of trace metals by ethylenediaminetetraacetic acid (EDTA) in natural waters</title></json:item><json:item><author><json:item><name>P. Gerike</name></json:item><json:item><name>W.K. Fischer</name></json:item></author><host><volume>3</volume><pages><last>173</last><first>159</first></pages><author></author><title>Ecotoxic. Envir. Safety</title></host><title>A correlation study of biodegradability determinations with various chemicals in various tests</title></json:item><json:item><author><json:item><name>W. Giger</name></json:item></author><host><volume>3</volume><pages><last>36</last><first>33</first></pages><author></author><title>Wat. Pollut. Res. Rep.</title></host><title>Behavior of organic micropollutants during infiltration of river water into groundwater: field studies</title></json:item><json:item><author><json:item><name>W. Giger</name></json:item><json:item><name>C. Schaffner</name></json:item><json:item><name>F.G. Kari</name></json:item><json:item><name>H. Ponusz</name></json:item><json:item><name>P. Reichert</name></json:item><json:item><name>O. Wanner</name></json:item></author><host><volume>32D</volume><pages><last>31</last><first>27</first></pages><author></author><title>Mitteilungen der EAW AG</title></host><title>Occurrence and behaviour of NTA and EDTA in Swiss rivers</title></json:item><json:item><author><json:item><name>N. Gschwind</name></json:item></author><host><volume>133</volume><pages><last>549</last><first>546</first></pages><author></author><title>GWF Wasser Abwasser</title></host><title>Biological degradation of EDTA in a model wastewater</title></json:item><json:item><author><json:item><name>J.G. Hering</name></json:item><json:item><name>F.M.M. Morel</name></json:item></author><host><volume>22</volume><pages><last>1478</last><first>1469</first></pages><author></author><title>Envir. Sci. Technol.</title></host><title>Kinetics of trace metal complexation: role of alkaline-earth metals</title></json:item><json:item><host><author></author><title>Diploma thesis</title></host></json:item><json:item><host><author></author><title>Ph.D. thesis No. 10698</title></host></json:item><json:item><author><json:item><name>F.G. Kari</name></json:item><json:item><name>W. Giger</name></json:item></author><host><volume>29</volume><author></author><title>Environ. Sci. Technol.</title></host><title>Modeling the photochemical degradation of Ethylenediaminetetraacetate (EDTA) in the River Glatt</title></json:item><json:item><author><json:item><name>F.G. Kari</name></json:item><json:item><name>S.U. Hilger</name></json:item><json:item><name>S. Canonica</name></json:item></author><host><volume>29</volume><pages><last>1017</last><first>1008</first></pages><author></author><title>Envir. Sci. Technol.</title></host><title>Determination of the reaction quantum yield for the photochemical degradation of Fe(III)EDTA—implications for the environmental fate of EDTA in surface waters</title></json:item><json:item><author><json:item><name>W. Klöpffer</name></json:item><json:item><name>E.-G. Kohl</name></json:item><json:item><name>G. Kaufmann</name></json:item></author><host><author></author><title>Batelle-Institut Frankfurt, Draft, Report PUG/WK10</title></host><title>Photodegradation of Fe(III)-, Cu(II)-, Ni(II)-and Zn(II)-EDTA complexes in water</title></json:item><json:item><author><json:item><name>M. Koch</name></json:item><json:item><name>P. Leumann</name></json:item></author><host><volume>40</volume><pages><last>479</last><first>477</first></pages><author></author><title>Korrespondenz Abwasser-Betriebs-Info</title></host><title>About the behaviour of sequestering agents from detergents in wastewater treatment plants of the Canton Zurich, Switzerland</title></json:item><json:item><author><json:item><name>U. Lahl</name></json:item><json:item><name>H. Burbaum</name></json:item></author><host><volume>35</volume><pages><last>364</last><first>360</first></pages><author></author><title>Korrespondenz Abwasser</title></host><title>Analysis of single compounds in the influent and effluent of a municipal sewage treatment plant</title></json:item><json:item><author><json:item><name>J.J. Lauff</name></json:item><json:item><name>D.B. Steele</name></json:item><json:item><name>L.A. Coogan</name></json:item><json:item><name>J.M. Breitfeller</name></json:item></author><host><volume>56</volume><pages><last>3353</last><first>3346</first></pages><author></author><title>Appl. Envir. Microbiol.</title></host><title>Degradation of the ferric chelate of EDTA by a pure culture of an Agrobacterium spec</title></json:item><json:item><author><json:item><name>H.B. Lockhart</name></json:item><json:item><name>R.V. Blakeley</name></json:item></author><host><volume>9</volume><pages><last>1038</last><first>1035</first></pages><author></author><title>Envir. Sci. Technol.</title></host><title>Aerobic photodegradation of Fe(III)-(Ethylenedinitrilo)tetracetate (ferric EDTA)</title></json:item><json:item><author><json:item><name>E.L. Madsen</name></json:item><json:item><name>M. Alexander</name></json:item></author><host><volume>50</volume><pages><last>349</last><first>342</first></pages><author></author><title>Appl. Envir. Microbiol.</title></host><title>Effects of chemical speciation on the mineralization of organic compounds by microorganisms</title></json:item><json:item><author><json:item><name>D.W. Margerum</name></json:item><json:item><name>G.R. Cayley</name></json:item><json:item><name>D.C. Weatherburn</name></json:item><json:item><name>G.K. Pagenkopf</name></json:item></author><host><author></author><title>ACS Monograph 174</title></host><serie><author></author><title>Coordination Chemistry</title></serie><title>Kinetics and mechanisms of complex formation and ligand exchange</title></json:item><json:item><author><json:item><name>G. Müller</name></json:item><json:item><name>U. Förstner</name></json:item></author><host><volume>9</volume><pages><last>152</last><first>150</first></pages><author></author><title>Z. Wasser Abwasser Forsch.</title></host><title>Experimental mobilization of copper and zinc from aquatic sediments by some polyphosphate substitutes in detergents</title></json:item><json:item><author><json:item><name>P. Natarajan</name></json:item><json:item><name>J.F. Endicott</name></json:item></author><host><volume>77</volume><pages><last>2054</last><first>2049</first></pages><author></author><title>J. Phys. Chem.</title></host><title>Photoredox behavior of transition metal-ethylenediaminetetraacetate complexes</title></json:item><json:item><author><json:item><name>B. Nörtemann</name></json:item></author><host><volume>58</volume><pages><last>676</last><first>671</first></pages><author></author><title>Appl. Envir. Microbiol.</title></host><title>Total degradation of EDTA by mixed cultures and a bacterial isolate</title></json:item><json:item><author><json:item><name>C. Schaffner</name></json:item><json:item><name>W. Giger</name></json:item></author><host><volume>312</volume><pages><last>421</last><first>413</first></pages><author></author><title>J. Chromat.</title></host><title>Determination of nitrilotriacetic acid in water by high-resolution gas chromatography</title></json:item><json:item><author><json:item><name>S. Schürch</name></json:item><json:item><name>G. Dübendorfer</name></json:item></author><host><volume>80</volume><pages><last>334</last><first>324</first></pages><author></author><title>Mitteil. Gebiete Lebensmittel Hyg.</title></host><title>Determination of nitrilotriacetic acid and ethylenediaminetetraacetic acid in water by gas chromatography</title></json:item><json:item><author><json:item><name>J.M. Tiedje</name></json:item></author><host><volume>30</volume><pages><last>329</last><first>327</first></pages><author></author><title>Appl. Microbiol.</title></host><title>Microbial degradation of ethylenediaminetetraacetate in soils and sediments</title></json:item><json:item><host><author></author><title>MINEQL—A Chemical Equilibrium Program in BASIC</title></host></json:item><json:item><author><json:item><name>H. Xue</name></json:item><json:item><name>L. Sigg</name></json:item></author><host><volume>38</volume><pages><last>1213</last><first>1200</first></pages><author></author><title>Limnol. Oceanogr.</title></host><title>Free cupric ion concentration and Cu(II) speciation in a eutrophic lake</title></json:item><json:item><author><json:item><name>H. Xue</name></json:item><json:item><name>L. Sigg</name></json:item></author><host><volume>284</volume><pages><last>515</last><first>505</first></pages><author></author><title>Anal. Chim. Acta</title></host><title>Zinc speciation in lake waters and its determination by ligand exchange with EDTA and differential pulse anodic stripping voltammetry</title></json:item><json:item><author><json:item><name>H. Xue</name></json:item><json:item><name>L. Sigg</name></json:item><json:item><name>F.G. Kari</name></json:item></author><host><volume>29</volume><pages><last>68</last><first>59</first></pages><author></author><title>Envir. Sci. Technol.</title></host><title>Speciation of EDTA in natural waters: exchange kinetics of FeEDTA in river water</title></json:item><json:item><author><json:item><name>R.G. Zepp</name></json:item><json:item><name>D.M. Cline</name></json:item></author><host><volume>11</volume><pages><last>366</last><first>359</first></pages><author></author><title>Envir. Sci. Technol.</title></host><title>Rates of direct photolysis in aquatic environment</title></json:item></refBibs><genre><json:string>research-article</json:string></genre><serie><editor><json:item><name>A.E. 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Field studies were undertaken to quantify the speciation of EDTA in influents and effluents of sewage treatment plants. Chemical equilibrium calculations are of only limited use for this purpose because several weeks are needed to reach thermodynamic equilibrium in wastewater due to slow metal exchange processes. In the effluents from treatment plants that precipitate phosphate, concentrations of dissolved Fe (0.05 μm- and 0.45 μm-filterable) correlated with the concentrations of EDTA. An operational scheme, using sunlight or artificial light sources for specific photoconversion of FeEDTA species, was applied to distinguish between photo-degradable (=FeEDTA) and photo-resistent EDTA species. Field studies conducted at three municipal wastewater treatment facilities showed that EDTA speciation changes from the input to the output because FeEDTA is formed from other metal-EDTA complexes after addition of iron(II)-containing solutions into the aeration tanks. With respect to total amounts of EDTA, fractions of FeEDTA in the influents and effluents varied from 10 to 55% and from 20 to 90%. Mass balances comprising sampling periods of several days showed that no significant elimination of EDTA occured by biological or chemical processes during sewage treatment, whereas the chemically related phosphate substitute nitrilotriacetic acid (NTA) was efficiently degraded (>90%). As long as the speciation of EDTA in wastewaters is dominated by FeEDTA, and aerobic conditions are maintained, the remobilization of common heavy metals out of sewage sludge is unlikely to occur.</p></abstract><textClass><keywords scheme="keyword"><list><head>Keywords</head><item><term>ethylenediaminetetraacetate acid (EDTA)</term></item><item><term>speciation</term></item><item><term>sewage treatment</term></item><item><term>photodegradable species</term></item><item><term>heavy metal remobilization</term></item><item><term>nitrilotriacetate (NTA)</term></item></list></keywords></textClass></profileDesc><revisionDesc><change when="1995">Published</change></revisionDesc></teiHeader></istex:fulltextTEI><json:item><extension>txt</extension><original>false</original><mimetype>text/plain</mimetype><uri>https://api.istex.fr/document/B65A0D6D68D531E3522067D4B2336A55D557CEA1/fulltext/txt</uri></json:item></fulltext><metadata><istex:metadataXml wicri:clean="Elsevier, elements deleted: tail"><istex:xmlDeclaration>version="1.0" encoding="utf-8"</istex:xmlDeclaration><istex:docType PUBLIC="-//ES//DTD journal article DTD version 4.5.2//EN//XML" URI="art452.dtd" name="istex:docType"></istex:docType><istex:document><converted-article version="4.5.2" docsubtype="fla"><item-info><jid>WR</jid><aid>95001255</aid><ce:pii>0043-1354(95)00125-5</ce:pii><ce:doi>10.1016/0043-1354(95)00125-5</ce:doi><ce:copyright type="unknown" year="1995"></ce:copyright></item-info><head><ce:title>Speciation and fate of ethylenediaminetetraacetate (EDTA) in municipal wastewater treatment</ce:title><ce:author-group><ce:author><ce:given-name>Franz Guenter</ce:given-name><ce:surname>Kari</ce:surname></ce:author><ce:author><ce:given-name>Walter</ce:given-name><ce:surname>Giger</ce:surname><ce:cross-ref refid="COR1"><ce:sup>∗</ce:sup></ce:cross-ref></ce:author><ce:affiliation><ce:textfn>Swiss Federal Institute for Environmental Science and Technology (EAWAG), CH-8600 Dübendorf, Switzerland</ce:textfn></ce:affiliation><ce:correspondence id="COR1"><ce:label>∗</ce:label><ce:text>Author to whom all correspondence should be addressed.</ce:text></ce:correspondence></ce:author-group><ce:abstract><ce:section-title>Abstract</ce:section-title><ce:abstract-sec><ce:simple-para>The speciation of EDTA in sewage effluents leaving wastewater treatment plants determines its ultimate fate in natural surface waters, since only the Fe(III)-EDTA complex (FeEDTA) is quickly degraded by direct photolysis, whereas other EDTA species are very slowly transformed, if at all, by biological or chemical processes. Field studies were undertaken to quantify the speciation of EDTA in influents and effluents of sewage treatment plants. Chemical equilibrium calculations are of only limited use for this purpose because several weeks are needed to reach thermodynamic equilibrium in wastewater due to slow metal exchange processes. In the effluents from treatment plants that precipitate phosphate, concentrations of dissolved Fe (0.05 μm- and 0.45 μm-filterable) correlated with the concentrations of EDTA. An operational scheme, using sunlight or artificial light sources for specific photoconversion of FeEDTA species, was applied to distinguish between photo-degradable (=FeEDTA) and photo-resistent EDTA species. Field studies conducted at three municipal wastewater treatment facilities showed that EDTA speciation changes from the input to the output because FeEDTA is formed from other metal-EDTA complexes after addition of iron(II)-containing solutions into the aeration tanks. With respect to total amounts of EDTA, fractions of FeEDTA in the influents and effluents varied from 10 to 55% and from 20 to 90%. Mass balances comprising sampling periods of several days showed that no significant elimination of EDTA occured by biological or chemical processes during sewage treatment, whereas the chemically related phosphate substitute nitrilotriacetic acid (NTA) was efficiently degraded (>90%). As long as the speciation of EDTA in wastewaters is dominated by FeEDTA, and aerobic conditions are maintained, the remobilization of common heavy metals out of sewage sludge is unlikely to occur.</ce:simple-para></ce:abstract-sec></ce:abstract><ce:keywords><ce:section-title>Keywords</ce:section-title><ce:keyword><ce:text>ethylenediaminetetraacetate acid (EDTA)</ce:text></ce:keyword><ce:keyword><ce:text>speciation</ce:text></ce:keyword><ce:keyword><ce:text>sewage treatment</ce:text></ce:keyword><ce:keyword><ce:text>photodegradable species</ce:text></ce:keyword><ce:keyword><ce:text>heavy metal remobilization</ce:text></ce:keyword><ce:keyword><ce:text>nitrilotriacetate (NTA)</ce:text></ce:keyword></ce:keywords></head></converted-article></istex:document></istex:metadataXml><mods version="3.6"><titleInfo><title>Speciation and fate of ethylenediaminetetraacetate (EDTA) in municipal wastewater treatment</title></titleInfo><titleInfo type="alternative" contentType="CDATA"><title>Speciation and fate of ethylenediaminetetraacetate (EDTA) in municipal wastewater treatment</title></titleInfo><name type="personal"><namePart type="given">Franz Guenter</namePart><namePart type="family">Kari</namePart><affiliation>Swiss Federal Institute for Environmental Science and Technology (EAWAG), CH-8600 Dübendorf, Switzerland</affiliation><role><roleTerm type="text">author</roleTerm></role></name><name type="personal"><namePart type="given">Walter</namePart><namePart type="family">Giger</namePart><affiliation>Swiss Federal Institute for Environmental Science and Technology (EAWAG), CH-8600 Dübendorf, Switzerland</affiliation><description>Author to whom all correspondence should be addressed.</description><role><roleTerm type="text">author</roleTerm></role></name><typeOfResource>text</typeOfResource><genre type="research-article" displayLabel="Full-length article"></genre><originInfo><publisher>ELSEVIER</publisher><dateIssued encoding="w3cdtf">1995</dateIssued><copyrightDate encoding="w3cdtf">1995</copyrightDate></originInfo><language><languageTerm type="code" authority="iso639-2b">eng</languageTerm><languageTerm type="code" authority="rfc3066">en</languageTerm></language><physicalDescription><internetMediaType>text/html</internetMediaType></physicalDescription><abstract lang="en">The speciation of EDTA in sewage effluents leaving wastewater treatment plants determines its ultimate fate in natural surface waters, since only the Fe(III)-EDTA complex (FeEDTA) is quickly degraded by direct photolysis, whereas other EDTA species are very slowly transformed, if at all, by biological or chemical processes. Field studies were undertaken to quantify the speciation of EDTA in influents and effluents of sewage treatment plants. Chemical equilibrium calculations are of only limited use for this purpose because several weeks are needed to reach thermodynamic equilibrium in wastewater due to slow metal exchange processes. In the effluents from treatment plants that precipitate phosphate, concentrations of dissolved Fe (0.05 μm- and 0.45 μm-filterable) correlated with the concentrations of EDTA. An operational scheme, using sunlight or artificial light sources for specific photoconversion of FeEDTA species, was applied to distinguish between photo-degradable (=FeEDTA) and photo-resistent EDTA species. Field studies conducted at three municipal wastewater treatment facilities showed that EDTA speciation changes from the input to the output because FeEDTA is formed from other metal-EDTA complexes after addition of iron(II)-containing solutions into the aeration tanks. With respect to total amounts of EDTA, fractions of FeEDTA in the influents and effluents varied from 10 to 55% and from 20 to 90%. Mass balances comprising sampling periods of several days showed that no significant elimination of EDTA occured by biological or chemical processes during sewage treatment, whereas the chemically related phosphate substitute nitrilotriacetic acid (NTA) was efficiently degraded (>90%). As long as the speciation of EDTA in wastewaters is dominated by FeEDTA, and aerobic conditions are maintained, the remobilization of common heavy metals out of sewage sludge is unlikely to occur.</abstract><subject><genre>Keywords</genre><topic>ethylenediaminetetraacetate acid (EDTA)</topic><topic>speciation</topic><topic>sewage treatment</topic><topic>photodegradable species</topic><topic>heavy metal remobilization</topic><topic>nitrilotriacetate (NTA)</topic></subject><relatedItem type="host"><titleInfo><title>Water Research</title></titleInfo><titleInfo type="abbreviated"><title>WR</title></titleInfo><genre type="journal">journal</genre><originInfo><dateIssued encoding="w3cdtf">199601</dateIssued></originInfo><identifier type="ISSN">0043-1354</identifier><identifier type="PII">S0043-1354(00)X0007-3</identifier><part><date>199601</date><detail type="volume"><number>30</number><caption>vol.</caption></detail><detail type="issue"><number>1</number><caption>no.</caption></detail><extent unit="issue pages"><start>1</start><end>245</end></extent><extent unit="pages"><start>122</start><end>134</end></extent></part></relatedItem><identifier type="istex">B65A0D6D68D531E3522067D4B2336A55D557CEA1</identifier><identifier type="DOI">10.1016/0043-1354(95)00125-5</identifier><identifier type="PII">0043-1354(95)00125-5</identifier><recordInfo><recordContentSource>ELSEVIER</recordContentSource></recordInfo></mods></metadata></istex></record>Pour manipuler ce document sous Unix (Dilib)
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