Removal turbidity and separation of heavy metals using electrocoagulation-electroflotation technique A case study.
Identifieur interne : 000434 ( Main/Exploration ); précédent : 000433; suivant : 000435Removal turbidity and separation of heavy metals using electrocoagulation-electroflotation technique A case study.
Auteurs : B. Merzouk [Algérie] ; B. Gourich ; A. Sekki ; K. Madani ; M. ChibaneSource :
- Journal of hazardous materials [ 1873-3336 ] ; 2009.
English descriptors
- KwdEn :
- Cadmium (chemistry), Cadmium (isolation & purification), Copper (chemistry), Copper (isolation & purification), Electrochemical Techniques, Iron (chemistry), Iron (isolation & purification), Lead (chemistry), Lead (isolation & purification), Metals, Heavy (chemistry), Metals, Heavy (isolation & purification), Nickel (chemistry), Nickel (isolation & purification), Waste Disposal, Fluid (methods), Water Pollutants, Chemical (chemistry), Water Pollutants, Chemical (isolation & purification), Water Purification (methods), Zinc (chemistry), Zinc (isolation & purification).
- MESH :
- chemical , chemistry : Cadmium, Copper, Iron, Lead, Metals, Heavy, Nickel, Water Pollutants, Chemical, Zinc.
- chemical , isolation & purification : Cadmium, Copper, Iron, Lead, Metals, Heavy, Nickel, Water Pollutants, Chemical, Zinc.
- methods : Waste Disposal, Fluid, Water Purification.
- Electrochemical Techniques.
Abstract
The electrocoagulation (EC) process was developed to overcome the drawbacks of conventional wastewater treatment technologies. This process is very effective in removing organic pollutants including dyestuff wastewater and allows for the reduction of sludge generation. The purposes of this study were to investigate the effects of the operating parameters, such as pH, initial concentration (C(0)), duration of treatment (t), current density (j), interelectrode distance (d) and conductivity (kappa) on a synthetic wastewater in the batch electrocoagulation-electroflotation (EF) process. The optimal operating conditions were determined and applied to a textile wastewater and separation of some heavy metals. Initially a batch-type EC-EF reactor was operated at various current densities (11.55, 18.6, 35.94, 56.64, 74.07 and 91.5mA/cm(2)) and various interelectrode distance (1, 2 and 3cm). For solutions with 300mg/L of silica gel, high turbidity removal (89.54%) was obtained without any coagulants when the current density was 11.55mA/cm(2), initial pH was 7.6, conductivity was 2.1mS/cm, duration of treatment was 10min and interelectrode distance was 1cm. The application of the optimal operating parameters on a textile wastewater showed a high removal efficiency for various items: suspended solid (SS) 86.5%, turbidity 81.56%, biological oxygen demand (BOD(5)) 83%, chemical oxygen demand (COD) 68%, and color over 92.5%. During the EC process under these conditions, we have studied the separation of some heavy metal ions such as iron (Fe), nickel (Ni), copper (Cu), zinc (Zn), lead (Pb) and cadmium (Cd) with different initial concentrations in the range of 50-600mg/L and initial pH between 7.5 and 7.8. This allowed us to show that the kinetics of electrocoagulation-electroflotation is very quick (<15min), and the removal rate reaches 95%.
DOI: 10.1016/j.jhazmat.2008.07.144
PubMed: 18799259
Affiliations:
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Sekki</name></author><author><name sortKey="Madani, K" sort="Madani, K" uniqKey="Madani K" first="K" last="Madani">K. Madani</name></author><author><name sortKey="Chibane, M" sort="Chibane, M" uniqKey="Chibane M" first="M" last="Chibane">M. Chibane</name></author></titleStmt><publicationStmt><idno type="wicri:source">PubMed</idno><date when="2009">2009</date><idno type="RBID">pubmed:18799259</idno><idno type="pmid">18799259</idno><idno type="doi">10.1016/j.jhazmat.2008.07.144</idno><idno type="wicri:Area/PubMed/Corpus">000106</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Corpus" wicri:corpus="PubMed">000106</idno><idno type="wicri:Area/PubMed/Curation">000106</idno><idno type="wicri:explorRef" wicri:stream="PubMed" wicri:step="Curation">000106</idno><idno type="wicri:Area/PubMed/Checkpoint">000106</idno><idno type="wicri:explorRef" wicri:stream="Checkpoint" wicri:step="PubMed">000106</idno><idno type="wicri:Area/Ncbi/Merge">000029</idno><idno type="wicri:Area/Ncbi/Curation">000029</idno><idno type="wicri:Area/Ncbi/Checkpoint">000029</idno><idno type="wicri:Area/Main/Merge">000445</idno><idno type="wicri:Area/Main/Curation">000434</idno><idno type="wicri:Area/Main/Exploration">000434</idno></publicationStmt><sourceDesc><biblStruct><analytic><title xml:lang="en">Removal turbidity and separation of heavy metals using electrocoagulation-electroflotation technique A case study.</title><author><name sortKey="Merzouk, B" sort="Merzouk, B" uniqKey="Merzouk B" first="B" last="Merzouk">B. Merzouk</name><affiliation wicri:level="1"><nlm:affiliation>Département d'Hydraulique, Université Mohamed Boudiaf de M'sila, Algeria. mbelkov@yahoo.fr</nlm:affiliation><country xml:lang="fr">Algérie</country><wicri:regionArea>Département d'Hydraulique, Université Mohamed Boudiaf de M'sila</wicri:regionArea><wicri:noRegion>Université Mohamed Boudiaf de M'sila</wicri:noRegion></affiliation></author><author><name sortKey="Gourich, B" sort="Gourich, B" uniqKey="Gourich B" first="B" last="Gourich">B. Gourich</name></author><author><name sortKey="Sekki, A" sort="Sekki, A" uniqKey="Sekki A" first="A" last="Sekki">A. Sekki</name></author><author><name sortKey="Madani, K" sort="Madani, K" uniqKey="Madani K" first="K" last="Madani">K. Madani</name></author><author><name sortKey="Chibane, M" sort="Chibane, M" uniqKey="Chibane M" first="M" last="Chibane">M. Chibane</name></author></analytic><series><title level="j">Journal of hazardous materials</title><idno type="eISSN">1873-3336</idno><imprint><date when="2009" type="published">2009</date></imprint></series></biblStruct></sourceDesc></fileDesc><profileDesc><textClass><keywords scheme="KwdEn" xml:lang="en"><term>Cadmium (chemistry)</term><term>Cadmium (isolation & purification)</term><term>Copper (chemistry)</term><term>Copper (isolation & purification)</term><term>Electrochemical Techniques</term><term>Iron (chemistry)</term><term>Iron (isolation & purification)</term><term>Lead (chemistry)</term><term>Lead (isolation & purification)</term><term>Metals, Heavy (chemistry)</term><term>Metals, Heavy (isolation & purification)</term><term>Nickel (chemistry)</term><term>Nickel (isolation & purification)</term><term>Waste Disposal, Fluid (methods)</term><term>Water Pollutants, Chemical (chemistry)</term><term>Water Pollutants, Chemical (isolation & purification)</term><term>Water Purification (methods)</term><term>Zinc (chemistry)</term><term>Zinc (isolation & purification)</term></keywords><keywords scheme="MESH" type="chemical" qualifier="chemistry" xml:lang="en"><term>Cadmium</term><term>Copper</term><term>Iron</term><term>Lead</term><term>Metals, Heavy</term><term>Nickel</term><term>Water Pollutants, Chemical</term><term>Zinc</term></keywords><keywords scheme="MESH" type="chemical" qualifier="isolation & purification" xml:lang="en"><term>Cadmium</term><term>Copper</term><term>Iron</term><term>Lead</term><term>Metals, Heavy</term><term>Nickel</term><term>Water Pollutants, Chemical</term><term>Zinc</term></keywords><keywords scheme="MESH" qualifier="methods" xml:lang="en"><term>Waste Disposal, Fluid</term><term>Water Purification</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Electrochemical Techniques</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">The electrocoagulation (EC) process was developed to overcome the drawbacks of conventional wastewater treatment technologies. This process is very effective in removing organic pollutants including dyestuff wastewater and allows for the reduction of sludge generation. The purposes of this study were to investigate the effects of the operating parameters, such as pH, initial concentration (C(0)), duration of treatment (t), current density (j), interelectrode distance (d) and conductivity (kappa) on a synthetic wastewater in the batch electrocoagulation-electroflotation (EF) process. The optimal operating conditions were determined and applied to a textile wastewater and separation of some heavy metals. Initially a batch-type EC-EF reactor was operated at various current densities (11.55, 18.6, 35.94, 56.64, 74.07 and 91.5mA/cm(2)) and various interelectrode distance (1, 2 and 3cm). For solutions with 300mg/L of silica gel, high turbidity removal (89.54%) was obtained without any coagulants when the current density was 11.55mA/cm(2), initial pH was 7.6, conductivity was 2.1mS/cm, duration of treatment was 10min and interelectrode distance was 1cm. The application of the optimal operating parameters on a textile wastewater showed a high removal efficiency for various items: suspended solid (SS) 86.5%, turbidity 81.56%, biological oxygen demand (BOD(5)) 83%, chemical oxygen demand (COD) 68%, and color over 92.5%. During the EC process under these conditions, we have studied the separation of some heavy metal ions such as iron (Fe), nickel (Ni), copper (Cu), zinc (Zn), lead (Pb) and cadmium (Cd) with different initial concentrations in the range of 50-600mg/L and initial pH between 7.5 and 7.8. This allowed us to show that the kinetics of electrocoagulation-electroflotation is very quick (<15min), and the removal rate reaches 95%.</div></front></TEI><affiliations><list><country><li>Algérie</li></country></list><tree><noCountry><name sortKey="Chibane, M" sort="Chibane, M" uniqKey="Chibane M" first="M" last="Chibane">M. Chibane</name><name sortKey="Gourich, B" sort="Gourich, B" uniqKey="Gourich B" first="B" last="Gourich">B. Gourich</name><name sortKey="Madani, K" sort="Madani, K" uniqKey="Madani K" first="K" last="Madani">K. Madani</name><name sortKey="Sekki, A" sort="Sekki, A" uniqKey="Sekki A" first="A" last="Sekki">A. Sekki</name></noCountry><country name="Algérie"><noRegion><name sortKey="Merzouk, B" sort="Merzouk, B" uniqKey="Merzouk B" first="B" last="Merzouk">B. Merzouk</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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