Spatial and seasonal variations and ecotoxicological significance of sediment trace metal concentrations in Kebir-Rhumel basin (Northeast of Algeria).
Identifieur interne : 000469 ( Main/Exploration ); précédent : 000468; suivant : 000470Spatial and seasonal variations and ecotoxicological significance of sediment trace metal concentrations in Kebir-Rhumel basin (Northeast of Algeria).
Auteurs : Leila Sahli [Algérie] ; Fatima-Zohra Afri-Mehennaoui ; Mohamed El Hadef El Okki ; Christian Blaise ; Smail MehennaouiSource :
- Water science and technology : a journal of the International Association on Water Pollution Research [ 0273-1223 ] ; 2011.
Descripteurs français
- KwdFr :
- MESH :
- Wicri :
- geographic : Algérie.
English descriptors
- KwdEn :
- MESH :
- chemical , chemistry : Metals, Water Pollutants, Chemical.
- chemical , toxicity : Metals, Water Pollutants, Chemical.
- geographic : Algeria.
- chemistry : Geologic Sediments, Rivers.
- Seasons.
Abstract
This study sought to assess sediment contamination by trace metals (cadmium, chromium, cobalt, copper, manganese, nickel, lead and zinc), to localize contaminated sites and to identify environmental risk for aquatic organisms in Wadis of Kebir Rhumel basin in the Northeast of Algeria. Water and surficial sediments (0-5 cm) were sampled in winter, spring, summer and autumn from 37 sites along permanent Wadis of the Kebir Rhumel basin. Sediment trace metal contents were measured by Flame Atomic Absorption Spectroscopy. Trace metals median concentrations in sediments followed a decreasing order: Mn > Zn > Pb > Cr > Cu > Ni > Co > Cd. Extreme values (dry weights) of the trace metals are as follows: 0.6-3.4 microg/g for Cd, 10-216 microg/g for Cr, 9-446 microg/g for Cu, 3-20 microg/g for Co, 105-576 microg/g for Mn, 10-46 microg/g for Ni, 11-167 microg/g for Pb, and 38-641 microg/g for Zn. According to world natural concentrations, all sediments collected were considered as contaminated by one or more elements. Comparing measured concentrations with American guidelines (Threshold Effect Level: TEL and Probable Effect Level: PEL) showed that biological effects could be occasionally observed for cadmium, chromium, lead and nickel levels but frequently observed for copper and zinc levels. Sediment quality was shown to be excellent for cobalt and manganese but medium to bad for cadmium, chromium, copper, lead, nickel and zinc regardless of sites.
PubMed: 22335122
Affiliations:
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Biology and Environment, University of Constantine</wicri:regionArea><wicri:noRegion>University of Constantine</wicri:noRegion></affiliation></author><author><name sortKey="Afri Mehennaoui, Fatima Zohra" sort="Afri Mehennaoui, Fatima Zohra" uniqKey="Afri Mehennaoui F" first="Fatima-Zohra" last="Afri-Mehennaoui">Fatima-Zohra Afri-Mehennaoui</name></author><author><name sortKey="El Okki, Mohamed El Hadef" sort="El Okki, Mohamed El Hadef" uniqKey="El Okki M" first="Mohamed El Hadef" last="El Okki">Mohamed El Hadef El Okki</name></author><author><name sortKey="Blaise, Christian" sort="Blaise, Christian" uniqKey="Blaise C" first="Christian" last="Blaise">Christian Blaise</name></author><author><name sortKey="Mehennaoui, Smail" sort="Mehennaoui, Smail" uniqKey="Mehennaoui S" first="Smail" last="Mehennaoui">Smail Mehennaoui</name></author></analytic><series><title level="j">Water science and technology : a journal of the International Association on Water Pollution Research</title><idno 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xml:lang="en"><term>Metals</term><term>Water Pollutants, Chemical</term></keywords><keywords scheme="MESH" type="geographic" xml:lang="en"><term>Algeria</term></keywords><keywords scheme="MESH" qualifier="chemistry" xml:lang="en"><term>Geologic Sediments</term><term>Rivers</term></keywords><keywords scheme="MESH" qualifier="toxicité" xml:lang="fr"><term>Métaux</term><term>Polluants chimiques de l'eau</term></keywords><keywords scheme="MESH" xml:lang="en"><term>Seasons</term></keywords><keywords scheme="MESH" xml:lang="fr"><term>Algérie</term><term>Métaux</term><term>Polluants chimiques de l'eau</term><term>Rivières</term><term>Saisons</term><term>Sédiments géologiques</term></keywords><keywords scheme="Wicri" type="geographic" xml:lang="fr"><term>Algérie</term></keywords></textClass></profileDesc></teiHeader><front><div type="abstract" xml:lang="en">This study sought to assess sediment contamination by trace metals (cadmium, chromium, cobalt, copper, manganese, nickel, lead and zinc), to localize contaminated sites and to identify environmental risk for aquatic organisms in Wadis of Kebir Rhumel basin in the Northeast of Algeria. Water and surficial sediments (0-5 cm) were sampled in winter, spring, summer and autumn from 37 sites along permanent Wadis of the Kebir Rhumel basin. Sediment trace metal contents were measured by Flame Atomic Absorption Spectroscopy. Trace metals median concentrations in sediments followed a decreasing order: Mn > Zn > Pb > Cr > Cu > Ni > Co > Cd. Extreme values (dry weights) of the trace metals are as follows: 0.6-3.4 microg/g for Cd, 10-216 microg/g for Cr, 9-446 microg/g for Cu, 3-20 microg/g for Co, 105-576 microg/g for Mn, 10-46 microg/g for Ni, 11-167 microg/g for Pb, and 38-641 microg/g for Zn. According to world natural concentrations, all sediments collected were considered as contaminated by one or more elements. Comparing measured concentrations with American guidelines (Threshold Effect Level: TEL and Probable Effect Level: PEL) showed that biological effects could be occasionally observed for cadmium, chromium, lead and nickel levels but frequently observed for copper and zinc levels. Sediment quality was shown to be excellent for cobalt and manganese but medium to bad for cadmium, chromium, copper, lead, nickel and zinc regardless of sites.</div></front></TEI><affiliations><list><country><li>Algérie</li></country></list><tree><noCountry><name sortKey="Afri Mehennaoui, Fatima Zohra" sort="Afri Mehennaoui, Fatima Zohra" uniqKey="Afri Mehennaoui F" first="Fatima-Zohra" last="Afri-Mehennaoui">Fatima-Zohra Afri-Mehennaoui</name><name sortKey="Blaise, Christian" sort="Blaise, Christian" uniqKey="Blaise C" first="Christian" last="Blaise">Christian Blaise</name><name sortKey="El Okki, Mohamed El Hadef" sort="El Okki, Mohamed El Hadef" uniqKey="El Okki M" first="Mohamed El Hadef" last="El Okki">Mohamed El Hadef El Okki</name><name sortKey="Mehennaoui, Smail" sort="Mehennaoui, Smail" uniqKey="Mehennaoui S" first="Smail" last="Mehennaoui">Smail Mehennaoui</name></noCountry><country name="Algérie"><noRegion><name sortKey="Sahli, Leila" sort="Sahli, Leila" uniqKey="Sahli L" first="Leila" last="Sahli">Leila Sahli</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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