Spatial and temporal variation of heavy metal risk and source in sediments of Dongting Lake wetland, mid-south China.
Identifieur interne : 000102 ( Main/Exploration ); précédent : 000101; suivant : 000103Spatial and temporal variation of heavy metal risk and source in sediments of Dongting Lake wetland, mid-south China.
Auteurs : Jie Liang [République populaire de Chine] ; Jiayu Liu ; Xingzhong Yuan ; Guangming Zeng ; Xu Lai ; Xiaodong Li ; Haipeng Wu ; Yujie Yuan ; Fei LiSource :
- Journal of environmental science and health. Part A, Toxic/hazardous substances & environmental engineering [ 1532-4117 ] ; 2015.
Descripteurs français
- Wicri :
- geographic : République populaire de Chine.
English descriptors
- KwdEn :
- MESH :
- chemical , analysis : Metals, Heavy, Water Pollutants, Chemical.
- geographic : China.
- chemistry : Geologic Sediments, Lakes, Rivers.
- methods : Environmental Monitoring.
- Agriculture, Multivariate Analysis, Risk Assessment, Seasons, Wetlands.
Abstract
Surface sediments of Dongting Lake wetland were collected from ten sites to investigate variation trend, risk and sources of heavy metal distribution in dry seasons of 2011∼2013. The three-year mean concentrations (mg/kg) of Cr, Cu, Pb, Cd, Hg and As were 91.33, 36.27, 54.82, 4.39, 0.19 and 25.67, respectively, which were all higher than the corresponding background values. Sediment quality guidelines (SQGs) and Geo-accumulation index (Igeo) were used for the assessment of pollution level of heavy metals. The pollution risk of Cd, Hg and As were great and that of Cr needed urgent attention because of its obvious increase. Pollution load index (PLI) and geographic information system (GIS) methods were conducted to assess spatial and temporal variation of heavy metal contamination. Results confirmed an increased contamination contribution inflow from Xiang River. Multivariate statistical analyses were applied to identify contribution sources of heavy metal, which showed anthropogenic origin mainly from mining, smelting, chemical industry and agricultural activity.
DOI: 10.1080/10934529.2015.964636
PubMed: 25438136
Affiliations:
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The three-year mean concentrations (mg/kg) of Cr, Cu, Pb, Cd, Hg and As were 91.33, 36.27, 54.82, 4.39, 0.19 and 25.67, respectively, which were all higher than the corresponding background values. Sediment quality guidelines (SQGs) and Geo-accumulation index (Igeo) were used for the assessment of pollution level of heavy metals. The pollution risk of Cd, Hg and As were great and that of Cr needed urgent attention because of its obvious increase. Pollution load index (PLI) and geographic information system (GIS) methods were conducted to assess spatial and temporal variation of heavy metal contamination. Results confirmed an increased contamination contribution inflow from Xiang River. Multivariate statistical analyses were applied to identify contribution sources of heavy metal, which showed anthropogenic origin mainly from mining, smelting, chemical industry and agricultural activity.</div></front></TEI><affiliations><list><country><li>République populaire de Chine</li></country></list><tree><noCountry><name sortKey="Lai, Xu" sort="Lai, Xu" uniqKey="Lai X" first="Xu" last="Lai">Xu Lai</name><name sortKey="Li, Fei" sort="Li, Fei" uniqKey="Li F" first="Fei" last="Li">Fei Li</name><name sortKey="Li, Xiaodong" sort="Li, Xiaodong" uniqKey="Li X" first="Xiaodong" last="Li">Xiaodong Li</name><name sortKey="Liu, Jiayu" sort="Liu, Jiayu" uniqKey="Liu J" first="Jiayu" last="Liu">Jiayu Liu</name><name sortKey="Wu, Haipeng" sort="Wu, Haipeng" uniqKey="Wu H" first="Haipeng" last="Wu">Haipeng Wu</name><name sortKey="Yuan, Xingzhong" sort="Yuan, Xingzhong" uniqKey="Yuan X" first="Xingzhong" last="Yuan">Xingzhong Yuan</name><name sortKey="Yuan, Yujie" sort="Yuan, Yujie" uniqKey="Yuan Y" first="Yujie" last="Yuan">Yujie Yuan</name><name sortKey="Zeng, Guangming" sort="Zeng, Guangming" uniqKey="Zeng G" first="Guangming" last="Zeng">Guangming Zeng</name></noCountry><country name="République populaire de Chine"><noRegion><name sortKey="Liang, Jie" sort="Liang, Jie" uniqKey="Liang J" first="Jie" last="Liang">Jie Liang</name></noRegion></country></tree></affiliations></record>Pour manipuler ce document sous Unix (Dilib)
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