Sediment metal bioavailability in Lake Taihu, China: evaluation of sequential extraction, DGT, and PBET techniques
Data(s) |
01/09/2015
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Resumo |
<p>The European “Community Bureau of Reference” (BCR) sequential extraction procedure, diffusive gradient in thin-films technique (DGT), and physiologically based extraction test were applied to assess metal bioavailability in sediments of Lake Taihu (<em class="EmphasisTypeItalic" style="outline: 0px; color: rgb(51, 51, 51); font-family: 'Helvetica Neue', Arial, Helvetica, sans-serif; font-size: 13px; line-height: 20.8px;">n</em> = 13). Findings from the three methods showed that Cd was a significant problem in the western lake whereas Cu, Zn, and Ni pollution was most severe in the northern lake. Results from the sequential extraction revealed that more than 50 % of the Cu and Zn were highly mobile and defined within the extractable fraction (AS1 + FM2 + OS3) in the majority of the sediments, in contrast extractable fractions of Ni and Cd were lower than 50 % in most of the sampling sites. Average Cu, Zn, Ni, and Cd bioaccessibilities were <50 % in the gastric phase. Zn and Cd bioaccessibility in the intestinal phase was ∼50 % lower than the gastric phase while bioaccessibilities of Cu and Ni were 47–57 % greater than the gastric phase. Linear regression analysis between DGT and BCR measurements indicated that the extractable fractions (AS1 + FM2 + OS3) in the reducing environment were the main source of DGT uptake, suggesting that DGT is a good in situ evaluation tool for metal bioavailability in sediments.</p> |
Identificador |
http://dx.doi.org/10.1007/s11356-015-4565-9 http://www.scopus.com/inward/record.url?scp=84940451419&partnerID=8YFLogxK |
Idioma(s) |
eng |
Direitos |
info:eu-repo/semantics/restrictedAccess |
Fonte |
Ren , J , Williams , P N , Luo , J , Ma , H & Wang , X 2015 , ' Sediment metal bioavailability in Lake Taihu, China: evaluation of sequential extraction, DGT, and PBET techniques ' Environmental Science and Pollution Research , vol 22 , no. 17 , pp. 12919-12928 . DOI: 10.1007/s11356-015-4565-9 |
Palavras-Chave | #Bioavailability #Diffusive gradients in thin films #Lake Taihu #Metal #Sediment #/dk/atira/pure/subjectarea/asjc/2300/2304 #Environmental Chemistry #/dk/atira/pure/subjectarea/asjc/2300/2307 #Health, Toxicology and Mutagenesis #/dk/atira/pure/subjectarea/asjc/2300/2310 #Pollution |
Tipo |
article |