TY - GEN
T1 - Bioavailability and speciation of Cd, Pb, Cu, and Zn in sewage irrigated soils in the southeastern suburbs of Beijing
AU - Zhang, Rong
AU - Fan, Wenhong
AU - Chen, Jun
AU - Sun, Rumeng
AU - Zhao, Chunmei
PY - 2009
Y1 - 2009
N2 - The bioavailability of trace metals in sewage irrigated soils in the southeastern suburbs of Beijing, China was examined by using in vitro digestive fluid extraction method. A sequential chemical extraction (SCE) procedure was used to measure the speciation of trace metals in soil samples, including Cd, Pb, Cu, and Zn. The average concentrations of Cd, Pb, Cu, and Zn were 2.23, 37.9, 59.9, and 127.0 mg kg-1, respectively, indicating that the heavy pollution of soils was caused by Cd, Cu, Pb, and Zn which were mainly distributed in the residual phase, whereas Cd was mostly in the carbonate phase. The extraction efficiencies of Cd, Pb, Cu, and Zn quantified by the in vitro digestive fluid extraction method, were lower than those by the SCE procedure, and the extraction efficiencies of both methods followed the same pattern: Cd >Zn>Pb>Cu. The amount of trace metals extracted by using these two methods were positively correlated. Therefore, the in vitro digestive fluid extraction method can be used to examine the bioavailability of soil-bound trace metals.
AB - The bioavailability of trace metals in sewage irrigated soils in the southeastern suburbs of Beijing, China was examined by using in vitro digestive fluid extraction method. A sequential chemical extraction (SCE) procedure was used to measure the speciation of trace metals in soil samples, including Cd, Pb, Cu, and Zn. The average concentrations of Cd, Pb, Cu, and Zn were 2.23, 37.9, 59.9, and 127.0 mg kg-1, respectively, indicating that the heavy pollution of soils was caused by Cd, Cu, Pb, and Zn which were mainly distributed in the residual phase, whereas Cd was mostly in the carbonate phase. The extraction efficiencies of Cd, Pb, Cu, and Zn quantified by the in vitro digestive fluid extraction method, were lower than those by the SCE procedure, and the extraction efficiencies of both methods followed the same pattern: Cd >Zn>Pb>Cu. The amount of trace metals extracted by using these two methods were positively correlated. Therefore, the in vitro digestive fluid extraction method can be used to examine the bioavailability of soil-bound trace metals.
KW - Bioavailability
KW - Earthworm
KW - In vitro digestion
KW - Soil
KW - Speciation
UR - https://www.scopus.com/pages/publications/64349117130
U2 - 10.4028/www.scientific.net/MSF.610-613.335
DO - 10.4028/www.scientific.net/MSF.610-613.335
M3 - 会议稿件
AN - SCOPUS:64349117130
SN - 9780878493401
SN - 9780878493401
SN - 9780878493401
T3 - Materials Science Forum
SP - 335
EP - 344
BT - Materials Research
A2 - Gu, Zhongwei
A2 - Gu, Zhongwei
A2 - Gu, Zhongwei
A2 - Han, Yafang
A2 - Han, Yafang
A2 - Han, Yafang
A2 - Pan, Fusheng
A2 - Pan, Fusheng
A2 - Pan, Fusheng
A2 - Pan, Fusheng
A2 - Pan, Fusheng
A2 - Pan, Fusheng
A2 - Wang, Xitao
A2 - Wang, Xitao
A2 - Wang, Xitao
A2 - Weng, Duan
A2 - Weng, Duan
A2 - Weng, Duan
A2 - Zhou, Shaoxiong
A2 - Zhou, Shaoxiong
A2 - Zhou, Shaoxiong
PB - Trans Tech Publications Ltd
T2 - MRS International Materials Research Conference, IMRC 2008
Y2 - 9 June 2008 through 12 June 2008
ER -