TY - JOUR
T1 - Lead in paddy soils and rice plants and its potential health risk around Lechang Lead/Zinc Mine, Guangdong, China
AU - Yang, Q. W.
AU - Shu, W. S.
AU - QIU, Jianwen
AU - Wang, H. B.
AU - Lan, C. Y.
N1 - Funding Information:
We acknowledge financial supports from the National “863” Project of China (No. 2001AA645010-3) and the National Natural Science Foundation of China (No. 30170178, 30100024).
PY - 2004/9
Y1 - 2004/9
N2 - As part of a project on phytoextraction of lead (Pb) in paddy soils around a lead/zinc (Pb/Zn) Mine in Lechang of Guangdong Province, South China, the concentration distribution of Pb in paddy soil-rice system was investigated, and its potential health risk to animal/human was evaluated. Total and diethylenetetraminepentaacetic acid (DTPA)-extractable Pb in soils averaged 1486 and 268 μg/g, respectively. According to sequential extraction procedure, soil Pb occurred primarily in the residual, carbonate and exchangeable fractions (30.2%, 26.7% and 19.1%, respectively). Lead extracted by the gastric juice simulation test (GJST) was 1068 μg/g and accounted for 75.4% of the total concentration. Mean Pb concentrations of 419 μg/g in rice root, 69.1 μg/g in whole straw, 51.0 μg/g in part straw (without two leaves near above the root), 44.9 μg/g in stalk, 21.9 μg/g in hull, 13.2 μg/g in grain with hull and 4.67μg/g in grain without hull (namely, unpolished rice) were found. Lead concentrations in both soil and rice plant were far above the corresponding tolerable levels. Lead daily intakes by local residents were 2.6 mg for adults and 1.2 mg for children, which were much higher than the allowable level. Thus, Pb in this area might pose a potential health risk to the local population.
AB - As part of a project on phytoextraction of lead (Pb) in paddy soils around a lead/zinc (Pb/Zn) Mine in Lechang of Guangdong Province, South China, the concentration distribution of Pb in paddy soil-rice system was investigated, and its potential health risk to animal/human was evaluated. Total and diethylenetetraminepentaacetic acid (DTPA)-extractable Pb in soils averaged 1486 and 268 μg/g, respectively. According to sequential extraction procedure, soil Pb occurred primarily in the residual, carbonate and exchangeable fractions (30.2%, 26.7% and 19.1%, respectively). Lead extracted by the gastric juice simulation test (GJST) was 1068 μg/g and accounted for 75.4% of the total concentration. Mean Pb concentrations of 419 μg/g in rice root, 69.1 μg/g in whole straw, 51.0 μg/g in part straw (without two leaves near above the root), 44.9 μg/g in stalk, 21.9 μg/g in hull, 13.2 μg/g in grain with hull and 4.67μg/g in grain without hull (namely, unpolished rice) were found. Lead concentrations in both soil and rice plant were far above the corresponding tolerable levels. Lead daily intakes by local residents were 2.6 mg for adults and 1.2 mg for children, which were much higher than the allowable level. Thus, Pb in this area might pose a potential health risk to the local population.
KW - GJST
KW - Health risk
KW - Lead pollution
KW - Mining activity
KW - Oryza sativa L.
UR - http://www.scopus.com/inward/record.url?scp=2942661636&partnerID=8YFLogxK
U2 - 10.1016/j.envint.2004.02.002
DO - 10.1016/j.envint.2004.02.002
M3 - Journal article
C2 - 15196836
AN - SCOPUS:2942661636
SN - 0160-4120
VL - 30
SP - 883
EP - 889
JO - Environment International
JF - Environment International
IS - 7
ER -
