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Pb Content, Risk Level and Primary-Source Apportionment in Wheat and Rice Grains in the Lihe River Watershed, Taihu Region, Eastern China

文献类型： 外文期刊

作者： Chen, Lian 1 ; Zhou, Shenglu 2 ; Yang, Qiong 1 ; Li, Qingrong 1 ; Xing, Dongxu 1 ; Xiao, Yang 1 ; Tang, Cuiming 1 ;

作者机构： 1.Guangdong Acad Agr Sci, Sericultural & Agrifood Res Inst, Guangzhou 510610, Peoples R China

2.Nanjing Univ, Sch Geog & Ocean Sci, 163 Xianlin Rd, Nanjing 210023, Peoples R China

3.Minist Agr & Rural Affairs, Key Lab Urban Agr South China, Guangzhou 510610, Peoples R China

关键词： grains; Pb contamination; primary-source apportionment; risk assessment; isotope analysis; model calculation

期刊名称：INTERNATIONAL JOURNAL OF ENVIRONMENTAL RESEARCH AND PUBLIC HEALTH （ 影响因子：3.39； 五年影响因子：3.789 ）

ISSN：

年卷期： 2021 年 18 卷 12 期

页码：

收录情况： SCI

摘要： This study detailed a complete research from Lead (Pb) content level to ecological and health risk to direct- and primary-sources apportionment arising from wheat and rice grains, in the Lihe River Watershed of the Taihu region, East China. Ecological and health risk assessment were based on the pollution index and US Environmental Protection Agency (EPA) health risk assessment model. A three-stage quantitative analysis program based on Pb isotope analysis to determine the relative contributions of primary sources involving (1) direct-source apportionment in grains with a two-end-member model, (2) apportionment of soil and dustfall sources using the IsoSource model, and (3) the integration of results of (1) and (2) was notedly first proposed. The results indicated that mean contents of Pb in wheat and rice grains were 0.54 and 0.45 mg/kg and both the bio-concentration factors (BCF) were <<1; the ecological risk pollution indices were 1.35 for wheat grains and 1.11 for rice grains; hazard quotient (HQ) values for adult and child indicating health risks through ingestion of grains were all <1; Coal-fired industrial sources account for up to 60% of Pb in the grains. This study provides insights into the management of grain Pb pollution and a new method for its source apportionment.

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