Effects of Dissolved Organic Matter on Uptake and Translocation of Lead in Brassica chinensis and Potential Health Risk of Pb

Renying Li, Zhigao Zhou, Xiaojin Xie, Yingxue Li, Yaohong Zhang and Xianghua Xu
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Renying Li: Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China
Zhigao Zhou: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China
Xiaojin Xie: Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China
Yingxue Li: Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China
Yaohong Zhang: Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China
Xianghua Xu: Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science & Technology, Nanjing 210044, China

IJERPH, 2016, vol. 13, issue 7, 1-11

Abstract: Dissolved organic matter (DOM) can affect the bioavailability of heavy metals in soil, especially in soils used for vegetable production, where intensive organic fertilization is applied. The present study examined the effects of DOM derived from commercial organic fertilizers (COF), cow manure (COM) and chicken manure (CHM), on uptake and translocation of lead (Pb) in Brassica chinensis in a pot experiment. The results indicate that DOM derived from CHM (DOM CHM ) significantly increased Pb concentrations in roots of B. chinensis ( p < 0.05). By contrast, there was no significant increase in shoot Pb concentration for all the DOM treatments except the high DOM CHM treatment in the soil with 800 mg·kg ?1 Pb. Consistent with the Pb concentrations in shoots, translocation factor of Pb from soil to shoot and specific lead uptake (SLU) by B. chinensis were significantly increased for the high DOM CHM treatment in the high Pb soil, but not for other DOM treatments. Based on the results of this study, the application of DOM to the soil with 800 mg·kg ?1 Pb could result in an increase in total Pb annually ingested by the inhabitants of Nanjing City in the range of 2018–9640 kg, with the highest estimates resulting from the high DOM CHM treatment. This study suggests the risk may rise under some conditions as indicated in the high DOM CHM treatment and high Pb pollution level.

Keywords: Brassica chinensis; dissolved organic matter; lead; uptake; translocation (search for similar items in EconPapers)
JEL-codes: I I1 I3 Q Q5 (search for similar items in EconPapers)
Date: 2016
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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