title: Effects of Dissolved Organic Matter on Uptake and Translocation of Lead in Brassica chinensis and Potential Health Risk of Pb.
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 (DOMCHM) 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 DOMCHM 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 DOMCHM 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 DOMCHM treatment. This study suggests the risk may rise under some conditions as indicated in the high DOMCHM treatment and high Pb pollution level.
authors.affiliation: Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science &amp; Technology, Nanjing 210044, China. ryli2005@nuist.edu.cn.|Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. ryli2005@nuist.edu.cn.|School of Chemical Engineering and Energy, Zhengzhou University, Zhengzhou 450001, China. ryli2005@nuist.edu.cn.
authors.forename: Renying
authors.initials: R
authors.lastname: Li
authors.affiliation: Key Laboratory of Soil Environment and Pollution Remediation, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008, China. zgzhou@issas.ac.cn.
authors.forename: Zhigao
authors.initials: Z
authors.lastname: Zhou
authors.affiliation: Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science &amp; Technology, Nanjing 210044, China. xxj_200210@nuist.edu.cn.
authors.forename: Xiaojin
authors.initials: X
authors.lastname: Xie
authors.affiliation: Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science &amp; Technology, Nanjing 210044, China. lyxue@nuist.edu.cn.
authors.forename: Yingxue
authors.initials: Y
authors.lastname: Li
authors.affiliation: Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science &amp; Technology, Nanjing 210044, China. yhzhang@nuist.edu.cn.
authors.forename: Yaohong
authors.initials: Y
authors.lastname: Zhang
authors.affiliation: Jiangsu Key Laboratory of Agricultural Meteorology, Nanjing University of Information Science &amp; Technology, Nanjing 210044, China. xianghua_xu@163.com.
authors.forename: Xianghua
authors.initials: X
authors.lastname: Xu
mesh_terms: D000818:Animals; D001937:Brassica / Q000187:drug effects* / Q000378:metabolism; D002417:Cattle; D002645:Chickens; D004305:Dose-Response Relationship, Drug; D005308:Fertilizers / Q000032:analysis*; D006812:Humic Substances / Q000032:analysis*; D007854:Lead / Q000378:metabolism*; D008372:Manure / Q000032:analysis*; D012989:Soil Pollutants / Q000378:metabolism*
chemical_list: D005308:Fertilizers; D006812:Humic Substances; D008372:Manure; D012989:Soil Pollutants; D007854:Lead
keywords: Brassica chinensis; dissolved organic matter; lead; translocation; uptake