Occurrence, correlation, and partitioning of organophosphate esters in soil and tree bark from a megacity, Western China
文献类型： 外文期刊
第一作者： Wang, Can
作者： Wang, Can;Yuan, Rui-Yu;Wei, Shi-Qiang;He, Ming-Jing;Wei, Shi-Qiang;He, Ming-Jing
作者机构：
关键词： Organophosphate esters; Soil; Tree bark; Source; Correlation; Partitioning
期刊名称：ENVIRONMENTAL SCIENCE AND POLLUTION RESEARCH （ 影响因子：5.19； 五年影响因子：5.053 ）
ISSN： 0944-1344
年卷期：
页码：
收录情况： SCI
摘要： Concern over the influences of constant addition of emerging anthropogenic chemicals to the environment has become a public issue during the rapid urbanization. Here, we investigated the occurrence of organophosphate esters (OPEs) in soil and corresponding tree bark in a megacity, Western China. Our results showed levels of OPEs in tree bark (1250 +/- 573 ng/g dry weight (dw)) were 1-2 orders of magnitude higher than those in soil (40.4 +/- 30.8 ng/g dw). Rooster Mountain is a background mountain area, exhibiting significantly lower concentrations of OPEs in soil and tree bark than those in other sites with relatively high population density. This result highlights the effect of human activities on the distribution of OPEs in environmental matrices. Alkyl-OPEs were predominant compounds in soil, whereas halogenated- (Cl-) OPEs were characterized in tree bark. Furthermore, tris(2-chloroethyl) phosphate (TCEP) positively correlated with tris(2-chloroisopropyl) phosphate (TCIPP) in soil (r(2) = 0.43, P < 0.05) while negatively correlated with TCIPP in tree bark (r(2) = 0.31, P < 0.05). The ratios of logarithm concentrations of OPEs in tree bark to those in soil correlated well with logK(OA) values of OPEs from 6 to 10, indicating the equilibrium status was achieved between OPE partitioning in soil and in tree bark. Nevertheless, tris (2-butoxyethyl) phosphate (TBEP) and tris(2-ethylhexyl) phosphate (TEHP) with high values of logK(OA) deviated from this linear tendency, which was possibly due to the fact that they were subjected to the particle-bound deposition process, leading to partition into the soil.
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