Current State, Distribution, and Sources of Phthalate Esters and Organophosphate Esters in Soils of the Three Gorges Reservoir Region, China
Current State, Distribution, and Sources of Phthalate Esters and Organophosphate Esters in Soils of the Three Gorges Reservoir Region, China
复制标题
中国三峡库区土壤中邻苯二甲酸酯和有机磷酸酯的现状、分布及来源
DOI：
10.1007/s00244-017-0469-7
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发表时间：
2018-04-01
影响因子：
4
通讯作者：
Wei, Shi-Qiang
中科院分区：
文献类型：
--
作者：
He, Ming-Jing;Yang, Ting;Wei, Shi-Qiang
对三峡库区中国西部农田和河岸带表层土壤中的邻苯二甲酸酯类(PAEs)和有机磷酸酯类(OPEs)进行了鉴定和定量。农田土壤中PAEs和Opes的平均值分别为618和266 ng/g干重，河岸土壤中PAEs和Opes的平均值分别为560和499 ng/g干重。OPE的发生应被视为TGR地区的一个危险因素。两种类型土壤中PAEs的空间分布规律相似，WZ处的PAEs浓度较高，这可能与人类活动有关。水动力条件可能是造成有机污染物空间分布略有差异的重要因素。各采样点河岸土壤中有机磷农药的浓度均高于农田土壤中的含量，这部分归因于TGR的完整运行。邻苯二甲酸二丁酯(DNBP)是两种土壤中最主要的PAEs同系物。值得注意的是，三(甲基苯基)磷酸盐(TMPP)的贡献率上升，其次是2-乙基己基二苯基磷酸盐(EHDPP)，占有机污染物总量的90%以上，航运或/和当地人类活动可能是主要贡献者。主成分PAEs组成的细微差异可能在很大程度上归因于两种土壤的排放源不同。两种土壤的不同聚集态表明，人类活动以及TGR的充分运行可能起到一定的作用。
Phthalate esters (PAEs) and organophosphate esters (OPEs) were identified and quantified in surface soils from farmland and riparian areas of the Three Gorges Reservoir (TGR), western China. Generally, the mean values of PAEs and OPEs were 618 and 266 ng/g dry weight (dw) in farmland soil and 560 and 499 ng/g dw in riparian soil, respectively. The occurrence of OPEs should be regarded as a risk factor in the TGR region. Analogous spatial distribution patterns for PAEs were observed with higher concentrations observed at site WZ in both types of soil, which might relate to the anthropogenic activities. The hydrodynamic conditions might be important factors contributing to the slightly different spatial distribution of OPEs. The concentrations of OPEs in riparian soil exceed those in farmland soil at all sampling sites, which could partly be ascribed to the complete operation of the TGR. Dibutyl phthalate (DnBP) was the most dominated PAEs congener in both types of soil. Of particular note is the elevated contribution of tris(methylphenyl) phosphate (TMPP), followed by 2-ethylhexyl diphenyl phosphate (EHDPP), accounting for more than 90% of the total OPEs, and the shipping or/and the local human activity might be considered as the major contributor. The slight differences in PAEs composition of principal components might largely attribute to the variety of emission sources in two types of soil. The different cluster patterns between two types of soil indicated that the anthropogenic activities as well as the full operation of TGR, may play a role.