Occurrence and Fate of Benzophenone-Type UV Filters in a Tropical Urban Watershed
Occurrence and Fate of Benzophenone-Type UV Filters in a Tropical Urban Watershed
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DOI：
10.1021/acs.est.7b05634
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发表时间：
2018-04-03
影响因子：
11.4
通讯作者：
Gin, Karina Yew-Hoong
中科院分区：
文献类型：
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作者：
Mao, Feijian;You, Luhua;Gin, Karina Yew-Hoong
研究了2,4-二羟基二苯甲酮（2,4oh - bp）、2,2',4,4'-四羟基二苯甲酮（2,21,4,4/OH-BP）、2-羟基-4-甲氧基二苯甲酮（2,2' - oh -4,4'- meo - bp）、2,2'-二羟基-4,4'-二甲氧基二苯甲酮（2,2' - oh - 4me0 - bp）、2,2'-二羟基-4-甲氧基二苯甲酮（2,2' - oh - 4me0 - bp）、4-羟基二苯甲酮（40H-BP）、和4,4'-二羟基二苯甲酮（4DHB）)在热带城市流域组成的五个主要支流，流入一个管理良好的流域。二苯甲酮总浓度（Sigma c - bp）在上覆散装水中分别为19-230.8 ng L-1，孔隙水中为48-115 ng L-1，悬浮固体中为295-5813 ng g（-1）干重（d.w.），表层沉积物中为6-37 ng g(-1) d.w.。支流（Sigma c - bp值：19 ~ 231 ng L-1）是进入盆地的二苯甲酮化合物的主要来源（Sigma c - bp值：20 ~ 81 ng L-1）。在水柱中，水相的垂直浓度分布是均匀的，而悬浮物的浓度随深度的增加而降低。二苯甲酮在悬浮物和沉积物中的分布也不同。初步风险评估表明，除了间歇性释放的2OH-4MeO-BP外，7种bp不太可能对当地水生生物造成生态毒理学风险。
The study investigated the occurrence and fate of seven benzophenone-type UV filters (i.e., 2,4-dihydroxybenzophenone (2,4OH-BP), 2,2',4,4'-tetrahydroxybenzophenone (2,21,4,4/OH-BP), 2-hydroxy-4-methoxybenzophenone (2,2OH-4MeO-BP), 2,2'-Dihydroxy-4,4'- dimethoxybenzophenone (2,2'OH-4,4'MeO-BP), 2,2'-dihydroxy-4-methoxybenzophenone (2,2'OH-4Me0-BP), 4-hydroxybenzophenone (40H-BP), and 4,4'-dihyroxybenzophenone (4DHB)) in a tropical urban watershed consisting of five major tributaries that discharge into a well-managed basin. Total benzophenone concentrations (Sigma C-BPs) varied from 19-230.8 ng L-1 in overlying bulk water, 48-115 ng L-1 in pore water, 295-5813 ng g(-1) dry weight (d.w.) in suspended solids, and 6-37 ng g(-1) d.w. in surficial sediments, respectively. The tributaries (Sigma C-BPs: 19-231 ng L-1) were the main source of benzophenone compounds entering the basin (Sigma C-BPs: 20-81 ng L-1). In the water column, the vertical concentration profile in the aqueous phase was uniform while concentrations in the suspended solids decreased with depth. Different distribution profiles were also identified for benzophenones in suspended solids and sediments. A preliminary risk assessment suggested that the seven BPs were unlikely to pose ecotoxicological risks to local aquatic organisms except for 2OH-4MeO-BP in the case of an intermittent release.