Distribution and Behavior of Nonylphenol, Octylphenol, and Nonylphenol Monoethoxylate in Tokyo Metropolitan Area: Their Association with Aquatic Particles and Sedimentary Distributions

壬基酚 流出物 河口 分配系数 环境化学 海湾 环境科学 污水 沉积物 水文学(农业) 污水处理 烷基酚 废水 化学 环境工程 海洋学 地质学 色谱法 古生物学 岩土工程 烷基 有机化学
作者
Tomohiko Isobe,Hajime Nishiyama,Arisa Nakashima,Hideshige Takada
出处
期刊:Environmental Science & Technology [American Chemical Society]
卷期号:35 (6): 1041-1049 被引量:349
标识
DOI:10.1021/es001250i
摘要

Distributions of alkylphenols (APs) [i.e., nonylphenol (NP), octylphenol (OP)], and nonylphenol monoethoxylate (NP1EO) in wastewater effluents, river water, and riverine and bay sediments in the Tokyo metropolitan area were demonstrated. During sewage treatments, NP and OP were efficiently removed from the sewage effluents through activated sludge treatments. Greater removal for NP (93% on average) than OP (84% on average) was consistent with their partitioning behavior to particles in primary and secondary effluents. NP concentrations in the river water samples ranged from 0.051 to 1.08 μg/L with higher concentrations in summer and spring than in colder seasons. In the river water samples, ∼20% of NP was found in the particulate phase. Organic carbon-normalized apparent partition coefficients (K'oc) for NP (105.22 ± 0.38) and OP (104.65 ± 0.42) were 1 order of magnitude higher than those expected from their octanol−water partition coefficients (Kow), indicating strong affinity of APs to aquatic particles. Among NP isomers, no significant differences in their K'oc values were suggested. This is consistent with surprisingly uniform isomer peak profiles among the technical standard and all the environmental samples analyzed. NP and OP were widely distributed in the river sediments in Tokyo, and relatively high concentrations (0.5−13.0 μg/g dry) of NP were observed in a long reach (∼10 km) in the Sumidagawa River. In situ production of APs in the river sediment was suggested. Seaward decreasing trend in APs concentration was observed from the estuary to the Tokyo Bay. APs were well preserved in a sediment core collected from the bay. The profile shows subsurface maximum of AP concentrations in the layer deposited around the mid-1970s. The recent decrease in AP concentrations can be attributed to the legal regulation of industrial wastewater in the early 1970s.
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