Mass balance study of nonylphenol ethoxylates and their metabolites in an urban river contaminated by nonylphenol.
Mass balance study of nonylphenol ethoxylates and their metabolites in an urban river contaminated by nonylphenol.
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发表时间：
2007
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通讯作者：
Mamoru Motegi;Kiyoshi Nojiri;Shigeo Hosono;K. Kawamura
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作者：
Mamoru Motegi;Kiyoshi Nojiri;Shigeo Hosono;K. Kawamura
在之前的研究中，一家橡胶制品制造厂发现一条名为卡墨河的城市河流被壬基酚（NP）污染。为了确定工厂废水对河流污染的贡献，对河流及其10个入流渠道中的NP、壬基酚聚氧乙烯（NPnEOs, n = 1-15）和壬基酚羧酸（NPmECs, m = 1-10）进行了质量平衡研究。河水中壬基酚类化合物（T-NPCs）的总浓度上游采样点为4.6 nM/L，下游采样点为54.6 nM/L。在与目标河段相连的入流河道中，t - npc浓度在0.4 ~ 487.1 nM/L之间，其中工厂污水入流河道的t - npc浓度最高。输入（上游采样点和10个流入通道的出口）和输出（下游采样点）的t - npc质量流量分别为458.0 mM/d和828.2 mM/d。高污染入流通道的质量流量占投入量的82.4%。与氯离子的质量平衡相比，输出区t - npc的质量流量仍高于输入区。这一现象归因于Output地区NP和npneo （n = 1-3）的高质量流量，并确定其潜在来源为河流沉积物。
In previous studies, an urban river called Kamo River was found to be polluted with nonylphenol (NP) by a rubber product manufacturing factory. To determine the contribution of the factory effluent to the river pollution, a mass balance study was conducted for NP, nonylphenol ethoxylates (NPnEOs, n = 1-15), and nonylphenol carboxylates (NPmECs, m = 1-10) in the waters of the river and its 10 inflow channels. The total concentration of nonylphenolic compounds (T-NPCs) in the river water was 4.6 nM/L at the upstream sampling point and 54.6 nM/L at the downstream sampling point. T-NPCs concentration ranged from 0.4 to 487.1 nM/L in the waters of the inflow channels connected to the targeted river section, and the highest value was observed in the water of the inflow channel which receives the factory effluent. The mass flows of T-NPCs were 458.0 mM/day for Input (the upstream sampling point and outlets of 10 inflow channels) and 828.2 mM/day for Output (the downstream sampling point). The mass flow of the highly polluted inflow channel comprised 82.4% of Input. In comparison with the mass balance of chloride ion, the mass flow of T-NPCs in Output was still higher than that in Input. This phenomenon was attributed to the high mass flows of NP and NPnEOs (n = 1-3) in Output, and their potential source was determined to be the river sediment.