Probabilistic Environmental Risk Assessment for Linear Alkyl Benzene Sulfonate (LAS) in Japan Reduces Assessment Uncertainty

Q3 Environmental Science Journal of Water and Environment Technology Pub Date : 2020-01-01 DOI:10.2965/jwet.19-016
Sachiko Shiode, Kathleen McDonough, S. Belanger, G. Carr
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引用次数: 1

Abstract

The environmental risk of the anionic surfactant, linear alkylbenzene sulfonate (LAS), in Japanese surface waters is presented using a probabilistic exposure and effects assessment. A chronic toxicity Species Sensitivity Distribution (SSD) (20 species) is used to define the 5th percentile hazardous concentration and compared to experimental stream mesocosm findings following toxicity normalization to various LAS carbon chain lengths (CL) ranging from C10 to C14. CL-dependent ecotoxicity data are combined with environmental monitoring in Japan where CL distributions of LAS are also quantified. Over 9,000 surface water measurements with CL specific LAS concentrations were compiled. Because LAS displays a common polar narcotic mode of action across all CL, a Toxic Unit (TU) concentration-addition approach can be followed whereby TU exceeding 1 correspond to environmental risk of cumulative Predicted Exposure Concentrations (PEC)/Predicted No Effects Concentration (PNEC) also exceeding 1. SSD, mesocosm, and monitoring data confirm that an extremely small number of water samples exceed a TU of 1 (5 of 4748 for SSD PNEC; 0 sites for mesocosm PNEC). Total LAS measurements from > 25,000 sites were compared to CL normalized PNECs demonstrating > 99.99% probability that the PEC would be less than the PNEC indicating negligible risk from LAS in Japan surface waters.
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日本线性烷基苯磺酸盐(LAS)环境风险概率评估降低了评估的不确定性
采用概率暴露和影响评估的方法,介绍了阴离子表面活性剂线性烷基苯磺酸盐(LAS)在日本地表水中的环境风险。使用慢性毒性物种敏感性分布(SSD)(20个物种)来定义第5百分位危险浓度,并将毒性归一化后的实验流中观结果与从C10到C14的不同LAS碳链长度(CL)进行比较。CL依赖的生态毒性数据与日本的环境监测相结合,其中LAS的CL分布也被量化。编制了超过9,000个地表水测量结果,其中包括CL特定的LAS浓度。由于LAS在所有CL中显示出共同的极性麻醉模式,因此可以遵循毒性单位(TU)浓度相加方法,其中TU超过1对应于累积预测暴露浓度(PEC)/预测无影响浓度(PNEC)也超过1的环境风险。SSD、mesocosm和监测数据证实,极少数水样的TU值超过1 (SSD PNEC的4748的5);0个位点为中观PNEC)。将来自50万个地点的LAS总测量值与CL标准化PNEC进行了比较,结果表明,有99.99%的概率,PEC将小于PNEC,这表明日本地表水中LAS的风险可以忽略不计。
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来源期刊
Journal of Water and Environment Technology
Journal of Water and Environment Technology Environmental Science-Water Science and Technology
CiteScore
1.80
自引率
0.00%
发文量
8
审稿时长
43 weeks
期刊介绍: The Journal of Water and Environment Technology is an Open Access, fully peer-reviewed international journal for all aspects of the science, technology and management of water and the environment. The journal’s articles are clearly placed in a broader context to be relevant and interesting to our global audience of researchers, engineers, water technologists, and policy makers. JWET is the official journal of the Japan Society on Water Environment (JSWE) published in English, and welcomes submissions that take basic, applied or modeling approaches to the interesting issues facing the field. Topics can include, but are not limited to: water environment, soil and groundwater, drinking water, biological treatment, physicochemical treatment, sludge and solid waste, toxicity, public health and risk assessment, test and analytical methods, environmental education and other issues. JWET also welcomes seminal studies that help lay the foundations for future research in the field. JWET is committed to an ethical, fair and rapid peer-review process. It is published six times per year. It has two article types: Original Articles and Review Articles.
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