IMPACT OF SEDIMENT PARTITIONING METHODS ON ENVIRONMENTAL SAFETY ASSESSMENT OF SURFACTANTS

Robert G. Orth; Rebecca L. Powell; Greg Kutey; Richard A. Kimerle

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IMPACT OF SEDIMENT PARTITIONING METHODS ON ENVIRONMENTAL SAFETY ASSESSMENT OF SURFACTANTS

机译：沉积物划分方法对表面活性剂环境安全性评估的影响

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Selection of laboratory methods for partitioning and toxicity tests of sediments has a significant impact on interpretation of aquatic safety of surfactants. This is the case for the assessment of the sediment toxicity of C_(12) linear alkylbenzene sulfonates, LAS. In this study, the batch-equilibrium partition coefficient (K_d) was measured as a function of organic carbon, cation exchange capacity, and quantity of sediments. The quantity of sediment was varied from a low of 5 g per 1,000 ml of water to a level of 500 g to 500 ml of water. The measured K_d decreased by an order of magnitude when the ratio of water to sediments increased to 1:1, and as a consequence of this observation, LAS on suspended solids was included in the quantitaton of LAS in the water phase. When measured K_d values were then used to predict the toxicity (based on known aquatic toxicity concentrations of LAS using Ceriodaphnia dubia), LAS was calculated to be an order of magnitude less toxic by the low-solids test compared to the high-solids test system. This work reaffirms that selection of a laboratory test to assess environmental safety must be made on the basis of its correlation to the real-world behavior of the surfactant.

机译：选择用于沉积物分配和毒性测试的实验室方法，对解释表面活性剂的水生安全性具有重大影响。评估C_（12）线性烷基苯磺酸盐LAS的沉积物毒性时就是这种情况。在这项研究中，批次平衡分配系数（K_d）作为有机碳，阳离子交换容量和沉积物数量的函数进行测量。沉积物的量从每1,000毫升水5克的低到500克至500毫升水的水平不等。当水与沉积物的比例增加到1：1时，测得的K_d降低了一个数量级，并且由于这一观察结果，悬浮相中的LAS被包括在水相LAS的定量中。然后将测量的K_d值用于预测毒性（基于已知的使用杜鹃花鱼的LAS的水生毒性浓度）时，与高固含量测试系统相比，低固含量测试得出的LAS毒性低一个数量级。。这项工作重申，必须根据实验室测试与表面活性剂的实际行为之间的相关性来选择评估环境安全的实验室测试。

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来源
《Environmental toxicology and chemistry》 |1995年第2期|p.337-343|共7页
作者
Robert G. Orth; Rebecca L. Powell; Greg Kutey; Richard A. Kimerle;
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作者单位

Monsanto Environmental Sciences Center, 800 N. Lindbergh Blvd., St. Louis, Missouri 63167;

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收录信息美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
原文格式 PDF
正文语种 eng
中图分类环境卫生、环境医学;毒物学（毒理学）;化学工业废物处理与综合利用;
关键词
LAS; partitioning; ceriodaphnia dubia; sediments;

机译：LAS;分区;头颈蚤;沉积物;

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IMPACT OF SEDIMENT PARTITIONING METHODS ON ENVIRONMENTAL SAFETY ASSESSMENT OF SURFACTANTS

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