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Title: Impact of sediment partitioning methods on environmental safety assessment of surfactants

Abstract

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[sub 12] linear alkylbenzene sulfonates, LAS. In this study, the batch-equilibrium partition coefficient (K[sub 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[sub 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 quantitation of LAS in the water phase. When measured K[sub 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 correlationmore » to the real-world behavior of the surfactant.« less

Authors:
; ; ;  [1]
  1. Monsanto Environmental Sciences Center, St. Louis, MO (United States)
Publication Date:
OSTI Identifier:
6528098
Resource Type:
Journal Article
Journal Name:
Environmental Toxicology and Chemistry; (United States)
Additional Journal Information:
Journal Volume: 14:2; Journal ID: ISSN 0730-7268
Country of Publication:
United States
Language:
English
Subject:
54 ENVIRONMENTAL SCIENCES; CRUSTACEANS; SENSITIVITY; SEDIMENTS; CONTAMINATION; SURFACTANTS; TOXICITY; WATER POLLUTION; BIOLOGICAL INDICATORS; ANIMALS; AQUATIC ORGANISMS; ARTHROPODS; INVERTEBRATES; POLLUTION; 540320* - Environment, Aquatic- Chemicals Monitoring & Transport- (1990-)

Citation Formats

Orth, R G, Powell, R L, Kutey, G, and Kimerle, R A. Impact of sediment partitioning methods on environmental safety assessment of surfactants. United States: N. p., 1995. Web. doi:10.1002/etc.5620140220.
Orth, R G, Powell, R L, Kutey, G, & Kimerle, R A. Impact of sediment partitioning methods on environmental safety assessment of surfactants. United States. https://doi.org/10.1002/etc.5620140220
Orth, R G, Powell, R L, Kutey, G, and Kimerle, R A. 1995. "Impact of sediment partitioning methods on environmental safety assessment of surfactants". United States. https://doi.org/10.1002/etc.5620140220.
@article{osti_6528098,
title = {Impact of sediment partitioning methods on environmental safety assessment of surfactants},
author = {Orth, R G and Powell, R L and Kutey, G and Kimerle, R A},
abstractNote = {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[sub 12] linear alkylbenzene sulfonates, LAS. In this study, the batch-equilibrium partition coefficient (K[sub 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[sub 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 quantitation of LAS in the water phase. When measured K[sub 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.},
doi = {10.1002/etc.5620140220},
url = {https://www.osti.gov/biblio/6528098}, journal = {Environmental Toxicology and Chemistry; (United States)},
issn = {0730-7268},
number = ,
volume = 14:2,
place = {United States},
year = {Wed Feb 01 00:00:00 EST 1995},
month = {Wed Feb 01 00:00:00 EST 1995}
}