Publication: Synergistic effects of organic contaminants and soil organic matter on the soil-water partitioning and effectiveness of a nonionic surfactant (Triton X-100)
Issued Date
2008-12-01
Resource Type
ISSN
15476529
10889868
10889868
Other identifier(s)
2-s2.0-46249098279
Rights
Mahidol University
Rights Holder(s)
SCOPUS
Bibliographic Citation
Bioremediation Journal. Vol.12, No.2 (2008), 88-97
Suggested Citation
Achara Ussawarujikulchai, Shonali Laha, Berrin Tansel Synergistic effects of organic contaminants and soil organic matter on the soil-water partitioning and effectiveness of a nonionic surfactant (Triton X-100). Bioremediation Journal. Vol.12, No.2 (2008), 88-97. doi:10.1080/10889860802060170 Retrieved from: https://repository.li.mahidol.ac.th/handle/20.500.14594/19225
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Title
Synergistic effects of organic contaminants and soil organic matter on the soil-water partitioning and effectiveness of a nonionic surfactant (Triton X-100)
Abstract
Napthalene- and decane-contaminated soils were treated with Triton X-100 (a nonionic surfactant) to characterize the soil-water partitioning behavior of the surfactant in soils with different organic content. Soil samples with different organic content were prepared by mixing sand-mulch mixtures at different proportions. The experimental results indicated that the amount of surfactant sorbed onto soil increased with increasing soil organic content and increasing surfactant concentration. The effective critical micelle concentration (CMC) also increased with increasing organic content in soil. The CMC of Triton X-100 in aqueous systems without soil was about 0.3 mM and the effective CMC values measured for soil-water-surfactant systems (approximately 1:19 soil/water ratio) with 25%, 50%, and 75%mulch content were 0.9, 1.0, and 1.7 mM, respectively. Sub-CMC surfactant sorption was modeled accurately with both the Freundlich and the linear isotherm. The maximum surfactant sorption onto soil varied from 66% to 82% of added surfactant in the absence of contaminant. The effective CMC values for Triton X-100 increased to some extent in the presence of contaminants, as did the maximum surfactant sorption. The maximum surfactant sorbed onto the soil with 75% mulch content increased from 82% for clean soils, to 95% and 96% for soils samples contaminated with naphthalene and decane, respectively. Copyright © 2008 Taylor and Francis Group, LLC.