Effects of polyethoxylate lauryl ether (Brij 35) addition on phenanthrene biodegradation in a soil/water system

Chang Yi-T.; Hung Chun-H.; Chou Hsi-L.

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Effects of polyethoxylate lauryl ether (Brij 35) addition on phenanthrene biodegradation in a soil/water system

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Non-ionic surfactants usually are often selected for use in surfactant flushing technology, which is a process that can be used as part of PAH-contaminated soil bioremediation. Phenanthrene (PHE) biodegradation in the presence of polyethoxylate lauryl ether (Brij 35) was studied in two soil/water systems. The natural soil organic matter content (SOM) and the present of Brij 35, both above the critical micelle concentration (CMC) and below the CMC, changed the rate of PHE biodegradation in the presence of Brij 35. PHE biodegradation is different in the two different soil/water systems: PHE > PHE-Brij 35-Micelle > PHE-Brij 35-Monomer in the clay/water system; PHE-Brij 35-Micelle > PHE-Brij 35-Monomer > PHE in the natural soil/water system. Among the free-living species associated with PHE-Brij 35 biodegradation, Brevundimonas diminuta, Caulobacter spp., Mycoplana bullata, Acidovorax spp. and Pseudomonas aeruginosa accounted for 90.72 to 99.90 of the bacteria present. Specific hydrolytic enzymes, including esterases, glycosol-hydrolases and phosphatases, are expressed during PHE biodegradation. The information presented here will help the engineering design of more effective PAH bioremediation systems that use Brij 35 series flushing technology. In particular, micelles of Brij 35 can be used to accelerate the rate of remediation of PAH-contaminated soil in natural soil/water systems.

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《Journal of environmental science and health, Part A. Toxic/hazardous substances & environmental engineering》 |2014年第14期|1672-1684|共13页
作者
Chang Yi-T.; Hung Chun-H.; Chou Hsi-L.;
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作者单位

Soochow Univ, Dept Microbiol, Taipei 11102, Taiwan;

Natl Chung Hsing Univ, Dept Environm Engn, Taichung 40227, Taiwan;

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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
正文语种英语
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关键词
soil organic matter (SOM); free-living species phenanthrene (PHE); Critical micelle concentration (CMC); polyethoxylate lauryl ether (Brij 35);

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Effects of polyethoxylate lauryl ether (Brij 35) addition on phenanthrene biodegradation in a soil/water system

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