| 4种表面活性剂及其混合物对p,p'-DDT污染土壤洗脱效果 |
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| 引用本文： | 李登宇, 孙丽娜, 吴昊. 4种表面活性剂及其混合物对p,p'-DDT污染土壤洗脱效果[J]. 环境工程学报, 2017, 11(1): 589-593. doi: 10.12030/j.cjee.201508107 |
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| 作者姓名： | 李登宇 孙丽娜 吴昊 |
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| 作者单位： | 1. 沈阳大学环境学院, 沈阳, 110044; 2. 沈阳大学区域污染环境生态修复教育部重点实验室, 沈阳, 110044 |
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| 基金项目： | 国家重点基础研究发展计划（973）项目（2014CB441100） |
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| 摘 要： | 为了研究表面活性剂对p，p'-DDT污染土壤的淋洗效果，选取了4种阴、非离子表面活性剂，对人工p，p'-DDT污染土壤进行单一和复配洗脱实验。结果表明，对于人工p，p'-DDT污染土壤，阴离子表面活性剂洗脱效果优于非离子表面活性剂，其中阴离子表面活性剂十二烷基硫酸钠（SDS）和鼠李糖脂（RL）的洗脱效果较好，添加量为15 000 mg·L-1时洗脱率分别达到44.5%和36.5%，均优于非离子表面活性剂吐温80（TW80）（30.4%）和曲拉通100（TR100）（20.3%）；研究还表明非离子表面活性剂在添加量达到10 000 mg·L-1后，继续增加表面活性剂浓度，洗脱效果提升不明显。混合表面活性剂体系中，总添加量为10 000 mg·L-1时，SDS-TW80混合体系对p，p'-DDT的洗脱率为42%，高于SDS-TR100（34.9%）、RL-TW80（33.4%）和RL-TR100（37.4%），表面活性剂混合体系对于p，p'-DDT的淋洗有明显的协同作用。
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| 关 键 词： | 有机氯 DDT 洗脱率 表面活性剂 土壤淋洗 |
| 收稿时间： | 2015-09-07 |
Effectiveness of 4 surfactants and their mixtures in p,p'-DDT contaminated soil flushing |
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| LI Dengyu, SUN Lina, WU Hao. Effectiveness of 4 surfactants and their mixtures in p,p'-DDT contaminated soil flushing[J]. Chinese Journal of Environmental Engineering, 2017, 11(1): 589-593. doi: 10.12030/j.cjee.201508107 |
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| Authors: | LI Dengyu SUN Lina WU Hao |
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| Affiliation: | 1. School of Environmental Studies, Shenyang University, Shenyang 110044, China; 2. Key Laboratory of Regional Environment and Eco-Remediation, Ministry of Education, Shenyang University, Shenyang 110044, China |
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| Abstract: | A flushing investigation of four surfactants (sodium dodecyl sulfate (SDS), RL, TW80, and TR100) and mixed surfactants comprising the above four surfactants was conducted to determine an optimum solvent for flushing soil contaminated with p,p'-dichlorodiphenyltrichloroethane (p,p'-DDT). Results showed that in p,p'-DDT-contaminated soil, the removal effects of anionic surfactants were significantly higher than those of nonionic surfactants at 15 000 mg·L-1. When comparing the four single surfactants, SDS was the best surfactant with a removal efficiency of 44.5%; those of RL, TW80, and TR100 were 36.5%, 30.4%, and 20.3%, respectively. In addition, the removal efficiencies of nonionic surfactants did not increase significantly with the application rate of the surfactants when the application rate was higher than 10 000 mg·L-1. At 10 000 mg·L-1, the mixture of SDS and TW80 (SDS-TW80) was the best eluent with a removal efficiency of 42% for p,p'-DDT. Meanwhile, the other three mixed eluents, including SDS-TR100 (34.9%), RL-TW80 (33.4%), and RL-TR100 (37.4%), have obvious synergy as well. |
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| Keywords: | organochlorine DDT elution efficiency surfactants soil flushing |
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