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不同表面活性剂溶液冲洗油污土壤的对比试验研究 被引量:5

Contrast Test on Removal of Diesel from Polluted Soil by Two Surfactants
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摘要 选择不同表面活性剂浓度、冲洗流速及运行方式为影响因素,以冲洗有效孔隙体积数相同时累积冲出油量为考核目标.进行阴离子表面活性剂十二烷基苯磺酸钠(LAS)和非离子表面活性剂Tilton X-100冲洗油污土柱正交试验对比研究。结果表明:在同样的冲洗试验条件下,LAS的冲洗流速明显小于Triton X-100;在同样的冲洗有效孔隙体积下,LAS冲出油的总量相对较多,但冲洗所需时间相对较长;根据正交试验极差分析结果,影响LAS冲洗效果的主要因素是运行方式,影响Triton X-100冲洗效果的主要因素则是冲洗浓度。 Surfactant flushing (SF) technology is a relatively new technology for removing organic liquids from the subsurface environment. The contrast test focused on removal of diesel from polluted soil columns by surfactant flushing. Anionic surfactant-LAS and nonionic surfactant-Triton X-100 were employed. Soil columns uniformly polluted by diesel were flushed according to orthogonal table involving three factors: surfactant concentration, flushing velocity and running manners(continuous or periodic operation). Levels of surfaetant concentration were determined by the results of solubility experiments and magnitudes of flushing velocity were determined by changing the elevation between water level of surfactant solution and outlet of soil column. The results showed that at the same experimental conditions, LAS showed bigger flushing velocity than Triton X-100; LAS could removal more diesel from polluted soil column but need more time than Triton X-100 when cumulative effective void volume flushed by surfactants was same, and according to range analysis based on the results of orthogonal experiment, running manners was the key factor that determined removal of diesel by LAS, but the key factor of Triton X-100 was surfactant concentration.
作者 支银芳 陈家军 杨官光 尉斌 ZHI Yin-fang, CHEN Jia-jun, YANG Guan-guang, WEI Bin (State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Beijing Normal University, Beijing 100875, China)
出处 《农业环境科学学报》 CAS 北大核心 2006年第2期 354-358,共5页 Journal of Agro-Environment Science( J. Agro-Environ. Sci.)
基金 国家自然科学基金资助项目(40272107)
关键词 土壤油污染 表面活性剂冲洗 正交对比试验 soil polluted by oil surfactant flushing contrast orthogonal test
作者简介 支银芳(1978-)女,在读博士研究生,研究方向为环境模拟与污染治理。E-mail:yfzhi2003@126.com
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参考文献6

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二级参考文献2

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