农业环境科学学报2011，Vol.30Issue(9)：1847-1852,6.
多环芳烃污染土壤表面活性剂清洗及生物柴油强化
Washing of Polycyclic Aromatic Hydrocarbon Contaminated Soil Using Single and Mixed Surfactants and Removal Enhancement by Biodiesel
摘要
Abstract
Single and mixed surfactants were used in this study as solubilization agents for remediation of soils contaminated with high concentrations of polycyclic aromatic hydrocarbons(PAHs), and the effect of biodiesel on PAH removal by using single and mixed surfactants was also evaluated. A coking plant soil from Beijing with total PAH concentration of 190.6 mg·kg-1 was washed using alkylpolyglucosides (APG), sodium dodecylbenzene sulfonate(SDBS), Triton X-100(TX100), and their binary mixtures at different ratios as representative surfactants. Soil washing experiments were conducted in glass bottles with the soil and solubilization agents( 1% surfactant, with or without 2% biodiesel) at ratio of 1:5 (W/V), and individual and total PAHs in the solubilization agents were analyzed by high performance liquid chromatography. The order of total PAH removals from the coking plant soil using single surfactant was SDBS>APG>TX100, and the removals were(62.4±9.0)%, (55.4±1.5)% and (34.5±3.6)% respectively. A synergistic effect for PAH removal from the contaminated soil was observed for APC/SDBS and TX100/SDBS mixtures, as the PAH removals by these mixtures were higher than those calculated by using same amount of single corresponding solubilization agent, whereas APG/TX100 mixture did not show this synergistic effect. Among these solubilization systems, APG/SDBS mixture at ratio of 9:1 showed the highest total PAH removal of (63.3±2.0)%. Phenanthrene and indenopyrene showed the first two highest removals among individual PAH removals by the single surfactant systems. Total PAH removal from the contami-nated soil was increased from (63.3±2.0)% to (75.6±2.0)% when 2% biodiesel was added to the APG/SDBS mixture at ratio of 9:1, showing that biodiesel had a good potential to improve PAH removal efficiency while using surfactant mixture. Similar to the APG/SDBS mixture, this solubilization system also demonstrated highest removals of phenanthrene and indenopyrene, (86.9±1.6)% and (67.5±17.0)% respectively. Thus the solubilization system containing APG/SDBS mixture and biodiesel was suggested in this study for remediation of industrial soils with high concentrations of PAHs.关键词
表面活性剂/混合表面活性剂/多环芳烃/土壤/生物柴油Key words
surfactant/ mixed surfactant/ polycyclic aromatic hydrocarbons/ soil/ biodiesel分类
资源环境引用本文复制引用
毛华军,巩宗强,方振东,金京华,杨辉,杨琴,孙翼飞..多环芳烃污染土壤表面活性剂清洗及生物柴油强化[J].农业环境科学学报,2011,30(9):1847-1852,6.基金项目
国家高技术研究发展计划“863”项目(2008AA069331) （2008AA069331）
国家自然科学基金面上项目(20707030) （20707030）
