石油污染土壤淋洗配方的比选  

Compounding of a Combinable Surfactant for Oil-Contaminated Soil Washing

作　　者：李诗殷[1] 宁小兵[1] 蔡信德[1] 詹重贵[1] 

机构地区：[1]环境保护部华南环境科学研究所,广东广州510655

出　　处：《环境科学与技术》2011年第1期75-78,共4页Environmental Science & Technology

基　　金：全国土壤现状调查及污染防治项目(1440800011);环境保护部项目(200809093)

摘　　要：以广州市某废弃工业场地的石油污染土壤为研究对象,采用室内模拟试验的方法,考察了不同的pH、淋洗液配方、淋洗时间、以及土柱淋洗流量等因素对石油污染土壤淋洗修复效果的影响;并利用一级反应动力学模型对试验数据进行拟合。结果表明pH=8时水溶液对油的解吸量最大;最优淋洗液配方为5(曲拉通):10(木素钠):42(硅酸钠):43(碳酸钠)。土柱淋洗效果与淋洗液使用量有较大关系,在0.40 mL/min用量时,96 h的除油率为29.3%,土壤中石油的含量由32 273 mg/kg下降至22 820 mg/kg。This paper reports a lab-scaled experiment intended to develop an efficient surfactant for oil-contaminated soil remediation,focusing on selecting an optimal combinable surfactant formula.The washing of contaminated-soil packed in PVC columns is conducted by solutions containing the surfactants,and an empirical model is employed to describe the oil desorption from the soil.The experiment indicates that the best compounding of surfactant as 5% of triton,10% of sodium lignosulfonate,42% sodium silicate,43% of sodium carbonate,and oil-washing rate attains to 29.3% under the condition of continuous 96 hour washing and 0.4 mL/min of washing rate.

关 键 词：石油污染土壤 复配表面活性剂 淋洗 解吸 

分 类 号：X131.3[环境科学与工程—环境科学]