摘要
采用静态吸附实验研究不同理化性质的土壤对溶液中柴油的吸附行为。结果表明:不同理化性质的土壤对柴油的吸附均可以在24 h内达到平衡,准二级动力学模型(R~2为0.92~1.00)能更好地描述土壤对柴油的吸附动力学数据,吸附过程以化学吸附为主,液膜扩散和颗粒内扩散共同影响吸附反应的控速步骤。吸附等温线符合Langmuir模型,表明柴油在土壤中的吸附为单分子层吸附,近似于不可逆型吸附。被石油污染的场地土对水体中柴油的吸附量小于未被污染的林地土,土壤对液相中柴油的吸附量与有机质含量呈正相关,并随着土壤粒径和pH的减小而逐渐增大。
The static adsorption experiment was conducted to study the adsorption behavior of diesel oil in water by soil with different physicochemical properties.The results showed that the adsorption kinetics of diesel oil on soils with different physical and chemical properties could reach equilibrium within 24 h.The quasi-second-order kinetic model(R 2 was 0.92-1.00)could better describe the adsorption kinetics of diesel oil on soils.The adsorption process was dominated by chemical adsorption.The adsorption isotherm was consistent with the Langmuir isotherm adsorption model,indicating that the adsorption of diesel oil on soil was monolayer adsorption,which was similar to irreversible adsorption.The amount of diesel oil adsorbed by oil polluted soil was less than that by unpolluted forest soil.The amount of diesel oil adsorbed by soil in water was positively correlated with the content of organic matter,and gradually increased with the decrease of soil particle size and pH.
作者
张天琦
黄岁樑
李玲
郭智
李高成
ZHANG Tianqi;HUANG Suiliang;LI Ling;GUO Zhi;LI Gaocheng(Key Laboratory of Pollution Processes and Environmental Criteria of the Ministry of Education,Tianjin Key Laboratory of Urban Ecological Environment Restoration and Pollution Prevention,College of Environmental Science and Engineering,Nankai University,Tianjin 300071)
出处
《环境污染与防治》
CAS
CSCD
北大核心
2024年第4期513-518,524,共7页
Environmental Pollution & Control
基金
国家重点研发计划项目(No.2020YFC1808804)。
关键词
柴油
吸附动力学
吸附等温线
影响因素
diesel oil
adsorption kinetics
adsorption isotherm
influencing factor
