摘要
通过室内模拟实验,确定了影响硝基苯在含水层中迁移转化的主要因素,并采用解析解方法计算出各因素的影响水平。研究表明,硝基苯在淤泥介质中的吸附能力大于砂砾介质,其在淤泥介质中的阻滞系数为2.22,在砂砾介质中的阻滞系数为1.74。根据一级动力学方程计算得出,硝基苯在淤泥介质中的自然衰减总速率常数为0.063 5/h,在砂砾介质中的自然衰减总速率常数为0.0059/h。而且,不论是在淤泥介质还是在砂砾介质中,生物降解作用均是硝基苯迁移转化过程的主要影响因素,其影响水平占硝基苯自然衰减能力的50%左右。
Based on results of simulated experiment, it can determine the main effect factors of nitro- benzene＇s transport and fate, as well as effect degree of these factors by analytic method. The study has indicated that the adsorption capability of nitrobenzene transporting in silt medium is better than that in sand medium. The retardation coefficients are 2.22 and 1.74 of silt medium and sand medium respectively. According to first-order reaction, nitrobenzene＇s total natural attenuation rates constant are 0. 063 5/h and 0. 005 9/h respective of silt medium and sand medium. However, biodegradation is the most important factor in the process of nitrobenzene＇s migration and transformation, and its effect degree can reach about 50% account for the total natural attenuation capability in either silt medium or sand medium.
出处
《吉林大学学报（地球科学版）》
EI
CAS
CSCD
北大核心
2007年第2期346-349,共4页
Journal of Jilin University：Earth Science Edition
基金
教育部博士点基金项目(20030027020)
国土资源部水资源与水环境重点实验室(原地质矿产部水资源评价与管理系列模型开放研究实验室)资助
关键词
硝基苯
含水层
迁移转化
影响因素
nitrobenzene
aquifer
transport and fate
effect factors
