摘要
本文通过室内模拟实验,探讨在河流入渗补给地下水的条件下,硝基苯在含水层中的迁移规律及其转化机理。迁移规律实验结果表明,从进水口至出水口的各取样点依次出现硝基苯浓度峰值,并且随着硝基苯迁移路径的延长其浓度峰值相应变小。硝基苯的浓度峰值在含水介质中的持续时间并不很长,但由于硝基苯解吸附作用的存在,在此后相当长的一段时间里都存在较为明显的拖尾现象。转化机理实验结果表明,吸附与生物降解作用是影响硝基苯在含水层中迁移转化的主要因素。淤泥介质对硝基苯的吸附能力要明显大于砂砾介质,淤泥介质中的微生物对硝基苯的吸附影响较大,而砂砾介质中的微生物对硝基苯的吸附影响较小。
Based on simulated experiment research, this paper discussed the migration rules and transformation mechanism of ni- trobenzene in aquifer under the condition of groundwater recharged by river. The results of migration rules experiment indicate that the peak value of nitrobenzene＇s concentration appear in turn and decrease along with its migration path; the duration of the con- centration＇s peak value is not too long, but it has an obvious tailing phenomenon in a quite long time since nitrobenzene＇s con- centration has drawn down to a certain degree, according to its desorption. The results of transformation mechanism experiment in- dicate that adsorption and biodegradation actions are the main effecting factors in this study; the adsorption capability of nitroben- zene transporting in silt medium is better than that in sand medium. In addition, the effects of microorganism in silt medium are more than that in sand medium during nitrobenzene＇s transport and fate in aquifer.
出处
《水文》
CSCD
北大核心
2007年第4期1-4,9,共5页
Journal of China Hydrology
基金
教育部博士点基金项目资助(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
迁移规律
转化机理
nitrobenzene
aquifer
migration rules
transformation mechanism
