摘要
为了得到事故场地硝基苯(NB)污染地下水的应急处理方案,通过静态实验研究了地下水中初始NB浓度为100 mg·L^(-1)和300 mg·L^(-1),pH值为3时,H_2O_2与NB质量比p、H_2O_2与Fe(Ⅱ)质量比q对氧化效果的影响。结果表明:当q为20,p为1~6时,NB降解率和降解速率随p的增大而增大;当p为3,q为5~20时,NB降解速率随q的增大而减小。根据氧化处理后水中B/C值判断,当p大于2时,出水可排入污水生物处理系统进行后续处理。动力学分析表明,p、q值与NB降解的伪一阶反应速率常数k0存在较强的线性关系,R2>0.95,p的影响程度大于q。根据事故场地NB污染地下水快速处理所要求的NB的去除率和去除时间,给出了高浓度NB污染地下水处理适宜的Fenton投加方案。
Fenton was prepared to treat nitrobenzene（ NB） at 100 mg·L-1and 300 mg·L-1in groundwater by static experiments,at pH of 3. For the emergency treatment of NB-contaminated groundwater at an environmental accident site,the influence of p（ mass ratio of H-2O_2 and NB） and q（ mass ratio of H_2O_2 and Fe（ II）） on the NB treatment effect was studied. The degradation efficiency and degradation rate of NB increased with the increase of p（ 1≤p≤6）,while for q it was 20. The degradation rate of NB decreased with the increase of q（ 5≤q≤20）,while for p was 3. The B / C of the treated groundwater indicated that the water could be discharged into the biological wastewater treatment system for post-treatment when p was larger than 2. Kinetic analysis showed a strong linear relationship between p,q,and k_0,the pseudo-first-order reaction rate constant of NB degradation.Furthermore,the influence of p on k_0 was larger than that of q on k_0. Suitable Fenton treatment for high concentrations of NB-contaminated groundwater could be suggested,according to the requested degradation efficiency and the degradation rate of NB for the rapid treatment of NB-contaminated groundwater at an environmental accident site.
出处
《环境工程学报》
CAS
CSCD
北大核心
2016年第7期3439-3444,共6页
Chinese Journal of Environmental Engineering
基金
国家高技术研究发展计划(863)项目(2013AA06A207)
