餐厨废弃物腐殖化过程对土壤中硝基苯降解的影响  

THE IMPACT OF HUMIFICATION PROCESS OF KITCHEN WASTE ON DEGRADATION OF NITROBENZENE IN SOIL

作　　者：胡浩[1,2] 宋彩红[2] 李娟[2] 吕宁罄 席北斗[2] 李定龙[1] 贾璇[2] 李鸣晓[2] 

机构地区：[1]常州大学环境与安全工程学院,江苏常州213100 [2]中国环境科学研究院国家环境保护地下水污染模拟与控制重点实验室,北京100012

出　　处：《环境工程》2015年第9期148-152,共5页Environmental Engineering

基　　金："村镇简易垃圾填埋场环境风险;污染评估及控制;修复再利用技术研究"(2014BAL02B03-2)

摘　　要：为研究城市废弃物腐殖化过程对土壤硝基苯的降解效果,采用餐厨废弃物为原料,并添加受硝基苯污染的土壤进行堆肥,研究了腐殖化过程中硝基苯的降解情况以及C/N、Eh与硝基苯降解的关系,并对腐殖化过程中多个理化指标与硝基苯的降解进行了相关性分析。结果表明:经过32 d堆肥,硝基苯含量由69.8 mg/kg降解到5.4 mg/kg,降解率达到92.3%;其中硝基苯含量经过10 d处理已经达到了美国场地修复住宅用地标准的20 mg/kg。硝基苯的降解符合一级动力学方程(T1:R2=0.8860;T2:R2=0.9656)。相关性分析结果表明:Eh与土壤硝基苯的降解率在0.05水平上显著相关,Eh与体系的p H值显著相关,堆肥体系氧化性越高硝基苯相对降解速率越快,其中降解硝基苯的主要为好氧微生物,其降解过程最可能是JS765的氧化途径,堆肥在降解硝基苯方面有较大应用潜力。To explore the degrading effect of soil nitrobenzene in the course of humification process of urban waste,cocomposting of kitchen waste and the nitrobenzene（ NB） contaminated soil was conducted. Degradation rate of NB and the change of several physico-chemical indexes during the humification process were determined. In addition,the relationship between degradation rate of NB,C / N as well as Eh was also studied by correlation analysis. The results showed that the NB concentration decreased from the initial value of 69. 8 mg / kg to 5. 4 mg / kg,and the degradation rate of NB was 92. 3% after32 days of composting. The NB concentration of the compost reached the U. S. Residential Land Site Remediation Standard（ 20 mg/kg） after 10 days of composting treatment. The degradation of NB met the first-order kinetic equation（ T1： R^2=0. 8860; T2： R^2= 0. 9656）. The correlation analysis showed there was a significant correlation between Eh and degradation rate of NB at the 0. 05 level. Eh also exhibited a significant correlation with p H of the system. The high oxidability was conducive to the degradation of NB. Aerobic microorganisms in composting system were mainly responsible for the degradation of NB.The degradation of NB proceeded mainly by the oxidative pathway JS765,therefore,composting has great potential in degrading soil NB.

关 键 词：餐厨废弃物 堆肥 土壤修复 硝基苯 

分 类 号：X53[环境科学与工程—环境工程]