摘要
采用紫外和红外光谱对不同填埋年限生活垃圾的富里酸(fulvic acid,FA)的结构组成和官能团变化进行分析,并对不同填埋阶段富里酸(FA)的电子转移能力和其对五氯苯酚(pentachlorophenol,PCP)的降解能力进行研究.结果表明,以S.oneidensis MR-1作电子供体,同时添加不同阶段填埋富里酸作电子穿梭体可以显著提高PCP的降解率,降解率能达到80%以上.不同填埋阶段富里酸对PCP的降解有不同的还原转化能力的原因是氧化还原性质存在差异.填埋富里酸具有PCP还原转化能力又归因于其具有电子转移能力,这些功能都利于促进PCP还原脱氯.而填埋富里酸电子转移特性主要源于其结构中含有的电子转移功能基团,其中羟基和羧基是填埋过程富里酸分子中重要的活性官能团,其含量高低将影响PCP还原脱氯效率.
The structural composition and functional group changes in fulvic acid （FA） at various landfills were studied using ultraviolet and infrared spectroscopy. The electron transfer ability of FA and its ability to degrade pentachlorophenol （PCP） were also studied considering the various landfills. The results showed that the use of MR-1 as an electron donor and the simultaneous addition of fulvic acid in different stages as an electron shuttle can significantly increase the degradation rate of PCP, leading it beyond 80%. Due to the different redox properties of fulvic acid at the different landfill stages, the degradation of PCP has different reduction conversion abilities. Landfill fulvic acid is able to reduce and transform PCP because of its electron transfer ability. These functions are all conducive to promoting PCP reductive dechlorination.
作者
刘思佳
何小松
张慧
祖国峰
席北斗
李丹
党秋玲
LIU Si-jia;HE Xiao-song;ZHANG Hui;ZU Guo-feng;XI Bei-dou;LI Dan;DANG Qiu-ling(College of Environmental Science and Engineering,Guilin University of Technology,Guilin 541006,China;State Key Laboratory of Environment Criteria and Risk Assessment,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;State Environment Protection Key Laboratory of Simulation and Control of Groundwater Pollution,Chinese Research Academy of Environmental Sciences,Beijing 100012,China;Zhongguancun Central Groundwater Pollution Control and Restoration Industry Alliance,Beijing 100012,China)
出处
《环境科学》
EI
CAS
CSCD
北大核心
2018年第12期5699-5707,共9页
Environmental Science
基金
北京市自然科学基金项目(8182057)
