摘要
为了调查垃圾渗滤液中的溶解有机质(DOM)及内分泌干扰物(EEDs)的相互作用机理,在实验室条件下研究了DOM对EEDs如双酚A(BPA)、雌二醇(E2)和雌酮(E1)的吸附等温线,并通过FTIR、1HNMR和ESR技术,分析了DOM与EEDs的吸附机理.结果表明,垃圾渗滤液中DOM对3种EEDs的吸附等温线符合Freundlich方程,并且可用DOM与EEDs的吸附常数Kf预测EEDs的辛醇/水分配系数(Kow)或有机碳分配系数(Kdoc),其中直线回归方程为:lgKdoc=2.062Kf-5.065(R2=0.9958,P=0.041<0.05).分析也表明DOM吸附EEDs的吸附过程至少存在离子键、共价键和电荷转移等多种吸附机制的协同作用.
To understand the interactions between dissolved organic matter （DOM） and environmental endocrine disruptors （EEDs） in landfill leachate, sorption experiments and the interaction between targets EEDs, including BPA, E2 , E1 , and DOM from leachate were investigated. It was found that adsorption isotherms fit the Freundlich equation well. The regression equation between binding coefficient, K1, and the logarithm value of Kow or Kdoc of compounds was determined （R^2 = 0. 995 8, P= 0. 041〈0. 05）. Both the unreacted DOM and the DOM that reacted with EEDs were analyzed by FTIR, ^1HNMR and ESR. The results suggested that multiple binding mechanisms might occur simultaneously in the adsorption process with the formation of （1） ionic bonds （proton-transfer） between earboxylate groups of DOM and positively charged compounds; （2） hydrogen bonds between structure moieties of EEDs and DOM; and （3） charge-transfer bonds in electron donor-acceptor processes.
出处
《地球科学（中国地质大学学报）》
EI
CAS
CSCD
北大核心
2008年第3期399-404,共6页
Earth Science-Journal of China University of Geosciences
基金
国家杰出青年科学基金(No.40425001)
关键词
渗滤液
溶解有机质
内分泌干扰物
吸附等温线
吸附机理
landfill leachate
dissolved organic matter （DOM）
environmental endocrine disruptors （EEDs）
adsorption isotherm
adsorption mechanisms.
