Efect of dissolved organic matter on sorption and desorption of phenanthrene onto black carbon

作     者：Jinghuan Zhang Mengchang He 

作者机构：State Key Joint Laboratory of Environment Simulation and Pollution ControlBeijing Normal University School of EnvironmentBeijing Normal University College of Environment and Safety EngineeringQingdao University of Science and Technology 

出 版 物：《Journal of Environmental Sciences》 (环境科学学报（英文版）)

年 卷 期：2013年第25卷第12期

页      面：2378-2383页

核心收录：

学科分类：07[理学] 09[农学] 0903[农学-农业资源与环境] 0713[理学-生态学] 

基　　金：The study was supported by the National Science Foundation for Innovative Research Group(No.51121003) the Major Science and Technology Program for Water Pollution Control and Treatment(No.2012ZX07202002) the Open Foundation of State Key Joint Laboratory of Environment Simulation and Pollution Control(Beijing Normal University)(No.10K05ESPCN) 

主　　题：DOM black carbon phenanthrene sorption desorption 

摘      要：Sorption and desorption of phenanthrene （PHE） onto black carbon （BC） extracted from sediments were studied in the presence of three types of dissolved organic matter （DOM）, including L-phenylalanine （L-PH）, peptone and citric acid. The nonlinearity of the sorption isotherms increased in the presence of DOM. The presence of L-PH reduced the sorption capacity and desorption hysteresis because of the solubilization of PHE in L-PH solution. Peptone at 50-500 mg/L also led to a decrease in sorption attributed to solubilization, although the sorbed peptone on the BC surface could slightly increase PHE sorption. Unlike L-PH and peptone, citric acid enhanced the sorption capacity and irreversibility of PHE on BC mainly due to the strong sorption of citric acid on the BC surface. Our results may help to understand the different impacts of DOM on the distribution and transport of PAH in the environment.