Natural attenuation characteristics and comprehensive toxicity changes of C9 aromatics under simulated marine conditions  

作　　者：Dawei Li Jiangyue Wu Jiaqi Liu Aifeng Li Fanping Meng 

机构地区：[1]Key Laboratory of Marine Environment and Ecology,Ministry of Education,Ocean University of China,Qingdao 266100,China [2]College of Environmental Science and Engineering,Ocean University of China,Qingdao 266100,China [3]National Marine Hazard Mitigation Service,Ministry of Natural Resource of the People’s Republic of China,Beijing 100194,China

出　　处：《Journal of Environmental Sciences》2021年第11期26-35,共10页环境科学学报（英文版）

基　　金：supported by the National Natural Science Foundation of China(No.42077335).

摘　　要：Microcosmic experiments were performed under a simulated marine environment to investigate the natural attenuation of C9 aromatics using nine components(propylbenzene,isopropylbenzene,2-ethyltoluene,3-ethyltoluene,4-ethyltoluene,1,2,3-trimethylbenzene,1,2,4-trimethylbenzene,1,3,5-trimethylbenzene,and indene).This research aims to assess the contribution of biodegradation and abiotic activity to total attenuation of C9 aromatics and ascertain the changes in the comprehensive toxicity of seawater in the natural environment.The process of natural attenuation indicates the agreement with pseudo-first-order kinetics for all nine components in microcosmic experiments.The half-lives of the nine main compounds in C9 aromatics ranged between 0.34 day and 0.44 day under optimal conditions.The experiments showed that the natural attenuation of nine aromatic hydrocarbonsmainly occurred via abiotic processes.Seawater samples significantly inhibited the luminescence of P.phosphoreum(the luminescence inhibition ratio reached 100%)at the beginning of the experiment.In addition,the toxicity declined slowly and continued for 25 days.The attenuation kinetics and changes in toxicity could be applied to explore the natural attenuation of C9 aromatics in the marine environment.

关 键 词：C9 aromatics Reaction kinetics MARINE MICROCOSM Toxicity changes 

分 类 号：X171.5[环境科学与工程—环境科学] X55