A zero-valent iron and organic matter mixture enhances herbicide and herbicide degradation product removal in subsurface waters

作     者：Kaisa Kerminen Ville Salovaara Merja Hannele Kontro 

作者机构：University of HelsinkiDepartment of Ecological and Environmental Sciences15140 LahtiFinland 

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

年 卷 期：2017年第29卷第7期

页      面：411-417页

核心收录：

学科分类：0830[工学-环境科学与工程（可授工学、理学、农学学位）] 082803[工学-农业生物环境与能源工程] 08[工学] 0828[工学-农业工程] 

基　　金：supported by Maj and Tor Nessling Foundation(2014511) the Ministry of Agriculture and Forestry of Finland(310442) Maa-ja Vesitekniikan Tuki Ry,Lahti Aqua Ltd,Finnish Cultural foundation:Paijat-Hame Regional Fund Erkki Paasikivi Foundation Finnish Water Utilities Association,Kolli Foundation(1054) Onni and Hilja Tuovinen Foundation 

主　　题：Herbicides Subsurface sediments Dissipation EHC~ Organic matter Zero-valent iron 

摘      要：The pesticide atrazine,its degradation products,and 2,6-dichlorobenzamide（BAM） are persistent in groundwater *** studied whether their dissipation can be enhanced with a mixture of a complex carbon source and zero-valent iron（ZVI） called EHC.The application rates were 1.0% and 2.0%（by weight） in subsurface sediments slurries（atrazine 30 mg/L）,and 2.0% in 1.5 m pilot-scale sediment columns with groundwater flowing through（atrazine 0.08,desethylatrazine DEA 0.03,BAM 0.02 μg/L）.In the slurries under aerobic conditions,atrazine of 0.88 ± 0.14 mg/g of EHC was dissipated chemically,as concentrations did not differ significantly between the slurries and their sterilized *** degradation occurred in the slurries under anaerobic *** the pilot-scale columns under water-saturated conditions,atrazine,DEA and BAM were not detected in effluents during 33,64 and 64 days from the beginning of the water flow through EHC columns,respectively,but thereafter traces of compounds could be *** atrazine or degradation products（BAM,DEA,deisopropylatrazine,desethyldeisopropylatrazine） could be extracted from the column sediments at the end of the *** a result,the sum of dissipated pesticides was about7.6 μg/g of EHC in columns under water-saturated conditions,and 0.88 mg/g of EHC in slurries under aerobic *** can be used to enhance the dissipation of studied pesticides in small quantities,preferentially under aerobic conditions.