Dissipation of chlorpyrifos, pendimethalin, and thiophanate-methyl pesticides in compost based-versus peat-moss based-biomixture of biobeds  

作　　者：Talaat N.M.El-Sebai Wafaa M.H.Zidan Alaa Marzouk Marion Divers Fabrice Martin-Laurent 

机构地区：[1]Agricultural Microbiology Dept.Agricultural and Biology Research Institute,National Research Centre,Cairo,Egypt [2]Laboratory of Pesticide Analysis,Agriculture Research Centre,Cairo,Egypt [3]Laboratory of Soil Microbiology,National Institute of Agricultural Research,Dijon,France

出　　处：《Waste Disposal and Sustainable Energy》2023年第4期461-470,共10页废弃物处置与可持续能源（英文）

基　　金：support provided by a joint research program financed by the Academy of Scientific Research and Technology(ASRT),Egypt and the Ministry of Foreign Affairs and International Development,the Ministry of Higher Education and Research,France.

摘　　要：Biobed is a smart bioremediation system used to treat point-source pesticide contamination.Biomixture is the main component of biobeds,and pesticide dissipation is affected by its composition.This study aimed to compare the effectiveness of compost-based(C)versus peat-moss-based(P)biomixtures of biobeds on tested pesticide dissipation.Three concentrations(25,50,and 75 mg/kg)of chlorpyrifos,pendimethalin,and thiophanate methyl were added separately and as a mix to both biomixtures C and P.Our data showed the effect of biomixture type on the dissipation of the tested pesticides.For chlorpyrifos,its dissipation rate in biomixture P was more rapid than that in biomixture C.This result was confirmed by the mineralization kinetic experiment,since 25%of the initial ^(14)C-chlorpyrifos concentration accumulated in the form ^(14)CO_(2) in biomixture P compared to only 14%in biomixture C.In addition,the chlorpyrifos dissipation rate was influenced by the initial concentration when applied individually in biomixture P.In contrast,biomixture C was more effective at pendimethalin dissipation than biomixture P,since>76%of pendimethalin was dissipated in biomixture C versus 67%in biomixture P at the same incubation time.For thiophanate-methyl,the abilities of both biomixtures C and P were similar and less efficient than those of the other tested pesticides.The addition of the three tested pesticides to biomixture C only had a positive effect on both chlorpyrifos and thiophanate-methyl dissipation,while pendimethalin dissipation was similar when applied separately or as a mix.Microbial activity was stimulated by the addition of separately or mixed pesticides to biomixtures C and P as measured by dehydrogenase activity.

关 键 词：Biopurification system PESTICIDES Contamination POINT-SOURCE Bioremediation Biomixture 

分 类 号：X17[环境科学与工程—环境科学]