Sorption and Dissipation of Tetracyclines in Soils and Compost

查看全文 作　　者：LI Ling-[1]Ling;HUANG Li-[1]Dong;CHUNG Ren-[2]Shih;FOK Ka-[2]Hang;ZHANG Yong-[1]Song

机构地区：[1]Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health, College of Natural Resources and Environmental Science, Zhejiang University, Hangzhou 310029 (China);[2]Department of Agricultural Chemistry, National Taiwan University, Taipei 10617 (China)

出　　处：《Pedosphere》索引2010年第20卷第6期,共10页

基　　金：Supported by the Major Research Program of Zhejiang Province,China (No. 2008C12061-1);the National Key Technologies R&D Program of China during the 11th Five-Year Plan (Nos. 2006BAD05B03 and 2008BADA6B02) 摘　　要：Two agricultural soils were collected from Dahu and Pinchen counties and swine manure compost (SMC) from Ping- tung County in Taiwan,China to investigate the sorption and dissipation of three tetracyclines (TCs),i.e.,oxytetracycline (OTC),tetracycline (TC) and chlortetracycline (CTC),in compost,soils and soil/compost mixtures with different organic carbon (OC) contents.There were seven treatments in total.TCs were most strongly adsorbed to SMC in all treatments due to the high OC content.When SMC was present in the soils,the sorption of TCs was significantly enhanced,which might be attributed to the increased OC content and CEC.The adsorption of TCs showed non-linear adsorption isotherms and fitted well to the Freundlich model.After 49 d of incubation at 25 ? C in soils and soil/compost mixtures in the dark,TCs elapsed in all substrates,with the time required for 50% degradation (DT 50 ) between 20 and 41 d,and the time for 90% degradation (DT 90 ) between 68 and 137 d.Soil amended with compost enhanced the stability of TCs and reduced their mobility.The dissipation of TCs in a soil environment was slow,indicating that these compounds might be persistent in soil. 关键词：吸附等温线农业土壤四环素耗散 FREUNDLICH模型猪粪堆肥热带气旋 TCS

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Sorption and Dissipation of Tetracyclines in Soils and Compost

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