| 四环素类抗生素在土壤和堆肥中的吸附和降解 |
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| 作者姓名： | LI Ling-Ling HUANG Li-Dong CHUNG Ren-Shih FOK Ka-Hang ZHANG Yong-Song |
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| 作者单位： | LI Ling-Ling,HUANG Li-Dong,ZHANG Yong-Song(Ministry of Education Key Laboratory of Environmental Remediation and Ecosystem Health,College of Natural Re-sources and Environmental Science,Zhejiang University,Hangzhou 310029(China));CHUNG Ren-Shih,FOK Ka-Hang(Department of Agricultural Chemistry,National Taiwan University,Taipei 10617(China)) |
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| 基金项目： | *1Supported by the Major Research Program of Zhejiang Province, China (No.2008C12061-1) and the National Key Technologies R&D Program of China during the 11th Five-Year Plan (Nos.2006BAD05B03 and 2008BADA6B02). |
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| 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 ℃ in soils and soil/compost mixtures in the dark, TCs elapsed in all substrates, with the time required for 50% degradation (DT50) between 20 and 41 d, and the time for 90% degradation (DT90) 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.
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| 关 键 词： | antibiotics half-life mobility organic carbon soil amendment |
| 收稿时间： | 19 May 2010 |
Sorption and dissipation of tetracyclines in soils and compost |
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| LI Ling-Ling,HUANG Li-Dong,CHUNG Ren-Shih,FOK Ka-Hang,ZHANG Yong-Song.Sorption and dissipation of tetracyclines in soils and compost[J].Pedosphere,2010,20(6):807-816. |
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| Authors: | LI Ling-Ling HUANG Li-Dong CHUNG Ren-Shih FOK Ka-Hang and ZHANG Yong-Song |
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| Institution: | Institute of Tea Science, Nanjing Agriculture University, Nanjing 210095 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China).;College of Food and Bioengineering, Henan University of Science and Technology, Luoyang 471003 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences, Nanjing 210008 (China);Institute of Tea Science, Nanjing Agriculture University, Nanjing 210095 (China) |
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| Abstract: | Soil acidification is an important process in land degradation around the world as well as in China. Acidification of Alfisols was investigated in the tea gardens with various years of tea cultivation in the eastern China. Cultivation of tea plants caused soil acidification and soil acidity increased with the increase of tea cultivation period. Soil pH of composite samples from cultivated layers decreased by 1.37, 1.62 and 1.85, respectively, after 13, 34 and 54 years of tea plantation, as compared to the the surface soil obtained from the unused land. Soil acidification rates at early stages of tea cultivation were found to be higher than those at the later stages. The acidification rate for the period of 0--13 years was as high as 4.40 kmol H+ ha-1 year-1 for the cultivated layer samples. Soil acidification induced the decrease of soil exchangeable base cations and base cation saturation and thus increased the soil exchangeable acidity. Soil acidification also caused the decrease of soil cation exchange capacity, especially for the 54-year-old tea garden. Soil acidification induced by tea plantation also led to the increase of soil exchangeable Al and soluble Al, which is responsible for the Al toxicity to plants. |
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| Keywords: | aluminum base cations cation exchange capacity tea garden soil exchangeable acidity |
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