| 诺氟沙星的土壤吸附热力学与动力学研究 |
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| 引用本文： | 张劲强,董元华.诺氟沙星的土壤吸附热力学与动力学研究[J].土壤学报,2008,45(5):978-986. |
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| 作者姓名： | 张劲强 董元华 |
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| 作者单位： | 土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所),南京 210008;中国科学院南京土壤研究所-香港浸会大学土壤与环境联合开放实验室,南京 210008;中国科学院研究生院,北京 100049 |
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| 基金项目： | 国家自然科学基金，中国科学院知识创新工程项目，国家科技支撑计划，江苏省自然科学基金 |
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| 摘 要： | 采用批平衡吸附试验研究了诺氟沙星在河南封丘潮土、江西鹰潭红壤、苏南常熟水稻土和南京黄棕壤等4种土壤中的吸附热力学和动力学行为。结果表明,诺氟沙星在4种供试土壤的Fruendlich吸附参数值Kf随温度升高(15℃、25℃和35℃)而减小;在低土壤溶液pH下诺氟沙星的吸附焓变值△H°较大,而高pH下则较小。用氢氧化钠或盐酸溶液分别调节红壤pH从5.20到8.00,水稻土pH从6.14至8.20,黄棕壤pH从7.78至5.80和潮土pH从8.08至5.90,其△H°与pH之间的关系同样呈现如上关系。这证实4种土壤对诺氟沙星的吸附作用力差异较大。低pH(5.20~6.14)下,诺氟沙星在土壤中的吸附以离子交换和氢键等为主;而高pH(7.78~8.20)下,则以相对较弱的范德华力、疏水作用等为主。诺氟沙星的土壤吸附过程迅速达到平衡,其反应动力学用Elovich方程和双常数方程拟合结果最好。
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| 关 键 词： | 诺氟沙星 吸附 土壤 热力学 动力学 |
| 收稿时间： | 2007/5/17 0:00:00 |
| 修稿时间： | 2007/9/21 0:00:00 |
THERMODYNAMICS AND KINETICS OF NORFLOXACIN ADSORPTION IN TYPICAL SOILS OF CHINA |
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| Zhang Jinqiang and Dong Yuanhua.THERMODYNAMICS AND KINETICS OF NORFLOXACIN ADSORPTION IN TYPICAL SOILS OF CHINA[J].Acta Pedologica Sinica,2008,45(5):978-986. |
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| Authors: | Zhang Jinqiang and Dong Yuanhua |
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| Institution: | Zhang Jinqiang1,2,3 Dong Yuanhua1,3 (1 State Key Laboratory of Soil , Sustainable Agriculture,Institute of Soil Science,Chinese Academy of Sciences,Nanjing 210008,China) (2 Institute of Soil Science,Chinese Academy of Sciences-Hong Kong Baptist University(ISSAS-HKBU) Joint Open Laboratory on Soil , Environment,China) (3 Graduate School of Chinese Academy of Sciences,Beijing 100049,China) |
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| Abstract: | Batch equilibrium experiments(OECD Guideline 106) were conducted to study thermodynamics and kinetics of norfloxacin(NOR) adsorption in four kinds of soils,namely Ustic Cambosols collected from Fengqiu of Henan,Ali-Perudic Ferrosols collected from Yingtan of Jiangxi,Gleyic-Stagnic Anthrosols collected from Changshu and Udic Argosols collected from Nanjing of Jiangsu.Results show that mechanism of NOR sorption in the four tested soils is controlled to a certain extent by pH of soil solution.With rising tempe... |
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| Keywords: | Norfloxacin Adsorption Soil Thermodynamics Kinetics |
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