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当前位置: 首页 > 文章 > 磷对塿土吸附四环素的影响 农业环境科学学报 2012,31 (12) 2397-2401
Position: Home > Articles > Effect of Phosphorus on the Tetracycline Adsorption by Loess Soils Journal of Agro-Environment Science 2012,31 (12) 2397-2401

磷对塿土吸附四环素的影响

作  者：
刘婷;吴鹍;岳海营
单  位：
西北农林科技大学资源环境学院;西安建筑科技大学环境与市政工程学院;农业部西北植物营养与农业环境重点实验室
关键词：
四环素;磷;塿土;吸附
摘  要：
本文研究了复合污染条件下磷对塿土吸附四环素的影响。研究结果表明,磷的存在降低了塿土对四环素的吸附量;而且,磷存在时塿土对四环素的吸附速率有所增加。在25℃,pH=7的条件下,塿土对四环素的吸附等温线数据更符合Langmuir模型,单一及复合污染条件下,塿土对四环素的最大吸附量分别为37.66mmol·kg-1和34.90mmol·kg-1。此外,pH值对于塿土吸附四环素的影响较大,当溶液pH<5时,四环素的吸附量随着pH的升高而减小,当57时,则又随着pH的升高而减小。
译  名：
Effect of Phosphorus on the Tetracycline Adsorption by Loess Soils
作  者：
LIU Ting 1,2,WU Kun 3,YUE Hai-ying 1(1.College of Natural Resources and Environment,Northwest A&F University,Yangling 712100,China;2.Key Laboratory of Plant Nutrition and the Agri-environment in Northwest China,Ministry of Agriculture,Yangling 712100,China;3.School of Environmental and Municipal Engineering,Xi'an University of Architecture and Technology,Xi'an 710055,China)
关键词：
tetracycline;phosphorus;loess soils;adsorption
摘  要：
The effects of phosphate on the adsorption of tetracycline by loess soil under the combined contaminated conditions were investi-gated in this study.The results showed that the existence of phosphate could reduce the adsorption capacity of tetracycline by loess soil.Meanwhile,the adsorption rate of tetracycline by the loess soil increased.Under the conditions of pH=7 and T=25 ℃,the adsorption isotherm data of tetracycline by the loess soil was better fitted to the Langmuir model.In addition,the adsorption capacities of tetracycline were deter-mined to be 37.66 mmol·kg-1 and 34.90 mmol·kg-1 under the individual and the combined contaminated conditions,respectively.Solution pH had obvious effects on the tetracycline adsorption by the loess soil.The adsorption capacity of tetracycline decreased with solution pH in-creasing in the pH range of 3~5,and it was elevated as pH increased from 5 to 7.Moreover,the tetracycline adsorption capacity was reduced again when pH increased from 7 to 10.

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