| pH和盐对活性炭纤维吸附2,4-二硝基酚的影响 |
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| 引用本文： | 唐登勇,杨洋,郑正,郭照冰. pH和盐对活性炭纤维吸附2,4-二硝基酚的影响[J]. 环境科学与技术, 2009, 32(6) |
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| 作者姓名： | 唐登勇 杨洋 郑正 郭照冰 |
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| 作者单位： | 南京信息工程大学环境科学与工程学院;南京信息工程大学循环经济与清洁生产研究中心,江苏,南京,210044;江苏省宝应县环境保护局,江苏,宝应,225800;南京大学环境学院,江苏,南京,210093 |
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| 基金项目： | 南京信息工程大学科研启动项目，江苏省333人才工程项目 |
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| 摘 要： | 采用静态吸附的方法,研究了pH和盐对活性炭纤维ST-8和ST-13吸附水中2,4-二硝基酚的影响。结果表明,在pH0～14范围内,吸附量先随着pH的增大而增大,然后吸附量随着pH的增大而减小;在pH11时,吸附量最小但不为零;在pH11～14范围内,吸附量随着pH增大而增大;ST-8和ST-13吸附2,4-二硝基酚的最佳pH分别为2和3。pH对吸附的影响主要是改变2,4-二硝基酚的存在形态、活性炭纤维表面的电荷和溶液的物理化学性质。盐的存在对吸附2,4-二硝基酚有利;低pH时,氯化钠的作用是盐析效应;在pH较大时,氯化钠的作用是屏蔽效应。在pH为11的条件下,氯化钠浓度为5.0mol/L时,ST-13可以完全消除静电斥力,而ST-8只能克服大部分的静电斥力。
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| 关 键 词： | 活性炭纤维 吸附 2 4-二硝基酚 pH和盐 |
Effect of pH and Salt on Adsorption of 2,4-Dinitrophenol with Activated Carbon Fiber |
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| TANG Deng-yong,YANG Yang,ZHENG Zheng,GUO Zhao-bing. Effect of pH and Salt on Adsorption of 2,4-Dinitrophenol with Activated Carbon Fiber[J]. Environmental Science and Technology, 2009, 32(6) |
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| Authors: | TANG Deng-yong YANG Yang ZHENG Zheng GUO Zhao-bing |
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| Affiliation: | 1.School of Environmental Science and Engineering;Nanjing University of Information Science and Technology;Nanjing 210044;China;2.Research Centre of Cycle Economy and Clean Production;3.Baoying County Environment Protection Bureau;Baoying 225800;4.School of Environment;Nanjing University;Nanjing 210093;China |
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| Abstract: | Effects of pH and salt on the adsorption of 2,4-dinitrophenol onto activated carbon fiber(ACF)ST-8 and ST-13 were studied.Results showed that at pH 0～14,the adsorption amount firstly increased with increasing pH,then decreased with increasing pH,it was minimum but not zero at pH 11.At pH 11～14,the adsorption amount increased with increasing pH.The optimal pH for ST-8 and ST-13 adsorption of 2,4-dinitrophenol were 2 and 3 respectively.Presence of sodium chloride presented positive effect on the adsorption.The effect of NaCl on the adsorption was attributed to salting-out effect at lower pH values while the effect of NaCl was screening effect at the higher pH values. |
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| Keywords: | activated carbon fiber adsorption 2 4-dinitrophenol pH and salt |
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