花生壳活性炭吸附苯酚及对硝基苯酚  被引量:17

Adsorption of Phenol and 4-nitrophenol on Activated Carbon Derived from Peanut Hull

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作  者:窦建芝[1] 刘金芝[1] 王慧[1] 张春荣[1] 申大忠[1] 

机构地区:[1]山东师范大学化学化工与材料科学学院,济南250014

出  处:《常熟理工学院学报》2011年第2期47-51,共5页Journal of Changshu Institute of Technology

基  金:山东省自然科学基金(NoY2008B12)资助项目

摘  要:以花生壳为原料所制备的活性炭对酚有良好的吸附能力,实验测定了苯酚、对硝基苯酚在活性炭上的吸附特性.结果表明,两种酚在活性炭上的吸附等温线可用Freundlich或Langmuir等温式分析,吸附动力学曲线可用假一级或假二级动力学模型拟合.在苯酚与对硝基苯酚的混合溶液中,当活性炭投加量不足时,两种酚之间存在竞争吸附机制,对硝基苯酚的吸附平衡常数大,因而优先吸附,混合酚的总吸附量与总平衡浓度、吸附时间的关系与单一酚溶液中的吸附类似.Activated carbon derived from peanut hull is an excellent adsorbent for phenols removal.The adsorption of phenol and 4-nitrophenol on the activated carbon was investigated.It was shown that the adsorption isotherms follow the Freundlich or Langmuir models.The kinetic data were fitted to follow the pseudo-first-order or pseudo-second-order models.Competitive adsorption was observed in the mixture of phenol and 4-nitropheno in the case of insufficient dosage of adsorbent.And 4-nitropheno was preferentially adsorbed due to the greater adsorption equilibrium constant.In adsorption from the mixture,the relations between the total amount adsorbed and total equilibrium concentration or contact time were similar to those in adsorption from single phenol solutions.

关 键 词:活性炭 吸附 苯酚 对硝基苯酚 

分 类 号:X703.1[环境科学与工程—环境工程]

 

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