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铜离子—氧化锌/十六烷基铵基吡啶-蒙脱石吸附大肠杆菌的能力
作者:杨波 马玉龙  
单位:宁夏大学生命科学学院 宁夏大学化学化工学院 银川750021 
关键词:铜离子  氧化锌  十六烷基铵基吡啶  蒙脱石  大肠杆菌  吸附 
分类号:R91
出版年,卷(期):页码:2007,35(12):1661-1665
DOI:
摘要:

以蒙脱石(montmorillonite,MMT)、铜离子(Cu2+)、氧化锌(ZnO)和十六烷基铵基吡啶(cetylpyridinium,CP)为主要原料,制备了MMT基系列细菌吸附剂Cu2+–ZnO/CP–MMT,Cu2+–ZnO/MMT,ZnO/MMT和MMT,并比较它们吸附大肠杆菌(Escherichiacoli,E.coli)的能力。结果表明:上述材料与E.coli作用1.5h后均可达到吸附平衡,吸附率大小顺序为Cu2+–ZnO/CP–MMT>Cu2+–ZnO/MMT>ZnO/MMT>MMT。介质的pH值、离子强度和吸附温度对MMT基矿物材料吸附E.coli的能力有不同程度的影响。MMT基矿物材料吸附E.coli为吸热过程,在实验温度范围内自发进行。

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A series of bacteria adsorbent Cu2+–ZnO/CP–MMT, Cu2+–ZnO/MMT, ZnO/MMT and MMT were prepared using mont- morillonite (MMT), Cu2+, ZnO, and cetylpyridinium (CP) and their adsorption capacity for Escherichia coli (E. coli)was investigated. The results show that the adsorption capacity of E. coli can reach the equilibrium after 1.5 h. The order of adsorption capacity is Cu2+–ZnO/CP– MMT>Cu2+–ZnO/MMT>ZnO/MMT>MMT. The temperature, pH value and ionic concentration of the medium have varying effects on the adsorption capacity of MMT series materials. The adsorption processes were endothermic and spontaneous in thermodynamics at the range of the temperature tested.

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基金项目:
教育部新世纪优秀人才支持计划(NCET-06-0913);; 宁夏自然科学基金(NZ0609);; 宁夏高等学校科学研究资助项目。
作者简介:
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参考文献:

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