Removal of Pb(II) from solution using cellulose-containing materials
Removal of Pb(II) from solution using cellulose-containing materials
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DOI：
10.1002/jctb.1176
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发表时间：
2005-02
影响因子：
3.4
通讯作者：
S. R. Shukla;R. Pai
中科院分区：
文献类型：
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作者：
S. R. Shukla;R. Pai
廉价的含纤维素的天然材料，如椰壳纤维，黄麻，锯末和花生壳去除铅（II）从硝酸铅的水溶液中的潜力进行了评估之前和之后修改他们与一氯三嗪型染料。该材料表现出增强的吸附能力的铅（II），由于特定的染料负载。这归因于螯合和离子交换机制。染色后的椰壳纤维、锯末、黄麻和花生壳的最大阳离子吸收值分别为0.127、0.087、0.090和0.106mmolg −1。分析了未染色和染色椰壳纤维的动力学，并观察到二级速率方程，以提供实验数据的最佳相关性。建立了吸附等温线模型。在朗缪尔模型中获得了最佳拟合。当进行重复的吸附-解吸循环，与温和的氢氧化钠处理的中间步骤，染色和未染色的椰壳纤维保留其吸附能力，即使在五个循环的重复使用。2004年化学工业协会
The potential of cheap cellulose-containing natural materials such as coir, jute, sawdust and groundnut shells for removal for Pb(II) from aqueous solution of lead nitrate was assessed before and after modifying them with a monochlorotriazine type of dye. The materials showed enhanced adsorption capacity of Pb(II) due to the specific dye loading. This was attributed to chelation and an ion exchange mechanism. The maximum cation uptake values obtained were 0.127, 0.087, 0.090, and 0.106mmolg −1 for coir, sawdust, jute and groundnut shell in their dyed forms, respectively. The kinetics of both undyed and dyed coir was analysed and the second order rate equation was observed to provide the best correlation of the experimental data. Adsorption isotherm models were developed. The best fit was obtained in the Langmuir model. When subjected to repeated adsorption-desorption cycles, with an intermediate step of mild sodium hydroxide treatment, both dyed and undyed coir retained its adsorptive capacity even after five cycles of reuse. 2004 Society of Chemical Industry