Adsorption of Pb(II) from aqueous solution to Ni-doped bamboo charcoal

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• 作者：Yin Wang ; Xin Wang ; Xuejiang Wang ; ^{wangxj@tongji.edu.cn} ; Mian Liu ; Zhen Wu ; Lianzhen Yang ; Siqing Xia ; Jianfu Zhao
• 关键词：Bamboo charcoal ; Adsorption ; Microwave ; Lead
• 刊名：Journal of Industrial and Engineering Chemistry
• 出版年：2013
• 出版时间：25 January, 2013
• 年：2013
• 卷：19
• 期：1
• 页码：353-359
• 全文大小：804 K

文摘

Bamboo charcoal (BC) obtained by pyrolysis of Makino bamboo in the absence of oxygen was used as support for the preparation of Ni-doped adsorbent (Ni-BC). The low-cost composite was characterized and used as an adsorbent for Pb(II) removal from water. The results showed that both BET surface area and total pore volume of Ni-BC increased. The adsorption of Pb(II) strongly depended on solution pH, temperature and ionic strength. The adsorption isotherms followed Langmuir isotherm model well, and the maximum adsorption capacities of Pb(II) at 298 K were 25.0 and 142.7 mg/g for BC and Ni-BC, respectively. The adsorption processes were well fitted by pseudo-second-order kinetic model. Thermodynamic parameters showed that the adsorptions of Pb(II) onto both adsorbents were feasible, spontaneous, and exothermic under the studied conditions. The spent Ni-BC could be readily regenerated for reuse.