Removal of heavy metals from aqueous solution using chitosan-combined magnetic biochars.
Removal of heavy metals from aqueous solution using chitosan-combined magnetic biochars.
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DOI：
10.1016/j.jcis.2019.01.068
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发表时间：
2019-03
影响因子：
9.9
通讯作者：
Fang-fang Xiao;Jianhua Cheng;Wenxiu cao;Cao Yang;Junfeng Chen;Zifen Luo
中科院分区：
文献类型：
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作者：
Fang-fang Xiao;Jianhua Cheng;Wenxiu cao;Cao Yang;Junfeng Chen;Zifen Luo
研究了壳聚糖与磁性丝瓜生物炭(CMLB)联用去除水溶液中的铬(VI)和铜(II)。改性生物炭对铬(VI)和铜(II)的吸附容量高于未改性生物炭。40%CMB对铬(VI)和铜(II)的吸附容量分别为30.14 mg/g和54.68 mg/g。吸附在18 h内达到平衡，实验数据符合准二级动力学模型和Freundlich模型。重复使用3次后，CMB对铬(VI)和铜(II)的吸附容量分别为23.34 mg/g和42.6 mg/g。XPS结果表明，离子交换和表面络合是吸附铬(VI)和铜(II)的主要机理。
The use of chitosan combined with magnetic Loofah biochar (CMLB) was investigated for the removal of Cr(VI) and Cu(II) from aqueous solution. The modified biochar had higher Cr(VI) and Cu(II) adsorption capacity than that of pristine biochar. 40%-CMLB showed high Cr(VI) and Cu(II) adsorption capacity of 30.14 mg/g, and 54.68 mg/g, respectively. Adsorption reached equilibrium within 18 h. The study found that the experimental data showed the best fit for the pseudo-second-order kinetic model and Freundlich model. Additionally, after three reuse cycles, Cr(VI) and Cu(II) adsorption capacity by CMLB were 23.34 mg/g and 42.6 mg/g, respectively. XPS results indicated that ion exchange and surface complexation were the primary mechanisms for Cr(VI) and Cu(II) adsorption.