Preparation of activated carbon derived from waste areca and its adsorption performance on Mn(Ⅱ)

被引：0
|
作者：
Long Q.-P. [1 ,2 ]
Wan Z.-Y. [1 ,2 ]
Xiong L.-Z. [1 ,2 ]
He Z.-Q. [1 ,2 ]
机构：
[1] College of Biology and Environmental Sciences, Jishou University, Jishou
[2] The Collaborative Innovation Center of Manganese-Zinc-Vanadium Industrial Technology, The 2011 Plan of Hunan Province, Jishou
来源：
Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals | 2019年 / 29卷 / 12期
基金：
中国国家自然科学基金;
关键词：
Adsorption performance; Mn(Ⅱ); Waste areca; Wastewater treatment;
D O I：
10.19476/j.ysxb.1004.0609.2019.12.21
中图分类号：
学科分类号：
摘要：
Activated carbon materials derived from waste areca (ACWA) were prepared by calcinating the waste areca(WA) at 450 ℃ for 45 min under argon atmosphere and characterized by X-ray diffractometry (XRD), scanning electron microscopy (SEM), iodine adsorption value and specific surface area measurements. The adsorption performance of ACWA on Mn(Ⅱ) was investigated by analyzing the effects of dosage of ACWA, solution pH and coexisting cations (Na+, NH4 +, Mg2+, Ca2+ and Al3+) in combination with the study of dynamic and thermodynamic characteristics. The results show that the prepared ACWA is a mesoporous carbon material with average pore diameter of 4.25 nm, specific surface area of 742.53 g/m2 and iodine adsorption value of 1241.82 mg/g. ACWA is an excellent adsorbent for Mn(Ⅱ) and the maximum adsorption capacity of 34.28 mg/g and adsorption rate of 95.2% can be obtained for waste water with 180 mg/L Mn(Ⅱ) in 60min. The Langmuir model fits well to the equilibrium data and the kinetics of the adsorption are well described by the pseudo-second order model. Adsorption mechanism analysis indicate that the efficient removal of Mn(Ⅱ) by ACWA is achieved by means of chemical complexion and/or electrostatic adsorption between electropositive Mn(Ⅱ) and electronegative functional groups on the surface of ACWA. © 2019, Science Press. All right reserved.
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页码：2877 / 2887
页数：10
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