Rapid Removal of Zinc(II) from Aqueous Solutions Using a Mesoporous Activated Carbon Prepared from AgriculturalWaste

被引：24
|
作者：
Zhang, Xiaotao [1 ,2 ]
Hao, Yinan [2 ]
Wang, Ximing [2 ]
Chen, Zhangjing [3 ]
机构：
[1] Inner Mongolia Agr Univ, Coll Sci, Hohhot 010018, Peoples R China
[2] Inner Mongolia Agr Univ, Coll Mat Sci & Art Design, Hohhot 010018, Peoples R China
[3] Virginia Tech Univ, Dept Sustainable Biomat, Blacksburg, VA 24061 USA
来源：
MATERIALS | 2017年 / 10卷 / 09期
基金：
中国国家自然科学基金;
关键词：
activated carbon; adsorption; zinc(II); desorption; mechanism; CHEMICAL ACTIVATION; ACID ACTIVATION; WASTE BIOMASS; HEAVY-METALS; ADSORPTION; IONS; BIOSORPTION; PB(II); WATER; EQUILIBRIUM;
D O I：
10.3390/ma10091002
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
A low-cost activated carbon (XSBLAC) prepared from Xanthoceras Sorbifolia Bunge hull via chemical activation was investigated to determine its adsorption and desorption properties for zinc(II) ions from aqueous solutions. XSBLAC was characterized based on its N-2-adsorption/desorption isotherm, EDX,XRD, SEM and FTIR results. An adsorption study was conducted in a series of experiments to optimize the process variables for zinc(II) removal using XSBLAC. Modeling the adsorption kinetics indicated good agreement between the experimental data and the pseudo-second-order kinetic model. The Langmuir equilibrium isotherm fit the experimental data reasonably well. The calculated enthalpy (Delta H-0), entropy (Delta S-0) and Gibbs free energy (Delta G(0)) values revealed the endothermic and spontaneous nature of the adsorption process. HNO3 displayed the best desorption performance. The adsorption mechanism was investigated in detail through FTIR and SEM/EDX spectroscopic analyses. The results suggested that XSBLAC is a potential biosorbent for removing zinc(II) from aqueous solutions.
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页数：18
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