Adsorption of Hg(II) ions from aqueous solution by thiosemicarbazide-modified cellulose adsorbent

被引：0
|
作者：
School of Light Industry and Engineering, State Key Lab of Pulp and Paper Engineering, South China University of Technology, 381 Wushan Road, Guangzhou, Guangdong [1 ]
510640, China
机构：
来源：
BioResour. | / 2卷 / 4670-4695期
基金：
中国国家自然科学基金;
关键词：
Adsorption kinetics - Competitive adsorption - Equilibrium adsorption - Langmuir isotherm models - Modified cellulose - Pseudo-second order model - Thiosemicarbazides - X-ray photoelectron spectrometries;
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摘要：
A highly selective cellulose-based adsorbent for mercury [(Hg)II] ion was prepared and characterized using Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis, X-ray photoelectron spectrometry, elemental analysis, and scanning electron microscopy. The results showed that functional thiosemicarbazide-grafted cellulose achieved equilibrium adsorption in 120 min, and the adsorbents had a Hg(II) ion removal rate of approximately 98.5% at a pH of 5.0. The adsorption kinetics fit the pseudo-second-order model, which indicated that the adsorption was a chemical process. Additionally, the adsorption isotherm data showed a best fit with the Langmuir isotherm model, with a maximum Hg(II) ion adsorption capacity of 331.1 mg/g. This adsorbent had a good selectivity for Hg(II) during competitive adsorption. © 2019, North Carolina State University.
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页码：4670 / 4695
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