Adsorption Performance and Mechanism of Cr(VI) by Amino-Functionalized Chitosan Microspheres

被引：0
|
作者：
Jiang D. [1 ]
Xu Q. [1 ]
Wu X. [1 ]
Long H. [1 ,2 ]
Zhang Q. [1 ]
机构：
[1] Engineering Research Center of Biofilm Water Purification and Utilization Technology, Ministry of Education, Anhui University of Technology, Ma’anshan
[2] Ministry of Education Key Laboratory of Metallurgical Emission Reduction and Comprehensive Utilization of Resources, Anhui University of Technology, Ma’anshan
来源：
Gaofenzi Cailiao Kexue Yu Gongcheng/Polymeric Materials Science and Engineering | 2024年 / 40卷 / 01期
关键词：
adsorbent; biomass; chitosan; gels; modification;
D O I：
10.16865/j.cnki.1000-7555.2023.0267
中图分类号：
学科分类号：
摘要：
CS/DETA gel spheres rich in hydroxyl and amino group were prepared using chitosan (CS) as substrate, sodium tripolyphosphate (TPP) as curing agent, glutaraldehyde (GLA) as cross- linking to improve its acid resistance, and diethylenetriamine (DETA) as modification, to adsorb Cr(VI) in water bodies. Infrared spectral characterization confirm the successful grafting of DETA; X- ray photoelectron spectroscopy characterization shows that Cr(VI) was adsorbed onto the surface of CS/DETA; Zeta potential characterization reveals the surface electronegativity of CS/ DETA, which is more prone to adsorb Cr(VI) under acidic condition. The adsorption process was investigated by kinetics and thermodynamic models, and the results show that the adsorption process of CS/DETA on Cr(VI) is more consistent with the proposed first- order kinetic model and Langmuir isothermal adsorption model, and the maximum adsorption amount of Cr(VI) is 370.92 mg/g at 318.15 K and pH=2, and the reaction is a spontaneous heat absorption reaction. © 2024 Sichuan University. All rights reserved.
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页码：45 / 56
页数：11
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共 22 条
  • [1] Zhao L G, Pu S Y, Yang J Y, Et al., Study on the characteristics of Cr<sup>6+</sup> pollution in groundwater of soil around a chromiumslag dumpsite, Environmental Engineering, 33, 2, pp. 117-121, (2015)
  • [2] Luo C., Modification of carbon nanotubes by manganese dioxide and iron tetroxide and their adsorption on Cd(II) and Cr(VI), (2014)
  • [3] Auta M, Hameed B H., Chitosan-clay composite as highly effective and low- cost adsorbent for batch and fixed- bed adsorption of methylene blue, Chemical Engineering Journal, 237, pp. 352-361, (2014)
  • [4] Karimi F, Ayati A, Tanhaei B, Et al., Removal of metal ions using a new magnetic chitosan nano-bio- adsorbent
  • [5] a powerful approach in water treatment, Environmental Research, 203, (2022)
  • [6] Saleh T A, Haladu S A, Ali S, Et al., A novel cross- linked pH-responsive tetrapolymer: Synthesis, characterization and sorption evaluation towards Cr(III), Chemical Engineering Journal, 269, pp. 9-19, (2015)
  • [7] Guo J Z, Xu H, Chen L, Et al., A pyridinium functionalization chitosan for efficient elimination of methyl orange and Cr(VI), Bioresource Technology, 365, (2022)
  • [8] Wang J L, Zhuang S T., Removal of various pollutants from water and wastewater by modified chitosan adsorbents, Critical Reviews in Environmental Science and Technology, 47, pp. 2331-2386, (2014)
  • [9] Godiya C B, Gabrielli S, Materazzi S, Et al., Depolymerization of waste poly(methyl methacrylate) scraps and purification of depolymerized products, Journal of Environmental Management, 231, pp. 1012-1020, (2019)
  • [10] Zhang H, Li R H, Zhang Z Q., A versatile EDTA and chitosan bifunctionalized magnetic bamboo biochar for simultaneous removal of methyl orange and heavy metals from complex wastewater, Environmental Pollution, 293, (2022)
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