Adsorption of methylene blue and Cd(II) onto maleylated modified hydrochar from water

被引：138
作者：
Li, Bing [1 ]
Guo, Jianzhong [1 ]
Lv, Kangle [2 ]
Fan, Jiajie [3 ]
机构：
[1] Zhejiang A&F Univ, Zhejiang Prov Collaborat Innovat Ctr Bamboo Resou, Zhejiang Prov Key Lab Chem Utilizat Forestry Biom, Hangzhou 311300, Zhejiang, Peoples R China
[2] South Cent Univ Nationalities, Coll Resources & Environm Sci, Hubei Key Lab Catalysis & Mat Sci, Wuhan 430074, Hubei, Peoples R China
[3] Zhengzhou Univ, Sch Mat Sci & Engn, Zhengzhou 450001, Henan, Peoples R China
来源：
ENVIRONMENTAL POLLUTION | 2019年 / 254卷
基金：
中国国家自然科学基金;
关键词：
Methylene blue; Cd(II); Hydrochar; Adsorption; Bamboo; AQUEOUS-SOLUTION; GRAPHENE OXIDE; REMOVAL; CU(II); CELLULOSE; IONS; OPTIMIZATION; BIOSORBENTS; SORPTION; HYBRID;
D O I：
10.1016/j.envpol.2019.113014
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
A new carboxylate-functionalized hydrochar (CFHC) was successfully prepared by reaction of hydrochar with maleic anhydride under solvent-free conditions and followed by deprotonating carboxyl group of hydrochar with NaHCO3 solution. CFHC was characterized using X-ray photoelectron spectroscopy (XPS), elemental analysis (EA), zeta potential, Brunauer-Emmett-Teller surface area (BET) and Fourier-transform infrared spectroscopy (FTIR), and its adsorption properties and mechanisms to methylene blue (MB) and Cd(II) were investigated using the batch method. The isotherm adsorption data were accorded with Langmuir model and the maximum uptakes were 1155.57 and 90.99 mg/g for MB and Cd(II) at the temperature of 303 K, respectively. The joint analysis of batch experiments and characterizations of hydrochar confirmed the pi-pi interaction was accompanied by electrostatic interaction and hydrogen bond for MB adsorption, while the surface complexation and ion exchange were predominant mechanisms for Cd(II) adsorption. Therefore, a highly effective adsorbent CFHC prepared by a simple and environmentally friendly solid-phase synthesis is a promising candidate for wastewater treatment. (C) 2019 Elsevier Ltd. All rights reserved.
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页数：9
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