Carboxyl-functionalized biochar derived from walnut shells with enhanced aqueous adsorption of sulfonamide antibiotics

被引：98
|
作者：
Geng, Xinxiang [1 ]
Lv, Siying [1 ]
Yang, Jing [1 ]
Cui, Shihai [1 ]
Zhao, Zehua [2 ]
机构：
[1] Nanjing Normal Univ, Jiangsu Collaborat Innovat Ctr Biomed Funct Mat, Jiangsu Prov Key Lab Mat Cycling & Pollut Control, Jiangsu Key Lab Biomed Mat,Sch Chem & Mat Sci, 1 Wenyuan Rd, Nanjing 210023, Peoples R China
[2] Minist Ecol & Environm, Nanjing Inst Environm Sci, Nanjing 210042, Peoples R China
来源：
JOURNAL OF ENVIRONMENTAL MANAGEMENT | 2021年 / 280卷
基金：
中国国家自然科学基金;
关键词：
Biochar; Surface modification; Adsorption; Sulfonamide; Kinetics;
D O I：
10.1016/j.jenvman.2020.111749
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
The novel HNO3-modifitied biochar (NBC) was synthesized from walnut shell. The NBC was characterized from scanning electron microscopy, Fourier transform infrared spectroscopy, X-ray diffraction, X-ray photoelectron spectroscopy and Raman spectrum. The NBC was then used in the adsorption of sulfadiazine, sulfamethazine and sulfachloropyridazine from aqueous solution. The material surface has carbon/oxygen-contained groups, which is benefit for the adsorption. The results showed the adsorption ability of NBC on three sulfonamides were 32, 46, and 40 mg g(-1), respectively. The kinetic was found to follow the Elovich model and the isotherm conformed Freundlich. Adsorption was more favorable at weak acidic solution. The interactions mainly include pi-pi EDA, electrostatic interaction, Lewis acid-base interaction, hydrophobic interaction and H-bond.
引用
收藏
页数：9
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