Adsorption Properties of Magnetic Phosphorous Camellia Oleifera Shells Biochar to Sulfamethoxazole in Water

被引：0

作者：

Han S.-P. ^{[1
]}

Tang L.-W. ^{[1
]}

Liu Q. ^{[2
]}

Lin J.-L. ^{[1
]}

Li X.-M. ^{[1
]}

Cheng J.-H. ^{[1
,3
]}

Hu Y.-Y. ^{[1
]}

机构：

[1] Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, College of Environment and Energy, South China University of Technology, Guangzhou

[2] Eco-Environmental Monitoring and Research Center, Pearl River Valley and South China Sea Ecology and Environment Administration, Ministry of Ecology and Environment, Guangzhou

[3] South China Institute of Collaborative Innovation, Dongguan

来源：

Huanjing Kexue/Environmental Science | 2024年 / 45卷 / 02期

关键词：

adsorption; biochar; Camellia oleifera shells; magnetism; phosphoric acid; sulfamethoxazole（SMX）;

D O I：

10.13227/j.hjkx.202304022

中图分类号：

学科分类号：

摘要：

Magnetic phosphorous biochar（MPBC）was prepared from Camellia oleifera shells using phosphoric acid activation and iron co-deposition. The materials were characterized and analyzed through scanning electron microscopy（SEM），X-ray diffractometry（XRD），specific surface area and pore size analysis（BET），Fourier infrared spectroscopy（FT-IR），and X-ray photoelectron spectroscopy（XPS）. MPBC had a high surface area（1 139. 28 m2·g-1）and abundant surface functional groups，and it could achieve fast solid-liquid separation under the action of an external magnetic field. The adsorption behavior and influencing factors of sulfamethoxazole（SMX）in water were investigated. The adsorbent showed excellent adsorption properties for SMX under acidic and neutral conditions，and alkaline conditions and the presence of CO32- had obvious inhibition on adsorption. The adsorption process conformed to the quasi-second-order kinetics and Langmuir model. The adsorption rate was fast，and the maximum adsorption capacity reached 356. 49 mg·g-1. The adsorption process was a spontaneous exothermic reaction，and low temperature was beneficial to the adsorption. The adsorption mechanism was mainly the chemisorption of pyrophosphate surface functional groups（C—O—P bond）between the SMX molecule and MPBC and also included hydrogen bonding，π— π electron donor-acceptor（π—πEDA）interaction，and a pore filling effect. The development of MPBC adsorbent provides an effective way for resource utilization of waste Camellia oleifera shells and treatment of sulfamethoxazole wastewater. © 2024 Science Press. All rights reserved.

引用

页码：898 / 908

页数：10

共 49 条

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