Simultaneous removal of phosphate and tetracycline using LaFeO3 functionalised magnetic biochar by obtained ultrasound-assisted sol-gel pyrolysis: Mechanisms and characterisation
文献类型： 外文期刊
作者： Xu, Zhichao 1 ; Guo, Hongyang 1 ; Gan, Jinhua 2 ; Ahmed, Taosif 1 ; Wang, Teng 1 ; Liu, Jingxin 1 ; Mei, Meng 1 ; Chen, Si 1 ; Li, Jinping 1 ;
作者机构： 1.Wuhan Text Univ, Sch Environm Engn, Wuhan 430073, Peoples R China
2.Chinese Acad Fishery Sci, Yangtze River Fisheries Res Inst, Wuhan 430223, Hubei, Peoples R China
3.Wuhan Text Univ, Engn Res Ctr Clean Prod Text Dyeing & Printing, Minist Educ, Wuhan 430073, Peoples R China
关键词： Bimetallic modification; Crab shell; Biochar adsorbent; Tetracycline and phosphate adsorption
期刊名称：ENVIRONMENTAL RESEARCH （ 影响因子：8.3； 五年影响因子：8.2 ）
ISSN： 0013-9351
年卷期： 2023 年 239 卷
页码：
收录情况： SCI
摘要： Excessive phosphate and tetracycline (TC) contaminants pose a serious risk to human health and the ecological environment. As such exploring the simultaneous adsorption of phosphate and TC is garnering increasing attention. In this study, an efficient lanthanum ferrate magnetic biochar (FLBC) was synthesised from crab shells using an ultrasound-assisted sol-gel method to study its performance and mechanisms for phosphate and TC adsorption in aqueous solutions in mono/bis systems. According to the Langmuir model, the developed exhibited a maximum adsorption capacity of 65.62 mg/g for phosphate and 234.1 mg/g for TC (pH:7.0 +/- 0.1, and 25 degrees C). Further, it exhibited high resistance to interference and pH suitability. In practical swine wastewater applica-tions, whereby the concentrations of phosphate and TC are 37 and 19.97 mg/L, respectively, the proposed material demonstrated excellent performance. In addition, electrostatic adsorption, chemical precipitation and ligand exchange were noted to be the main mechanisms for phosphate adsorption by FLBC, whereas hydrogen bonding and 7C -7C interaction were the main adsorption mechanisms for TC adsorption. Therefore, this study successfully prepared a novel and efficient adsorbent for phosphate and TC.
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