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Antibiotic removal by activated biochar: performance, isotherm, and kinetic studies
Journal of Dispersion Science and Technology ( IF 1.9 ) Pub Date : 2020-03-12 , DOI: 10.1080/01932691.2020.1737106
Fengli Shao 1 , Xu Zhang 1 , Xiantao Sun 1 , Jingge Shang 1
Affiliation  

Abstract

Biomass waste (Chinese traditional medicine residues) is one of the most promising sources of biochar. Here, the present study illustrated the activated biochar (BCA) was prepared using the herb residue (Astragalus membranaceus) via sodium carbonate (Na2CO3) activation for the removal of Cefradine (CF) in wastewater. The adsorbents were characterized by scanning electron microscopy, N2 adsorption-desorption analysis, Fourier transform infrared spectrum, X-ray diffraction, X-ray photoelectron spectroscopy and zeta potential analysis. The effects of initial pH value, BCA dosage, initial CF concentration and coexisting ion for CF removal were investigated. BCA showed much higher absorption capacity for CF (qm=64.76 mg/g) than the pristine biochar (BC). The uptake capacity of BCA and BC for CF was found to be pH-dependent. The analysis of the kinetic and isotherm studies indicated that strong chemical-sorption interactions occurred on the surface of BCA. The removal mechanisms of CF onto BCA would include π-π EDA interaction, hydrogen bonding, ion exchange and electrostatic adsorption. In addition, the fixed bed experiments demonstrated that BCA could be a promising and highly effective adsorbent to treat large volume of CF-contaminated wastewater.



中文翻译:

通过活性生物炭去除抗生素:性能、等温线和动力学研究

摘要

生物质废弃物(中药渣)是最有前景的生物炭来源之一。在这里,本研究说明了使用药草残留物(黄芪)通过碳酸钠 (Na 2 CO 3 ) 活化制备活性生物炭 (BC A )以去除废水中的头孢拉定 (CF)。通过扫描电子显微镜、N 2吸附-解吸分析、傅里叶变换红外光谱、X 射线衍射、X 射线光电子能谱和zeta 电位分析对吸附剂进行了表征。研究了初始 pH 值、BC A用量、初始 CF 浓度和共存离子对 CF 去除的影响。BC A与原始生物炭 (BC) 相比,CF 显示出更高的吸收能力(q m = 64.76 mg/g)。发现BC A和BC 对CF的吸收能力依赖于pH。动力学和等温线研究的分析表明,BC A表面发生了强烈的化学吸附相互作用。CF 在B A上的去除机制包括 π-π EDA 相互作用、氢键、离子交换和静电吸附。此外,固定床实验表明,BC A可能是一种有前途且高效的吸附剂,可用于处理大量 CF 污染的废水。

更新日期:2020-03-12
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