ZnCl 改性好氧颗粒污泥生物炭的开发及其对四环素的增强吸附作用
ZnCl modified biochar derived from aerobic granular sludge for developed microporosity and enhanced adsorption to tetracycline.
机构信息
School of Resource and Environment, Northeast Agricultural University, Harbin 150030 China.
State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology, Harbin 150090, China.
出版信息
Bioresour Technol. 2020 Feb;297:122381. doi: 10.1016/j.biortech.2019.122381. Epub 2019 Nov 9.
In this study, biochar derived from aerobic granular sludge was modified by ZnCl (Zn-BC) to improve the adsorption performance of tetracycline (TC). The surface area, pores, and functional groups of Zn-BC were characterized by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area, Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) and the effects of initial pH, TC concentration, and temperature on TC adsorption performance were analyzed. At the same time, the adsorption kinetics, isotherms, thermodynamics and diffusion models were studied. The results showed that the BET surface area and micropore volume of Zn-BC were 852.41 m·g and 0.086 cm·g, respectively. The maximum adsorption performance of TC was 93.44 mg·g, and it was less influenced by pH. The adsorption of TC on Zn-BC agreed well with the pseudo-second-order model and the Langmuir isotherm. The thermodynamic parameters indicated that the adsorption process was a spontaneously endothermic reaction.
在这项研究中，采用好氧颗粒污泥制备的生物炭经 ZnCl（Zn-BC）改性以提高四环素（TC）的吸附性能。采用扫描电子显微镜（SEM）、BET 比表面积、傅里叶变换红外（FTIR）光谱和 X 射线衍射（XRD）对 Zn-BC 的表面形貌、孔结构和官能团进行了表征，并分析了初始 pH 值、TC 浓度和温度对 TC 吸附性能的影响。同时，还研究了吸附动力学、等温线、热力学和扩散模型。结果表明，Zn-BC 的 BET 比表面积和微孔体积分别为 852.41 m·g 和 0.086 cm·g。TC 的最大吸附性能为 93.44 mg·g，且受 pH 值的影响较小。TC 在 Zn-BC 上的吸附较好地符合准二级动力学模型和 Langmuir 等温线。热力学参数表明，吸附过程是一个自发的吸热反应。
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