Response surface optimization of degradation of chlortetracycline hydrochloride in groundwater by activated persulfate and biochar supported nano zero valent iron
JI Cai-ya1, ZHAO Yuan1, LUO Jun-jie2, XIAO Xian1, DONG Xiang-yang3
1. School of Environmental and Safety Engineering, Changzhou University, Changzhou 213000, China; 2. Environmental Protection Supervision Center of Handan Ecology and Environment Bureau, Handan 056000, China; 3. Jiangsu Xingxin Separation Equipment Manufacturing Co., Ltd., Taizhou 225300, China
Abstract: Rice straw-based biochar loaded nano-zero-valent iron (RS-nZVI) composites with different mass ratios are prepared, and characterized by XRD and SEM.The adsorption kinetics, isothermal adsorption and degradation kinetics of the degradation of chlortetracycline hydrochloride (CTC) by the composites are analyzed.Both Central-Composite method (CCD) and response surface analysis method (RSM) are utilized to explore the influences of the initial CTC concentration, RS-nZVI dosage, pH and sodium persulfate (PS) dosage in the degradation process, and to optimize the reaction conditions.The results show that the optimal mass ratio of RS to nZVI is 1:1.The parameters after the optimization by response surface method are as follows:the initial CTC concentration is 220.965 mg·L-1, the RS-nZVI dosage is 0.62 g·L-1, the pH value is 5 and the PS concentration is 0.655 mmol·L-1.The degradation rate of CTC reaches 99.672% under these conditions.
季彩亚, 赵远, 罗俊杰, 肖娴, 董向阳. 生物炭负载纳米零价铁活化过硫酸盐降解地下水盐酸金霉素的性能研究[J]. 现代化工, 2022, 42(5): 172-177.
JI Cai-ya, ZHAO Yuan, LUO Jun-jie, XIAO Xian, DONG Xiang-yang. Response surface optimization of degradation of chlortetracycline hydrochloride in groundwater by activated persulfate and biochar supported nano zero valent iron. Modern Chemical Industry, 2022, 42(5): 172-177.
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