制备不同质量比的水稻秸秆生物炭负载纳米零价铁（RS-nZVI）复合材料，利用XRD及SEM对其进行表征，并对复合材料吸附降解盐酸金霉素（CTC）过程进行吸附动力学、等温吸附及降解动力学分析。采用Central-Composite方法（CCD）并结合响应面分析方法（RSM）对降解过程中CTC初始质量浓度、RS-nZVI投加量、pH以及过硫酸钠（PS）投加量的影响进行讨论，对反应条件进行优化。结果表明，nZVI与RS质量比为1：1时RS-nZVI吸附降解效果最佳；响应面优化参数为CTC初始质量浓度为220.965 mg/L、RS-nZVI质量浓度为0.62 g/L、pH为5、PS浓度为0.655 mmol/L，该条件下CTC降解率为99.672%。

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(1998-),女,硕士研究生,研究方向为地下水污染修复,16438203@smail.cczu.edu.cn