以棉花秸秆为原料、ZnCl₂/AlCl₃为改性剂制备活性炭（AC）。利用中心复合设计法（CCD）对主要影响因子进行参数优化，并利用预测模型确定最佳制备工艺为：活化温度为640℃、浸渍质量比（棉秸秆与改性剂的质量比）为1.58：1、活化时间为87 min、改性剂配比（改性剂中ZnCl₂与AlCl₃的质量比）为9：1。在实际实验条件下，样品得率、总酸含量分别为44.32%、0.87 mmol/g，与模型预测值误差分别为1.79%、1.04%。利用碱性有机染料甲基紫研究其吸附性能，当活性炭投加量为1.18 g/L、溶液质量浓度为82.00 mg/L时，其对甲基紫去除率均能达到90%以上。ZnCl₂/AlCl₃改性棉秸秆基活性炭具有良好的吸附性能，为棉秸秆的应用提供了参考依据。

Activated carbon is prepared by chemical activation method using cotton stalk as material and ZnCl₂/AlCl₃ as modifier.Central Composite Design (CCD) method is used to optimize the parameters of main influencing factors.By utilizing the predicted model,the optimum parameters are obtained as follows:activation temperature at 640℃,mass ratio between cotton straw and modifier is 1.58∶1,activation time lasts for 87 min,and mass ratio of ZnCl₂ to AlCl₃ in modifier is 9∶1.Under actual experimental conditions,the sample yield and total acid content are 44.32% and 0.87 mmol·g^-1,respectively,and the errors to the predicted values are 1.79% and 1.04%,respectively.Structure and composition of the prepared activated carbon are characterized.The removal rate of methyl violet by the prepared activated carbon can exceed 90% when the dosage of activated carbon is 1.18 g·L^-1 and the concentration of solution is 82.00 mg·L^-1.ZnCl₂/AlCl₃ modified cotton stalk-based activated carbon has good adsorption properties,which provides references for the application of cotton stalks.

宾齐(1995-),女,硕士研究生,研究方向为环保材料,1457636356@qq.com