基于响应面法优化的异相芬顿处理电镀废水有机络合物

摘要为提高异相芬顿处理电镀废水的催化效率,优化工艺条件,采用邻苯二甲酸和盐酸缓冲溶液制备粉煤灰负载型异相芬顿催化剂,并分别研究催化剂投加量、初始pH值及H₂O₂投加量等单因素对电镀废水有机络合物的催化效率的影响及作用机制。在单因素实验的基础上,运用Box-Behnken Design响应面法优化实验设计,通过模型构建和方差分析,获得优化条件及多因素之间的交互作用,并验证模型的精准度。结果表明,各因素对电镀废水中COD_Cr去除率的影响作用排序为:初始pH值＞催化剂投加量＞H₂O₂浓度,初始pH值与H₂O₂浓度之间的交互作用较为显著;最优反应条件为:催化剂投加量16.86 g·L^-1、初始pH值3.49、H₂O₂浓度50.6 mmol·L^-1,COD_Cr去除率实际值的平均值为94.2%,与预测值的相对误差仅为0.95%,说明采用该模型优化异相芬顿降解电镀废水中有机络合物是切实可行的。

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	赵瑾
	成玉
	姜天翔
	曹军瑞

关键词：响应面法异相芬顿电镀废水缓冲溶液粉煤灰有机络合物

Abstract： In order to improve the catalytic efficiency and optimize the operating conditions of heterogeneous Fenton process for electroplating wastewater treatment, a supported fly ash heterogeneous Fenton catalyst was prepared by using phthalic acid and hydrochloric acid as the buffer solution. And the effect of factors, such as catalyst dosage, initial pH value and H₂O₂ dosage on the catalytic efficiency of organic complexes in electroplating wastewater were investigated, respectively. On the basis of single factor experiments, the Box-Behnken Design response surface methodology was used to optimize the experimental design, the optimized conditions and the interaction between multiple factors were obtained by model construction and variance analysis, and then the accuracy of the model was verified. The results show that the order of influence of various factors on the removal rate of COD_Cr in electroplating wastewater is as follows: initial pH value>catalyst dosage>H₂O₂ concentration, and the significant interaction occurred between initial pH value and H₂O₂ concentration. Moreover, the optimal reaction conditions are as follows: catalyst dosage 16.86 g·L^-1, initial pH value 3.49, H₂O₂ concentration 50.6 mmol·L^-1. Furthermore, the average actual value of COD_Cr removal rate is 94.2%, which the relative error only 0.95% compared with predicted value. Therefore, it is feasible to optimize heterogeneous Fenton degradation of organic complexes in electroplating wastewater by response surface methodology.

Keywords： response surface method heterogeneous Fenton electroplating wastewater buffer solution fly ash organic complex

Received 2022-12-26;

Fund:中央级公益性科研院所基本科研业务费专项资金项目 (K-JBYWF-2021-QR07)。

Corresponding Authors: 曹军瑞,正高级工程师,E-mail: caojunrui@163.com。 Email: caojunrui@163.com

About author: 赵瑾(1982-),女,硕士,工程师,研究方向为水质净化与再利用。

引用本文:

赵瑾, 成玉, 姜天翔, 曹军瑞.基于响应面法优化的异相芬顿处理电镀废水有机络合物[J]. 化学工业与工程, 2023,40(4): 129-136

ZHAO Jin, CHENG Yu, JIANG Tianxiang, CAO Junrui.Optimization of heterogeneous Fenton treatment of organic complexes in electroplating wastewater based on response surface methodology[J]. Chemcial Industry and Engineering, 2023,40(4): 129-136

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