Page 203 - 《精细化工》2023年第5期

第 40 卷第 5 期 精 细 化 工 Vol.40, No.5
20 23 年 5 月 FINE CHEMICALS May 2023

水处理技术与环境保护
靛蓝废水无机盐环境下铝极板溶解

与电化学行为分析

1
1*
张梦迪 ，张 维 1,2 ，姚继明
（1. 河北科技大学 纺织服装学院，河北 石家庄 050018；2. 江苏省纺织印染节能减排与清洁生产工程
中心，苏州大学，江苏 苏州 215123）

摘要：为提升靛蓝染色废水电絮凝效率，确定电絮凝过程中最佳水解金属盐形态形成条件，采用 Al-Ferron 逐时
络合比色法探讨电絮凝过程中初始 pH、共存阴离子种类、电流密度对铝盐形态分布的影响，同时监测絮体 Zeta
电位、终止 pH、体系电流密度与电导率的变化。通过显微镜观察电极溶解腐蚀情况，利用电化学工作站测定电
极的极化曲线与电化学阻抗谱，分析其电化学行为。结果表明，靛蓝废水电絮凝过程中，最佳初始 pH 范围为
–
6~7，此时具有优势絮凝形态的中聚合态铝（Al b ）含量较高；Cl 的加入可抑制电极钝化，提升电絮凝反应速率；
2
低电流密度有利于电极均匀腐蚀和 Al b 的存在，当电流密度为 15 mA/cm 时体系内 Al b 含量达 4.76 mg/L，可产
生较好的絮凝效果。
关键词：靛蓝染色废水；电絮凝；铝形态；电极腐蚀；电极钝化；水处理技术
中图分类号：X791；O646.5 文献标识码：A 文章编号：1003-5214 (2023) 05-1123-07

Analysis of aluminum electrode dissolution and electrochemical behavior
in inorganic salt environment of indigo wastewater

1,2
1*
1
ZHANG Mengdi , ZHANG Wei , YAO Jiming
（1. College of Textile and Garment, Hebei University of Science & Technology, Shijiazhuang 050018, Hebei, China;
2. Jiangsu Engineering Research Center of Textile Dyeing and Printing for Energy Conservation, Discharge Reduction
and Cleaner Production, Soochow University, Suzhou 215123, Jiangsu, China）

Abstract: In order to improve the electrocoagulation efficiency of indigo dyeing wastewater, and determine
the optimal formation conditions of hydrolyzed metal salts, the Al-Ferron timed spectrophotometry was
used to investigate the influence of initial pH, coexisting anion species, and current density on the distribution of
aluminum salts during electrocoagulation. Meanwhile, the changes of floc Zeta potential, termination pH,
system current density and conductivity were monitored. The dissolution and corrosion of the electrode
were observed microscopically, and the electrochemical behavior was analyzed by measuring the electrode
polarization curve and electrochemical impedance spectroscopy using an electrochemical workstation. The
results showed that, when the initial pH range was 6~7 during the electrocoagulation, the content of
medium polyaluminum(Al b) with the dominant flocculation form was higher. The addition of chloride ions
inhibited the electrode passivation and enhanced the electrocoagulation reaction rate. The low current
density was beneficial to the uniform corrosion of electrode and the existence of Al b. The content of Al b in
2
the system could reach 4.76 mg/L at a current density of 15 mA/cm , which could produce good flocculation.
Key words: indigo dyeing wastewater; electrocoagulation; aluminum species; electrode corrosion; electrode
passivation; water treatment technology

收稿日期：2022-10-09; 定用日期：2022-11-25; DOI: 10.13550/j.jxhg.20220918
基金项目：河北省自然科学基金项目（B2022208014）；河北省重点研发计划项目（20374004D）；江苏省纺织印染节能减排与清洁生
产工程研究中心开放课题（SDGC2105）；河北省研究生创新资助项目（CXZZSS2022086）；河北省省属高校基本科研业务专项资金
（2021YWF17）
作者简介：张梦迪（1997—），男，硕士生。联系人：姚继明（1965—），男，教授，博士，E-mail：yaojiming66@126.com。