摘要
采用微电解—芬顿—电催化构成的组合工艺处理热镀锌清洗废水,实验分析芬顿工艺H_(2)O_(2)投加量、FeSO_(4)投加量、pH及反应时间对废水COD影响。结果表明:经过微电解预处理2 h后的废水,芬顿条件为pH 3.0、H_(2)O_(2)投加量20‰(v/v)、亚铁离子投加量1.5 g/L、芬顿反应2 h,再经过电流密度为200 A/m^(2)电催化2 h,可将COD浓度从7375 mg/L降低至295 mg/L,将pH调节至7,可沉淀废水中绝大部分铁离子。
A combination of micro-electrolysis,Fenton oxidation,and electrocatalysis was used to treat the hot-dip galvanizing cleaning wastewater.The experiment analyzed the effects of H_(2)O_(2) dosage,FeSO_(4) dosage,pH value,and reaction time on the COD removal rate in the Fenton process.The results showed that after the wastewater was pretreated by micro-electrolysis for 2 h,the Fenton conditions were pH 3.0,H_(2)O_(2) dosage of 20‰(v/v),Fe^(2+)dosage of 1.5 g/L,and Fenton reaction for 2 h.After being electrocatalyzed for 2 h at a current density of 200 A/m^(2),the COD concentration was reduced from 7375 mg/L to 295 mg/L,and the pH was adjusted to 7,in which most of the iron ions in the wastewater were precipitated.
出处
《环境保护与循环经济》
2025年第6期24-27,共4页
Environmental Protection and Circular Economy
关键词
高盐清洗废水
芬顿体系
电催化氧化
high-salt washing wastewater
Fenton system
electrocatalytic oxidation
