Fe2+激活过硫酸盐耦合活性炭深度处理焦化废水

采用Fe²⁺激活过硫酸盐（PS）耦合活性炭处理焦化废水生化出水.在原水TOC为86.4mg/L，色度338倍的条件下，研究PS和Fe²⁺投加量，初始pH值等因素对处理效果的影响.结果表明：PS和Fe²⁺投加量分别为1.5和4mmol/L，不调节pH值（8.0），反应60min，色度和TOC去除率可达87.17%和68.16%.经Fe²⁺/PS体系处理的废水采用A，B两种活性炭进行吸附处理，结果表明：B炭的吸附效果较好，且可去除Fe²⁺/PS体系残留的PS.B炭15g/L，反应120min时，出水色度为14倍，TOC 11.86mg/L.Fe²⁺激活PS氧化法耦合活性炭吸附深度处理焦化废水时，总色度去除率95.86%，总TOC去除率86.27%.对生化出水，Fe²⁺/PS体系出水和活性炭吸附出水进行三维荧光光谱扫描分析，结果表明：Fe²⁺/PS体系能氧化分解废水中部分类腐植酸物质，而活性炭吸附则可进一步去除了废水中残留的类腐植酸物质.

Advanced treatment of bio-treated coking wastewater by coupling of ferrous-activated persulfate oxidation and activated carbon adsorption

The paper focuses on advanced oxidation process of Fe²⁺ activated persulfate (PS) coupled with activated carbon adsorption which was originally applied to treat bio-treated coking wastewater. The effects of PS dose, Fe²⁺ dose and initial pH in Fe²⁺/PS system on the treatment efficiency of bio-treated coking wastewater were investigated at the TOC concentration of 86.4mg/L and chroma of 338times in raw wastewaters. The results indicated that the removal rates of chroma and TOC were 87.17% and 68.16%, respectively, under the condition of 1.5mmol/L PS, 4mmol/L Fe²⁺, not adjusted pH value (pH=8) when reaction time was 60minutes. The advanced adsorption treatment on effluent of Fe²⁺/PS system was also carried out by two kinds of granular activated carbon A and B. The results showed that the activated carbon B had remarkable better adsorption performance, which could further eliminate residual persulfate by Fe²⁺/PS system. When the dose of activated carbon B was 15g/L, and reaction time was 120minutes, the effluent chroma and TOC concentration reached 14times and 11.86mg/L, respectively. After the treatment of Fe²⁺ activated persulfate oxidation coupled with activated carbon adsorption on biological treated coking wastewater, the total removal rates of chroma and TOC reached 95.86% and 86.27%, respectively. The results of three dimensional fluorescence spectra analysis for bio-treated coking wastewater, Fe²⁺/PS system effluent, and activated carbon adsorption effluent showed that Fe²⁺/PS system can decompose humic acid-like compounds in wastewater, and activated carbon adsorption may further remove residual humic acid-like compounds in wastewater.