Abstract:

Persulfate(PS) oxidation catalyzed by granular activated carbon(GAC) was used to advanced treatment of bio-treated coking wastewater(BTCW). Influences of GAC dose, K₂S₂O₈ concentration and pH on treatment effect were also studied during 120 min at ambient temperature(30℃). The results showed that the optimum conditions of treatment were GAC dosage of 30 g/L, K₂S₂O₈ concentration of 6 g/L, no adjusted pH. Under these conditions, the removal rate of TOC and chroma were 89.30% and 80.84% respectively. After using GAC for fourth times, the removal rate of TOC and chroma by the GAC/K₂S₂O₈ system could reach to 82.3% and 53.80% respectively, which indicated that GAC had better in-situ recovery performance in GAC/K₂S₂O₈ system.

Key words: granular activated carbon, persulfate, bio-treated coking wastewater, advanced oxidation

摘要：

采用颗粒活性炭（GAC）激活过硫酸盐（PS）氧化法处理焦化废水生化出水，在温度30℃、反应时间120 min的条件下研究了GAC投加量、K₂S₂O₈浓度和pH对废水处理效果的影响。结果表明：GAC激活PS氧化法处理焦化废水生化出水的最佳条件：GAC投加量为30 g/L，K₂S₂O₈质量浓度为6 g/L，不调节pH。在此最佳条件下，废水的色度和TOC去除率分别达到89.30%和80.84%。GAC在使用4次后，色度和TOC去除率分别为82.3%和53.8%，说明在GAC/K₂S₂O₈系统中GAC具有较好的原位恢复性能。

关键词: 颗粒活性炭, 过硫酸盐, 焦化废水生化出水, 高级氧化

CLC Number: 

• X703