摘要：

以活性炭作为吸附剂处理焦化废水中的难降解有机物,COD去除率只有 70 %左右,与催化氧化法联合后,去除率大幅度提高。正交实验结果表明,H₂ O₂ - Fe²⁺ (Fenton试剂 )的催化氧化效果比 H₂O₂-Cu²⁺ 好,最佳处理条件为:H₂O₂ 1 .5 g/ L,Fe²⁺ 0 .4 g/ L,反应温度 80℃。经活性炭吸附 - Fenton试剂催化氧化处理后,焦化废水的COD从1173mg/ L 降至 4 3.2 m g/ L,去除率达 96 .3%。同时,H₂O₂ 作氧化剂对活性炭进行再生,再生率达到 96 %以上。

关键词: 吸附, 催化氧化, 焦化废水, 活性炭, Fenton试剂

Abstract:

The removal efficiency of refractory organics in coke plant wastewater is only 70% by using activated carbon as adsorbent. By means of combining adsorption with catalytic oxidation,the removal rates of COD will be improved greatly. The results of orthogonal experiment show that the treatment effect of H₂O₂-Fe²⁺ (Fenton reagent)is better than that of H₂O₂-Cu²⁺ ,and the optimal operation conditions are as follows:H₂O₂ 1.5 g/L;Fe ²⁺ 0.4 g/L ,reaction temperature 80 ℃. After the treatment by adsorption catalytic oxidation process,the COD of coke plant wastewater is reduced to 43.2 mg/L from 1 173.0 mg/L,and the removal efficiency of COD is up to 96.3%. The regeneration of the activated carbon saturated with organic can be achieved by H₂O₂ as oxidant,with 96.6% regeneration efficiency.

Key words: absorption, catalytic oxidation, coke plant, wastewater, activated carbon, Fenton reagent

中图分类号: 

• X703.1