摘要： 采用SO₂高温焙烧法对活性炭进行了掺硫改性，并以掺硫活性炭（ACS）为催化剂，研究了对氯苯酚（4-CP）在ACS活化过硫酸盐（ACS/PS）体系中的降解规律和机理。结果表明，ACS比表面积有所降低，同时表面掺杂的含硫官能团以砜基和噻吩基为主。ACS的催化活性有明显提升，尤其在酸性环境和较高反应温度时。在反应温度为55 ℃时，反应210 min，ACS/PS体系4-CP几乎完全降解，相对改性前提高30.9%。基于中间产物测定数据，初步推断了4-CP在ACS/PS体系中的降解机理和过程。

关键词: 二氧化硫改性, 活性炭, 活化过硫酸盐, 对氯苯酚

Abstract: Activated carbon has been subjected to S-doped modification by SO₂ high temperature calcinations method,and using S- doped activated carbon(ACS) as catalyst,the degradation rules and mechanisms of parachlorophenol(4-CP)in ACS activated persulfate(ACS/PS)system are studied. The results show that ACS specific surface is decreased somewhat,and the sulfur-containing functional groups doped on surfaces are mainly sulphone radical and thiophene radical. The catalytic activity of ACS is increased obviously,especially in acidic environment and when the reaction temperature is comparatively high. When the reaction temperature is 55 ℃,and reaction time 210 min,4-CP is almost degraded completely in ACS/PS system,which is 30.9% higher than what it was before the modification. Based on the measured value of intermediate products,the degradation mechanisms and process of 4-CP in ACS/PS system are deduced preliminarily.

Key words: sulfur dioxide modification, activated carbon, activated persulfate, parachlorophenol

中图分类号: 

• TQ424.1