基于硫酸根自由基的高级氧化技术原位再生活性炭

In Situ Oxidation Regeneration of the Used Activated Carbon with Advanced Oxidation Technology Based on Sulfate Radicals

以吸附处理染料生化废水的饱和活性炭为研究对象,采用活化过硫酸氢钾(PMS)和过硫酸钠(SPS)的方法再生活性炭.分别考察了活化方式、氧化剂用量、pH值、再生时间、温度对再生活性炭吸附效果的影响,以再生前后活性炭吸附对废水COD,TOC和UV254值降低率的比值来计算再生效率.结果表明,热活化与其他活化方法相比,再生效果更好;当氧化剂质量分数为100%、活化温度为100℃、再生时间为60min时,活性炭经活化PMS和SPS再生后的再生效率(以COD值降低率计算)分别为53.90%和55.98%.表面基团测定、傅里叶变换红外光谱(FT-IR)、扫描电子显微镜(SEM)分析表明,再生活性炭与原活性炭性质相近,恢复程度较高,与吸附试验结果对应.

In situ oxidation regeneration of the activated carbon saturated by bio-effluents of dyestuff- making wastewater was studied with potassium peroxymonosulfate （PMS） and sodium peroxydisulfate （SPS）. The effects of activation methods of persulfate, pH value, mass fraction of oxidant, regeneration time and temperature on the regeneration were investigated. The results showed that thermal activation was more effective than other methods. The regeneration efficiencies determined by COD of the saturated activated carbon by PMS and SPS can reach 53.90% and 55.98% respectively at oxidizer mass fraction of 100%, activation temperature of 100 ℃, 60 min of reaction time. Examination of surface groups, Fourier transform infrared spectroscopy （FT-IR）, scanning eletron microscope （SEM） analyses showed that the regenerated carbon properties and corresponded with adsorption experimental were recovered compared with original activated carbon results.