对氯苯胺水溶液的紫外光降解研究

UV-induced degradation of 4-chloroaniline in aqueous solution

用185nm/254nm紫外光灯对4-氯苯胺水溶液进行光照降解,研究了该物质的辐照降解特性。通过对4-氯苯胺去除率、总有机碳(TOC)去除率、脱氯等过程的研究,探讨了4-氯苯胺初始浓度、pH值、不同通气条件、投加H2O2等因素对4-氯苯胺溶液降解和矿化效果的影响规律。结果表明,紫外光辐照能有效降解4-氯苯胺,在空气饱和、H2O2浓度为10mmol/L的条件下,辐照时间为2h时,4-氯苯胺的降解率可达99%,TOC去除率可达50%。

Photo-degradation of 4-chloroaniline （4-CA） in aqueous solutions was studied by UV irradiation. The degradation efficiency of 4-CA and total organic carbon （TOC） removal were investigated by changing the irradiation UV wavelength, initial concentration of 4-CA, pH value, adding H202 and saturated with different gases in the photo-degradation experimental system. The results show that the photo-degradation of 4-CA is very effective, with removal rates at about 99% and 50% of 4-CA and TOC, respectively, after 1 hour irradiation time when 10mmol/L H2O2 was added to 1mmol/L 4-CA aqueous solution and saturated with air, which implies that the UV irradiation technique might be a promising process for the treatment of 4-CA waste effluents.