摘要
在自制的光催化反应器中,采用UV/Fe3+/H2O2体系光解活性艳橙X-GN模拟废水,考察了X-GN、Fe3+和H2O2初始浓度、初始pH值及温度对光解过程的影响。结果表明,在8 W低压汞灯(λ=254 nm)照射下,UV/Fe3+/H2O2能够有效地降解结构稳定的X-GN。在pH值3.0,温度为50℃,时间为120 m in,Fe3+和H2O2初始浓度分别为2.5×10-5mol/L和1.5×10-4mol/L时,含200 mg/L X-GN模拟废水的色度去除率和矿化率分别达到100%和90.15%。依据离子色谱(IC)和GC/MS对X-GN降解中间产物和最终产物的鉴定,证实了X-GN氧化和TOC降解不同步的中间产物存在。
Photo catalytic degradation of reactive brilliant orange X-GN dyestuff was studied in an self-made Photo catalytic reactor with UV/Fe^3＋/H2O2 and 8 W low mercury light（λ =254nm）. Then the experiments by changing the initial amount of X-GN, UV/Fe^3＋/H2O2,initial pH value and temperature were made. The results indicate that UV/Fe^3＋/H2O2 can degrade the organics which have the stable structure and 100 % of color removal and 90.15 % of TOC reduction were achieved at the conditions of pH value 3.0, temperature 50℃, time 120 min, initial concentration of Fe^3＋ 2.5 × 10^-5 mol/L, initial concentration of H2O2 1.5 × 10^-4 mol/L, with 200 mg/L X-GN-containing simulated wastewater. The first order kinetic models based on reaction process data were set up for the degradation of X-GN and TOC, respectively. The intermediates and end products during the UV/Fe^3＋/H2O2 reaction were detected by IC and GC-MS spectra. It is proved that intermediates were existed unsynchronously during X-GN oxidation and TOC degradation.
出处
《印染》
北大核心
2006年第2期12-16,共5页
China Dyeing and Finishing
基金
国家自然科学基金项目(20277010)
中日合作丰田基金项目(Toy-otaFundD01-B3-010)
关键词
染整
废水处理
活性染料
降解
dyeing and finishing
waste water treatment
reactive dye
degradation
