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为了有效提高活性炭在微波诱导降解有机污染物中的催化活性,采用纳米二氧化钛负载活性炭结合微波照射技术(TiO2/AC/MW)对水中甲基对硫磷进行降解研究。结果表明:对总体积为25 mL、质量浓度为50 mg/L甲基对硫磷溶液,催化剂TiO2/AC质量浓度为0.8 g/L时,经微波照射1.0 min后,甲基对硫磷可降解85.8%。同样条件下,适当延长微波照射时间(2.5 min),降解率可达到100.0%。另外,采用UV-vis和离子色谱技术探讨了TiO2/AC中TiO2质量分数、微波照射时间、溶液初始质量浓度和催化剂质量浓度等因素对降解率的影响。TiO2/AC/MW技术具有降解率高、降解速度快、成本低、没有中间产物生成和无2次污染等优点,在甲基对硫磷废水处理中具有很好的应用前景。
In order to effectively improve the catalytic activity of activated carbon in microwave-induced degradation of organic pollutants, the degradation of methyl parathion in water was investigated using nano-titania supported activated carbon combined with microwave irradiation (TiO2 / AC / MW). The results showed that for the total volume of 25 mL and the mass concentration of 50 mg / L methyl parathion solution and the catalyst TiO2 / AC mass concentration of 0.8 g / L, the content of parathion methyl Degradation of 85.8%. The same conditions, the appropriate extension of microwave irradiation time (2.5 min), the degradation rate can reach 100.0%. In addition, the effects of TiO2 mass fraction, microwave irradiation time, initial solution concentration and catalyst mass concentration on the degradation rate of TiO2 / AC were discussed by UV-vis and ion chromatography. TiO2 / AC / MW technology has the advantages of high degradation rate, fast degradation, low cost, no intermediate production and no secondary pollution, and has good application prospects in the treatment of methyl parathion wastewater.