微波强化Fenton氧化处理垃圾渗滤液的研究

Treatment of Landfill Leachate by Microwave-enhanced Fenton Oxidation

以负载铁(Ⅱ)的颗粒活性炭(GAC)为催化剂,采用微波强化Fenton氧化处理老龄垃圾渗滤液,考察了对垃圾渗滤液的处理效果及微波的作用机理。结果表明,微波对Fenton氧化反应有催化作用,且可促进渗滤液中胶体的絮凝,微波作用时间是影响处理效果的主要因素;当GAC的铁负载量为33.32mg/g、微波功率为720W、微波时间为30min时,对COD和NH3-N的去除率最高,分别达到了95.64%和88.63%;COD主要通过催化氧化作用被去除,而NH3-N主要通过絮凝、吸附作用被去除;另外,微波可使GAC再生,提高了GAC的利用率。

Using granular activated carbon （GAC） loaded with Fe （Ⅱ） as catalyst, microwave- enhanced Fenton oxidation was used to treat aged landfill leaehate. The treatment efficiency of landfill leaehate and the mechanism of microwave irradiation were investigated. The results indicate that microwave can catalyze the oxidation reaction and promote colloidal floeculation in the leachate. Microwave irradiation time is a main factor influencing the treatment effect. When iron load on GAC is 33.32 mg/g, microwave power is 720 W, and microwave irradiation is 30 min, the maximum removal rates of COD and NH3 - N are 95.64% and 88.63% respectively. COD removal is largely due to oxidation, while NH3 - N removal is largely due to flocculation and adsorption. Also, microwave has regeneration effect on GAC, which enhances the utilization rate of GAC.