超声/Fenton联用技术处理垃圾渗滤液中的有机物
Degradation of organics in landfill leachate by ultrasound/Fenton process
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摘要: 详细研究了超声/Fenton联用技术对垃圾渗滤液中有机物的处理效果。研究内容包括:超声波频率对垃圾渗滤液色度和COD去除率的影响,超声波功率对垃圾渗滤液色度和COD去除率的影响以及Fenton试剂用量和pH值对垃圾渗滤液色度去除率和COD去除率的影响。还利用一次正交回归实验确定了超声/Fenton联用技术处理垃圾渗滤液的优化条件,并在优化条件的基础上,对超声波技术、Fenton高级氧化技术和超声/Fenton联用技术对垃圾渗滤液的处理效果进行比较研究。研究结果表明:超声/Fenton联用技术对垃圾渗滤液的色度去除率和COD去除率最高,其色度去除率接近100%,COD去除率达到73.5%。超声/Fenton联用技术处理垃圾渗滤液的优化条件是:超声频率为28 kHz,超声功率为75 W,Fe2+浓度为280 mg/L,H2O2浓度为1.29×104 mg/L,pH值为2.5。超声波的频率、功率和Fenton试剂用量之间存在优化匹配值。
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关键词:
- 垃圾渗滤液 /
- 超声/Fenton技术 /
- 有机物 /
- 色度去除率 /
- COD去除率
Abstract: The treatment of landfill leachate by ultrasound/Fenton process was carried out. The effects of operating conditions such as ultrasonic frequencies, ultrasonic powers, Fenton’s reagent dosage and pH value on color and COD removal were investigated. The optimal conditions of ultrasound/Fenton process were found. Color and COD removal rates of ultrasound process, Fenton process and ultrasound/Fenton process under optimal conditions were compared. The experimental results indicated that ultrasound/Fenton process attained higher color and COD removal rates than ultrasound process and Fenton process. Almost 100% of color removal rate and 73.5% of COD removal rate were attained in ultrasound/Fenton process in 90 minutes. The optimal conditions in this research were ultrasonic frequency of 28 kHz, power input of 75 W, Fe2+ concentration of 280 mg/L, H2O2 concentration of 1.29×104 mg/L and pH value of 2.5. There are optimal matching values among ultrasonic frequencies, ultrasonic powers, Fenton’s reagent dosage and pH value.-
Key words:
- landfill leachate /
- ultrasound/Fenton process /
- organics /
- color removal /
- COD removal
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