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海绵铁还原耦合活性炭吸附-微波再生技术降解甲基橙

Keywords: 海绵铁,活性炭,微波再生,生物毒性

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Abstract:

采用海绵铁(s-Fe0)还原耦合活性炭(GAC)吸附-微波(MW)再生技术降解甲基橙(MO)溶液,重点考察了s-Fe0投加量、粒径、微波功率等因素对MO去除效果的影响。结果表明,s-Fe0投加剂量为15.0g/L、粒径为3~5mm、超声波功率为200W,反应1h,MO的去除率为94.2%。其次,采用GAC吸附-MW再生技术(800W,照射1min)循环处理上述脱色后的MO废水。结果表明,GAC吸附可有效降低废水的生物毒性及残留的染料、TOC和总铁离子浓度,且MW辐射可有效再生吸附饱和的GAC颗粒。因此,s-Fe0还原耦合GAC吸附-MW再生技术可以有效降解MO染料,具有处理效果好、实现资源循环利用等优点。

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