摘要
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15.0 g/L、粒径为3～5 mm、超声波功率为200 W,反应1 h,MO的去除率为94.2%。其次,采用GAC吸附-MW再生技术(800 W,照射1 min)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。
In this study, we attempted to eliminate methyl orange （MO） in aqueous solution by magnetic sponge iron （s-Fe0） reduction combined with granular activated carbon （GAC） adsorption and microwave （MW） regeneration process, and investigated the effects of s-Fe0 dosage, particle size, ultrasonic power on the elimination process. The results showed that the decolorization rate of MO was 92.4% after 1 h treatment with the s-Fe0 particle size of 3 - 5 mm, the dosage of 1.5 g, and the ultrasonic power of 200 W. Moreover, the trea- ted solution was further treated by GAC adsorption coupled with MW-based regeneration （800 W, 1 min）. The results indicated that the GAC-based adsorption successfully eliminated biotoxicity and total organic carbon （TOC） and total iron ion concentration, as well as the residue MO of the treated solution. Furthermore, MW ra- diation could effectively regenerate the spent GAC basically maintaining the BET area, pore volume and pore size of GAC. Accordingly, it was feasible to reduce MO solution over s-Fe0 combined＇ with GAC adsorption and mi- crowave regeneration process with the advantages of better treatment, and reuse cycles.
出处
《环境工程学报》
CAS
CSCD
北大核心
2013年第6期2093-2099,共7页
Chinese Journal of Environmental Engineering
基金
国家"十二五"科技支撑计划项目(2012BAJ21B07)
关键词
海绵铁
活性炭
微波再生
生物毒性
sponge iron（s-Fe0）
granular activated carbon（GAC）
microwave（MW） regeneration
biotoxicity
