摘要
以鳞片石墨和聚乙烯醇为主要原料制备了改性膨胀石墨,并采用SEM、EDS、FTIR对其进行了表征。通过单因素条件试验,研究了微波诱导改性膨胀石墨/H2O2催化氧化处理刚果红废水工艺,探讨了各种因素对废水脱色效果的影响。结果表明,微波-改性膨胀石墨-H2O2能高效快速降解废水中的刚果红,在50 mL初始pH为3、质量浓度为20 mg/L的刚果红废水中,改性膨胀石墨3 g/L、微波辐射9 min、微波功率259 W、H2O2用量为2 mL/L的较佳处理工艺条件下,刚果红脱色率达到了98.85%,三者产生了协同效应,且脱色效果优于微波-膨胀石墨-H2O2,反应符合一级反应动力学规律。
Modified expanded graphite was prepared with flake graphite and polyvinyl alcohol （PVA） as the main raw mate- rials, and characterized by SEM, EDS and FTIR. Degradation process for Congo red （CR） wastewater was studied with modi- fied expanded grahite-H2O2 under microwave radiation by single factor experiments. Effect of different factors and synergetic effect on degradation of CR were discussed. Results showed that CR was degraded rapidly and efficiently. For 50mL solution with pH of 3 and CR concentration of 20 mg/L, the decoloration rate of CR was up to 98.85% under the optimal reaction conditions of microwave radiation power input of 259 W, microwave radiation time of 9rain, modified expanded graphite mass of 3 g/L and H2O2 dosage of 2 mL/L. Degradation process of CR wastewater by microwave, hydrogen peroxide and modified expanded graphite has synergetic effect, which are better than that of expanded graphite, with kinetic reaction satis- factory to pseudo-first order.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2013年第10期186-190,共5页
Environmental Science & Technology
基金
国家自然科学基金项目(50903070
21161009)
浙江省重中之重学科开放基金项目(20110945)
浙江省"新材料及加工工程"重中之重学科优博培育基金(G9717101077)
关键词
微波
聚乙烯醇
改性膨胀石墨
刚果红
催化氧化
microwave
polyvinyl alcohol
modified expanded graphite
Congo red
catalytic oxidation
