罗清,井天昊,张安龙,宗晓宁,刘育星.聚苯乙烯/Fe3O4悬浮填料的制备及类芬顿处理愈创木酚模拟废水的研究[J].中国造纸学报,2023,38(4):31-40 |
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聚苯乙烯/Fe3O4悬浮填料的制备及类芬顿处理愈创木酚模拟废水的研究 |
Preparation of Polystyrene/Fe3O4 Suspension Filler and Fenton-like Treatment of Guaiacol Simulated Wastewater |
投稿时间:2023-08-03 |
DOI:10.11981/j.issn.1000-6842.2023.04.31 |
中文关键词: 纳米Fe3O4 PS/Fe3O4悬浮填料 类Fenton反应 愈创木酚 |
Key Words:nano Fe3O4 PS@Fe3O4 suspended filler Fenton-like reaction guaiacol |
基金项目:广西清洁化制浆造纸与污染控制重点实验室项目(2021KF16)。 |
作者 | 单位 | 邮编 | 罗清* | 陕西科技大学轻工科学与工程学院,轻化工程国家级实验教学示范中心,陕西西安,710021 | 710021 | 井天昊 | 陕西科技大学轻工科学与工程学院,轻化工程国家级实验教学示范中心,陕西西安,710021 | 710021 | 张安龙 | 陕西科技大学环境科学与工程学院,陕西西安,710021 | 710021 | 宗晓宁 | 陕西科技大学轻工科学与工程学院,轻化工程国家级实验教学示范中心,陕西西安,710021 | 710021 | 刘育星 | 陕西科技大学轻工科学与工程学院,轻化工程国家级实验教学示范中心,陕西西安,710021 | 710021 |
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中文摘要: |
均相芬顿(Fenton)处理废水存在化学药剂投加量大、铁泥产生量多的问题,类Fenton是有效的解决途径之一。本课题以羟基修饰的纳米Fe3O4(Fe3O4-OH)和苯乙烯(St)为主要原料,利用链式加聚反应合成聚苯乙烯(PS)/Fe3O4悬浮填料,用于类Fenton处理愈创木酚模拟废水。分别用傅里叶变换红外光谱仪(FT-IR)、热重分析仪(TGA)、超景深显微镜、扫描电子显微镜(SEM)、X射线能谱仪(EDS)对PS/Fe3O4悬浮填料进行分析和表征,发现PS/Fe3O4悬浮填料具有Fe3O4-OH和PS的双层复合结构,其中Fe3O4的质量占比为51.6%。对比研究了PS/Fe3O4悬浮填料和纳米Fe3O4类Fenton降解愈创木酚的效果,发现PS/Fe3O4悬浮填料的处理效果更优,在最佳工艺条件:初始pH值为4,m(CODCr)∶m(H2O2)=1∶1.5,悬浮填料投加量为0.8 g/L,反应时间为120 min下,愈创木酚降解率达到88.63%。通过自由基猝灭实验证明Fe3O4修饰前后愈创木酚的类Fenton降解体系的主要活性自由基仍为·OH。 |
Abstract: |
Fenton-like reaction is one of the effective solutions to the problems of large dosage of chemical agents and large amount of iron mud production in homogeneous Fenton. In this study, polystyrene (PS)/Fe3O4 suspension filler was synthesized with Fe3O4-OH and styrene (St) as main raw materials by chain polymerization reaction, which was used for Fenton-like treatment of guaiacol simulated wastewater. Fourier transform infrared spectroscopy (FT-IR), thermogravimetry (TGA), ultra-depth of field microscope, scanning electron microscope (SEM) and X-ray energy spectrometry (EDS) were used to analyze and characterize the suspension fillers, and it was found that PS/Fe3O4 suspension fillers had a double-layer composite structure of Fe3O4-OH and polystyrene. The mass ratio of Fe3O4 is 51.6%. The degradation effect of PS/Fe3O4 suspension filler and nano Fe3O4 Fenton-like system on guaiacol was compared and studied. It was found that the treatment effect of PS/Fe3O4 suspension filler was better, and the optimal process conditions were as follows: The initial pH value was 4, m(CODCr)∶m(H2O2)=1∶1.5, the dosage of suspension filler was 0.8 g/L, the reaction time was 120 min, and the degradation rate of guaiacol reached 88.63%. The free radical quenching experiment showed that the main active free radical in the Fenton-like degradation system of guaiacol before and after Fe3O4 modification was ·OH. |
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