Fe(Ⅱ)/S(Ⅳ)反应体系对罗丹明B溶液的脱色研究  

Investigation of the Decolorization of Rhodamine B by the Fe(Ⅱ)-sulfite System

作　　者：熊龙 王婷婷 朱霞 Xiong Long;Wang Tingting;Zhu Xia(Jiangsu Ejlskov Environmental Engineering Science and Technology Co.,Ltd.,Taizhou 225300,China)

机构地区：[1]江苏艾斯蔻环境工程科技有限公司,江苏泰州225300

出　　处：《广东化工》2025年第2期50-54,共5页Guangdong Chemical Industry

摘　　要：本文通过研究Fe(Ⅱ)/S(Ⅳ)反应体系在罗丹明B染料废水脱色中的应用,考察了不同的反应物初始浓度、溶液初始pH以及铁离子配体对罗丹明B染料废水脱色效率的影响。实验结果显示:脱色反应的最佳初始pH为4,Fe(Ⅱ)与S(Ⅳ)最佳浓度比为1∶10,铁离子配体可有效抑制脱色反应的发生。此外,还通过自由基捕获实验以探究潜在的反应机理。结果表明Fe(Ⅱ)/S(Ⅳ)反应体系中很可能生成了强氧化性的硫酸根自由基SO_(4)^(·-)和羟基自由基·OH,这些强氧化性自由基可以被有机污染物罗丹明Rh B快速捕获,从而被有效脱色。This study preliminarily investigated the oxidation ability of Fe(Ⅱ)/sulfite reaction system by examining its application in Rhodamine B decolouration.In this system,the effects of reactant initial concentration,solution initial pH,and Fe-ligands on the decolouration efficiency of RhB were also examined.The experimental results demonstrate that the optimal initial pH for the decolorization reaction is 4,and the optimal concentration ratio of Fe(Ⅱ)to S(Ⅳ)is 1∶10,and Iron ion ligands can effectively inhibit the occurrence of decolorization reaction.Besides,radical scavenging experiments were conducted to probe the underlying reaction mechanisms.The results demonstrate that highly oxidative species SO_(4)^(·-)and·OH,were mostly produced in the Fe(Ⅱ)/S(Ⅳ)reaction system,which can be scavenged by organic pollutant RhB,leading to oxidative decolourization.

关 键 词：罗丹明B 二价铁 四价硫 硫酸根自由基 羟基自由基 

分 类 号：X703[环境科学与工程—环境工程]