摘要
针对K_(2)FeO_(4)和MIEX两种备受关注的净水技术,系统研究了二者在净水性能方面的差异以及可能存在的协同效应,分别考察了K_(2)FeO_(4)、MIEX,以及K_(2)FeO_(4)-MIEX联合处理对DOC和UV_(254)的去除效率;通过三维荧光光谱、亲疏水性和凝胶色谱分析,考察了两种技术对不同种类、不同亲疏水性以及不同分子质量有机物的去除规律。结果表明,MIEX在净水性能上整体都明显优于K_(2)FeO_(4),K_(2)FeO_(4)-MIEX联合处理过程中,K_(2)FeO_(4)预氧化能够促进疏水组分向亲水组分、大分子向小分子转化,致使二者在去除亲水性和弱疏水性有机物,腐殖质类和类络氨酸类蛋白质,以及分子质量为0.2~1 kDa有机物几方面都表现出明显的协同效应。联合处理工艺对总有机物和芳香族类有机物的协同去除效应系数分别达到2.08和1.22。以上实验结果表明,K_(2)FeO_(4)预氧化和MIEX吸附两种技术耦合在净水方面确实存在很好的协同效应。
In this study,for the two concerned water purification technologies:K_(2)FeO_(4) pre-oxidation and MIEX adsorption,their difference and possible synergistic effects of water purification were systematically explored.The removal efficiencies of DOC and UV_(254) by K_(2)FeO_(4) pre-oxidation,MIEX adsorption and the combined process of K_(2)FeO_(4)-MIEX were investigated,respectively.Through three-dimensional fluorescence spectrum,hydrophilicity and hydrophobicity,and gel chromatography analysis,the removal of organics with different species,hydrophilic and hydrophobic properties and molecular scales were studied.The results showed that on the whole,the water purification performance of MIEX adsorption was significantly better than K_(2)FeO_(4) pre-oxidation.During the combined treatment of K_(2)FeO_(4)-MIEX,K_(2)FeO_(4) pre-oxidation could promote the conversion of hydrophobic components to hydrophilic ones,macro-molecules to micro-molecules.As a result,K_(2)FeO_(4) and MIEX showed significant synergistic effects on removing hydrophilic and weakly hydrophobic components,humic-like substances and tyrosine-like proteins,and organic matters with a molecular weight range of 0.2 to 1 kDa.The synergistic coefficients of the combined process on removing total organic matters and aromatic organic matters were 2.08 and 1.22,respectively.These experimental results showed that the coupling of K_(2)FeO_(4) pre-oxidation and MIEX adsorption does have a good synergistic effect on water purification.
作者
李腾飞
张朝晖
刘芸
赵斌
王亮
师亚威
马聪
居帆
LI Tengfei;ZHANG Zhaohui;LIU Yun;ZHAO Bin;WANG Liang;SHI Yawei;MA Cong;JU Fan(School of Environmental Science and Engineering,Tiangong University,Tianjin 300387,China;State Key Laboratory of Separation Membranes and Membrane Processes,Tiangong University,Tianjin 300387,China)
出处
《环境工程学报》
CAS
CSCD
北大核心
2021年第1期74-83,共10页
Chinese Journal of Environmental Engineering
基金
国家自然科学基金面上项目(51678408,51978465)
国家重点研发计划项目(2016YFC0400506)
天津市自然科学基金重点基金项目(19JCZDJC39800)。
