摘要
近年来超滤(UF)-反渗透(RO)组合工艺逐渐在印染废水深度处理中得到推广应用,但目前对实际染整废水深度处理过程中无机与有机组分变化特征的研究仍有不足.研究考察了某实际染整废水的UF-RO深度处理工艺过程中无机离子、溶解性有机物(DOM)组分特征与来源解析.结果表明,实际染整废水深度处理工艺过程中,UF-RO工艺对常规污染物去除显著,但RO出水中仍存在有机氮;该工艺可显著去除染整废水中高芳香度、高分子量、疏水性的DOM,而陆源输入、腐殖化程度相对较低的DOM可透过RO膜.染整废水中主要阳离子为Na、Ca和K,阴离子为Cl^(-)、SO_(4)^(2-)和HCO_(3)^(-),RO单元对Fe、Si和Al的去除率为55.4%—83.6%,对K、Ca、Na、Mg的去除率达到96.3%—100%;RO膜对Mg的浓缩倍数最高,RO膜上Fe和Al相比Ca和Si更难被洗脱.UF单元可显著截留富里酸类DOM,RO出水则仅存在色氨酸类(Ex/Em=235/335 nm)和酪氨酸类(Ex/Em=225/285 nm)荧光峰,其中Ex/Em=235/335 nm峰为染料相关的荧光峰.除RO出水外,其它水样DOM均以内源输入为主,RO出水则兼具自生源输入和陆源输入特征.这些研究结果可以为人们进一步了解实际染整废水深度处理过程中水质变化特征及RO膜性能提供参考价值.
The ultrafiltration(UF)-reverse osmosis(RO)process has gradually been applied in the advanced treatments of dyeing wastewater in recent years.However,there is still a gap in the characteristics of the inorganic and organic components of dyeing wastewater in the full-scale advanced treatment process.Therefore,the composition and occurrence of the inorganic ions and dissolved organic matter(DOM),and the source of DOM during a full-scale UF-RO advanced treatment process of dyeing wastewater were investigated in this study.Results show that the UF-RO process could significantly remove the conventional contaminants,while still with organic nitrogen in the RO permeate.The DOM with higher aromaticity,molecular weight and hydrophobic characters were significantly rejected during the advanced treatment,whereas the terrestrial input,lower humification DOM were permeable in the RO system.The dominant anions were Na,Ca and K,with,Cl^(-)、SO_(4)^(2-)and HCO_(3)^(-)as the main cations in the dyeing wastewater.The removal rates of Fe,Si and Al by the RO unit were 55.4%—83.6%,and 96.3%—100%for that of K,Ca,Na,Mg,respectively.The concentration factor of Mg was the highest for the RO system.Fe and Al were harder to be cleaned from the fouling RO membrane surface than Ca and Si.The fulvic acid-like DOM could be rejected perfectly by the UF unit,and only tryptophan protein-like(Ex/Em=235/335 nm)and tyrosine protein-like(Ex/Em=225/285 nm)DOM were detected in the RO product water.Moreover,DOM with fluorescence peak at Ex/Em=235/335 nm in the RO product water were related to dyestuffs.Endogenous derived DOM were dominant in the water samples other than RO product water,while both endogenous derived and terrestrial derived DOM were mainly in the RO product water.This research can provide a valuable reference for further understanding of the dyeing wastewater characteristics during the full-scale advanced treatment and the performance of the RO system.
作者
宋铁红
赵凯
佟娟
徐宇峰
莫荣明
莫东海
夏建新
魏源送
SONG Tiehong;ZHAO Kai;TONG Juan;XU Yufeng;MO Rongming;MO Donghai;XIA Jianxin;WEI Yuansong(Key Laboratory of Water Environment in Songliao River Basin,Ministry of Education,Jilin Jianzhu University,Changchun,130118,China;State Key Joint Laboratory of Environmental Simulation and Pollution Control,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,China;Laboratory of Water Pollution Control Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing,100085,China;University of Chinese Academy of Sciences,Beijing,100049,China;School of Energy and Environmental Engineering,Hebei University of Engineering,Handan,056038,China;Zhejiang Charming Dyeing&Finishing CO.,LTD,Jiaxing,314505,China)
出处
《环境化学》
CAS
CSCD
北大核心
2022年第11期3482-3492,共11页
Environmental Chemistry
基金
天津市重点研发计划项目(19YFSLQY00060)资助.
关键词
染整废水
反渗透
无机离子
溶解性有机物
三维荧光光谱
平行因子分析.
dyeing wastewater
reverse osmosis(RO)
inorganic ions
dissolved organic matter(DOM)
three-dimensional excitation-emission matrix(EEM)fluorescence spectroscopy
parallel factor analysis.
