FeSO_(4)强化活性污泥法除锑技术研究  

Study on technology and mechanism of antimony removal by FeSO_(4)enhanced activated sludge method

作　　者：韩玉 史成超 陈磊 刘浩然 虞家欣 史惠祥[1,2] HAN Yu;SHI Chengchao;CHEN Lei;LIU Haoran;YU Jiaxin;SHI Huixiang(Department of Environmental and Resource,Zhejiang University,Hangzhou 310027,China;Jiaxing Environmental Science Research Center,Jiaxing 314000,Zhejiang Province,China)

机构地区：[1]浙江大学环境与资源学院,浙江杭州310027 [2]嘉兴市环境科学研究中心,浙江嘉兴314000

出　　处：《浙江大学学报（理学版）》2023年第2期185-194,共10页Journal of Zhejiang University（Science Edition）

基　　金：国家水体污染控制与治理科技重大专项(2017ZX07206-002,2018ZX07208-009).

摘　　要：针对印染废水中难以去除的低浓度锑,采用FeSO_(4)强化活性污泥法,并结合高通量测序、扫描电子显微镜(SEM)、傅里叶变换红外光谱(FTIR)和X射线光电子能谱(XPS)探究其除锑机理。结果表明:(1)FeSO_(4)强化活性污泥法具有较强的除锑性能,当锑初始浓度为250μg·L^(-1),pH为8,Fe^(2+)投加量为90 mg·L^(-1)时,Sb(Ⅴ)去除率稳定在60%以上;共存离子对Sb(Ⅴ)去除率有促进或抑制作用。(2)在投加FeSO_(4)的驯化过程中,活性污泥微生物丰度和多样性降低,颗粒更松散、比表面积增大、粒径减小,与锑的接触面积增大,从而提高了除锑效率;Fe^(2+)在生化过程中被原位氧化为α-FeO(OH),与活性污泥表面的大量羧基或氨基团结合,附着在活性污泥表面,实现对锑的吸附。In order to effectively remove low-concentration antimony in the printing and dyeing wastewater,this study adapted FeSO_(4)enhanced activated sludge method,applying high-throughput sequencing,together with scanning electron microscope(SEM),Fourier transform infrared spectrometer(FTIR)and X-ray photoelectron spectroscopy(XPS)to reveal the mechanism of removing antimony.The results showed that:(1)FeSO_(4)enhanced activated sludge group had strong antimony removal performance,the initial antimony concentration was 250μg·L^(-1),pH=8,Fe^(2+)dosage was 90 mg·L^(-1),the removal efficiency of Sb(Ⅴ)was stable above 60%.At the same time,the different coexisting ions can promote or inhibit the removal rate of Sb(Ⅴ).(2)During the domestication process of adding FeSO_(4),the abundance and diversity of activated sludge microorganisms decreased,activated sludge particles became looser,specific surface area increased,particle size decreased,and the contact areas between sludge flocs and antimony in water increased,improving the efficiency of antimony removal.Fe^(2+)was oxidized toα-FeO(OH)in situ in the biochemical process,and combined with a large number of carboxyl or amino groups on the surface of activated sludge,therefore adhered to the surface of activated sludge to realize the adsorption of antimony pollutants.

关 键 词：印染废水 除锑 FeSO_(4) 活性污泥法 

分 类 号：X791[环境科学与工程—环境工程]