典型文献
Effect of Mn2+on the phosphorus removal and bioflocculation under anoxic condition
文献摘要：
Manganese ion(Mn2+)generated from metallurgical,steel making and chemical industries enters sewage treatment plants and affects the sludge activity and flocculation.The effect of Mn2+on the removal of chemical oxygen demand(COD)and total phosphorus(TP)and sludge activity were investigated in anoxic zone of an anaerobic/anoxic/oxic(A2O)process.The compositions and structures of extracellular polymeric substances(EPS)were charac-terized using three-dimensional excitation emission matrix fluorescence spectroscopy(3D-EEM),X-ray photoelectron spectroscopy(XPS)and Fourier transform infrared spectroscopy(FTIR)to reveal the relationship among Mn2+,EPS and sludge flocculation.The results showed thatlow concentration of Mn2+(＜5 mg/L)improved removal efficiencies of COD and TP and increased the activity of alkaline phosphatase,acid phosphatase and dehydrogenase.Meanwhile,the addition of Mn2+increased total EPS,sludge contact angle,Zeta potential and sludge particle size,and thus enhanced sludge flocculation.However,high concentration of Mn2+(＞10 mg/L)hindered microbial flocculation and reduced removal efficiencies of the pollutants.When Mn2+was 5 mg/L,removal efficiencies of COD and TP reached 65％and 90％,respectively.Sludge flocculation was the best and SVI was 70.56 mL//g.The changes of Mn2+concentration caused deviation of groups'compositions in LB-EPS and TB-EPS,where the main components were always protein(PN)and polysaccharide(PS).The addition of Mn2+resulted in the degradation of humic acids.However,it did not give rise to significant morphology changes of EPS.
文献关键词：
中图分类号：
作者姓名：
Xiaohui Xu;Lanhe Zhang;Xiangdong Zhang;Xiaohui Guan;Dezhou Wei
作者机构：
School of Resources&Civil Engineering,Northeastern University,Shenyang 110819,China;School of Chemical Engineering,Northeast Electric Power University,Jilin 132012,China
文献出处：
引用格式：
[1]Xiaohui Xu;Lanhe Zhang;Xiangdong Zhang;Xiaohui Guan;Dezhou Wei-.Effect of Mn2+on the phosphorus removal and bioflocculation under anoxic condition)[J].环境科学学报（英文版）,2022(05):37-46
A类：
Mn2+on,bioflocculation,thatlow,Mn2+increased,Mn2+concentration,Mn2+resulted
B类：
Effect,phosphorus,removal,under,anoxic,condition,Manganese,generated,from,metallurgical,steel,making,chemical,industries,enters,sewage,treatment,plants,affects,sludge,activity,effect,oxygen,demand,COD,total,TP,were,investigated,zone,anaerobic,A2O,process,compositions,structures,extracellular,polymeric,substances,EPS,charac,terized,using,three,dimensional,excitation,emission,matrix,fluorescence,spectroscopy,EEM,ray,photoelectron,XPS,Fourier,transform,infrared,FTIR,reveal,relationship,among,results,showed,improved,efficiencies,alkaline,phosphatase,dehydrogenase,Meanwhile,addition,contact,angle,Zeta,potential,particle,size,thus,enhanced,However,high,hindered,microbial,reduced,pollutants,When,Mn2+was,reached,respectively,Sludge,best,SVI,changes,caused,deviation,groups,LB,TB,where,main,components,always,protein,PN,polysaccharide,degradation,humic,acids,did,not,give,rise,significant,morphology
AB值：
0.531311
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