简介:摘要随着国家扩大内需、加大环保投资的一系列政策出台,我国的污水处理事业已进入高速发展阶段,越来越多的污水处理工艺被应用。A2O工艺具有较好的除磷脱氮效果,而且具有成本不高,运行稳定,抗冲击力强等优点,对于新建污水处理厂的设计也将具有一定指导意义。本文结合A2O工艺的特点及其组成,实例分析A2O工艺在城市生活污水处理中的应用。
简介:Thesolidaddofthefirstprotonatedzincoborophosphate,(H3O)Zn(H2O)2BP2O8·H2O(1),wassoventothermallysyn-thesizedbythereactionofZn(NO3)2·6H2OandH3BO3withH3PO4inamixedsolvent,andstructurallycharacterizedbysingle-ystalX-raydiffractionanalysis.ItcrystallizesinthehexagonalP6122,a=0.9604(4)nm,c=1.5297(6)nm,V=1.2218(8)nm^3,Dc=2.921g/cm^3,Z=6,F(000)=1080,μ=3.495mm^-1.Thestmchwefeaturesthatthetetrahedra-te-trahedrahdlcesinterconnectedbyoctahedraandstronghydro-gembondinteractionsformathree-dimensionalframework.Theprotonatedwatermoleculesarelocatedatuniquepositions.othercharacterizationsbyIRandthermalanalysisarealsode-scribed.