多孔水泥石合成滤料制备和其污水吸附除磷试验探究

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1、多孔水泥石合成滤料制备和其污水吸附除磷试验探究　　摘要：以普通硅酸盐水泥为主要原料，经反应釜高温蒸汽养护制备出多孔水泥石合成滤料。通过正交实验得到最优工艺组合条件为水固比0.25，成孔剂/水泥=0.3，反应釜内蒸养恒温温度为180℃，恒温时间为4h。采用最优条件制备的多孔水泥石合成滤料进行污水除磷试验，考察了pH值、投加量及初始磷浓度对多孔水泥石合成滤料除磷的影响。结果发现，在实验条件下，滤料对浓度5～10mg·L-1的含磷废水的去除率都在95.3%以上，最高达99.8%；废水浓度为50mg·L-1，pH在中性条件下

2、，每100mL投加2.5g滤料，磷去除率最高达89.6%。由吸附动力学过程分析可知，该滤料除磷吸附速率特性与准二级动力学模型拟合且吸附速率由颗粒内部扩散速率控制。关键词：水泥石；除磷；吸附作用；合成滤料；动力学中图分类号：X703文献标志码：A文章编号：1674-4764（2013）03-0115-06PreparationofPorousHardenedCementPasteSyntheticFilterMaterialandPhosphorusRemovalfromWastewaterby17Adsorption

3、ZhengJun1，2，YinXing1，LiuBaohe1，3，MengGuanhua1（1.SchoolofCivilEngineeringandArchitecture，AnhuiUniversityofTechnology，Ma’anshan243000，Anhui，P.R.China；2.BAFEngineeringTechnologyResearchCenterofAnhuiProvince，Ma’anshan243051，Anhui，P.R.China；3.SchoolofEnergyandEnviro

4、nment，SoutheastUniversity，Nanjing210096，P.R.China）Abstract：Takingcementasprimaryrawmaterial，aporoushardenedcementpastesyntheticfiltermaterialwaspreparedbysteamcuringinareactionkettle.Theoptimumprocesscombinationconditionofthefiltermaterialwasdetermined.Byorthog

5、onalexperiment，theoptimalcombinationsoftechnicalconditionsweredetermined：water-solidratiois0.25，andpore-formingagent/cementequalsto0.3withsteamingtemperatureat180°Cinthereactionkettlefor4h.EffectsofpHvalue，dosingquantity17andtheinitialconcentrationofphosphoruso

6、nphosphorusremovalbyusingthefiltermaterialswhichpreparedundertheoptimalconditionsweretested.Theresultsshowthatthephosphorusremovalratereachesallabove95.3%andthehighestoneis99.8%whentheinitialconcentrationofphosphorusis5～10mg·L-1.Whentheamountoffiltermaterialisa

7、dded2.5g/100mL，undertheexperimentalconditionofpHneutral，thetopphosphorusremovalratereaches89.6%whentheconcentrationis50mg·L-1.Theanalysisofadsorptionkineticprocessshowsthatthepseudo-second-orderkineticisfittedtotheadsorptioncharacteristicsoffiltermaterialandthe

8、adsorptionrateiscontrolledbytheintra-particlediffusion.Keywords：hardenedcementpaste；phosphorusremoval；adsorption；syntheticfiltermaterials；kinetics17吸附除磷技术因为其独特的高效快速，无二次污染，易操