CAJ | 학술논문

通过对实验室现有工业级聚合氯化铝进行碱化度分析,向多个化学试剂厂调研得出,现场常用聚合氯化铝的碱化度在1.5~2.7之间.通过合成不同碱化度(2.0~2.4)的聚合氯化铝,对模拟成垢水进行系统的混凝实验,考察碱化度对聚合氯化铝混凝除硅的影响.研究表明,碱化度会决定铝形态的分布,进而影响混凝除硅的效果.随着碱化度的升高,Ala含量逐渐降低,Alb含量先增大后减小,Alc含量逐渐增加.对模拟污水处理后,残余硅酸形态有很大差异,用聚合氯化铝(2.0)除硅后Sia含量变为32.1mg/L,Sic含量变为15.3mg/L;聚合氯化铝(2.2)除硅后Sia含量变为28.71mg/L,Sic含量变为30.5mg/L;聚合氯化铝(2.4)除硅后Sia含量变为22.4mg/L, Sic含量变为 41.2mg/L.聚合氯化铝(2.0)除硅后 Sia降低的比例最大,聚合氯化铝(2.4)除硅后 Sic降低的比例最大.随着碱化度的升高,全硅剩余含量依次为 47.4mg/L、59.5mg/L、63.6mg/L,表明碱化度越低,除硅效果越好.
통과대실험실현유공업급취합록화려진행감화도분석,향다개화학시제엄조연득출,현장상용취합록화려적감화도재1.5~2.7지간.통과합성불동감화도(2.0~2.4)적취합록화려,대모의성구수진행계통적혼응실험,고찰감화도대취합록화려혼응제규적영향.연구표명,감화도회결정려형태적분포,진이영향혼응제규적효과.수착감화도적승고,Ala함량축점강저,Alb함량선증대후감소,Alc함량축점증가.대모의오수처리후,잔여규산형태유흔대차이,용취합록화려(2.0)제규후Sia함량변위32.1mg/L,Sic함량변위15.3mg/L;취합록화려(2.2)제규후Sia함량변위28.71mg/L,Sic함량변위30.5mg/L;취합록화려(2.4)제규후Sia함량변위22.4mg/L, Sic함량변위 41.2mg/L.취합록화려(2.0)제규후 Sia강저적비례최대,취합록화려(2.4)제규후 Sic강저적비례최대.수착감화도적승고,전규잉여함량의차위 47.4mg/L、59.5mg/L、63.6mg/L,표명감화도월저,제규효과월호.
By analyzing the alkalization degree of existing industrial-grade polymeric aluminum chloride in the laboratory and investigating several chemical reagent factories,we obtained that the alkalization degree of polymeric aluminum chloride commonly used on site is between 1.5—2.7. By synthesizing polymeric aluminum chloride with different alkalization degrees (2.0—2.4),we conducted a systematic coagulation experiment on the simulation of scale-forming water,and investigated the influence of alkalization degree on the coagulation silica removal of polymeric aluminum chloride. The results show that the alkalization degree will determine the distribution of aluminum speciation and therefore influence the effect of coagulation silicon removal. As the alkalization degree increases,the content of Alagradually decreases,the content of Albfirst increases and then decreases,while the content of Alc gradually increases. After simulation of wastewater treatment,the residual silicate speciation is largely different. After silicon removal of polymeric aluminum chloride (2.0),the content of Sia changes to 32.1mg/L,and the content of Sic changes to 15.3mg/L;after silicon removal ofpolymeric aluminum chloride (2.2),the content of Sia changes to 28.71mg/L,and the content of Sic changes to 30.5mg/L;after silicon removal of polymeric aluminum chloride (2.4),the content of Sia changes to 22.4mg/L,and the content of Sic changes to 41.2mg/L. The proportion in the decrease of Sia is the largest after silicon removal of polymeric aluminum chloride (2.0),and the proportion in the decrease of Sic is the largest after silicon removal of polymeric aluminum chloride (2.4). With the increase of alkalization degree,the total residual silicon contents are respectively 47.4mg/L,59.5mg/L and 63.6mg/L. Within the author's scope of research,the lower the alkalization degree,the better the effect of silica removal.