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1、九江学院化学化工学院本科论文摘要本文在总结国内外聚硅酸类混凝剂的研究与发展的基础上，以水玻璃、硫酸铝、硫酸铁为原料，制备无机高分子混凝剂—聚硅酸铝铁(简称PSAF)，并对该混凝剂的混凝除浊效能及对印染废水的脱色效能进行了研究和讨论，从而为聚硅酸类混凝剂的工业化生产和工程应用奠定了基础。本文在酸性条件下制备聚硅酸，优化了聚硅酸的制备工艺条件，系统研究了硅酸的聚合反应过程中pH值、二氧化硅浓度、温度等因素对聚硅酸聚合过程中的影响。采用自制的聚硅酸制备聚硅酸铝铁混凝剂。研究(Al+Fe)/Si摩尔比、Al/Fe摩尔比、搅拌时间、投加量等因素对模拟悬浊水样的除浊效能的影响。实验结果表明：聚硅酸
2、铝铁混凝剂具有优良的混凝除浊效能；在适宜的条件下，对活性染料模拟水样、分散染料模拟水样均有较好的脱色效果，对活性染料模拟水样的脱色率最高可达88.48%，对分散染料模拟水样的脱色率最高可达80.84%，与硫酸铝、三氯化铁、聚硅酸铝、聚硅酸铁相比，聚硅酸铝铁有较好的混凝除浊脱色效能。关键词：聚硅酸，聚硅酸铝铁，印染废水，混凝-2-九江学院化学化工学院本科论文AbstractTheresearchesrelatedtothedevelopmentofmetal-polysilicatecomplexcoaulantwerereviewed.Thepolysilicatealuminumfe
3、rric(PSAF)wasprparedbyusingwaterglass,aluminiumsulphate,ferricchlorideasrawmaterials;theviscosityascontrollingparameter.Coagulationpropertywasanalyzedanddiscussedsystematicallyontheturbidityremovalandthedecorizationofdyeingwastewatercontainingreactiveredanddispersebrilliantbluedyes,whichcouldpro
4、videthebasisforPSAF’sindustrialproductionandengineeringapplicationdevelopmentofbeingusedactually.Polymerizedsilicicacidwaspreparedunderacidicconditions.Theprocessesforthepraparationofpolymerizedsilicicacidwereoptimized,andtheviscositywasusedasthekeyindicatorofpolymerizationdegreeofpolymerizedsil
5、icicacid.Theinfluencesoftemperature,pHvalue,SiO2concentration,anddifferentacidifiersontheviscosityweresystematicallyinvestigated.PSAFwithhighefficiencywaspraparedbyusingself-madepolymerizedsilicicacid,andtheprocessesofPSAFwereoptimized.The(Al+Fe)/Simoleratio,Al/Femoleratio,theviscosityofpolymeri
6、zedsilicicacid,agingtime,dosage,pHvalueonturbidityremovalanddyedecorizationwerestudied.Theresultshowedthat:PSAFhadexcellentcoagulationpropertyontheturbidityremoval;forthesyntheticreactiveredanddispersebrilliantbluedyewastewater,theuseofPSAFcouldachieve88.48%and80.48%ofdyeremovalefficiencyinappro
7、priateconditions,respectively.PSAFwereevaluatedwithcomparationofdifferentcoagulantssuchasaluminumsulfate,ferricchloride,polysilicatealuminum,polysilicateferric.ThePSAFwasfoundtobemoreefficientonturbidityremovalanddyedecoriza
