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1、九江學(xué)院化學(xué)化工學(xué)院本科論文摘 要本文在總結(jié)國內(nèi)外聚硅酸類混凝劑的研究與發(fā)展的基礎(chǔ)上，以水玻璃、硫酸鋁、硫酸鐵為原料，制備無機(jī)高分子混凝劑—聚硅酸鋁鐵(簡稱PSAF)，并對該混凝劑的混凝除濁效能及對印染廢水的脫色效能進(jìn)行了研究和討論，從而為聚硅酸類混凝劑的工業(yè)化生產(chǎn)和工程應(yīng)用奠定了基礎(chǔ)。本文在酸性條件下制備聚硅酸，優(yōu)化了聚硅酸的制備工藝條件，系統(tǒng)研究了硅酸的聚合反應(yīng)過程中pH值、二氧化硅濃度、溫度等因素對聚硅酸聚合過程中的影響。采用自制的聚硅酸制備聚硅酸鋁鐵混凝劑。研究(Al+Fe)/Si摩爾比、Al/Fe摩爾比、攪
2、拌時(shí)間、投加量等因素對模擬懸濁水樣的除濁效能的影響。實(shí)驗(yàn)結(jié)果表明：聚硅酸鋁鐵混凝劑具有優(yōu)良的混凝除濁效能；在適宜的條件下，對活性染料模擬水樣、分散染料模擬水樣均有較好的脫色效果，對活性染料模擬水樣的脫色率最高可達(dá)88.48%，對分散染料模擬水樣的脫色率最高可達(dá)80.84%，與硫酸鋁、三氯化鐵、聚硅酸鋁、聚硅酸鐵相比，聚硅酸鋁鐵有較好的混凝除濁脫色效能。關(guān)鍵詞：聚硅酸，聚硅酸鋁鐵，印染廢水，混凝-2-九江學(xué)院化學(xué)化工學(xué)院本科論文AbstractTheresearchesrelatedtothedevelopmentofm
3、etal-polysilicatecomplexcoaulantwerereviewed.Thepolysilicatealuminumferric(PSAF)wasprparedbyusingwaterglass,aluminiumsulphate,ferricchlorideasrawmaterials;theviscosityascontrollingparameter.Coagulationpropertywasanalyzedanddiscussedsystematicallyontheturbidityre
4、movalandthedecorizationofdyeingwastewatercontainingreactiveredanddispersebrilliantbluedyes,whichcouldprovidethebasisforPSAF’sindustrialproductionandengineeringapplicationdevelopmentofbeingusedactually.Polymerizedsilicicacidwaspreparedunderacidicconditions.Thepro
5、cessesforthepraparationofpolymerizedsilicicacidwereoptimized,andtheviscositywasusedasthekeyindicatorofpolymerizationdegreeofpolymerizedsilicicacid.Theinfluencesoftemperature,pHvalue,SiO2concentration,anddifferentacidifiersontheviscosityweresystematicallyinvestig
6、ated.PSAFwithhighefficiencywaspraparedbyusingself-madepolymerizedsilicicacid,andtheprocessesofPSAFwereoptimized.The(Al+Fe)/Simoleratio,Al/Femoleratio,theviscosityofpolymerizedsilicicacid,agingtime,dosage,pHvalueonturbidityremovalanddyedecorizationwerestudied.The
7、resultshowedthat:PSAFhadexcellentcoagulationpropertyontheturbidityremoval;forthesyntheticreactiveredanddispersebrilliantbluedyewastewater,theuseofPSAFcouldachieve88.48%and80.48%ofdyeremovalefficiencyinappropriateconditions,respectively.PSAFwereevaluatedwithcompa
8、rationofdifferentcoagulantssuchasaluminumsulfate,ferricchloride,polysilicatealuminum,polysilicateferric.ThePSAFwasfoundtobemoreefficientonturbidityremovalanddyedecori
