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1、改性粉煤灰基LindetypeF(K)沸石對水中磷酸根吸附研究AdsorptionofPhosphateinWaterbyModifiedFlyAshBaseLindeTypeF(K)Zeolite摘要隨著工農(nóng)業(yè)生產(chǎn)及城市生活污水中的貪磷量升高，江河湖泊水庫的污染及富營養(yǎng)化也成為我國其至全球的重大問題之一。本文以氫氧化鈉和HDTMA(十六烷基三甲基溴化銨)為改性劑，對粉煤灰進行改性，以SEM表征粉煤灰改性前后的微觀形貌。研究含磷廢水的pH值、改性粉煤灰沸石吸附劑的投加量和系統(tǒng)溫度對改性沸石吸附性能的影響。根據(jù)實驗數(shù)據(jù)，擬合等溫吸附模型和吸附動力學(xué)模型。主要研宂結(jié)果如下：(1)從SE
2、M圖屮可以看出，粉煤灰沸石的表面擁有人量的空隙，這有利于改性粉煤灰沸石對水中磷酸根的吸附。(2)吸附過程中，隨著改性粉煤灰沸石的投加量的增大，磷酸根的去除率逐漸增大。該有具體的量化數(shù)值(3)吸附過程中，溶液的pH值對改性粉煤灰沸石吸附率的影響很大。隨著溶液pH值的增人，磷酸根的去除率有著明顯的增大。那一直到14??(4)吸附過程中，溫度對磷酸根離子的吸附效果影響較大，隨著溫度的增高，改性粉煤灰沸石對水中磷酸根的吸附效率變高，吸附率也變高。那1000°C??(5)改性粉煤灰沸石對水中磷酸根的吸附過程符合Frcundlich吸附等溫模型和準二級吸附動力學(xué)。關(guān)鍵詞：粉煤灰；改性；沸石；H
3、DTMA；PO?-;吸附AbstractWiththeindustrialandagriculturalproductionandurbansewageinthephosphoruscontentincreased，riversandlakesreservoirpollutionandeutrophicationhasbecomeChinaandevenoneofthemajorglobalproblems.Inthispaper,flyashwasmodifiedbysodiumhydroxideandHDTMA(cetyltrimethylammoniumbromide)asm
4、odifier.ThemicrostructureofflyashwasmodifiedbySEM.TheeffectsofthepHvalueofphosphorus-containingwastewater，thedosageofmodifiedflyashzeoliteadsorbentandtheeffectofsystemtemperatureontheadsorptionperformanceofmodifiedflyashwerestudied.Accordingtotheexperimentaldata,theisothermaladsorptionmodelwas
5、fitted.Themainfindingsareasfollows:(1)ItcanbeseenfromtheSEMdiagramthatthesurfaceoftheflyashzeolitehasalargeamountofvoids，whichfacilitatestheadsorptionofphosphateinthemodifiedflyashzeolite.(2)Intheprocessofadsorption，theremovalrateofphosphateincreasedwiththeincreaseofthedosageofmodifiedflyashze
6、olite.(3)Duringtheadsorptionprocess，thepHvalueofthesolutionhasagreatinfluenceontheadsorptionrateofmodifiedflyashzeolite.AsthepHofthesolutionincreases，theremovalrateofphosphateissignificantlyincreased.(4)Intheprocessofadsorption，theadsorptioneffectofphosphateionsonthephosphatewashigherandtheads
7、orptionrateofthemodifiedflyashzeoliteincreasedwiththeincreaseoftemperature.(5)TheadsorptionprocessofthemodifiedflyashzeolitetothephosphateisinaccordancewiththeFreundlichadsorptionisothermalmodelandthequasi?secondaryadsorptionkinetics.Ke
