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1、攀枝花學(xué)院本科畢業(yè)論文酸改性粉煤灰吸附除磷性能研究學(xué)生姓名：王碩學(xué)生學(xué)號：200810903031院（系）：生物與化學(xué)工程學(xué)院年級專業(yè)：2008級環(huán)境工程指導(dǎo)教師：陳孝娥講師助理指導(dǎo)教師：二O—二年六月我國是個產(chǎn)煤大國，以煤炭為電力生產(chǎn)基本燃料。近年來，粉煤灰的排放量急劇增加，而粉煤灰的綜合利用率很低，人量的粉煤灰不僅造成堆積，片用大量土地，而且造成環(huán)境的極大破壞，粉煤灰的綜合利用迫在眉睫。排入地表水體的磷酸鹽是引起水體富營養(yǎng)化的主要因素之一，因此，廢水排放時磷的含量需達(dá)到國家規(guī)定的標(biāo)準(zhǔn)。含磷廢水達(dá)標(biāo)排放一般進(jìn)行深度處理，粉煤
2、灰直接用來處理含磷廢水效果不理想。為進(jìn)一步提高粉煤灰的吸附性能，嘗試用酸對粉煤灰改性。本論文對酸改性粉煤灰吸附除磷性能進(jìn)行了研究，探究了磷的初始濃度，改性粉煤灰的投加量，反應(yīng)時間，反應(yīng)溫度，焙燒溫度和PH值對吸附效果的影響。實驗結(jié)果表明：在相同的實驗條件下，酸改性粉煤灰對磷的去除率都要好于未改性粉煤灰對磷的去除率。對50mg/L含磷廢水，酸改性粉煤灰的投加量為1.5g時去除率為95.62%,吸附時間50分鐘時去除率為95.32%,反應(yīng)溫度常溫時去除率為94.42%,焙燒溫度100°C時去除率為94.33%,PH+性時去除率為9
3、2.18%。關(guān)鍵詞酸改性，粉煤灰，吸附，含磷廢水ABSTRACTChinawasalargecoal-producingcountry,thebasicfuelofcoalforelectricityproduction.Inrecentyears,flyashemissionssharplyincreased,andthecomprehensiveutilizationofflyashwasverylow,andalotofflyashnotonlycausedbytheaccumulation,andalotoflandb
4、eentakeup,andcausedgreatdamagetotheenvironment,socomprehensiveutilizationofflyashbecameimminent.Dischargedintosurfacewaterbodies,phosphatewasoneofthemainfactorsthatcausedeutrophication,therefore,thecontentofphosphorusinthewastewaterdischargeneededtoreachthestatestan
5、dards.Phosphoruswastewaterdischargestandardsgenerallydepthtreatmentofflyashdirectlytodealwiththephosphorus-containingwastewatertheresultwasnotideaLTofurtherenhancetheadsorptionpropertiesofflyash,wetriedtomodifyflyashwithacid.Inthisthesis,discussedtheremovalofacid-mo
6、difiedflyashadsorbphosphorus,exploredtheeffectofthephosphorusconcentrationoftheinitialdosageofmodifiedflyash,mixingtime,reactiontemperature,calcinationtemperatureandPHoftheadsorption.experimentalresultsshowthat:onthesameexperimentalconditions,theacid-modifiedflyasho
7、ntheremovalrateofphosphorusshouldbebetterthantheunmodifiedflyashontheremovalrateofphosphorus.The50mg/Lphosphorous-containingwastewater,acidmodifiedflyashdosagewas1.5gwhenremovalratewas95.62%，theadsorptiontimeof50minutesduringremovalratewas95.32%,reactiontemperaturew
8、asroomtemperaturewhenremovalratewas94.42%,theroastingtemperature100centigraderemovalratewas94.33%.PHwasneutralwhentheremovalratewas92.18%.
