资源描述：
《酸改性粉煤灰吸附除磷性能研究》由会员上传分享，免费在线阅读，更多相关内容在工程资料-天天文库。
1、攀枝花学院本科毕业论文酸改性粉煤灰吸附除磷性能研究学生姓名：王硕学生学号：200810903031院（系）：生物与化学工程学院年级专业：2008级环境工程指导教师：陈孝娥讲师助理指导教师：二O—二年六月我国是个产煤大国，以煤炭为电力生产基本燃料。近年来，粉煤灰的排放量急剧增加，而粉煤灰的综合利用率很低，人量的粉煤灰不仅造成堆积，片用大量土地，而且造成环境的极大破坏，粉煤灰的综合利用迫在眉睫。排入地表水体的磷酸盐是引起水体富营养化的主要因素之一，因此，废水排放时磷的含量需达到国家规定的标准。含磷废水达标排放一般进行深度处理，粉煤
2、灰直接用来处理含磷废水效果不理想。为进一步提高粉煤灰的吸附性能，尝试用酸对粉煤灰改性。本论文对酸改性粉煤灰吸附除磷性能进行了研究，探究了磷的初始浓度，改性粉煤灰的投加量，反应时间，反应温度，焙烧温度和PH值对吸附效果的影响。实验结果表明：在相同的实验条件下，酸改性粉煤灰对磷的去除率都要好于未改性粉煤灰对磷的去除率。对50mg/L含磷废水，酸改性粉煤灰的投加量为1.5g时去除率为95.62%,吸附时间50分钟时去除率为95.32%,反应温度常温时去除率为94.42%,焙烧温度100°C时去除率为94.33%,PH+性时去除率为9
3、2.18%。关键词酸改性，粉煤灰，吸附，含磷废水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%.
