4种填料对氨氮的吸附效果.pdf

LakeSci．(湖泊科学)，2008，20(6)：755—760 http：／／www．jlakes．org．E—mail：jlakes@niglas．ac．cn ~2008byJournalofLakeSciences 4种填料对氨氮的吸附效果 金相灿 ，贺 凯。一-，卢少勇 ，胡小贞，李胜男 (1：中国环境科学研究院湖泊生态环境创新基地，国家环境保护湖泊污染控制重点实验室，北京 100012) (2：吉林建筑1二程学院市政与环境工程学院，长春 130021) 摘 要：氮是引发湖泊富营养化的重要元素之一，湖泊外源和内源氮的去除对湖泊富营养化的控制非常关键，其中填料对氨 氮的去除是湖泊外源控制的重要途径．研究T4种填料(天然沸石 、陶粒 、蛭石和土壤)对氨氮的吸附行为、填料去除氨氮的主 要途径 以及溶液中pH值和温度对氨氮去除率的影响．结果表明沸石对氨氮的吸附效果明显，蛭石次之，土壤与陶粒效果较差． 沸石去除氨氮的途径以离子交换作用为主，物理吸附作用很小；陶粒 、土壤和蛭石3种填料的离子交换作用和物理吸附作用的 效果相当 4种填料的吸附量在温度为15—35*C内均随温度的升高而减小，在pH值为3—9范围内随pH值升高而增大，振荡6h均 达到吸附平衡 关键词：填料：氧氮；吸附：解吸；影响因素 Adsorptioneffectofammoniabyfourfillings JIN Xiangcan ，HEKai一，LU Shaoyong ，HU Xiaozhen LIShengnan2 (1：StateEnvironmentalProtectionKeyLaboratoryforLakePollutionControl,ResearchCenterofLakeEnvironment，Chinese ResearchAcadem)，ofEm，ironmentSciences，Beijing100012，PRChina) (2：CollegeofEnvironmentalandNaturalResources，JilinUniversity，Changchun130021， China) Abstract：NitrogenisonekindofimportantelementsrelatedtoeutrophicationoflakesTheremovalofexteriorpollutionsourceand interiorpollutionsourceissignificantforeutrophicationcontroloflakesAmmoniaremovalbyfillingsisanimportantwaysofrthe controlofexteriorpollutionsourceoflka es．Theammoniaadsorptionbehavioroffourkindsoffillings，suchassavagenesszeolite， haydite，vermiculiteand soilwere investigated Th emainwayofammoniaremovalby fillings，theeffectsofsolutionpH na d temperatureonremovalrateofammoniawereobserved Theresultsindicatedthatthereweresing ificantdifferencesbetweenzeolite andotherfillings，andthesorptionefficiencyintheorderwerezeolite，vermiculi，soilandhaydite．Th eionexchangefunctionisthe mainwayofremovingammoniabyzeolite，zeolitehastheworstsorptionability,whereasotherthreefillingshavealmostthesame sorption and ion exchangecapacities．Inaddition，adsorption capacitiesofthesefourfillingsdecreasedas temperature increased between I5-35℃ ：asthepH valuesincreasedattherna geof3-9theadsoprtioncapacitiesofthesefourfillingsincreasetoo．All adsoprtionexperimen