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1、GAC對水中內(nèi)分泌干擾物雙酚A的吸附特性及動力學(xué)研究111112李若愚高乃云徐斌曹俊趙建夫樂林生(1同濟(jì)大學(xué)污染控制與資源化研究國家重點(diǎn)實(shí)驗(yàn)室,上海200092;2上海市自來水市北有限公司,上海200086)摘要研究了顆?；钚蕴?GAC)對水中內(nèi)分泌干擾物雙酚A(BPA)的吸附容量、吸附動力學(xué)及其影響因素。結(jié)果表明,GAC吸附容量大,吸附等溫線符合Langmuir和Freundlich模型;吸附容量受GAC粒徑的變化影響較大。Langmuir模型的最大吸附容量qm與粒徑dp關(guān)系為:ln(qm)=-0.5075@ln(dp)+14.07;Freundlich模型kf與dp關(guān)系為:
2、ln(kf)=-1.078ln(dp)+18.307。GAC對BPA為單分子層吸附,400min基本可達(dá)到平衡,且吸附速率變化符合擬二級動力學(xué)模型,dp與速率常數(shù)k2之間符合ln(k2)=-1.039ln(dp)-9.014;BPA初始濃度C0與k2關(guān)系式為1/k2=529.7C0-35979。關(guān)鍵詞雙酚A顆?；钚蕴课降葴鼐€吸附動力學(xué)內(nèi)分泌干擾物OnGACadsorptioncharacteristicsandkineticsofEDCsObisphenolAinwater111112LiRuoyu,GaoNaiyun,XuBin,CaoJun,ZhaoJianfu,LeLi
3、nsheng(1.StateKeyLaboratoryofPollutionControlandResourceReuse,TongjiUniversity,Shanghai200092,China;2.ShanghaiWaterworksShibeiCo.,Ltd.,Shanghai200086,China)Abstract:Theadsorptioncapacity,adsorptionkineticsandimpactfactorsofendocrinedisrup2tingchemicals(EDCs)ObisphenolA(BPA)inwaterongranulara
4、ctivatedcarbon(GAC)werein2vestigatedinthisstudy.TheresultsshowedthathighBPAadsorptioncapacitycouldbeachievedbyGAC.Moreover,theexperimentresultsofadsorptionisothermfittedLangmuirandFreundlichmodel.ThevariationofadsorptioncapacitywasinfluencedbyparticlediameterofGAC.Therela2tionbetweenthebigge
5、stcapacityqmofLangmuirmodelandparticlediametercouldbeexpressedas:ln(qm)=-0.5075ln(dp)+14.07,andtherelationbetweenthekfvalueofFreundlichmodelandparticlediametercouldbeexpressedas:ln(kf)=-1.078ln(dp)+18.307.Fromtheadsorp2tionkineticsexperiment,theadsorptionequilibriumcouldbeachievedin400minute
6、sforGAC.Bythecomparisonbetweendifferentadsorptionkinetics,itcouldbedrawnthatpseudosecondordermodelcouldbeusedtosimulatetheadsorptionprocesseffectively.Therelationbetweenthek2val2ueofthepseudosecondorderandparticlediametercouldbeexpressedas:ln(k2)=-1.039ln(dp)-9.014;whiletheinitialconcentrati
7、onofBPA(C0)was1/k2=529.7C0-35979.Keywords:BisphenolA;Granularactivatedcarbon;Adsorptionisotherm;AdsorptionkineOtics;Endocrinedisruptingchemicals雙酚A(BisphenolA,BPA)作為合成樹脂的組用,一旦進(jìn)入人體內(nèi),可引起精子量減少等生殖功成物質(zhì)原材料是重要的化工原料,它具有雌激素作能異常。美國國家環(huán)保局(USEPA)、日本、世界野生動物基金組織等
