Zhi-rong LIU , Li-min ZHOU , Peng WEI , Kai ZENG , Chuan-xi WEN , Hui-hua LAN
{"title":"泥炭对重金属离子的竞争吸附","authors":"Zhi-rong LIU , Li-min ZHOU , Peng WEI , Kai ZENG , Chuan-xi WEN , Hui-hua LAN","doi":"10.1016/S1006-1266(08)60054-1","DOIUrl":null,"url":null,"abstract":"<div><p>The uptake capacities, and the adsorption kinetics, of copper, Cu(II), nickel, Ni(II), and cadmium, Cd(II), on peat have been studied under static conditions. The results show that the adsorption rates are rapid: equilibrium is reached in twenty minutes. The adsorption of copper, nickel and cadmium is pH dependent over the pH range from 2 to 6. The adsorption kinetics can be excellently described by the Elovich kinetic equation. The adsorption isotherm fits a Langmuir model very well. The adsorption capacities follow the order Cu<sup>2+</sup> > Ni<sup>2+</sup> > Cd<sup>2+</sup> in single-component systems and the competitive adsorption capacities fall in the decreasing order Cu<sup>2+</sup> > Ni<sup>2+</sup> > Cd<sup>2+</sup> in multi-component systems. The adsorption capacities of these three heavy metal ions on peat are consistent with their observed competitive adsorption capacities.</p></div>","PeriodicalId":15315,"journal":{"name":"Journal of China University of Mining and Technology","volume":"18 2","pages":"Pages 255-260"},"PeriodicalIF":0.0000,"publicationDate":"2008-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60054-1","citationCount":"57","resultStr":"{\"title\":\"Competitive adsorption of heavy metal ions on peat\",\"authors\":\"Zhi-rong LIU , Li-min ZHOU , Peng WEI , Kai ZENG , Chuan-xi WEN , Hui-hua LAN\",\"doi\":\"10.1016/S1006-1266(08)60054-1\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>The uptake capacities, and the adsorption kinetics, of copper, Cu(II), nickel, Ni(II), and cadmium, Cd(II), on peat have been studied under static conditions. The results show that the adsorption rates are rapid: equilibrium is reached in twenty minutes. The adsorption of copper, nickel and cadmium is pH dependent over the pH range from 2 to 6. The adsorption kinetics can be excellently described by the Elovich kinetic equation. The adsorption isotherm fits a Langmuir model very well. The adsorption capacities follow the order Cu<sup>2+</sup> > Ni<sup>2+</sup> > Cd<sup>2+</sup> in single-component systems and the competitive adsorption capacities fall in the decreasing order Cu<sup>2+</sup> > Ni<sup>2+</sup> > Cd<sup>2+</sup> in multi-component systems. The adsorption capacities of these three heavy metal ions on peat are consistent with their observed competitive adsorption capacities.</p></div>\",\"PeriodicalId\":15315,\"journal\":{\"name\":\"Journal of China University of Mining and Technology\",\"volume\":\"18 2\",\"pages\":\"Pages 255-260\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"2008-06-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/S1006-1266(08)60054-1\",\"citationCount\":\"57\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of China University of Mining and Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/S1006126608600541\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of China University of Mining and Technology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1006126608600541","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Competitive adsorption of heavy metal ions on peat
The uptake capacities, and the adsorption kinetics, of copper, Cu(II), nickel, Ni(II), and cadmium, Cd(II), on peat have been studied under static conditions. The results show that the adsorption rates are rapid: equilibrium is reached in twenty minutes. The adsorption of copper, nickel and cadmium is pH dependent over the pH range from 2 to 6. The adsorption kinetics can be excellently described by the Elovich kinetic equation. The adsorption isotherm fits a Langmuir model very well. The adsorption capacities follow the order Cu2+ > Ni2+ > Cd2+ in single-component systems and the competitive adsorption capacities fall in the decreasing order Cu2+ > Ni2+ > Cd2+ in multi-component systems. The adsorption capacities of these three heavy metal ions on peat are consistent with their observed competitive adsorption capacities.
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