| Preparation of solid polyferric sulfate from pyrite cinders and its structure feature |
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| 作者姓名： | 郑雅杰 龚竹青 陈白珍 刘立华 |
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| 作者单位： | College of Metallurgical Science and Engineering，College of Metallurgical Science and Engineering，College of Metallurgical Science and Engineering，College of Metallurgical Science and Engineering Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China，Central South University，Changsha 410083，China |
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| 摘 要： | 1 INTRODUCTIONCoagulationisanessentialprocessintheoverallsolid liquidseparationschemeinwaterandadvancedwastewatertreatment .Hydrolyzingmetalsalts ,suchasferriccoagulants ,canpromotetheformationofag gregates.WhenFesaltsaredissolvedinwater,themetalironhydrates ,coordinatingsixwatermoleculesandforminganaquometalion ,canthenhydrolyzeandformmonomericand polymericferricspecies ,whichishighlydependentonpHofthesolution .Itispossibletodescribetheformationofseveralhydrolysisspecies ,suchaspositiv…
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Preparation of solid polyferric sulfate from pyrite cinders and its structure feature |
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| ZHENG Ya jie,GONG Zhu qing,CHEN bai zhen,LIU Li hua.Preparation of solid polyferric sulfate from pyrite cinders and its structure feature[J].Transactions of Nonferrous Metals Society of China,2003,13(3). |
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| Authors: | ZHENG Ya jie GONG Zhu qing CHEN bai zhen LIU Li hua |
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| Abstract: | Acid leaching solution was obtained after mixing pyrite cinders with H2SO4, then heating the mixture of pyrite cinders and H2SO4 at 200-300 ℃, leaching the heated mixture with water and filtrating. Polyferric sulfate (PFS) solution was produced by adding suitable amounts of FeSO4*7H2O and NaClO3 into acid leaching solution. By concentrating and drying PFS solution, solid PFS with alkali degree of 6.40%-22.4% was prepared. Fe4.67(SO4)6(OH)2*20H2O in the solid PFS was discovered by XRD analysis. FT-IR spectroscopy shows that the absorption peaks at 3 400 cm-1 and 1 635 cm-1 arise from OH and absorption peaks at 998 cm-1 and 669 cm-1 come from Fe-OH in the solid PFS. |
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| Keywords: | pyrite cinders NaClO 3 oxidation solid polyferric sulfate structure feature |
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