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《Environmental Science and Management》 2008-04
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Study on Fluoride Removal from Drinking Water by Modified Bamboo Charcoal

You Fang,Peng Bing,Chai Liyuan,Gao Huimei,Mao Aili(School of Metallwgical Science and Engineering,Central South University,Changsha 410083,China)  
Comparison of defluorination effect by bamboo charcoals with different manufactories was conducted in this study.The results of experiments indicated that effect of mechanical bamboo charcoal of Lishui,Zhejiang on removal rate of F-in shaking bed for 1h was the best in all the bamboo charcoals,removal rate of F-achieved 47.8% under conditions of initial F-concentration 10 mg·L-1,solid-to-liquid ratio 3:100,pH value 4.0,at 25 ℃ and shaking rate 100 rpm.In the optimizing experiments of directly adsorption of F-with the mechanical bamboo charcoal,effects of parameters on defluorination were investigated in detail.The results show that pH value was an important factor for the removal of F-,and the best value is 4.Obvious effect of solid-to-liquid ratio on removal of F-was found that the removal proportion enchanced with the increase of solid-to-liquid ratio under the adsorption time 1 h.Relationship between initial F-concentration and adsorptive ability of bamboo charcoals was nearly liner.After modified by Al2(SO4)3,bamboo charcoals were also improved for the removal of F-obviously.But compared with those modified by Fe2(SO4)3,the removal proportions of bamboo charcoals were not increased obviously except the mechanical bamboo charcoals(A).After modified by MgSO4,all kinds of bamboo charcoals decreased their abilities of F-removal.After modified by Fe2(SO4)3,all kinds of bamboo charcoals were increased for the removal of F-obviously,the mechanical of Lishui,Zhejiang was improved to 91.8% and remained F-concentration of 0.86 mg·L-1,which satisfied the regulation of local government.
【Fund】: 国家科技支撑计划项目课题(项目编号:2007BAC25B01)
【CateGory Index】: TU991.2
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