高温改性凹凸棒石对Cr(Ⅵ)的吸附研究  

Study on adsorption of Cr^(6+) in solution with attapulgite clay modified at high temperature

作　　者：郑建东[1] 常彬彬[1] 吴霖生[1] 

机构地区：[1]滁州学院材料与化学工程学院,滁州239000

出　　处：《化工新型材料》2012年第12期76-78,共3页New Chemical Materials

基　　金：安徽省教育厅自然科学研究重点项目(KJ2012A213);滁州学院校级重点教研项目(2011jyz007);安徽省应用化学省级重点学科建设(200802187C)

摘　　要：将凹凸棒石经低温煅烧改性,得到一种改性凹凸棒石材料,以提高凹凸棒石的吸附性能,通过BET(比表面积分析)和FT-IR(红外光谱仪)等实验技术及吸附含铬离子废水来表征凹凸棒石的性能。实验结果表明高温改性可以提高凹凸棒石的比表面积及其吸附性能;当改性温度为350℃时,可以获得最大的比表面积为140.7m2/g。当凹凸棒石用量为10g/L、溶液pH为2,吸附时间为1h,去除率可以达到98%。High temperature modification of attapulgite was studied to promote its adsorption capability. The at- tapulgite were characterized by BET, FT-IR techniques and were used to deal in wastewater with Cr6^＋. The results showed its adsorption capability and special surface area was improved after modified at high temperature. When the temperature was 350 ℃ ,the maximum surface area of 140.66m^2/g was achieved. The results showed that the dosage of the adsorbent was 10g/L, with the pH= 2. while the adsorption equilibrium timewas expected to last about 60 min, the adsorption rate of Cr6^＋ in wastewater over passed 98%.

关 键 词：凹凸棒石 高温改性 含铬Cr6+废水 

分 类 号：X703[环境科学与工程—环境工程]