Mg-Al-Fe类水滑石及其焙烧产物对酸性橙Ⅱ脱色性能的实验研究  

Study on decolorization of acid orangeⅡ by Mg-Al-Fe hydrotalcite-like compounds and its calcined product

作　　者：赵毅[1] 朱洪涛[1] 牛向楠[1] 李振海[2] 

机构地区：[1]华北电力大学环境科学与工程学院,河北保定071003 [2]河北省电力研究院,河北石家庄050021

出　　处：《华北电力大学学报（自然科学版）》2011年第1期107-112,共6页Journal of North China Electric Power University：Natural Science Edition

摘　　要：采用共沉淀法合成出一系列镁铝铁摩尔比不同的碳酸根型类水滑石(HTLCs),经500℃高温煅烧制备出镁铝铁复合氧化物HTLCs-500,并用X-射线、红外光谱对它们进行表征。考查了吸附剂投加量、反应时间、初始pH值等因素对二者处理阴离子染料酸性橙Ⅱ模拟废水效果的影响。实验结果表明:镁铝铁摩尔比为3/0.9/0.1制得的HTLCs对酸性橙Ⅱ的脱色效果最好;在最佳条件下,HTLCs及HTLCs-500对70mg.L-1的酸性橙Ⅱ模拟废水的脱色率分别可达99.88%和99.16%;HTLCs-500在脱色时投加量更少,吸附更迅速,适应的pH范围更广,脱色性能更好;四次再生后的HTLCs-500对酸性橙Ⅱ的脱色率仍可达90%以上。A series of CO2-3-type Mg-Al-Fe hydrotalcite-like compounds（HTLCs）with different Mg/Al/ Fe molar ratios were synthesized by co-precipitation,and parts of the synthesized clays were calcined under 500 ℃ to obtain the corresponding Mg-Al-Fe-O mixed oxides（HTLCs-500）.The Mg-Al-Fe hydrotalcite-like compounds and Mg-Al-Fe-O mixed oxides were charaterized by XRD and FT-IR respectively.The effects of adsorption time,sorbent dosage,initial pH value on decoloration efficiency of simulated Acid OrangeⅡdye wastewater were investigated.The results show that the decolorization effect is the best when Mg/Al/ Fe molar ratio is 3/0.9/0.1;Under the best conditions,the decoloration efficiencies of simulated wastewater containing 70 mg·L^-1 of Acid OrangeⅡwith Mg-Al-Fe hydrotalcite-like compounds and its calcined product reache 99.16% and 99.88% respectively;The latter possesses more advantages with less dosage,shorter reaction time and in wider range of pH;The decoloration efficiencies of HTLCs-500 four times recovered after adsorption of Acid Orange Ⅱcan still reach 90%.

关 键 词：Mg-Al-Fe类水滑石 酸性橙Ⅱ 吸附 脱色 焙烧 

分 类 号：X131.2[环境科学与工程—环境科学]