金属盐类改性累托石的制备及吸附性能  

Preparation and adsorption performance of metal salt modified rectorite

作　　者：杨光忠[1] 汪媛[1] 王营茹[1] 

机构地区：[1]武汉工程大学化学与环境工程学院,湖北武汉430074

出　　处：《武汉工程大学学报》2014年第11期32-36,共5页Journal of Wuhan Institute of Technology

摘　　要：为得到吸附性能更优的废水处理材料,在最适宜改性条件下采用氯化铁溶液、碳酸锂草酸溶液和焦磷酸钠溶液分别制得铁盐改性累托石、锂盐改性累托石和钠盐改性累托石;取原累托石和三种盐类改性累托石为吸附剂,考察原累托石与改性累托石对亚甲基蓝、甲基紫、孔雀石绿和中性红4种染料废水的吸附效果,其中累托石用量0.1g,染料废水用量200mL质量浓度为100mg/L.结果表明:3种盐类改性累托石对4种染料废水的去除率和平衡吸附量明显优于原累托石,3种盐类改性累托石中铁盐改性累托石和锂盐改性累托石吸附效果优于钠盐改性累托石.对原累托石及3种盐类改性累托石进行扫描电镜分析,发现改性后累托石层间距明显增大,且改性过程并未改变累托石的片层结构.由此可见,盐类改性累托石具有优良的吸附性能,其中铁盐改性累托石和锂盐改性累托石的吸附性能更优.To get wastewater treatment materials with better adsorption performance ,the three kinds of salt modified rectorite of ferric ,lithium and sodium were prepared by using ferric chloride ,lithium car‐bonate ,oxalic acid and sodium pyrophosphate solution under the most suitable modification condition ;the raw rectorite and the three kinds of salt modified rectorite were used as adsorbents to treat dye wastewater containing methylene blue ,methyl violet ,malachite green and neutral red with rectorite dosage of 0 .1 g ,dye wastewater dosage of 200 mL and dye wastewater concentration of 100 mg/L .The results show that the removal rate and the equilibrium adsorption capacity of the three kinds of salt modified rectorite on the four dye wastewater are much better than those of the raw rectorite;the ad‐sorption effect of ferric salt modified rectorite and lithium salt modified rectorite on the four dye wastewater are better than that of sodium salt modified rectorite .After scanning electron microscope analyses of the raw rectorite and the three kinds of salt modified rectorite ,results show that the inter‐layer spacing of the three kinds of salt modified rectorite becomes much larger than that of the raw rec‐torite and the modified process doesn＇t change the structure of rectorite .This implies the adsorption performance of the three kinds of salt modified rectorite is excellent ;moreover ,the adsorption perform‐ance of ferric and lithium salt modified rectorite is better than that of the sodium salt modified rectorite .

关 键 词：累托石 改性 染料废水 吸附 

分 类 号：X703[环境科学与工程—环境工程]