交联羧甲基葡甘聚糖凝胶对Cr^(3+)的吸附性能  

Study on the Cr^(3+) Adsorption Behaviour of Crosslinked Carboxymethyl Konjac Glucomannan Gel

作　　者：段宗仕[1] 段丽丽[1] 王碧[1] 

机构地区：[1]内江师范学院化学与生命科学学院,四川内江641100

出　　处：《内江师范学院学报》2010年第6期46-48,共3页Journal of Neijiang Normal University

基　　金：内江师范学院自然科学重点项目(项目编号:08NJZ-10)

摘　　要：研究了新型吸附材料交联羧甲基葡甘聚糖凝胶对Cr3+的吸附特性,分别考察了时间、pH、温度、Cr3+的浓度对交联羧甲基葡甘聚糖凝胶吸附Cr3+的影响,并利用红外光谱表征了交联羧甲基葡甘聚糖凝胶-Cr3+的结构.结果表明:交联羧甲基葡甘聚糖对Cr3+的吸附在10h基本达到平衡;pH和温度对交联羧甲基葡甘聚糖凝胶吸附Cr3+有明显的影响;Cr3+的吸附量在pH6.00达最大值;在25～45℃范围内,随温度的升高,Cr3+的吸附量逐渐升高而趋于饱和;45℃下,在HAc-NaAc介质中,当Cr3+的质量浓度为240mg/L,pH6.0时,吸附容量达到97.5mg/g.In the issue,the adsorption characteristics of new absorbent material corsslinked carboxymethyl konjac glucomannan gel to Cr3＋ were studied. Meanwhile,the characteristics of adsorption capability under different times,pH values,temperatures as well as the concentration of Cr3＋ were investigated and the structure of conrsslinked curboxymethyl konjac glucomannan to Cr3＋ was demonstrated by IR. The results showed：the adsorption of conrsslinked curboxymethyl konjac glucomannan to Cr3＋ tend to be balance after 10 hours; pH value and temperature obviously influence the adsorption characteristics of conrsslinked curboxymethyl konjac glucomannan to Cr3＋; the adsorption to Cr3＋ rises to the top in the pH 6.00 and tends to be steady along with the increase of temperature. In the medium of HAc-NaAc,the adsorption capacity is as high as 97.5mg/g at the temperature of 318 K and pH 6.0 when the concentration of Cr3＋ is 240mg/L.

关 键 词：交联羧甲基葡甘聚糖 凝胶 铬(Cr3+) 吸附性能 

分 类 号：O647.311[理学—物理化学]