摘要
用氧氯化锆溶液交联羧甲基葡甘聚糖制得新型吸附材料—羧甲基葡甘聚糖锆凝胶球。探究了凝胶球对磷酸根的吸附性能,考察了羧甲基葡甘聚糖浓度、氧氯化锆浓度、吸附时间、pH值、温度和磷酸根浓度对吸附的影响。结果表明:298K时,凝胶球对磷酸根的吸附9h达平衡,当CMKGM和氧氯化锆浓度均为2.0%,磷酸根初始浓度为600mg·L-1,pH为2.5时,吸附量为186.65mg/g。利用Langmuir方程拟合实验数据,发现该方程适合于所研究的吸附体系。该体系为吸热体系,升温有利于吸附。
The carboxymethyl glucomannan zirconium gel micropheres（ CMKGM-ZrO2 ） were prepared by crosslinking Zirconium ox-ychloride solution and carboxyl methyl konjac glucomannan（ CMKGM） which carboxyl-methyl rectified through konjac Glucomannan （KGM）. The adsorption properties of CMKGM-ZrO2 for phosphate were studied. And several parameters were investigated respec-tively,including the concentration of CMKGM, ZrOCl2 , adsorption time, temperature, and phosphate concentration. The results showed that：When the temperature was 298K,the adsorption equilibrium could be established about 9 hours. When the concentra-tion of CMKGM was 2. 0%,the mass ratio of ZrOCl2 was 2. 0%,the phosphate concentration was 600mg＆#183;L-1 ,pH was 2. 5,adsorp-tion capacity reached 186. 65 mg/g. Experimental data was fitted by using the Langmuir equation,found he equation was suitable for the adsorption system. This system was an endothermic system,heating was favorable for adsorption.
出处
《化学研究与应用》
CAS
CSCD
北大核心
2014年第6期816-821,共6页
Chemical Research and Application
基金
四川省教育厅自然科学重点项目(12ZA084)资助
关键词
葡甘聚糖
羧甲基化
锆凝胶球
磷酸根
吸附
Konjac Glucomannan （ KGM ）
carboxyt methyl
phosphate
zircon gel mierophere
adsorption
