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| 交联羧甲基魔芋葡甘聚糖吸附重金属离子的研究 | |
| 引用本文： | 牛春梅,吴文辉,王著,李淑敏,王建全. 交联羧甲基魔芋葡甘聚糖吸附重金属离子的研究[J]. 离子交换与吸附, 2006, 22(5): 402-408 |
| 作者姓名： | 牛春梅 吴文辉 王著 李淑敏 王建全 |
| 作者单位： | 1. 北京理工大学材料科学与工程学院,北京,100081;河北科技大学材料科学与工程学院,石家庄,050018 2. 北京理工大学材料科学与工程学院,北京,100081 3. 河北科技大学化学与制药工程学院,石家庄,050018 |
| 基金项目： | 中国石油化工总公司资助项目 |
| 摘 要： | 以异丙醇为分散剂,环氧氯丙烷为交联剂,在碱性介质中由一氯乙酸和魔芋葡甘聚糖(KGM)反应,制备了取代度为0.265和0.550的两种交联羧甲基魔芋葡甘聚糖(CMKGM),并将其用于吸附溶液中Cu2 、Pb2 和Cd2 。结果表明,CMKGM对3种重金属离子的吸附约在20min内达到平衡,与金属离子类型无关,吸附遵从二级动力学方程;pH对吸附量影响较大,适宜范围为5~6;吸附能较好地服从Langmuir等温吸附方程,CMKGM(DS=0.550)吸附Pb2 的最大吸附容量(Qm)为41.7mg/g,Langmuir常数(b)为0.305mg/L,均大于Cu2 和Cd2 相应值;再生后的CMKGM吸附性能好,脱吸附百分率高。 |
| 关 键 词： | 交联羧甲基魔芋葡甘聚糖 重金属离子 等温吸附 动力学 |
| 文章编号： | 1001-5493(2006)05-0402-07 |
| 收稿时间： | 2005-12-17 |
| 修稿时间： | 2005-12-17 |
STUDY ON ADSORPTION OF HEAVY METAL IONS BY CROSSLINKED CARBOXYMETHYL KONJAC GLUCOMANNAN |
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| NIU Chunmei,WU Wenhui,WANG Zhu,LI Shumin,WANG Jianquan. STUDY ON ADSORPTION OF HEAVY METAL IONS BY CROSSLINKED CARBOXYMETHYL KONJAC GLUCOMANNAN[J]. Ion Exchange and Adsorption, 2006, 22(5): 402-408 | |
| Authors: | NIU Chunmei WU Wenhui WANG Zhu LI Shumin WANG Jianquan |
| Affiliation: | 1. School of Material Science and Engineering, Beijing Institute of Technology Beijing 100081, China;2. School of Material Science and Engineering, Hebei University of Science and Technology, Shijiazhuang 050018, China;3. School of Chemical Engineering, Hebei University of Science and Technology Shijiazhuang 050018, China |
| Abstract: | Two kinds of crosslinked carboxymethyl konjac glucomannan (CMKGM) with degree of substitution (DS) 0.265 and 0.550 were prepared through reaction of monochloroacetic acid (MCA) and konjac glucomannan (KGM) under the conditions of isopropyl alcohol as dispersing agent , epichlorohydrin as crosslinking agent and alkaline as catalyst, and were used to adsorb Cu2 , Pb2 and Cd2 ions from the aqueous solutions. Regardless of the metal type, the adsorption capacity reached equilibrium state within 20min and adsorption followed second-order kinetic equation. There was significant effect of pH on adsorption, the appropriate pH range was 5~6. Langmuir equation could be better to describe the isothermal adsorption of three above-mentioned metal ions, the maximum adsorption capacity (Qm) and Langmuir constant (b) of CMKGM (DS=0.550) for Pb2 were 41.7mg/g and 0.305mg/L, these values were higher than those of Cu2 and Cd2 . CMKGM after regeneration has good adsorption performance and desorption percentage is high. |
| Keywords: | Crosslinked carboxymethyl konjac glucomannan Heavy metal ion Isothermal adsorption Kinetics |
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