| 阴离子淀粉微球对Cd~(2+)的吸附及动力学研究 |
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| 引用本文： | 黄永如,李仲谨,王海峰,苗宗成,刘节根.阴离子淀粉微球对Cd~(2+)的吸附及动力学研究[J].食品科技,2010(1). |
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| 作者姓名： | 黄永如 李仲谨 王海峰 苗宗成 刘节根 |
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| 作者单位： | 陕西科技大学化学与化工学院; |
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| 基金项目： | 国家自然科学基金项目(50573046); 教育部轻化工助剂化学与技术重点实验室项目; 陕西科技大学研究生创新基金项目 |
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| 摘 要： | 以可溶性淀粉为原料,N,N′-亚甲基双丙烯酰胺(MBAA)为交联剂,采用反相悬浮聚合得到中性淀粉微球,再用Na3P3O9进行阴离子化得到阴离子淀粉微球,用红外光谱和扫描电镜对其进行表征分析。研究阴离子淀粉微球对Cd2+的吸附行为,考察了pH、时间等因素对其吸附率的影响。结果表明:阴离子淀粉微球对Hg2+的吸附行为既符合Langmuir等温吸附方程又符合Freundlich等温吸附方程;同时,分别采用拟一级模型和拟二级模型考察了吸附动力学,并计算了这些动力学模型的速率常数,实验数据和拟二级模型计算结果之间有较好的相关性。
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| 关 键 词： | 阴离子淀粉微球 吸附 Cd2+ 动力学 |
Study on adsorption and kinetics of anion starch microspheres for Cd~(2+) |
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| HUANG Yong-ru,LI Zhong-jin,WANG Hai-feng,MIAO Zong-cheng,LIU Jie-gen.Study on adsorption and kinetics of anion starch microspheres for Cd~(2+)[J].Food Science and Technology,2010(1). |
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| Authors: | HUANG Yong-ru LI Zhong-jin WANG Hai-feng MIAO Zong-cheng LIU Jie-gen |
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| Affiliation: | HUANG Yong-ru,LI Zhong-jin,WANG Hai-feng,MIAO Zong-cheng,LIU Jie-gen (College of Chemistry , Chemical Engineering,Shaanxi University of Science & Technology,Xi\'an 710021) |
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| Abstract: | Soluble starch as raw materials,N,N'-methylenebisacrylamide (MBAA) as a cross-linker,neutral starch microspheres were synthesized by inverse suspension polymerization,and then anion starch microspheres were gained by neutral starch microspheres anioned by Na3P3O9 and its adsorption behavior were characterized by scan electron microscope,FT-IR spectroscopy. While the adsorption behavior of anion starch microspheres for Cd2+ was studied,and the influential factors were also discussed such as pH,time. The resu... |
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| Keywords: | anion starch microspheres adsorption Cd2+ kinetics |
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