文献类型： 外文期刊

作者： Dong, Aiqin ¹ ; Xie, Jie ² ; Wang, Wenmin ¹ ; Yu, Liping ¹ ; Liu, Qian ¹ ; Yin, Yeping ³ ;

作者机构： 1.Jiangxi Agr Univ, Coll Sci, Dept Chem, Nanchang 330045, Peoples R China

2.Jiangxi Acad Agr Sci, Inst Soil & Fertilizer & Environm & Resources Stu, Nanchang 330200, Peoples R China

3.Huazhong Agr Univ, Coll Sci, Dept Chem, Wuhan 430070, Peoples R China

关键词： adsorption;preparation;heavy metal ions;starch

期刊名称：JOURNAL OF HAZARDOUS MATERIALS （ 影响因子：10.588； 五年影响因子：10.129 ）

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收录情况： SCI

摘要： A novel method was proposed to prepare amino starch by reacting ethylenediamine with previously synthesized dialdehyde starch. Different factors affecting the preparation, i.e., ethylenediamine concentration, ethylenediamine:dialdehyde starch molar ratio, pH. duration and temperature have been studied. The modified starch was characterized by IR spectroscopy, elemental analysis, X-ray diffraction and differential scanning calorimetry. The amino starch derivatives were evaluated as adsorbents. The adsorption activity for heavy metals such as Cu(II) and Cr(VI) by crosslinked amino starch was studied in terms of adsorption amount, kinetics and isotherm; and adsorbent reuse were also studied. Adsorption processes for Cu(II) and Cr(VI) on crosslinked amino starch fit a Langmuir isotherm, and adsorption for Cu(II) and Cr(VI) from aqueous solution was endothermic reactions. Crosslinked amino starch was very effective for the adsorption of Cu(II) and Cr(VI), and efficient in capacity, recycled.