...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Biological Macromolecules: Structure, Function and Interactions >Fabrication and characterization of composite cryobeads based on chitosan and starches-g-PAN as efficient and reusable biosorbents for removal of Cu2+, Ni2+, and Co2+ ions
【24h】

Fabrication and characterization of composite cryobeads based on chitosan and starches-g-PAN as efficient and reusable biosorbents for removal of Cu2+, Ni2+, and Co2+ ions

机译：基于壳聚糖和淀粉-G-PAN的复合冷冻剂的制造与表征，以除去Cu2 +，Ni2 +和CO2 +离子的高效且可重复使用的生物吸水性

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Novel composite biosorbents were developed in this work as cryobeads by dual cross-linking of a mixture of chitosan (CS) and starch coming from different botanical sources, such as potato, wheat, and rice, grafted with poly (acrylonitrile) (PAN). Glutaraldehyde and poly(ethylene glycol diglycidyl ether) were used as cross-linkers. Composite cryobeads were characterized by FTIR. SEM-EDX, and swelling kinetics. Sorption of Cu2+, Ni2+, and Co2+ onto the novel biosorbents was investigated as a function of time and the concentration of the metal ion, at the optimum pH and sorbent dose. Pseudo-second-order kinetic model and Elovich model well fitted the kinetic results, indicating chemisorption as the most probable mechanism of sorption, while the Langmuir, and Sips isotherm models described the sorption at equilibrium for all metal ions. The values of the maximum sorption capacity of Cu2+, Ni2+, and Co2+ onto the composite sorbent based on CS and rice starch-g-PAN were as follows: 100.6 mg/g, 83.25 mg/g, and 74.01 mg/g, respectively. The nitrile groups present in the biocomposites CS/starch-g-PAN constitute a source to further increase the sorption capacity by their hydrolysis. A remarkable level of reusability was found for the composite cryobeads, no decrease of the sorption capacity being observed after five consecutive sorption/desorption cycles. (C) 2018 Elsevier B.V. All rights reserved.
机译：新型复合生物吸附剂是在这项工作中，通过脱乙酰壳多糖（CS）的混合物中的双交联cryobeads开发并从不同的植物来源，如马铃薯，小麦，和稻，与聚（丙烯腈）接枝的（PAN）淀粉到来。戊二醛和聚（乙二醇二缩水甘油基醚）用作交联剂。通过红外复合cryobeads进行了表征。 SEM-EDX，和溶胀动力学。 Cu2 +和Ni2 +的，和CO 2 +的吸附到所述新颖生物吸附剂进行了研究，作为时间的函数，并且所述金属离子的浓度，在最适pH和吸附剂剂量。伪二级动力学模型和Elovich模型很好地拟合动力学结果，表明化学吸附作为吸附的最可能的机制，而朗缪尔，和SIP等温线模型描述的吸附达到平衡对所有的金属离子。 Cu2 +和Ni2 +的，和CO 2 +的最大吸附能力的到基于CS和大米淀粉接枝PAN复合吸附剂的值如下：分别100.6毫克/克，83.25毫克/克，和74.01毫克/克。腈基团存在于该生物复合CS /淀粉接枝PAN构成，以进一步增加源可以通过水解吸附容量。可重用性的显着水平被发现的复合cryobeads，五个连续的吸附/解吸循环后观察到没有吸附容量的降低。 （c）2018年elestvier b.v.保留所有权利。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号