...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of the Taiwan Institute of Chemical Engineers >Pullulan based porous semi-IPN hydrogel: Synthesis, characterization and its application in the removal of mercury from aqueous solution
【24h】

Pullulan based porous semi-IPN hydrogel: Synthesis, characterization and its application in the removal of mercury from aqueous solution

机译：支链淀粉基多孔半IPN水凝胶：合成，表征及其在水溶液中去除汞中的应用

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

A pullulan-graft-polyacrylamide semi-IPN hydrogel was prepared by free radical polymerization and became porous by the incorporation of calcium carbonate and a subsequent acid treatment. The product was characterized by Fourier transform infrared spectroscopy, thermal gravimetric analysis, and optical microscopy to confirm the formation of porous hydrogels. In addition, the effect of several variables such as monomer, crosslinlcer, initiator and porogen concentration on swelling ratio and porosity of hydrogels was explored. The maximum porosity and swelling capacity in the optimized conditions were found to be 96.5% and 3089%, respectively. The prepared hydrogel was utilized as a selective adsorbent of Hg(II) ions from an aqueous solution with fast and high removal efficiency. The mercury sorption capacity under non-buffered conditions is achieved 8.6 mmol/g in the first 90 min via colorimetric method. The mechanism of adsorption was well presented using a pseudo-second-order kinetic model. Furthermore, the isothermal adsorption equilibrium data were fitted to Freundlich model. Finally, the mercury-loaded hydrogel was regenerated without losing its original activity and stability. (C) 2015 Taiwan Institute of Chemical Engineers. Published by Elsevier B.V. All rights reserved.
机译：通过自由基聚合制备支链淀粉-接枝-聚丙烯酰胺半IPN水凝胶，并通过掺入碳酸钙和随后的酸处理使其成为多孔的。通过傅里叶变换红外光谱，热重分析和光学显微镜对产物进行表征，以确认多孔水凝胶的形成。此外，还探讨了单体，交联剂，引发剂和成孔剂浓度等变量对水凝胶溶胀率和孔隙率的影响。在优化条件下的最大孔隙率和溶胀能力分别为96.5％和3089％。所制备的水凝胶被用作快速，高效去除水溶液中Hg（II）离子的选择性吸附剂。通过比色法在前90分钟内在非缓冲条件下的汞吸附能力达到8.6 mmol / g。使用伪二级动力学模型很好地描述了吸附机理。此外，将等温吸附平衡数据拟合到Freundlich模型。最终，负载汞的水凝胶得以再生，而不会失去其原始活性和稳定性。 （C）2015台湾化学工程师学会。由Elsevier B.V.发布。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