• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Applied Polymer Science >Synthesis and characterization of salep sulfate and its utilization in preparation of heavy metal ion adsorbent
【24h】

Synthesis and characterization of salep sulfate and its utilization in preparation of heavy metal ion adsorbent

机译：硫酸sale磷酸酯的合成，表征及其在重金属离子吸附剂制备中的应用

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

A multicomponent polysaccharide obtained from dried tubers of certain natural terrestrial orchids was chemically modified by sulfonation using chlorosulfonic acid-dimethylformamide (HClSO_(3-)DMF) complex as a reagent. For a structural characterization of salep sulfate ~1H nuclear magnetic resonance (NMR), Fourier transform infrared (FTIR) spectra, and Thermogravimetric analysis (TGA) curves were recorded. The sulfate content of modified salep was determined using elemental analysis. This modified biopolymer was used to prepare a new environment-friendly heavy metal ion adsorbent, salep sulfate-graft-polyacrylic acid hydrogel (SS-g-PAA). Swelling rate and equilibrium water absorbency in various pH and saline solutions were investigated to study the effect of salep sulfate on swelling behavior of the hydrogel. In addition, the effect of sulfate content on heavy metal ion adsorption from aqueous solution was investigated. The results show that SS-g-PAA can effectively remove heavy metal ions (Co~(2+), Zn ~(2+), Cu~(2+)) from aqueous solution and swelling behavior of the hydrogels highly dependent on the amount of sulfate group on corresponding modified polysaccharide.
机译：从某些天然陆地兰花的干燥块茎中获得的多组分多糖是通过使用氯磺酸-二甲基甲酰胺（HClSO_（3-）DMF）络合物作为试剂通过磺化进行化学修饰的。为了对硫酸盐的〜1H核磁共振（NMR）进行结构表征，记录了傅立叶变换红外（FTIR）光谱和热重分析（TGA）曲线。使用元素分析确定改性的番木瓜的硫酸盐含量。这种改性的生物聚合物用于制备一种新型的环保型重金属离子吸附剂，硫酸盐-硫酸盐-接枝-聚丙烯酸水凝胶（SS-g-PAA）。研究了在各种pH和盐溶液中的溶胀速率和平衡吸水率，以研究硫酸盐salp对水凝胶溶胀行为的影响。此外，研究了硫酸盐含量对水溶液中重金属离子吸附的影响。结果表明，SS-g-PAA可以有效去除水溶液中的重金属离子（Co〜（2 +），Zn〜（2 +），Cu〜（2+）），并且水凝胶的溶胀行为高度依赖于相应的改性多糖上的硫酸根基团的量。

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