• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Journal of Polymers and the Environment >Synthesis and Characterization of Magnetic Halloysite-Alginate Beads for the Removal of Lead (Ⅱ) Ions from Aqueous Solutions
【24h】

Synthesis and Characterization of Magnetic Halloysite-Alginate Beads for the Removal of Lead (Ⅱ) Ions from Aqueous Solutions

机译：磁性霍氏藻酸盐珠粒从水溶液中除去铅（Ⅱ）离子的合成及表征

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

In this study, alginate (ALG) hybrid spheres supported with magnetic halloysite nanotubes (MHNTs) were synthesized and used effectively in the removal of Pb(II) ions from aqueous solutions. MHNTs were prepared using the co-precipitation method. Afterward, magnetic halloysite-alginate (MHNT-ALG) hybrid beads were formed using ALG and MHNTs by the extrusion dripping method. The characterization of halloysite nanotubes (HNTs), ALG, MHNTs, and MHNT-ALG hydrogels was performed using FTIR, TGA, particle size analysis, SEM-EDX, TEM, VSM, and BET. According to VSM measurements, the saturation magnetization values of MHNTs and MHNT-ALG hybrid beads at a mass ratio of 1:2 were determined to be 22.7emu/g and 8.17emu/g, respectively. The BET surface area of MHNT-ALG hybrid beads was measured to be 81.3m(2)/g. The adsorption of Pb(II) ions on MHNT-ALG hydrogels was investigated as a function of the pH of the medium, amount of MHNT-ALG, the mass ratio of MHNT to ALG in the composite, and initial Pb(II) concentration in batch stirred vessels. The fit of the adsorption equilibrium of Pb(II) ions on MHNT-ALG hydrogels to the Langmuir type-I and type-II models, Freundlich model, and Redlich-Peterson model was investigated. The fit of the adsorption kinetics to the pseudo-second-order kinetics model was evaluated. Using the Weber and Morris model, the effect of internal and external diffusion limitations was discussed.
机译：在本研究中，合成卤素（ALG）支撑有磁性矿石纳米管（MHNT）的混合球，并有效地用于从水溶液中除去PB（II）离子。使用共析出方法制备MHNT。之后，使用挤出滴水法使用ALG和MHNT形成磁性矿石 - 藻酸盐（MHNT-ALG）杂交珠。使用FTIR，TGA，粒度分析，SEM-EDX，TEM，VSM和BET进行霍利石纳米管（HNT），ALG，MHNT和MHNT-ALG水凝胶的表征。根据VSM测量，测定质量比为1：2的MHNT和MHNT-ALG杂交珠的饱和磁化值分别为22.7EMU / g和8.17EMU / g。测量MHNT-ALG杂交珠的BET表面积为81.3m（2）/ g。研究了PB（II）离子对MHNT-ALG水凝胶的函数作为培养基的pH值，MHNT-ALG的量，复合材料中的MHNT与ALG的质量比，初始PB（II）浓度批量搅拌血管。研究了PB（II）离子对Langmuir Type-I和II型模型，Freundlich模型和Redlich-Peterson模型的拟合对MHNT-ALG水凝胶的吸附平衡。评估了吸附动力学对伪二阶动力学模型的拟合。使用Weber和Morris模型，讨论了内部和外部扩散限制的效果。

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