• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Removal of cationic and anionic dyes from aqueous solution with magnetite/pectin and magnetite/silica/pectin hybrid nanocomposites: kinetic, isotherm and mechanism analysis
【24h】

Removal of cationic and anionic dyes from aqueous solution with magnetite/pectin and magnetite/silica/pectin hybrid nanocomposites: kinetic, isotherm and mechanism analysis

机译：用磁铁矿/果胶和磁铁矿/二氧化硅/果胶/果胶杂交纳米复合材料去除阳离子和阴离子染料中的阳离子和阴离子染料：动力学，等温线和机制分析

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 adsorbents, magnetite nanoparticles modified with pectin shell and silica/pectin double shell, were fabricated and tested for single dye and dye mixture adsorption from water samples. Cationic dyes methylene blue (MB) and crystal violet (CV) and anionic dyes methyl orange (MO) and Eriochrome black T (EBT) were employed to assess dye removal efficiency. The influence of pH, amount of adsorbent, initial dye concentration and contact time was investigated. Results indicated that the optimum pH for removing cationic dyes was 8.0 and 2.0 for anionic dyes. The kinetic studies showed rapid sorption dynamics following a second-order kinetic model. Dye adsorption equilibrium data were fitted well to the Sips isotherm for cationic and anionic dyes. The maximum monolayer capacity, (q(max)) for MB, CV, EBT and MO was calculated from Sips as 197.18, 180.29, 65.35 and 26.75 mg g(-1) respectively for magnetite/silica/pectin NPs and 168.72, 140.49, 72.35 and 27.22 mg g(-1) respectively for magnetite/pectin nanoparticles. For dye mixture adsorption, a new HPLC assay was proposed for quantitation of dyes in treated samples. The results came in accordance with that of single dye adsorption where the magnetite/pectin NPs showed preferred adsorption to anionic dyes while the magnetite/silica/pectin NPs had more affinity to cationic dyes. Thus, our proposed NPs can be used as cheap and efficient adsorbents for removal of cationic and anionic dyes from aqueous solutions.
机译：新吸附剂，用果胶壳和二氧化硅改性的磁性纳米颗粒/双果胶壳，被制造和用于单一染料测试并从水样染料混合物吸附。阳离子染料亚甲蓝（MB）和结晶紫（CV）和阴离子染料甲基橙（MO），并用于评估染料的去除效率铬黑T（EBT）。 pH值，吸附剂的量，初始染料浓度和接触时间的影响进行了研究。结果表明最适pH除去阳离子染料为8.0和2.0阴离子染料。动力学研究表明下一个二阶动力学模型快速吸附动力学。染料吸附平衡数据拟合很好地啜饮等温线阳离子和阴离子染料。对于MB的最大单层容量，（Q（最大值）），CV，EBT和MO从啜饮计算为197.18，180.29，65.35和26.75毫克克（-1）分别为磁铁矿/二氧化硅/果胶的NP和168.72，140.49， 72.35 27.22和毫克克（-1）分别为磁铁矿/果胶的纳米颗粒。染料混合物的吸附，一个新的HPLC测定，提出了用于处理的样品中的染料的定量。结果出来按照该单一染料吸附其中磁铁矿/果胶的NP显示优选吸附到阴离子染料而磁铁矿/二氧化硅/果胶的NP有更多的亲和力阳离子染料。因此，我们所提出的纳米粒子可被用作用于从水溶液中去除阳离子和阴离子染料的廉价和有效的吸附剂。

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