• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>RSC Advances >Reduced graphene oxide–metal nanoparticle composite membranes for environmental separation and chloro-organic remediation
【24h】

Reduced graphene oxide–metal nanoparticle composite membranes for environmental separation and chloro-organic remediation

机译：石墨烯氧化物 - 金属纳米颗粒复合膜进行环境分离和氯有机修复

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

摘要

This study explores the integration of separation performance of rGO membrane with heterogeneous oxidation reactions for remediation of organic contaminants from water. Herein, an approach was introduced based on layer-by-layer assembly for functionalizing rGO membranes with polyacrylic acid and then by in situ synthesis of Fe based reactive nanoparticles. TEM characterization of the cross-section lamella of the membranes showed a high density of nanoparticles (12% Fe) in the functionalized domain, signifying the importance of polyacrylic acid for in situ synthesis of nanoparticles. The membranes exhibited a pure water permeability of 1.9 LMH bar ~(?1) . The membranes had low to moderate salt retention, and more than 90% neutral red retention (organic probe molecule, size: 1.2 nm). The membranes also exhibited high retention of humic acids (80%), preventing these organics from entering the reactive domain, and thus potentially reducing the formation of undesired by-products. A persulfate mediated oxidative pathway was employed to demonstrate the reactive removal of organic contaminants. The membranes achieved >95% conversion by convectively passing 2 mM persulfate feed at a transmembrane pressure of 0.4 bar. Successful degradation of TCE (up to 61%) was achieved in a single pass by convective flowing of the feed solution through the membrane, generating up to 80% of the theoretical maximum chloride as one of the byproducts. Elevated temperatures significantly enhanced persulfate mediated TCE oxidation extent from 24% at 23 °C to 54% at 40 °C under batch operating conditions.
机译：本研究探讨了RGO膜与异质氧化反应的分离性能的整合，用于修复水中有机污染物。在此，基于逐层组件引入一种方法，用于用聚丙烯酸官能化RGO膜，然后通过原位合成Fe合成的Fe基反应性纳米颗粒。膜的横截面薄片的TEM表征在官能化结构域中显示出高密度的纳米颗粒（12％Fe），从而表示聚丙烯酸对纳米颗粒的原位合成的重要性。膜表现出1.9 LMH条的纯净渗透性〜（？1）。膜具有较低至中度盐保留，且超过90％的中性红色保留（有机探针分子，尺寸：1.2nm）。膜还表现出高保留腐殖酸（80％），防止这些有机物进入反应结构域，因此可能降低了不需要的副产物的形成。使用过硫酸盐介导的氧化途径来证明有机污染物的反应性去除。通过在0.4巴的跨膜压力下对流过2mm过硫酸盐进料来实现> 95％转化率。通过通过膜的对流流动流动进料溶液，在单次通过中成功降解TCE（最多61％），产生高达80％的理论最大氯化物作为副产物之一。升高的温度显着增强过硫酸盐介导的TCE氧化程度在23℃下在批量操作条件下在40℃下在24％至54％。

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