...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Environmental Science & Technology >Insights into Adsorption of Humic Substances on Graphitic Carbon Nitride
【24h】

Insights into Adsorption of Humic Substances on Graphitic Carbon Nitride

机译：石墨氮化物上腐殖质吸附的洞察

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

Graphitic carbon nitride (CN) has been widely used in environmental pollution remediation. However, the adsorption of organic compounds on CNs, which has practical significance for the environmental application of CNs, is poorly understood. For the first time, this study systematically investigated the adsorption behaviors and mechanisms of humic substances (HSs), i.e., humic acid (HA) and fulvic acid (FA), on CNs derived from four typical precursors. Intriguingly, CN derived from urea (CN-U) showed a great capacity for HS adsorption due to its porous structure and large surface area, with maximum adsorption amounts of 73.24 and 51.62 mgC/g for HA and FA, respectively. The formation, influencing factors, and relative contributions of multiple interactions to HS adsorption on CNs were thoroughly elucidated. HS adsorption on CNs was mainly mediated by electrostatic interactions, π-π interactions, and H-bonding. The dominance of electrostatic interactions resulted in HS adsorption being highly dependent on pH and ionic strength. HS components with high aromaticity and high molecular weight were preferentially adsorbed due to π-π interactions. These multiple interactions were largely affected by amino groups and tri-s-triazine units of CNs, as well as the moieties of aromatic rings and oxygen-containing groups of HSs.
机译：石墨碳氮化物（CN）已广泛用于环境污染修复。然而，对CNS对CNS环境应用具有实际意义的有机化合物的吸附是较差的。这项研究首次系统地研究了腐殖质（HSS），即腐殖酸（HA）和富乙酸（FA）的吸附行为和机制，衍生自四种典型前体的CNS。源自尿素（CN-U）的CN衍生自尿素（CN-U）的CN由于其多孔结构和大表面积而具有HS吸附的巨大能力，并且分别具有73.24和51.62mgC / g的最大吸附量。对CNS对HS吸附的多种相互作用的形成，影响因素和相对贡献得到了彻底阐明。 HS对CNS的吸附主要是通过静电相互作用，π-π相互作用和H键合的介导的。静电相互作用的优势导致HS吸附高度依赖于pH和离子强度。优先由于π-π相互作用优先吸附具有高芳香度和高分子量的HS组分。这些多种相互作用在很大程度上受CNS的氨基和三嗪单位的影响，以及芳环和含氧基团的HSS。

著录项

  • 来源
    《Environmental Science & Technology》 |2021年第12期|7910-7919|共10页
  • 作者

    Jianchao Wang; Dongbei Yue; Dongyu Cui; Lingyue Zhang; Xinwei Dong;

  • 作者单位

    School of Environment Tsinghua University Beijing 100084 China;

    School of Environment Tsinghua University Beijing 100084 China;

    School of Environment Tsinghua University Beijing 100084 China State Key Laboratory of Environmental Criteria and Risk Assessment and State Environmental Protection Key laboratory of Simulation and Control of Groundwater Pollution Chinese Research Academy of Environmental Sciences Beijing 100012 China;

    School of Environment Tsinghua University Beijing 100084 China;

    School of Environment Tsinghua University Beijing 100084 China;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);美国《化学文摘》(CA);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    graphitic carbon nitride; adsorption; humic substances; multiple interactions;

    机译：石墨氮化物;吸附;腐殖质;多个互动;

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