Modulating Anion Nanotraps via Halogenation for High-Efficiency ~(99)TcO_4~-/ReO_4~-Removal under Wide-Ranging pH Conditions

Xinyi Yang; Weijin Wu; Yinghui Xie

首页> 外文期刊>Environmental Science & Technology: ES&T >Modulating Anion Nanotraps via Halogenation for High-Efficiency ~(99)TcO_4~-/ReO_4~-Removal under Wide-Ranging pH Conditions

【24h】

Modulating Anion Nanotraps via Halogenation for High-Efficiency ~(99)TcO_4~-/ReO_4~-Removal under Wide-Ranging pH Conditions

机译：Modulating Anion Nanotraps via Halogenation for High-Efficiency ~(99)TcO_4~-/ReO_4~-Removal under Wide-Ranging pH Conditions

获取原文

获取原文并翻译 | 示例

掌桥外文数据库（机构版） >>

开具论文收录证明 >>

文献代查 >>

页面导航

摘要
著录项
相关主题

摘要

Efficient and sustainable methods for ~(99)TcO4~-removal from acidic nuclear waste streams,contaminated water,and highly alkaline tank wastes are highly sought after.Herein,we demonstrate that ionic covalent organic polymers(iCOPs)possessing imidazolium-N~+ nanotraps allow the selective adsorption of ~(99)TcO4~-under wide-ranging pH conditions.In particular,we show that the binding affinity of the cationic nanotraps toward ~(99)TcO4~-can be modulated by tuning the local environment around the nanotraps through a halogenation strategy,thereby enabling universal pH ~(99)TcO4~-removal.A parent iCOP-1 possessing imidazolium-N~+ nanotraps showed fast kinetics(reaching adsorption equilibrium in 1 min),a high adsorption capacity(up to 1434.1 ± 24.6 mg/g),and exceptional selectivity for ~(99)TcO4_ and ReO_4~-(nonradioactive analogue of ~(99)TcO4~)removal in contaminated water.By introducing F groups near the imidazolium-N~+ nanotrap sites(iCOP-2),a ReO_4~-removal efficiency over 58% was achieved in 60 min in 3 M HNO3 solution.Further,introduction of larger Br groups near the imidazolium-N~+ binding sites(iCOP-3)imparted a pronounced steric effect,resulting in exceptional adsorption performance for ~(99)TcO4~-under super alkaline conditions and from low-activity waste streams at US legacy Hanford nuclear sites.The halogenation strategy reported herein guides the task-specific design of functional adsorbents for ~(99)TcO4~-removal and other applications.

著录项

来源
《Environmental Science & Technology: ES&T》 |2023年第29期|10870-10881|共12页
作者
Xinyi Yang; Weijin Wu; Yinghui Xie;
展开▼
作者单位

College of Environmental Science and Engineering North China Electric Power University,Beijing 102206,P.R.China;

College of Environmental Science and Engineering North China Electric Power University,Beijing 102206,P.R China;

展开▼
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
正文语种英语
中图分类环境科学、安全科学;
关键词
pertechnetate; perrhenate; nuclear waste; dynamic capture; environmental remediation;

Modulating Anion Nanotraps via Halogenation for High-Efficiency ~(99)TcO_4~-/ReO_4~-Removal under Wide-Ranging pH Conditions

摘要

著录项

相关主题

期刊订阅