共 2 条
Electrochemically Switchable Sulfurized Polyacrylonitrile for Controllable Recovery of Copper in Wastewater Based on Reversible Adsorption/Desorption Regulation
被引:1
|作者:
Wang, Shengli
[1
]
Ding, Chi
[2
]
Zhang, Jinna
[1
]
Ren, Nanqi
[1
]
Liu, Yanbiao
[3
]
You, Shijie
[1
]
机构:
[1] Harbin Inst Technol, Sch Environm, State Key Lab Urban Water Resource & Environm, Harbin 150090, Peoples R China
[2] Beijing Engn Corp Ltd, Power China, Beijing 100024, Peoples R China
[3] Dalian Univ Technol, Sch Environm Sci & Technol, Key Lab Ind Ecol & Environm Engn, Minist Educ,Dalian POCT Lab, Dalian 116024, Peoples R China
基金:
中国国家自然科学基金;
关键词:
reversible adsorption/desorption;
sulfurized polyacrylonitrile;
heavy metals;
wastewater;
ION-EXCHANGE;
ADSORPTION;
D O I:
10.1021/acs.est.4c04287
中图分类号:
X [环境科学、安全科学];
学科分类号:
08 ;
0830 ;
摘要:
Within the context of circular economy and industrial ecology, adsorption offers an effective manner for recycling resources from wastewater, but controllable desorption remains a challenge. Inspired by metal-thiol binding and reversible thiol-disulfide redox transformation in biological systems, this study reports the development of a reversible adsorption/desorption (RAD) system for controllable recovery of copper based on electrochemically switchable sulfurized polyacrylonitrile (SPAN). Density functional theory calculations offered theoretical prediction for the formation of S-Cu bonds and reversible weak interaction between S-S bonds and Cu2+. The SPAN anchored onto titanium suboxide ceramic foam (SPAN@TiSO) could regulate Cu2+ adsorption/desorption stimulated by the electrode potential, indicated by the adsorption capacity of 243.3 mg g-1 (30 min) at 0.2 V vs SHE and a desorption efficiency of 98.4% (5 min) at 0.8 V vs SHE. Electrochemical analysis revealed that the reversible redox transformation of S-S/-S- groups in SPAN was responsible for selective adsorption and rapid desorption in response to the electrode potential. This study provides a proof-of-concept demonstration of an electrochemically switchable polymer to build up a reversible RAD system for controllable recovery of heavy metals in wastewater, making value-added resource recovery more efficient, more intelligent, and more sustainable.
引用
收藏
页码:20114 / 20124
页数:11
相关论文