Existence of chloride ions in high salinity wastewater accelerates the removal of micropollutants over light-driven catalysts

Cheng Xin Chen; Shan Shan Yang; Jie Ding; Lan Ding; Rui Wu; Lu Ming Liu; Ji Wei Pang; Lei He; Jun Qiu Jiang; Nan Qi Ren

doi:10.1016/j.apcatb.2023.122823

Existence of chloride ions in high salinity wastewater accelerates the removal of micropollutants over light-driven catalysts

Cheng Xin Chen
, Shan Shan Yang^*
, Jie Ding
, Lan Ding
, Rui Wu
, Lu Ming Liu
, Ji Wei Pang
, Lei He
, Jun Qiu Jiang
, Nan Qi Ren

^*Corresponding author for this work

School of Environment, Harbin Institute of Technology
College of Chemistry
Harbin Institute of Technology
China Energy Conservation and Environmental Protection Group

Research output: Contribution to journal › Article › peer-review

29 Scopus citations

Abstract

Photocatalytic removal of micropollutants from highly saline water purification is challenging because of the interference and quenching of active species by chloride ions (Cl^–). Herein, anthraquinone-2-carboxylic acid (AQC) was anchored on aminated graphene sheets (AGR) to construct a metal-free photocatalyst (AQC/AGR) via a mild two-step method. We demonstrated efficient degradation of micropollutants on AQC/AGR, in which trimethoprim (TMP)-removal efficiency reached 97.7 % under solar irradiation for 40 min at high NaCl concentration (500 mM). A novel mechanism for the electron-transfer interaction of AQC/AGR with Cl^– and in situ generation of radicals from photoactivated Cl^– was explored through characterization measurements, radical quenching experiments and theoretical calculations. This system removed micropollutants mainly through radical processes mediated by superoxide radical (O₂^•–), hydroxyl radical (^•OH) and dichloride radical anion (Cl₂^•−). This work presents a novel family of catalysts for solar-energy-enabled removal of organic micropollutants to purify saline wastewater with high chloride concentration.

Original language	English
Article number	122823
Journal	Applied Catalysis B: Environmental
Volume	334
DOIs	https://doi.org/10.1016/j.apcatb.2023.122823
State	Published - 5 Oct 2023
Externally published	Yes

Keywords

Anthraquinone
Chloride ions
Electron transfer
Photoactivation
Radical

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10.1016/j.apcatb.2023.122823

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title = "Existence of chloride ions in high salinity wastewater accelerates the removal of micropollutants over light-driven catalysts",

abstract = "Photocatalytic removal of micropollutants from highly saline water purification is challenging because of the interference and quenching of active species by chloride ions (Cl–). Herein, anthraquinone-2-carboxylic acid (AQC) was anchored on aminated graphene sheets (AGR) to construct a metal-free photocatalyst (AQC/AGR) via a mild two-step method. We demonstrated efficient degradation of micropollutants on AQC/AGR, in which trimethoprim (TMP)-removal efficiency reached 97.7 \% under solar irradiation for 40 min at high NaCl concentration (500 mM). A novel mechanism for the electron-transfer interaction of AQC/AGR with Cl– and in situ generation of radicals from photoactivated Cl– was explored through characterization measurements, radical quenching experiments and theoretical calculations. This system removed micropollutants mainly through radical processes mediated by superoxide radical (O2•–), hydroxyl radical (•OH) and dichloride radical anion (Cl2•−). This work presents a novel family of catalysts for solar-energy-enabled removal of organic micropollutants to purify saline wastewater with high chloride concentration.",

keywords = "Anthraquinone, Chloride ions, Electron transfer, Photoactivation, Radical",

author = "Chen, \{Cheng Xin\} and Yang, \{Shan Shan\} and Jie Ding and Lan Ding and Rui Wu and Liu, \{Lu Ming\} and Pang, \{Ji Wei\} and Lei He and Jiang, \{Jun Qiu\} and Ren, \{Nan Qi\}",

note = "Publisher Copyright: {\textcopyright} 2023 Elsevier B.V.",

year = "2023",

month = oct,

day = "5",

doi = "10.1016/j.apcatb.2023.122823",

language = "英语",

volume = "334",

journal = "Applied Catalysis B: Environmental",

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TY - JOUR

T1 - Existence of chloride ions in high salinity wastewater accelerates the removal of micropollutants over light-driven catalysts

AU - Chen, Cheng Xin

AU - Yang, Shan Shan

AU - Ding, Jie

AU - Ding, Lan

AU - Wu, Rui

AU - Liu, Lu Ming

AU - Pang, Ji Wei

AU - He, Lei

AU - Jiang, Jun Qiu

AU - Ren, Nan Qi

PY - 2023/10/5

Y1 - 2023/10/5

N2 - Photocatalytic removal of micropollutants from highly saline water purification is challenging because of the interference and quenching of active species by chloride ions (Cl–). Herein, anthraquinone-2-carboxylic acid (AQC) was anchored on aminated graphene sheets (AGR) to construct a metal-free photocatalyst (AQC/AGR) via a mild two-step method. We demonstrated efficient degradation of micropollutants on AQC/AGR, in which trimethoprim (TMP)-removal efficiency reached 97.7 % under solar irradiation for 40 min at high NaCl concentration (500 mM). A novel mechanism for the electron-transfer interaction of AQC/AGR with Cl– and in situ generation of radicals from photoactivated Cl– was explored through characterization measurements, radical quenching experiments and theoretical calculations. This system removed micropollutants mainly through radical processes mediated by superoxide radical (O2•–), hydroxyl radical (•OH) and dichloride radical anion (Cl2•−). This work presents a novel family of catalysts for solar-energy-enabled removal of organic micropollutants to purify saline wastewater with high chloride concentration.

AB - Photocatalytic removal of micropollutants from highly saline water purification is challenging because of the interference and quenching of active species by chloride ions (Cl–). Herein, anthraquinone-2-carboxylic acid (AQC) was anchored on aminated graphene sheets (AGR) to construct a metal-free photocatalyst (AQC/AGR) via a mild two-step method. We demonstrated efficient degradation of micropollutants on AQC/AGR, in which trimethoprim (TMP)-removal efficiency reached 97.7 % under solar irradiation for 40 min at high NaCl concentration (500 mM). A novel mechanism for the electron-transfer interaction of AQC/AGR with Cl– and in situ generation of radicals from photoactivated Cl– was explored through characterization measurements, radical quenching experiments and theoretical calculations. This system removed micropollutants mainly through radical processes mediated by superoxide radical (O2•–), hydroxyl radical (•OH) and dichloride radical anion (Cl2•−). This work presents a novel family of catalysts for solar-energy-enabled removal of organic micropollutants to purify saline wastewater with high chloride concentration.

KW - Anthraquinone

KW - Chloride ions

KW - Electron transfer

KW - Photoactivation

KW - Radical

UR - https://www.scopus.com/pages/publications/85154050290

U2 - 10.1016/j.apcatb.2023.122823

DO - 10.1016/j.apcatb.2023.122823

M3 - 文章

AN - SCOPUS:85154050290

SN - 0926-3373

VL - 334

JO - Applied Catalysis B: Environmental

JF - Applied Catalysis B: Environmental

M1 - 122823

ER -

Existence of chloride ions in high salinity wastewater accelerates the removal of micropollutants over light-driven catalysts

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Keywords

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