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Organic Arsenic Removal by Using Covalently Bonded Iron–Aluminum Loaded Activated Carbon: Synergistic Mechanisms of Enhanced Adsorption and in Situ Hydrogen Peroxide Oxidation
https://orcid.org/0009-0002-7185-5615
In this study, iron–aluminum covalently bonded modified activated carbon (CAFM@PAC) was prepared by a constant-temperature infiltration method, which demonstrated highly efficient removal capability against p-aminobenzoic acid (p-ASA). The complete degradation of 30 μM p-ASA was achieved within 6 h at a dosage of 2.0 g/L CAFM@PAC, which was attributed to the enhanced adsorption mechanism involving electrostatic, hydrogen bonding, and π–π EDA interactions, as well as synergistic interactions between the Fe/Al/C fractions for the in situ production of H2O2 under acidic conditions, which triggered a Fenton-like reaction for the generation of ROS. The Fe/Al covalent structure promotes rapid electron transfer and accelerated Fe2+/Fe3+ cycling, resulting in a highly efficient H2O2 generation system. DFT calculations and product analysis confirmed that the C3 and C6 sites of p-ASA were the key sites for ROS attack. CAFM@PAC exhibited strong environmental adaptability and high recyclability, and maintains excellent removal efficiencies even in a multi-ionic system, with very low leakage of metal ions. CAFM@PAC showed excellent removal efficiency even in a polyconic system and very low metal ion leakage, demonstrating its potential as a sustainable water treatment material.
Effective removal of organic arsenic pollutants and enhancement of water purification efficiency by combining adsorption and oxidation through aluminum−iron modified activated carbon.
Organic Arsenic Removal by Using Covalently Bonded Iron–Aluminum Loaded Activated Carbon: Synergistic Mechanisms of Enhanced Adsorption and in Situ Hydrogen Peroxide Oxidation
https://orcid.org/0009-0002-7185-5615
In this study, iron–aluminum covalently bonded modified activated carbon (CAFM@PAC) was prepared by a constant-temperature infiltration method, which demonstrated highly efficient removal capability against p-aminobenzoic acid (p-ASA). The complete degradation of 30 μM p-ASA was achieved within 6 h at a dosage of 2.0 g/L CAFM@PAC, which was attributed to the enhanced adsorption mechanism involving electrostatic, hydrogen bonding, and π–π EDA interactions, as well as synergistic interactions between the Fe/Al/C fractions for the in situ production of H2O2 under acidic conditions, which triggered a Fenton-like reaction for the generation of ROS. The Fe/Al covalent structure promotes rapid electron transfer and accelerated Fe2+/Fe3+ cycling, resulting in a highly efficient H2O2 generation system. DFT calculations and product analysis confirmed that the C3 and C6 sites of p-ASA were the key sites for ROS attack. CAFM@PAC exhibited strong environmental adaptability and high recyclability, and maintains excellent removal efficiencies even in a multi-ionic system, with very low leakage of metal ions. CAFM@PAC showed excellent removal efficiency even in a polyconic system and very low metal ion leakage, demonstrating its potential as a sustainable water treatment material.
Effective removal of organic arsenic pollutants and enhancement of water purification efficiency by combining adsorption and oxidation through aluminum−iron modified activated carbon.
Organic Arsenic Removal by Using Covalently Bonded Iron–Aluminum Loaded Activated Carbon: Synergistic Mechanisms of Enhanced Adsorption and in Situ Hydrogen Peroxide Oxidation
https://orcid.org/0009-0002-7185-5615
In this study, iron–aluminum covalently bonded modified activated carbon (CAFM@PAC) was prepared by a constant-temperature infiltration method, which demonstrated highly efficient removal capability against p-aminobenzoic acid (p-ASA). The complete degradation of 30 μM p-ASA was achieved within 6 h at a dosage of 2.0 g/L CAFM@PAC, which was attributed to the enhanced adsorption mechanism involving electrostatic, hydrogen bonding, and π–π EDA interactions, as well as synergistic interactions between the Fe/Al/C fractions for the in situ production of H2O2 under acidic conditions, which triggered a Fenton-like reaction for the generation of ROS. The Fe/Al covalent structure promotes rapid electron transfer and accelerated Fe2+/Fe3+ cycling, resulting in a highly efficient H2O2 generation system. DFT calculations and product analysis confirmed that the C3 and C6 sites of p-ASA were the key sites for ROS attack. CAFM@PAC exhibited strong environmental adaptability and high recyclability, and maintains excellent removal efficiencies even in a multi-ionic system, with very low leakage of metal ions. CAFM@PAC showed excellent removal efficiency even in a polyconic system and very low metal ion leakage, demonstrating its potential as a sustainable water treatment material.
Effective removal of organic arsenic pollutants and enhancement of water purification efficiency by combining adsorption and oxidation through aluminum−iron modified activated carbon.
Organic Arsenic Removal by Using Covalently Bonded Iron–Aluminum Loaded Activated Carbon: Synergistic Mechanisms of Enhanced Adsorption and in Situ Hydrogen Peroxide Oxidation
Kong, Yanli (author) / Lu, Fan (author) / Huang, Aihua (author) / Chen, Zhonglin (author) / Ma, Jiangya (author)
ACS ES&T Water ; 4 ; 2981-2994
2024-07-12
Article (Journal)
Electronic Resource
English
In Situ Iron Oxidation Using Hydrogen Peroxide
| British Library Conference Proceedings | 2010
In Situ Iron Oxidation Using Hydrogen Peroxide
| British Library Conference Proceedings | 2010