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Efficient removal of acid orange 7 using a porous adsorbent-supported zero-valent iron as a synergistic catalyst in advanced oxidation process.
Chemosphere. 2020 Apr; 244:125522.C

Abstract

This study focuses on the synthesis of granular red mud reinforced by zero-valent iron (Fe@GRM) and its application for the removal acid orange 7 (AO7) from aqueous solution. Then ZVI is employed as a catalyst for the activation of persulfate (PS) to produce sulfate radicals (SO4•-) that are produced at 900 °C in an anoxic atmosphere using the direct reduction of iron oxide in the red mud with maize straw as the reductant. Furthermore, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) are used to illustrate the morphology and porous structure of the Fe@GRM. The X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) revealed that Fe@GRM was loaded with zero-valent iron. This characterization confirmed that the Fe@GRM was a porous structure material that contained zero-valent iron. The influence of conditions for AO7 elimination, including initial pH, Fe@GRM dosage, initial AO7 concentrations, and temperature, is also investigated. The removal efficiency of AO7 was 90.78% using Fe@GRM/PS, while only 18.15% was removed when Fe@GRM was used alone. The degradation kinetics were well fitted to a pseudo-first-order kinetic model, and the rate of removal increased with temperature, demonstrating an endothermic elimination process. The Arrhenius activation energy of the process was 20.77 kJ/mol, which indicated that the reduction of AO7 was a diffusion-mediated reaction. Fe@GRM is a low-cost material that demonstrated outstanding performance with great potential for wastewater treatment.

Authors+Show Affiliations

The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China. Electronic address: duyfsdut@126.com.School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing, 526061, China. Electronic address: 1183492590@qq.com.School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing, 526061, China. Electronic address: 347582121@qq.com.The Key Lab of Marine Environmental Science and Ecology, Ministry of Education, College of Environmental Science and Engineering, Ocean University of China, Qingdao 266100, China; School of Environmental and Chemical Engineering, Zhaoqing University, Zhaoqing, 526061, China. Electronic address: cspeng@ouc.edu.cn.Department of Environmental Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China. Electronic address: engrimran56@gmail.com.Department of Biology, Deanship of Educational Services, Qassim University, Buraidah, 51452, Saudi Arabia. Electronic address: iffatkhattak@yahoo.com.Department of Environmental Science and Engineering, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China. Electronic address: jyli@szu.edu.cn.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

31830643

Citation

Du, Yufeng, et al. "Efficient Removal of Acid Orange 7 Using a Porous Adsorbent-supported Zero-valent Iron as a Synergistic Catalyst in Advanced Oxidation Process." Chemosphere, vol. 244, 2020, p. 125522.
Du Y, Dai M, Cao J, et al. Efficient removal of acid orange 7 using a porous adsorbent-supported zero-valent iron as a synergistic catalyst in advanced oxidation process. Chemosphere. 2020;244:125522.
Du, Y., Dai, M., Cao, J., Peng, C., Ali, I., Naz, I., & Li, J. (2020). Efficient removal of acid orange 7 using a porous adsorbent-supported zero-valent iron as a synergistic catalyst in advanced oxidation process. Chemosphere, 244, 125522. https://doi.org/10.1016/j.chemosphere.2019.125522
Du Y, et al. Efficient Removal of Acid Orange 7 Using a Porous Adsorbent-supported Zero-valent Iron as a Synergistic Catalyst in Advanced Oxidation Process. Chemosphere. 2020;244:125522. PubMed PMID: 31830643.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Efficient removal of acid orange 7 using a porous adsorbent-supported zero-valent iron as a synergistic catalyst in advanced oxidation process. AU - Du,Yufeng, AU - Dai,Min, AU - Cao,Jingfei, AU - Peng,Changsheng, AU - Ali,Imran, AU - Naz,Iffat, AU - Li,Juying, Y1 - 2019/12/03/ PY - 2019/09/18/received PY - 2019/11/26/revised PY - 2019/11/29/accepted PY - 2019/12/13/pubmed PY - 2020/3/24/medline PY - 2019/12/13/entrez KW - AO7 KW - Mechanism KW - Persulfate oxidation KW - Red mud KW - Zero-valent iron SP - 125522 EP - 125522 JF - Chemosphere JO - Chemosphere VL - 244 N2 - This study focuses on the synthesis of granular red mud reinforced by zero-valent iron (Fe@GRM) and its application for the removal acid orange 7 (AO7) from aqueous solution. Then ZVI is employed as a catalyst for the activation of persulfate (PS) to produce sulfate radicals (SO4•-) that are produced at 900 °C in an anoxic atmosphere using the direct reduction of iron oxide in the red mud with maize straw as the reductant. Furthermore, scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS) are used to illustrate the morphology and porous structure of the Fe@GRM. The X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS) revealed that Fe@GRM was loaded with zero-valent iron. This characterization confirmed that the Fe@GRM was a porous structure material that contained zero-valent iron. The influence of conditions for AO7 elimination, including initial pH, Fe@GRM dosage, initial AO7 concentrations, and temperature, is also investigated. The removal efficiency of AO7 was 90.78% using Fe@GRM/PS, while only 18.15% was removed when Fe@GRM was used alone. The degradation kinetics were well fitted to a pseudo-first-order kinetic model, and the rate of removal increased with temperature, demonstrating an endothermic elimination process. The Arrhenius activation energy of the process was 20.77 kJ/mol, which indicated that the reduction of AO7 was a diffusion-mediated reaction. Fe@GRM is a low-cost material that demonstrated outstanding performance with great potential for wastewater treatment. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/31830643/Efficient_removal_of_acid_orange_7_using_a_porous_adsorbent_supported_zero_valent_iron_as_a_synergistic_catalyst_in_advanced_oxidation_process_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(19)32762-6 DB - PRIME DP - Unbound Medicine ER -