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Degradation of petroleum hydrocarbons in soil via advanced oxidation process using peroxymonosulfate activated by nanoscale zero-valent iron.
Chemosphere. 2021 May; 270:128627.C

Abstract

Recently, the use of nanoscale zero-valent iron (nZVI) for removal of organic contaminants from aqueous and soil system has increased. In this study, we employ nZVI to activate peroxymonosulfate (PMS) for the degradation of total petroleum hydrocarbons (TPHs) in aged diesel-contaminated soil. Upon PMS activation by nZVI, PMS produces more highly reactive oxygen species (ROS) in both aqueous solution and soil compared to other compounds (PMS/Co(II)), as determined by electron paramagnetic resonance spectroscopy. Thus, nZVI is an effective catalyst for PMS activation, leading to the efficient degradation of diesel oil in soil compared to other catalysts and oxidants. The optimal concentrations of PMS and nZVI were found to be 3 and 0.2%, respectively, showing the best degradation efficiency (61.2% in 2 h). The observed TPH degradation was retarded (up to 19.1-37% efficiency) in the presence of radical scavengers, such as tert-butyl alcohol, nitrobenzene, ethyl alcohol, and isopropyl alcohol. These results also demonstrate that ROS (hydroxyl and sulfate free radicals) are generated via PMS activation by nZVI. Moreover, more than 96% of TPH can be degraded by sequential applications of PMS/nZVI. Factors affecting TPH degradation, namely PMS/nZVI concentration, soil:solution ratio, soil pH, activators, and oxidants, are also analyzed. The results demonstrate that TPH is degraded to below the residential soil quality limit using PMS/nZVI based on the advanced oxidation process (AOP), which is therefore an effective option for chemical remediation of diesel-contaminated soils over a wide range of pH.

Authors+Show Affiliations

Department of Environmental Engineering, Kunsan National University, Gunsan, 54150, South Korea.Department of Environmental Engineering, Kunsan National University, Gunsan, 54150, South Korea. Electronic address: swjeong@kunsan.ac.kr.

Pub Type(s)

Journal Article

Language

eng

PubMed ID

33109362

Citation

Bajagain, Rishikesh, and Seung-Woo Jeong. "Degradation of Petroleum Hydrocarbons in Soil Via Advanced Oxidation Process Using Peroxymonosulfate Activated By Nanoscale Zero-valent Iron." Chemosphere, vol. 270, 2021, p. 128627.
Bajagain R, Jeong SW. Degradation of petroleum hydrocarbons in soil via advanced oxidation process using peroxymonosulfate activated by nanoscale zero-valent iron. Chemosphere. 2021;270:128627.
Bajagain, R., & Jeong, S. W. (2021). Degradation of petroleum hydrocarbons in soil via advanced oxidation process using peroxymonosulfate activated by nanoscale zero-valent iron. Chemosphere, 270, 128627. https://doi.org/10.1016/j.chemosphere.2020.128627
Bajagain R, Jeong SW. Degradation of Petroleum Hydrocarbons in Soil Via Advanced Oxidation Process Using Peroxymonosulfate Activated By Nanoscale Zero-valent Iron. Chemosphere. 2021;270:128627. PubMed PMID: 33109362.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Degradation of petroleum hydrocarbons in soil via advanced oxidation process using peroxymonosulfate activated by nanoscale zero-valent iron. AU - Bajagain,Rishikesh, AU - Jeong,Seung-Woo, Y1 - 2020/10/20/ PY - 2020/07/08/received PY - 2020/09/29/revised PY - 2020/10/10/accepted PY - 2020/10/29/pubmed PY - 2021/3/11/medline PY - 2020/10/28/entrez KW - Advanced oxidation process KW - Diesel KW - Peroxymonosulfate (PMS) KW - Reactive oxygen species (ROS) KW - Soil KW - nZVI SP - 128627 EP - 128627 JF - Chemosphere JO - Chemosphere VL - 270 N2 - Recently, the use of nanoscale zero-valent iron (nZVI) for removal of organic contaminants from aqueous and soil system has increased. In this study, we employ nZVI to activate peroxymonosulfate (PMS) for the degradation of total petroleum hydrocarbons (TPHs) in aged diesel-contaminated soil. Upon PMS activation by nZVI, PMS produces more highly reactive oxygen species (ROS) in both aqueous solution and soil compared to other compounds (PMS/Co(II)), as determined by electron paramagnetic resonance spectroscopy. Thus, nZVI is an effective catalyst for PMS activation, leading to the efficient degradation of diesel oil in soil compared to other catalysts and oxidants. The optimal concentrations of PMS and nZVI were found to be 3 and 0.2%, respectively, showing the best degradation efficiency (61.2% in 2 h). The observed TPH degradation was retarded (up to 19.1-37% efficiency) in the presence of radical scavengers, such as tert-butyl alcohol, nitrobenzene, ethyl alcohol, and isopropyl alcohol. These results also demonstrate that ROS (hydroxyl and sulfate free radicals) are generated via PMS activation by nZVI. Moreover, more than 96% of TPH can be degraded by sequential applications of PMS/nZVI. Factors affecting TPH degradation, namely PMS/nZVI concentration, soil:solution ratio, soil pH, activators, and oxidants, are also analyzed. The results demonstrate that TPH is degraded to below the residential soil quality limit using PMS/nZVI based on the advanced oxidation process (AOP), which is therefore an effective option for chemical remediation of diesel-contaminated soils over a wide range of pH. SN - 1879-1298 UR - https://www.unboundmedicine.com/medline/citation/33109362/Degradation_of_petroleum_hydrocarbons_in_soil_via_advanced_oxidation_process_using_peroxymonosulfate_activated_by_nanoscale_zero_valent_iron_ L2 - https://linkinghub.elsevier.com/retrieve/pii/S0045-6535(20)32822-8 DB - PRIME DP - Unbound Medicine ER -
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