Microwave-combined advanced oxidation for organic pollutants in the environmental remediation: An overview of influence, mechanism, and prospective

Feng, Yan; Tao, Yue; Meng, Qingqiang; Qu, Jianhua; Ma, Shouyi; Han, Siyue; Zhang, Ying

doi:10.1016/j.cej.2022.135924

Cited by 55 publications

(10 citation statements)

References 165 publications

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“…Persulfate-based advanced oxidation processes have been used for industrial wastewater treatment, , in which strong oxidizing radicals (SO 4 •– and HO • ) can be produced from persulfate (PDS) or permonosulfate (PMS) activation with the addition of energy via heat, − ultraviolet light, ultrasound, or microwaves or by electron transfer via a transition metal or a base . Heat activation of PDS (heat/PDS) (eq ) is an efficient approach for the degradation of organic pollutants , and shows great potential in high-temperature wastewater treatment, as it can directly use the excess heat.…”

Section: Introductionmentioning

confidence: 99%

Abatement of Aromatic Contaminants from Wastewater by a Heat/Persulfate Process Based on a Polymerization Mechanism

Liu

Cui

Yang

et al. 2023

Environ. Sci. Technol.

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A novel approach to the abatement of pollutants consisting of their conversion to separable solid polymers is explored by a heat/ persulfate (PDS) process for the treatment of high-temperature wastewaters. During this process, a simultaneous decontamination and carbon recovery can be achieved with minimal use of PDS, which is significantly different from conventional degradation processes. The feasibility of this process is demonstrated by eight kinds of typical organic pollutants and by a real coking wastewater. For the treatment of the selected pollutants, 30.2−91.9% DOC abatement was achieved with 24.8−91.2% carbon recovery; meanwhile, only 5.2−47.0% of PDS was consumed compared to a conventional degradation process. For the treatment of a real coking wastewater, 71.0% DOC abatement was achieved with 66.0% carbon recovery. With phenol as a representative compound, our polymerization-based heat/PDS process is applicable in a wide pH range (3.5−9.0) with a carbon recovery of >87%. Both SO 4•− and HO • can be initiators for polymerization, with different contribution ratios under various conditions. Phenol monomers are semioxidized to form phenolic radicals, which are polymerized via chain transfer or chain growth processes to form separable solid phenol polymers, benzenediol polymers, and cross-linked polymers.

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Section: Introductionmentioning

confidence: 99%

Abatement of Aromatic Contaminants from Wastewater by a Heat/Persulfate Process Based on a Polymerization Mechanism

Liu

Cui

Yang

et al. 2023

Environ. Sci. Technol.

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“…Ionic liquids and deep eutectic solvents are included within green solvents [48]. Wang et al (2017) [49] Comparative to conventional approaches, microwave pretreatment techniques are a promising approach to increase the efficiency and speed of XOs production, providing a faster reaction rate and lower energy consumption [51]. Recently, the use of microwaves has been considered a promising heating method for the selective and controlled hydrothermal depolymerization of biomass.…”

Section: Lignocellulosic Biomass Pretreatmentmentioning

confidence: 99%

The Potential of Xylooligosaccharides as Prebiotics and Their Sustainable Production from Agro-Industrial by-Products

Valladares-Diestra,

de Souza Vandenberghe,

Vieira

et al. 2023

Foods

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In recent years, concerns about a good-quality diet have increased. Food supplements such as prebiotics have great nutritional and health benefits. Within the diverse range of prebiotics, xylooligosaccharides (XOs) show high potential, presenting exceptional properties for the prevention of systemic disorders. XOs can be found in different natural sources; however, their production is limited. Lignocellulosic biomasses present a high potential as a source of raw material for the production of XOs, making the agro-industrial by-products the perfect candidates for production on an industrial scale. However, these biomasses require the application of physicochemical pretreatments to obtain XOs. Different pretreatment methodologies are discussed in terms of increasing the production of XOs and limiting the coproduction of toxic compounds. The advance in new technologies for XOs production could decrease their real cost (USD 25–50/kg) on an industrial scale and would increase the volume of market transactions in the prebiotic sector (USD 4.5 billion). In this sense, new patents and innovations are being strategically developed to expand the use of XOs as daily prebiotics.

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“…There are many methods for the treatment and resource utilization of OBDCs, including composting, microwave heating, solvent extraction, and copyrolysis. ,− However, due to the low processing efficiency, complex process, high cost, low crude oil recovery rate, and the possibility of secondary pollution, it has not been developed commercially. Pyrolysis treatment of OBDCs has the advantages of good treatment effect, significant harmlessness, high resource utilization, less air pollution, and stable operation and has been widely used in southern Sichuan, China. , However, there are few studies on the kinetic parameters and reaction mechanism of OBDCs.…”

Section: Introductionmentioning

confidence: 99%

Study on Pyrolysis of Shale Gas Oil-Based Drilling Cuttings: Kinetics, Process Parameters, and Product Yield

Liu

Xiao

Dai³

et al. 2023

ACS Omega

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The main reaction range (350–550 °C) of oil-based drilling cutting (OBDC) pyrolysis was studied by a thermogravimetric analyzer and a vacuum tube furnace. The average activation energies calculated by four model-free methods were 185.5 kJ/mol (FM), 184.16 kJ/mol (FWO), 166.17 kJ/mol (KAS), and 176.03 kJ/mol (Starink). The reaction mechanism was predicted by the Criado (Z-master plot) method. It is found that a high heating rate is helpful to predict the reaction mechanism, but it cannot be described by a single reaction model. Under the conditions of target temperature higher than 350 °C, residence time higher than 50 min, laying thickness less than 20 mm, and heating rate lower than 15 °C, the residual oil content is lower than 0.3% and the recovery rate of mineral oil is higher than 98.43%. Solid phase products accounted for more than 70%, reached the maximum 17.04% at 450 °C, and then decreased to 15.87% at 500 °C. Aromatic hydrocarbons, as coking precursors, are transformed from a low ring to a high ring. Recycled mineral oil can reconfigure oil-based mud (OBM). The research results can provide a theoretical basis for process optimization.

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Microwave-combined advanced oxidation for organic pollutants in the environmental remediation: An overview of influence, mechanism, and prospective

Cited by 55 publications

References 165 publications

Abatement of Aromatic Contaminants from Wastewater by a Heat/Persulfate Process Based on a Polymerization Mechanism

Abatement of Aromatic Contaminants from Wastewater by a Heat/Persulfate Process Based on a Polymerization Mechanism

The Potential of Xylooligosaccharides as Prebiotics and Their Sustainable Production from Agro-Industrial by-Products

Study on Pyrolysis of Shale Gas Oil-Based Drilling Cuttings: Kinetics, Process Parameters, and Product Yield

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