Remediation of polycyclic aromatic hydrocarbons by sulfate radical advanced oxidation: Evaluation of efficiency and ecological impact

Xu, Yuanzhou; Che, Ting; Li, Yajuan; Fang, Cheng; Dai, Ziwen; Li, Huixin; Xu, Li; Hu, Feng

doi:10.1016/j.ecoenv.2021.112594

Cited by 20 publications

(4 citation statements)

References 57 publications

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“…The other three dosages also exhibited a positive effect compared with the unpretreated SCB. Based on the best pretreatment condition (0.1 g persulfate/g SCB), ferrous sulfate was further added into the pretreatment system to test its synergistic effect on hydrolysis via the sulfate radical advanced oxidation processes (SR-AOPs) ( Xu et al, 2021 ). As shown in Figure 3B , no significant increase in hydrolysis was observed for the applied dosage of ferrous sulfate.…”

Section: Resultsmentioning

confidence: 99%

Valorization of sugarcane bagasse for sugar extraction and residue as an adsorbent for pollutant removal

Wang

Tian

Guan

et al. 2022

Front. Bioeng. Biotechnol.

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Following juice crushing for sugar or bioethanol production from sugarcane, bagasse (SCB) is generated as the main lignocellulosic by-product. This study utilized SCB generated by a hydraulic press as feedstock to evaluate sugar extraction as well as adsorption potential. Total soluble sugar (sucrose, glucose, and fructose) of 0.4 g/g SCB was recovered with H2O extraction in this case. Insoluble sugar, that is, cellulose in SCB, was further hydrolyzed into glucose (2%–31%) with cellulase enzyme, generating a new bagasse residue (SCBE). Persulfate pretreatment of SCB slightly enhanced saccharification. Both SCB and SCBE showed great potential as adsorbents with 98% of methylene blue (MB) removed by SCB or SCBE and 75% of Cu2+ by SCBE and 80% by SCB in 60 min. The maximum adsorption amount (qm) was 85.8 mg/g (MB by SCB), 77.5 mg/g (MB by SCBE), 3.4 mg/g (Cu2+ by SCB), and 1.2 mg/g (Cu2+ by SCBE). The thermodynamics indicated that the adsorption process is spontaneous, endothermic, and more random in nature. The experimental results offer an alternative to better reutilize SCB.

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Section: Resultsmentioning

confidence: 99%

Valorization of sugarcane bagasse for sugar extraction and residue as an adsorbent for pollutant removal

Wang

Tian

Guan

et al. 2022

Front. Bioeng. Biotechnol.

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“…The catalytic degradation of MOFs, MOFs composites, and MOF-derived metal oxides are mainly controlled by ·SO 4 − , while MOF-derived metal/carbon hybrids and carbon materials are controlled by nonradical-controlled pathways. 17,18 The advantages of a free-radical mechanism are high oxidation capacity and high mineralization rate but poor selectivity and few regenerable active sites. The advantages of a nonradical mechanism are high selectivity, high oxidation efficiency, and low system interference, but low mineralization rate and slow degradation rate.…”

Section: Degradation Mechanism Of Organic Pollutants In Sr-aopsmentioning

confidence: 99%

Research progress of metal–organic framework-based material activation of persulfate to degrade organic pollutants in water

Wen

Shen

2023

RSC Adv.

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“…The careful selection of oxidants in such studies is guided not only by their effectiveness but also by the imperative to preserve the integrity of the soil environment. Noteworthy observations, such as the influence of Fenton reagent on total organic carbon (TOC) content in the soil and its impact on indigenous soil microbe growth, contribute key insights into enhancing PAH remediation strategies and evaluating their ecological implications [19]. As concerns surrounding the environmental impact of rapid petroleum hydrocarbon degradation through chemical oxidation continue to grow, the quest for environmentally friendly activation methods gains prominence [20].…”

Section: Introductionmentioning

confidence: 99%

Efficiency of Hydrogen Peroxide and Fenton Reagent for Polycyclic Aromatic Hydrocarbon Degradation in Contaminated Soil: Insights from Experimental and Predictive Modeling

Smara,

Khalladi,

Moulai-Mostefa

et al. 2024

Processes

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This study investigates the degradation kinetics of polycyclic aromatic hydrocarbons (PAHs) using hydrogen peroxide (H2O2) and the Fenton process (H2O2/Fe2+). The effect of oxidant concentration and the Fenton molar ratio on PAH decomposition efficiency is examined. Results reveal that increasing H2O2 concentration above 25 mmol/samples leads to a slight increase in the rate constants for both first- and second-order reactions. The Fenton process demonstrates higher efficiency in PAH degradation compared to H2O2 alone, achieving decomposition yields ranging from 84.7% to 99.9%. pH evolution during the oxidation process influences PAH degradation, with alkaline conditions favoring lower elimination rates. Fourier-transform infrared (FTIR) spectroscopy analysis indicates significant elimination of PAHs after treatment, with both oxidants showing comparable efficacy in complete hydrocarbon degradation. The mechanisms of PAH degradation by H2O2 and the Fenton process involve hydroxyl radical formation, with the latter exhibiting greater efficiency due to Fe2+ catalysis. Gaussian process regression (GPR) modeling accurately predicts reduced concentration, with optimized ARD-Exponential kernel function demonstrating superior performance. The Improved Grey Wolf Optimizer algorithm facilitates optimization of reaction conditions, yielding a high degree of agreement between experimental and predicted values. A MATLAB 2022b interface is developed for efficient optimization and prediction of C/C0, a critical parameter in PAH degradation studies. This integrated approach offers insights into optimizing the efficiency of oxidant-based PAH remediation techniques, with potential applications in contaminated soil remediation.

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Remediation of polycyclic aromatic hydrocarbons by sulfate radical advanced oxidation: Evaluation of efficiency and ecological impact

Cited by 20 publications

References 57 publications

Valorization of sugarcane bagasse for sugar extraction and residue as an adsorbent for pollutant removal

Valorization of sugarcane bagasse for sugar extraction and residue as an adsorbent for pollutant removal

Research progress of metal–organic framework-based material activation of persulfate to degrade organic pollutants in water

Efficiency of Hydrogen Peroxide and Fenton Reagent for Polycyclic Aromatic Hydrocarbon Degradation in Contaminated Soil: Insights from Experimental and Predictive Modeling

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