Insights into the mechanism of non-radical activation of persulfate via activated carbon for the degradation of p-chloroaniline

Yao, Chenhui; Zhang, Yongqing; Du, Meimei; Du, Xiaoming; Huang, Shaobin

doi:10.1016/j.cej.2019.01.040

Cited by 146 publications

(33 citation statements)

References 46 publications

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“…Investigations on the degradation of PCP by SO 4 $and OH $ radicals have shown that approximately 75% of PCP degradation and mineralization were achieved within 60 min under optimal conditions (Govindan et al, 2014). By contrast, almost complete degradation and mineralization of 2,4-dichlorophenol and tetrabromobisphenol A were achieved with PAO (Kuśmierek et al, 2016;Li et al, 2015;Zhou et al, 2018;Huang and Zhang, 2019).…”

Section: Principles Of Paomentioning

confidence: 92%

“…Generally, persulfate can be activated by energy input in the form of photons (e.g., UV photolysis) and heat (e.g., thermolysis) (Fig. 2), or by direct electron transfer (e.g., metal-based and activated carbon/biocharbased electron shuttles) (Zhu et al, 2018c;Chen et al, 2019;Yao et al, 2019). Then, the newly-born SO 4 $radical can trigger the propagation of more SO 4 $radical through a series of chain reactions, and OH $ will be generated upon the reaction between SO 4 $and H 2 O/OH -(Eq.…”

Section: Principles Of Paomentioning

confidence: 99%

“…Highly toxic and carcinogenic pchloroaniline is a critical intermediate in the synthesis of pesticides, medicines and dyes. Investigations on the PAO degradation of p-chloroaniline showed its complete degradation and mineralization in waste streams containing p-chloroaniline (Yuan et al, 2015;Yao et al, 2019). 8) Chlorophenols.…”

Section: Principles Of Paomentioning

confidence: 99%

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Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

Wang

2021

Front. Environ. Sci. Eng.

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Due to the toxicity of bioaccumulative organohalides to human beings and ecosystems, a variety of biotic and abiotic remediation methods have been developed to remove organohalides from contaminated environments. Bioremediation employing organohalide-respiring bacteria (OHRB)-mediated microbial reductive dehalogenation (Bio-RD) represents a cost-effective and environmentally friendly approach to attenuate highly-halogenated organohalides, specifically organohalides in soil, sediment and other anoxic environments. Nonetheless, many factors severely restrict the implications of OHRB-based bioremediation, including incomplete dehalogenation, low abundance of OHRB and consequent low dechlorination activity. Recently, the development of in situ chemical oxidation (ISCO) based on sulfate radicals (SO 4 ·− ) via the persulfate activation and oxidation (PAO) process has attracted tremendous research interest for the remediation of lowly-halogenated organohalides due to its following advantages, e.g., complete attenuation, high reactivity and no selectivity to organohalides. Therefore, integration of OHRB-mediated Bio-RD and subsequent PAO (Bio-RD-PAO) may provide a promising solution to the remediation of organohalides. In this review, we first provide an overview of current progress in Bio-RD and PAO and compare their limitations and advantages. We then critically discuss the integration of Bio-RD and PAO (Bio-RD-PAO) for complete attenuation of organohalides and its prospects for future remediation applications. Overall, Bio-RD-PAO opens up opportunities for complete attenuation and consequent effective in situ remediation of persistent organohalide pollution.

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Section: Principles Of Paomentioning

confidence: 92%

Section: Principles Of Paomentioning

confidence: 99%

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Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

Wang

2021

Front. Environ. Sci. Eng.

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“…Because of its well-developed micropores, high surface area, and sorption capacity, powdered activated carbon is commonly exploited to adsorb different kinds of pollutants. On titanium dioxide/activated carbon composites, activated carbon behaves like a hub for pollutants to attach before being delivered to the breakdown site (Yao et al 2019).…”

Section: Heterogeneous Photocatalysismentioning

confidence: 99%

Solar photo-oxidation of recalcitrant industrial wastewater: a review

et al. 2022

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Conventional methods to clean wastewater actually lead to incomplete treatments, calling for advanced technologies to degrade recalcitrant pollutants. Herein we review solar photo-oxidation to degrade the recalcitrant contaminants in industrial wastewater, with focus on photocatalysts, reactor design and the photo-Fenton process. We discuss limitations due to low visible-light absorption, catalyst collection and reusability, and production of toxic by-products. Photodegradation of refractory organics by solar light is controlled by pH, photocatalyst composition and bandgap, pollutant properties and concentration, irradiation type and intensity, catalyst loading, and the water matrix.

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“…The ultimate goal of degrading pollutants through AOPs is to eliminate the harm of pollutants to aquatic organisms and humans. However, in the process of pollutant degradation, the transformation of macromolecular substances into small molecular substances will cause change in the properties of the substances (Long et al 2014;Yao et al 2019). Therefore, it is important to evaluate the change of toxicity during the degradation of MNC solutions.…”

Section: Toxicity Evaluationmentioning

confidence: 99%

Efficient and economical degradation of minocycline by natural bornite-activated hydrogen peroxide and persulfate: kinetics and mechanisms

Yuan

Wang

Zhao

et al. 2021

Preprint

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Natural bornite (NBo), a sulfide mineral of copper and iron, is one of the main mineral raw materials for copper extraction. In this study, NBo-activated hydrogen peroxide (H2O2) and persulfate processes (PS) for the degradation of minocycline (MNC) in aqueous solution were systemically investigated and compared. The MNC removal rates with the NBo/PS and NBo/H2O2 processes were 86.40% and 87.50%, respectively. The mineralization rate of NBo/PS (33.96%) was higher than that of NBo/H2O2 (29.94%) after reaction for 180 min. The effects of oxidant and activator dosage, pH, common inorganic anions (i.e., Cl−, NO3−, and HCO3−), and water composition on MNC degradation were systematically evaluated. In addition, the degradation of MNC in natural water matrix and toxicity evaluation were also studied to better evaluate the feasibility of practical application of those two processes. The results of free radical quenching experiments and electron paramagnetic resonance spectroscopy (EPR) showed that HO· was the main activated species in the NBo/H2O2 system, while SO4·− and HO· were the main activated species in the NBo/PS system. The degradation of MNC in the NBo/PS system was achieved through electron transfer, while the degradation of MNC in the NBo/H2O2 system was mainly achieved through free radical addition. The degradation pathway mainly included deamidation reactions, C-C bond breakage and hydroxylation. Reusability of NBo showed that NBo was considerably stable in activating PS and H2O2 for degradation of MNC, which was cost-effective activator. This work provides a new perspective on the degradation mechanism of pollutants by Fe-Cu bimetallic sulfide activation of PS and H2O2.

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Insights into the mechanism of non-radical activation of persulfate via activated carbon for the degradation of p-chloroaniline

Cited by 146 publications

References 46 publications

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

Integration of microbial reductive dehalogenation with persulfate activation and oxidation (Bio-RD-PAO) for complete attenuation of organohalides

Solar photo-oxidation of recalcitrant industrial wastewater: a review

Efficient and economical degradation of minocycline by natural bornite-activated hydrogen peroxide and persulfate: kinetics and mechanisms

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