Catalytic hydrodehalogenation of halogenated disinfection byproducts for clean drinking water production: A review

Ilunga, Ali K.; Mamba, Bhekie B.; Nkambule, Thabo T.I.

doi:10.1016/j.jwpe.2021.102402

Cited by 9 publications

(7 citation statements)

References 125 publications

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“…7−10 For example, the US Environmental Protection Agency, the Chinese Ministry of Ecology and Environment, and the European Union have all formulated corresponding laws and regulations to control the source. 11,12 In addition to policy and legal source control, the research and development of detoxification technology for existing halogenated organic pollutants (especially chlorine-containing organics) in water bodies have also attracted extensive attention. The current treatment technologies for chlorinecontaining organics include adsorption and enrichment, microbial degradation, 13,14 advanced oxidation, 4,15 and chemical reduction.…”

Section: Introductionmentioning

confidence: 99%

“…They pose a significant threat to the ecological environment and to animal and plant health. Therefore, many countries and organizations have listed halogenated organics as priority pollutants. − For example, the US Environmental Protection Agency, the Chinese Ministry of Ecology and Environment, and the European Union have all formulated corresponding laws and regulations to control the source. , …”

Section: Introductionmentioning

confidence: 99%

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Rational Design and Structural Regulation of Robust Catalysts for Electrocatalytic Hydrodechlorination: From Nanostructures to Single Atoms

Zhang

et al. 2023

ACS Catal.

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As a class of persistent pollutants that are easily bioaccumulatable and highly biotoxic, chlorinated organic pollutants exist in the environment and pose a substantial threat to ecological safety. The electrocatalytic hydrodechlorination (EHDC) technology shows the advantages of high efficiency, simple operation, mild reaction conditions, and no secondary pollution and thus promises a good application prospect in the treatment of chlorinecontaining pollutants. Pd-based catalysts are considered the most efficient catalysts for electroreductive dechlorination thus far, yet the reserves of Pd are scarce, and the price is often prohibitively high. The development of noble metal catalysts with high atom utilization and non-noble metal catalysts for EHDC has become a hot research topic, but relevant reviews are still lacking. In this paper, the research progress on EHDC catalysts during recent years is reviewed and the influence of catalyst microstructure regulation on the EHDC performance is discussed in detail. The regulation strategies including the regulation mechanisms of electronic effect, support effect, size effect, and coordination effect for enhancing the EHDC performance of catalysts at different scales (from nanostructures to single atoms) are summarized and proposed, which could provide guidance for the development of efficient EHDC catalysts from the atomic scale. At the end of this review, the application prospects and challenges for EHDC catalysts are also discussed.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rational Design and Structural Regulation of Robust Catalysts for Electrocatalytic Hydrodechlorination: From Nanostructures to Single Atoms

Zhang

et al. 2023

ACS Catal.

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“…Advanced oxidation processes (AOPs) such as Fenton catalysis, photocatalysis, sonolysis, and electrocatalysis have been regarded as effective technologies to degrade biorecalcitrant HOCs . These radical-based processes show nonselective degradation features but generally suffer from low electron efficiency because of the rapid recombination of free radicals, and the interference of the anions (e.g., Cl – and CO 3 2– ) and natural organic matter. , More importantly, the uncontrollable state of such oxidative pathways can provoke the formation of halogenated disinfection byproducts . Thus, a green and cost-effective technology for HOC removal is greatly required.…”

Section: Introductionmentioning

confidence: 99%

“…8,9 More importantly, the uncontrollable state of such oxidative pathways can provoke the formation of halogenated disinfection byproducts. 10 Thus, a green and costeffective technology for HOC removal is greatly required.…”

Section: Introductionmentioning

confidence: 99%

Catalytic Oxygen Activation over the Defective CuO Nanoparticles for Ultrafast Dehalogenation

Huang

Han

Xiang

et al. 2022

ACS Appl. Mater. Interfaces

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The nucleophilic superoxide radical (O2 •–)-based dehalogenation reaction shows great potential to degrade the toxic halogenated organic compounds (HOCs). But such an O2 •–-mediated reductive reaction often suffers from the competition of the secondary oxidative species (e.g., •OH), leading to inferior electron efficiency and possible disinfection byproduct formation. Here, an O2 •–-dominant ultrafast dehalogenation system is developed via molecular O2 activation by the oxygen vacancy (OV)-rich CuO nanoparticles (nCuO). The nCuO delivers a remarkable dechlorination rate constant of 3.92 × 10–2 L min–1 m–2 for 2,4-dichlorophenol, much higher than that of the conventional zerovalent (bi)metals. The absorbed O2 on the nCuO surface is exclusively responsible for O2 •– generation, and its reactivity increases with the elevated OV content because of the enhanced orbital hybridization between the O p- and Cu d-orbitals. More importantly, the ubiquitous carbonate species firmly bound to the surface OVs block the formation of the secondary oxidative species via H2O2 activation, assuring the dominant role of the in situ generated O2 •– for the selective HOC dehalogenation. The carbonate-deactivated OVs of the nCuO can be feasibly recovered via air annealing for sustainable dehalogenation. This work provides a new opportunity for selective O2 •– generation via interfacial defect engineering for dehalogenation and other environmental applications.

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“…Reductive hydrodehalogenation has been regarded as a significant chemical transformation in organic synthesis, medicinal chemistry, and environmental protection. − For example, hydrodehalogenation serves as a useful tool for late-stage structural modification of bioactive molecules containing halo groups . In addition, hydrodehalogenation plays an important role in the degradation of toxic and persistent halogenated organic pollutants into environmentally benign chemicals …”

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confidence: 99%

Reductive Hydrodehalogenation of Halogenated Carboxylic Acid Derivatives Using a DMSO/HCOONa·2H₂O System

et al. 2023

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A practical and operationally simple hydrodehalogenation of halogenated carboxylic acid derivatives using a DMSO/ HCOONa•2H 2 O system is developed. This protocol avoids the involvement of light irradiation, electrochemical apparatus, transition metals, radical initiators, strong bases, and other additional additives. Control experiments suggest that HCOONa might function as a hydride donor in the reduction process via nucleophilic substitution or addition to achieve the hydrodehalogenation.

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Catalytic hydrodehalogenation of halogenated disinfection byproducts for clean drinking water production: A review

Cited by 9 publications

References 125 publications

Rational Design and Structural Regulation of Robust Catalysts for Electrocatalytic Hydrodechlorination: From Nanostructures to Single Atoms

Rational Design and Structural Regulation of Robust Catalysts for Electrocatalytic Hydrodechlorination: From Nanostructures to Single Atoms

Catalytic Oxygen Activation over the Defective CuO Nanoparticles for Ultrafast Dehalogenation

Reductive Hydrodehalogenation of Halogenated Carboxylic Acid Derivatives Using a DMSO/HCOONa·2H₂O System

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Catalytic hydrodehalogenation of halogenated disinfection byproducts for clean drinking water production: A review

Cited by 9 publications

References 125 publications

Rational Design and Structural Regulation of Robust Catalysts for Electrocatalytic Hydrodechlorination: From Nanostructures to Single Atoms

Rational Design and Structural Regulation of Robust Catalysts for Electrocatalytic Hydrodechlorination: From Nanostructures to Single Atoms

Catalytic Oxygen Activation over the Defective CuO Nanoparticles for Ultrafast Dehalogenation

Reductive Hydrodehalogenation of Halogenated Carboxylic Acid Derivatives Using a DMSO/HCOONa·2H2O System

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Reductive Hydrodehalogenation of Halogenated Carboxylic Acid Derivatives Using a DMSO/HCOONa·2H₂O System