Degradation of polyvinyl chloride microplastics via an electro-Fenton-like system with a TiO2/graphite cathode

Miao, Fei; Liu, Yanfeng; Gao, Mingming; Yu, Xin; Xiao, Pengwei; Wang, Mei; Wang, Shuguang; Wang, Xinhua

doi:10.1016/j.jhazmat.2020.123023

Cited by 276 publications

(103 citation statements)

References 60 publications

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“…As reported in the literature [104][105][106], several advanced methods and technologies for removing micropollutants have been evaluated on a large scale in several countries such as Germany, Sweden, and Switzerland. Here we represent and discuss some of the advanced methods, including magnetic-based techniques such as magnetic seed filtration and magnetic micro-submarines [107], photocatalytic micro-motors [108], membrane bioreactors coupled with activated carbon filters, rapid sand filtration, or CAS [109] and degradation-based techniques such as electrocatalysis [110], photocatalysis [111,112], biodegradation [113], and thermal degradation [114,115].…”

Section: Advanced Methods Of Microplastic Separationmentioning

confidence: 99%

“…Chlorine residue in oil products obtained from polyvinyl chloride waste limits the application of chemical recovery methods. Simultaneous dichlorination and degradation of the polymeric chain are required to develop a sustainable and rapid process for polyvinyl chloride waste chemical recovery [110]. Kang et al [120] synthesized magnetic spring-like carbon nanotubes (Mn@NCNT) and evaluated polyethylene-based microplastics degradation performance of robust hybrid carbon based-catalysts via oxidation and hydrothermal hydrolysis with 50% removal efficiency.…”

Section: Degradation Based Separationmentioning

confidence: 99%

“…Highly stable catalytic performance of Mn@NCNT hybrid catalyst was attributed to the synergetic effects of robust structure, Mn encapsulation, and nitrogen doping, which reduce required activation energy. Miao et al [110] applied a heterogeneous electro-Fenton like approach for degradation of polyvinyl chloride (PVC) in water using TiO 2 /graphite cathode through simultaneous reductive dechlorination and radical oxidation of PVC with 56 wt% removal and dechlorination efficiency of 75% at −0.7 V, 100 °C for 6 h. During the electrocatalytic process, polyvinyl chloride microplastics obtained electrons from the cathode which resulted in the removal of chlorine followed by oxidation of polymeric chain and production of organic intermediates such as carbocyclic acids, alcohols, and esters, which finally converted to CO 2 and H 2 O [110]. Ariza-Tarazona et al [121] studied the visible light catalytic degradation of HDPE microplastics from water using protein-derived C,N-TiO 2 semiconductor catalyst.…”

Section: Degradation Based Separationmentioning

confidence: 99%

“…The pure carbon structure of some extensively useful polymers, including polypropylene, polyethylene, and polyethylene terephthalate, restrict biodegradation using conventional techniques [123]. Compared with photocatalysis [111], electrocatalysis [110], and thermal degradation [114] methods, biodegradation of microplastics has particular strengths such as low operational cost, no need of chemicals, and being applicable for various polymeric particles [48,124]. Periphytic biofilm was used by Shabbir et al [48] for biodegradation of different microplastics, including polypropylene, polyethylene, and polyethylene terephthalate in the presence of glucose as an additional carbon source.…”

Section: Degradation Based Separationmentioning

confidence: 99%

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Microplastics in Aquatic Environments: Recent Advances in Separation Techniques

Hadian-Ghazvini

Torkashvand

2022

Period. Polytech. Chem. Eng.

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Separation and removal of microplastic pollution from aquatic environments as a global environmental issue is classified as one of the major concerns in both water and wastewater treatment plants. Microplastics as polymeric particles less than 5 mm in at least one dimension are found with different shapes, chemical compositions, and sizes in soil, water, and sediments. Conventional treatment methods for organic separation have shown high removal efficiency for microplastics, while the separation of small microplastic particles, mainly less than 100 µm, in wastewater treatment plants is particularly challenging. This review aims to review the principle and application of different physical and chemical methods for the separation and removal of microplastic particles from aquatic environments, especially in water treatments process, with emphasis on some alternative and emerging separation methods. Advantages and disadvantages of conventional separation techniques such as clarification, sedimentation, floatation, activated sludge, sieving, filtration, and density separation are discussed. The advanced separation methods can be integrated with conventional techniques or utilize as a separate step for separating small microplastic particles. These advanced microplastic separation methods include membrane bioreactor, magnetic separation, micromachines, and degradation-based methods such as electrocatalysis, photocatalysis, biodegradation, and thermal degradation.

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Section: Advanced Methods Of Microplastic Separationmentioning

confidence: 99%

Section: Degradation Based Separationmentioning

confidence: 99%

Section: Degradation Based Separationmentioning

confidence: 99%

Section: Degradation Based Separationmentioning

confidence: 99%

See 2 more Smart Citations

Microplastics in Aquatic Environments: Recent Advances in Separation Techniques

Hadian-Ghazvini

Torkashvand

2022

Period. Polytech. Chem. Eng.

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Section: Advanced Oxidation Processesmentioning

confidence: 99%

How to Build a Microplastics‐Free Environment: Strategies for Microplastics Degradation and Plastics Recycling

et al. 2022

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Microplastics are an emergent yet critical issue for the environment because of high degradation resistance and bioaccumulation. Unfortunately, the current technologies to remove, recycle, or degrade microplastics are insufficient for complete elimination. In addition, the fragmentation and degradation of mismanaged plastic wastes in environment have recently been identified as a significant source of microplastics. Thus, the developments of effective microplastics removal methods, as well as, plastics recycling strategies are crucial to build a microplastics‐free environment. Herein, this review comprehensively summarizes the current technologies for eliminating microplastics from the environment and highlights two key aspects to achieve this goal: 1) Catalytic degradation of microplastics into environmentally friendly organics (carbon dioxide and water); 2) catalytic recycling and upcycling plastic wastes into monomers, fuels, and valorized chemicals. The mechanisms, catalysts, feasibility, and challenges of these methods are also discussed. Novel catalytic methods such as, photocatalysis, advanced oxidation process, and biotechnology are promising and eco‐friendly candidates to transform microplastics and plastic wastes into environmentally benign and valuable products. In the future, more effort is encouraged to develop eco‐friendly methods for the catalytic conversion of plastics into valuable products with high efficiency, high product selectivity, and low cost under mild conditions.

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Microplastics Removal and Degradation in Urban Water Systems

Xu¹,

Ni²

2022

Microplastics in Urban Water Management

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Degradation of polyvinyl chloride microplastics via an electro-Fenton-like system with a TiO2/graphite cathode

Cited by 276 publications

References 60 publications

Microplastics in Aquatic Environments: Recent Advances in Separation Techniques

Microplastics in Aquatic Environments: Recent Advances in Separation Techniques

How to Build a Microplastics‐Free Environment: Strategies for Microplastics Degradation and Plastics Recycling

Microplastics Removal and Degradation in Urban Water Systems

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