Intimate coupling of photocatalysis and biodegradation for wastewater treatment: Mechanisms, recent advances and environmental applications

Yu, Mingliang; Wang, Jiajia; Tang, Lin; Feng, Chengyang; Liu, Haoyu; Zhang, Hao; Peng, Bo; Chen, Zhaoming; Xie, Qingqing

doi:10.1016/j.watres.2020.115673

Cited by 178 publications

(65 citation statements)

References 105 publications

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“…Inspired by semiconductive mineral-induced photocatalysis, intimate coupling of photocatalysis and biodegradation (ICPB) in conjunction with appropriate mineral analogues provides an opportunity to overcome the limited efficiency of independent processes [151]. Such amendments provide a feasible strategy in environmental engineering applications targeted to degrade/transform bio-refractory organic pollutants.…”

Section: Environmental Engineering Remediationmentioning

confidence: 99%

Recent advances in the roles of minerals for enhanced microbial extracellular electron transfer

Dong

Chen

Yan

et al. 2020

Renewable and Sustainable Energy Reviews

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Minerals are ubiquitous in the natural environment and have close contact with microorganisms. In various scenarios, microorganisms that harbor extracellular electron transfer (EET) capabilities have evolved a series of beneficial strategies through the mutual exchange of electrons with extracellular minerals to enhance survival and metabolism. These electron exchange interactions are highly relevant to the cycling of elements in the epigeosphere and have a profound significance in bioelectrochemical engineering applications. In this review, we summarize recent advances related to the effects of different minerals that facilitate the EET process and discuss the underlying mechanisms and outlooks for future applications. The promotional effects of minerals arise from their redox-active ability, electrical conductivity and photocatalytic capability. In mineral-promoted EET processes, various responses have concurrently arisen in microorganisms, such as stretching of electrically conductive pili (e-pili), upregulated expression of outer-membrane cytochromes (Cyts) and production of specific enzymes, and secretion of extracellular polymeric substances (EPSs). This review synthesizes the understanding of electron exchange mechanisms between microorganisms and minerals and highlights potential applications in development of renewable energy production and pollutant remediation, which are topics of particular significance to future exploitation of biotechnology.

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Section: Environmental Engineering Remediationmentioning

confidence: 99%

Recent advances in the roles of minerals for enhanced microbial extracellular electron transfer

Dong

Chen

Yan

et al. 2020

Renewable and Sustainable Energy Reviews

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“…It should have high porosity and better biocompatibility to get attached with the biofilm. At the same time, the microbes involved in photocatalytic degradation can also grow in pores free from the influence of ROS and light radiation [21]. The types of carrier molecules are as follows:…”

Section: Carrier Moleculesmentioning

confidence: 99%

Photocatalysis for Wastewater Treatment with Special Emphasis on Plastic Degradation

Arumugam¹,

Meenkashisundaram²,

Sharma³

2020

Handbook of Nanomaterials and Nanocomposites for Energy and Environmental Applications

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Advanced oxidation process such as photocatalysis is seen as a potential future technology to offer clean water for various human needs. Through this process, different organic pollutants and recalcitrant chemicals are effectively removed from both water and wastewater. Some of the AOPs, such as ozonation (O 3), catalysis by iron ions, electrodes, metal oxides, UV/Fenton, UV/hydrogen peroxide (H 2 O 2), etc., generate harmful intermediates which restrict their full-scale implementation. Alternatively, irradiation techniques such as photocatalysis are a viable option and have shown to treat wastewater contaminated with hazardous chemicals, organic dyes, pesticides, antibiotics, viruses, bacteria, protozoa, etc., without producing toxic levels of by-products. This chapter reviews emerging aspects of photocatalysis for treatment of various recalcitrant pollutants with a special emphasis on polyethylene degradation. It summarizes the source, types, mechanism, and parameters of wastewater treatment using photocatalytic activity. Polyethylene is well known as serious cause of threats to human health and environment. Polyethylene, polystyrene, plastic film, and polypropylene degradation has been shown to occur via photocatalysis. This could be achieved using TiO 2 , ZnO, and doped and undoped metal oxides as photocatalysts. Also, photocatalytic degradation is compared with microbial techniques for polyethylene degradation along with brief reports on novel photobioreactors; a combination of microbial and photocatalytic reactors in degradation of polyethylene.

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“…Following its proposal, ICPB technology has been successfully applied to the degradation of refractory organic compounds such as phenol [11][12][13], 2,4,5-trichlorophenol [10,14] 2, 4-diaminotoluene [15] and tetracycline [16,17] as well as printing and dyeing wastewater [18,19]. Most photocatalytic carriers are inorganic materials, such as activated carbon, zeolite, glass, ceramics, etc., which have good treatment effect [20,21].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Photocatalytic Properties of a Bagasse Cellulose-Supported Nano-TiO2 Photocatalytic-Coupled Microbial Carrier

et al. 2020

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Intimate coupling of photocatalysis and biodegradation (ICPB) has shown promise in removing unwanted organic compounds from water. In this study, bagasse cellulose titanium dioxide composite carrier (SBC-TiO2) was prepared by low-temperature foaming methods. The optimum preparation conditions, material characterization and photocatalytic performance of the composite carrier were then explored. By conducting a single factor test, we found that bagasse cellulose with a mass fraction of 4%, a polyvinyl alcohol solution (PVA) with a mass fraction of 5% and 20 g of a pore-forming agent were optimum conditions for the composite carrier. Under these conditions, good wet density, porosity, water absorption and retention could be realized. Scanning electron microscopy (SEM) results showed that the composite carrier exhibited good biologic adhesion. X-ray spectroscopy (EDS) results confirmed the successful incorporation of nano-TiO2 dioxide into the composite carrier. When the mass concentration of methylene blue (MB) was 10 mg L−1 at 200 mL, 2 g of the composite carrier was added and the initial pH value of the reaction was maintained at 6, the catalytic effect was best under these conditions and the degradation rate reached 78.91% after 6 h. The method of preparing the composite carrier can aid in the degradation of hard-to-degrade organic compounds via ICPB. These results provide a solid platform for technical research and development in the field of wastewater treatment.

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Intimate coupling of photocatalysis and biodegradation for wastewater treatment: Mechanisms, recent advances and environmental applications

Cited by 178 publications

References 105 publications

Recent advances in the roles of minerals for enhanced microbial extracellular electron transfer

Recent advances in the roles of minerals for enhanced microbial extracellular electron transfer

Photocatalysis for Wastewater Treatment with Special Emphasis on Plastic Degradation

Preparation and Photocatalytic Properties of a Bagasse Cellulose-Supported Nano-TiO2 Photocatalytic-Coupled Microbial Carrier

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