Recent developments in recalcitrant organic pollutants degradation using immobilized photocatalysts

Fouad, Kareem; Bassyouni, M.; Alalm, Mohamed Gar; Saleh, Mamdouh Y.

doi:10.1007/s00339-021-04724-1

Cited by 43 publications

(22 citation statements)

References 231 publications

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“…Although such processes can degrade many pollutants, many others are resistant because of the complex chemical structure and high stability. Moreover, the biological treatment systems are insufficient because it depends on micro-organisms that have difficulties consuming toxic organics (Teoh and Li 2020;Fouad et al 2021a).…”

Section: Drawbacks Of Conventional Wastewater Treatmentsmentioning

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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Section: Drawbacks Of Conventional Wastewater Treatmentsmentioning

confidence: 99%

Solar photo-oxidation of recalcitrant industrial wastewater: a review

et al. 2022

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“…In addition to this, another method of recovering the NPs is immobilization of NPs inside the bed of the reactor through various immobilization techniques such as the sol-gel method, sputtering method, etc. [77][78][79], and usage of nanocomposite film, which was also attempted by various researchers. Hence, more attention and research on this aspect to prevent environmental risk is mandatory.…”

Section: Environmental and Economic Impactmentioning

confidence: 99%

Recent Advances and Perspectives of Nanotechnology in Anaerobic Digestion: A New Paradigm towards Sludge Biodegradability

Banu

Sharmila²

2022

Sustainability

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Anaerobic digestion (AD) is the strategy of producing environmentally sustainable bioenergy from waste-activated sludge (WAS), but its efficiency was hindered by low biodegradability. Hence, the usage of nanomaterials was found to be essential in enhancing the degradability of sludge due to its nanostructure with specific physiochemical properties. The application of nanomaterials in sludge digestion was thoroughly reviewed. This review focused on the impact of nanomaterials such as metallic nanoparticles, metal oxide nanoparticles, carbon-based nanomaterials, and nanocomposite materials in AD enhancement, along with the pros and cons. Most of the studies detailed that the addition of an adequate dosage of nanomaterial has a good effect on microbial activity. The environmental and economic impact of the AD enhancement process is also detailed, but there are still many existing challenges when it comes to designing an efficient, cost-effective AD digester. Hence, proper investigation is highly necessary to assess the potency of utilizing the nanomaterials in enhancing AD under various conditions.

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“…[16][17][18] In addition, photocatalysts have the advantages of stable properties, good reusability, and the ability to work at low concentrations, making them promising for a wide range of applications. 19 The core of photocatalysis lies in the preparation of photocatalysts. The research and development of an efficient, non-toxic photocatalyst has always been the focus of research by many scholars.…”

Section: Introductionmentioning

confidence: 99%

“…16–18 In addition, photocatalysts have the advantages of stable properties, good reusability, and the ability to work at low concentrations, making them promising for a wide range of applications. 19…”

Section: Introductionmentioning

confidence: 99%