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Chenab, Karim Khanmohammadi; Sohrabi, Beheshteh; Jafari, Amir; Ramakrishna, Seeram
Materials today chemistry, June 2020, 2020-06-00, Volume: 16Journal Article
Global efforts for engineering desired materials which are able to treat the water sources still are ongoing in the bench level methods. Considering adsorbent and photocatalytic materials as the main reliable candidates still are encountering with struggles because of many challenges that restrict their large-scale application. This review comprehensively considered the recent advanced materials water treatment methods which involve to magnetic, activated carbon, carbon nanotubes (CNTs), graphene (G), graphene oxide (GO), (Graphene) quantum dots, carbon nanorods, carbon nano-onions, and reduced graphene oxide (RGO), zeolite, silica and clay-based nanomaterials. The adsorption and photocatalytic properties of these nanomaterials introduced them as highly potent option for heavy metal ions and organic dyes removal and photocatalytic degradation. High specific surface area in conjugation with presenting higher kinetics of adsorption and decomposition are the main characteristics of these materials which make them appropriate to treat wastewater even in ultralow concentration of the pollutants. Considering the mechanistic aspects of the adsorption and photocatalytic decomposition process, challenges and opportunities were other subjects that have been highlighted for the discussed nanomaterials. In term of the adsorption approaches, the mechanism of adsorptions and their influence on the maximum adsorption capacity were discussed and also for photocatalyst approach the radical active spices and their role in kinetic and efficiency of the organic pollutant decomposition were provided a deep discussion. Display omitted •Adsorption and photodegradation approaches can be as efficient methods for water treatment.•In adsorption approach, nanomaterials can adsorb heavy metal ions and dye pollutants.•In photocatalytic methods, the organic dyes can degrade under light irradiation condition.•High adsorption capacity and photocatalytic reaction efficiency are the main advantages of these methods.
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