A flow-circulation reactor for simultaneous photocatalytic degradation of ammonia and phenol using N-doped ZnO beads

Mandor, Hagar; El-Ashtoukhy, E-S.Z.; Abdelwahab, Ola; Amin, N.K.; Kamel, Dena A.

doi:10.1016/j.aej.2021.08.052

Cited by 9 publications

(1 citation statement)

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“…The combination of heterogenous photo-Fenton and photocatalysis enhances the degradation efficiency of pollutants as well as recyclability and overcomes many problems that conventional methods face [74]. Introducing polymer such as chitosan and PVA can enhance the performance of catalyst through enhanced mechanical properties and adsorption capacity [75]. Immobilization of photocatalysts such as ZnO or TiO 2 can help inhibit the recombination of electrons and holes, increasing •OH production.…”

Section: Photocatalytic Degradationmentioning

confidence: 99%

Wastewater Treatment by Polymeric Microspheres: A Review

Lee

Patel

2022

Polymers

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This review addresses polymer microspheres used as adsorbent for wastewater treatment. The removal of various pollutants (including dyes, heavy metal ions, and organic pollutants) is a prominent issue, as they can cause severe health problems. Porous microspheres can provide large specific area and active sites for adsorption or photo degradation. Enhancement in performance is achieved by various modifications, such as the introduction of nanoparticles, magnetic particles, and ZIF-8. Some microspheres were synthesized from synthetic polymers such as vinylic polymer and polydopamine (PDA) through a facile fabrication process. Natural polymers (such as cellulose, alginate, and chitosan) that are biodegradable and eco-friendly are also used. The adsorbents used in industrial application require high adsorption capacity, thermal stability, and recyclability. Batch adsorption experiments were conducted to investigate the optimal conditions, influence of related factors, and adsorption capacities. Insights regarding the adsorption mechanisms were given from the kinetic model, isotherm model, and various characterization methods. The recyclability is investigated through regeneration ratio, or their maintenance of their capability through repeated adsorption-desorption cycles. The high potential of polymer microsphere for the removal of pollutants from wastewater is shown through the high adsorption capacities, environmentally friendliness, and high stability.

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Section: Photocatalytic Degradationmentioning

confidence: 99%