Application of Nanocatalysts in Advanced Oxidation Processes for Wastewater Purification: Challenges and Future Prospects

Abstract

The increase in population demands for industrialization and urbanization which led to the introduction of novel hazardous chemicals in our environment. The most significant parts of these harmful substances found in water bodies remain in the background, causing a health risk to humans and animals. It is critical to remove these toxic chemicals from the wastewater to keep a cleaner and greener environment. Hence, wastewater treatment is a challenging area these days to manage liquid wastes effectively. Therefore, scientists are in search of novel technologies to treat and recycle wastewater, and nanotechnology is one of them, thanks to the potential of nanoparticles to effectively clean wastewater while also being ecologically benign. However, there is relatively little information about nanocatalysts’ applicability, efficacy, and challenges for future applications in wastewater purification. This review paper is designed to summarize the recent studies on applying various types of nanocatalysts for wastewater purification. This review paper highlights innovative work utilizing nanocatalysts for wastewater applications and identifies issues and challenges to overcome for the practical implementation of nanocatalysts for wastewater treatment.

Biofuels and Nanocatalysts: Python Boosting Visualization of Similarities

“…According to the existing literature [ 24 , 25 , 26 ], relevant examples of NCs include nanoparticles containing cobalt [ 27 , 28 , 29 , 30 , 31 ], gold [ 32 , 33 , 34 ], iron [ 35 , 36 , 37 , 38 , 39 , 40 ], nickel [ 41 , 42 , 43 , 44 ], palladium [ 45 , 46 , 47 , 48 , 49 , 50 ], and platinum [ 42 , 51 , 52 , 53 ]. Among the most diverse uses of NCs are biodiesel production [ 54 , 55 , 56 , 57 , 58 , 59 , 60 , 61 , 62 , 63 ], dyeing [ 64 , 65 , 66 , 67 , 68 , 69 , 70 , 71 , 72 , 73 ], energy storage [ 74 , 75 ,…”

Asterarcys quadricellulare algae-mediated copper oxide nanoparticles as a robust and recyclable catalyst for the degradation of noxious dyes from wastewater

“…14,15 This method involves the use of a photocatalyst, typically composed of metal oxide nanoparticles, to facilitate the breakdown of organic pollutants under the inuence of light. 16 Metallic nanomaterials obtained from earth-abundant and inexpensive metals have gained considerable attention owing to their potential as practicable alternatives to rare and expensive metals such as gold, 17 silver, 18,19 platinum, 20 titanium, 21 etc. Among many nanomaterials understudy the copper oxide nanoparticles (CuO NPs) have gained considerable attention due to their desirable physical and chemical properties, including catalytic, optical, electrical, and magnetic properties.…”

“…14,15 This method involves the use of a photocatalyst, typically composed of metal oxide nanoparticles, to facilitate the breakdown of organic pollutants under the influence of light. 16…”

Porous calcium copper titanate electrodes for paracetamol degradation by electro-oxidation via CuO-induced peroxymonosulfate activation

“…[13][14][15][16][17] These methods allow the in situ generation of hydroxyl radicals that act as non-selective oxidizing agents to destroy non-biodegradable organic molecules in wastewater. 4,6,[18][19][20] These AOPs include catalytic ozonation procedures, sulfate-based AOPs, and treatment with ultrasound, electro-catalytic oxidation, and photocatalysis. 12,[21][22][23][24] Electrocatalytic oxidation has been extensively studied for wastewater treatment due to its simplicity, capacity to mineralize pollutants without producing secondary pollution, and high oxidation rates by losing electrons at the anode or by oxidizing reactive species, leading to the organic pollutant transformation into CO 2 and H 2 O.…”