1 Application of different Nanocatalysts in industrial effluent treatment: A review https://jourcc.com/index.php/jourcc/article/view/jcc315 10.52547/jcc.3.1.5 20.1001.1.26765837.2021.3.6.5.8 1 The manufacturing, application, and design of chemical processes and products that minimize or remove waste and the use of dangerous and toxic reagents are referred to as green chemistry. Green chemistry is made up of twelve principles, one of which is catalysis. The role of catalysis is to accelerate the reaction by introducing a substance called a catalyst. Because of their high efficiency, productivity, activity, and selectivity, nanocatalysts have recently received many interests. Nanocatalysts are characterized by their high surface area to volume ratio, as well as their nanoscale forms and sizes. One of the significant applications of nanocatalysts is wastewater and wastewater purification. Green and bio-synthesized nanocatalysts could be used efficiently to remove heavy metals, medicinal, organic, and inorganic pollutants from the wastewater systems. This paper reviews nanocatalysts based on noble and magnetic nanocatalysts, as well as metal catalysts supported by organic polymers, and discusses their industrial effluent treatment mechanisms. 43 56 Sara Eskandarinezhad Yazd University Iran s.eskandari.nezhad@gmail.com Reza Khosravi Ferdowsi University of Mashhad Iran info@jourcc.com Mohamadamin Amarzadeh Petroleum University of Technology Iran info@jourcc.com Piyal Mondal Indian Institute of Technology Guwahati India info@jourcc.com Fernando Jorge Correa Magalhães Filho Universidade Católica Dom Bosco Brazil info@jourcc.com Green Chemistry Magnetic nanocatalyst Noble nanocatalysts Organic polymer-supported metal catalysts Article5.pdf [1] H. Hu, J.H. Xin, H. Hu, X. Wang, D. Miao, Y. 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