Adsorptive removal of pollutants using nano adsorbents
Nanotechnology is the field of technology that deals with study, application and manufacturing things on microscopic scale, mostly between one and 100 nanometers. The major characteristics of these particles are its high surface area to volume ratio that is responsible for its extensive use in the field of mechanics, medicine, optics, biotechnology, microbiology, electronics, environmental remediation and branches of engineering and material science. Several methods are used to synthesize nanoparticles among which physical and chemical methods are most popular ones for synthesizing nanoparticles The synthesis of metal or metal oxide nanoparticles requires certain strong chemicals that are necessarily reducing agents, which in turn leads to impose severe impact on the environment. To avoid this harmful consequences researchers are developing methods that are effective and reliable and pose minimal or zero impact on environment.
Treating wastewater using nanomaterials as adsorbent is more efficient and effective to remove the toxic contaminants compared to conventional methods. Nanomaterials used for treating toxic pollutants must satisfy the following conditions: (1) the nanomaterial should adsorb the pollutants even at low ppm level (2) The pollutants bonded on nanomaterials should be easily removed using solvent (3) The nanomaterials must be nontoxic (4) The nanomaterials should have capacity and reusable . The properties of nanomaterials like low cost, higher surface area and high specific affinity makes the nanomaterial a viable option for removal of pollutants from wastewater .
Hence, it is very essential to discover a reliable, efficient and sustainable method for the synthesis of nanomaterials. The method adopted should be economically reasonable, sustainable, and socially adaptable. Also the availability of raw materials and natural resources are the factors that has to be given extreme importance while finalizing a method.
H, Sridevi, "Adsorptive removal of pollutants using nano adsorbents" (2022). Technical Collection. 77.