Nano Materials in Water and Waste Water Treatment
Author : Dr. Srinivasa Rao Vanukuru
Abstract :
Providing clean and affordable water to meet human needs is a grand challenge in 21st century. Now a days there is a continuously increasing worldwide concern for the development of wastewater treatment technologies. The utilization of iron oxide nanomaterials has received much attention due to their unique properties, such as extremely small size, high surface-area-to-volume ratio, surface modifiability, excellent magnetic properties and great biocompatibility. A range of environmental clean-up technologies have been proposed in wastewater treatment which applied iron oxide nanomaterials as nanosorbents and photo catalysts. Moreover, iron oxide based immobilization technology for enhanced removal efficiency tends to be an innovative research point.
Worldwide, pure water supply struggles to keep up with the fast growing demand. In the area of water purification, nanotechnology offers the possibility of an efficient removal of pollutants and germs. Today nanoparticles, nanomembrane and nanopowder used for detection and removal of chemical and biological substances include metals (e.g. Cadmium, copper, lead, mercury, nickel, zinc), nutrients (e.g. Phosphate, ammonia, nitrate and nitrite), cyanide, organics, algae (e.g. cyanobacterial toxins) viruses, bacteria, parasites and antibiotics. Nanomaterials (Titania, carbon nanotubes (CNTs), zero-valent iron, dendrimers and silver nanomaterials) which are currently used in environmental remediation and particularly in water purification.
Keywords :
Nanoparticle, dendrites, zeolite, ceramics, nanosilver.
