Modern Water Purification Technologies
In this article, we review serious water purification methods
Nanofiltration Water Purification Technology
Nanotechnology involves several approaches and processes that utilize materials at the atomic or molecular scale. Nano-based water purification processes are highly efficient and cost-effective compared to conventional methods. Major applications of nanotechnology in water treatment processes include silver nanoparticles, zero-valent iron (ZVI), nanostructured photocatalysts, nanomembranes, and nanoreactors. The high surface-to-volume ratio of nanoparticles enhances the adsorption of chemical and biological particles At the same time, it enables the removal of pollutants at very low concentrations. Nanoparticles have specific physical and chemical properties for removing metal pollutants from water. Carbon nanotubes (CNTs) are one of the prominent nanomaterials used in water treatment. CNT-based filtration systems can remove organic, inorganic, and biological compounds from water
Electrospun Nanofiber Membrane
Membrane filtration, as a branch of nanotechnology, plays a vital role in water purification because conventional water treatment processes such as flocculation, sedimentation, coagulation, and activated carbon are unable to remove organic pollutants to ideal levels. Recent advancements in filtration have been developed based on nanoporous electrospun membranes. These membranes are made from materials such as cellulose nitrate, polyvinyl chloride, polyacrylonitrile, cellulose acetate, aromatic polyamide They are made from aliphatic polyamide, polysulfone, polycarbonate, polytetrafluoroethylene, and other polymers. Electrospun nanofibers are highly effective at reducing water turbidity in the purification process. Electrospinning is a simple, novel process for fabricating nanofiber membranes based on producing fibers ranging from micro to nano scale through electrostatic repulsive forces. This new method involves less time and cost. Nanofiber membranes produced by electrospinning have shown many positive results in laboratory experiments
Acoustic Nanotube Technology
Acoustic nanotube technology was invented by scientists at NASA's Johnson Space Center. In this case, nanotechnology is used acoustically instead of pressure to guide water through small-diameter carbon nanotubes. This technology is based on an acoustic molecular sheet that is integrated with carbon nanotubes and allows water molecules to pass through while blocking larger molecules and pollutants This method consumes less energy than traditional filtration systems and, instead of removing contaminants from the water, diverts the water away from the contaminants. This process also eliminates the need for backwashing the filtration system. Initial applications of acoustic nanotube technology are in municipal water plants, medical facilities, laboratories, distilleries, desalination plants, industrial facilities, wastewater treatment plants, and the consumer sector. This innovation is scalable by integrating multiple filters according to users' filtration needs NASA's patented acoustic nanotube technology has been made available to be turned into a commercial water purification product
Photocatalytic water treatment
Photocatalytic water treatment has gained popularity in recent years due to its efficiency in treating polluted water. This technology uses a photocatalyst and ultraviolet (UV) rays to remove toxic substances from water. Panasonic developed this technology, attaching the photocatalyst (titanium dioxide) to a commercial adsorbent and catalyst called zeolite to ensure the effective separation and recovery of the photocatalysts from the water for reuseTitanium dioxide can convert a wide range of organic compounds into safe end products. This catalyst uses ultraviolet radiation, sunlight, or artificial light to break down materials. Photocatalysis can break down a wide range of organic substances, estrogens, pesticides, dyes, crude oil, and microbes such as viruses and chlorine-resistant pathogens, as well as inorganic compounds like nitrogen oxides. Photocatalytic systems are suitable for use in water and wastewater treatment facilities. and can treat industrial wastewater contaminated with high loads of organic matter or metals
SunSpring Hybrid water purification technolog
As its name suggests, SunSpring Hybrid is a hybrid water purification system that operates on wind and solar power. This portable microbiological system provides safe and sufficient drinking water to developing communities around the world. By physically removing particles, bacteria, and viruses, it will also reduce the percentage of pathogens in most freshwater (without salt).
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