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Carbon nanotubes have gained much attention for its use as wastewater and water filter. Carbon nanotube’s mechanical, electrical and chemical properties made it unique and an ideal candidate for research since 1990. Carbon nanotube combined with electrochemistry proved to be the best method for water and wastewater purification ...
Crystal filter designs from the 1960s allowed for true [clarification needed] Chebyshev, Butterworth, and other typical filter types. Crystal filter design continued to improve in the 1970s and 1980s with the development of multi-pole monolithic filters, widely used today to provide IF selectivity in communication receivers.
Zeolites are widely used as ion-exchange beds in domestic and commercial water purification, softening, and other applications. Evidence for the oldest known zeolite water purification filtration system occurs in the undisturbed sediments of the Corriental reservoir at the Maya city of Tikal, in northern Guatemala. [26]
The permeate water from a NF separation is demineralised and may be disposed to large changes in pH, thus providing a substantial risk of corrosion in piping and other equipment components. To increase the stability of the water, chemical addition of alkaline solutions such as lime and caustic soda is employed.
Permanent water chlorination began in 1905, when a faulty slow sand filter and a contaminated water supply led to a serious typhoid fever epidemic in Lincoln, England. [44] Alexander Cruickshank Houston used chlorination of the water to stem the epidemic. His installation fed a concentrated solution of chloride of lime to the water being treated.
Filtration is a physical separation process that separates solid matter and fluid from a mixture using a filter medium that has a complex structure through which only the fluid can pass. Solid particles that cannot pass through the filter medium are described as oversize and the fluid that passes through is called the filtrate. [1]
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