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Ceramic Water Filter
Ceramic water filters (CWF) are an inexpensive and effective type of water filter that rely on the small pore size of ceramic material to filter dirt, debris, and bacteria out of water. This makes them ideal for use in developing countries, and portable ceramic filters are commonly used in backpacking. Method of action Similar to other methods of filtering water, the filter removes particles larger than the size of the pores in the filter material. Typically bacteria, protozoa, and microbial cysts are removed. However, filters are typically not effective against viruses since they are small enough to pass through to the "clean" side of the filter. Ceramic water filters (CWF) may be treated with silver in a form that will not leach away. The silver helps to kill or incapacitate bacteria and prevent the growth of mold and algae in the body of the filter. Ceramic filtration does not remove chemical contaminants, ''per se''. However, some manufacturers (especially of ceramic candle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Chlorine
Chlorine is a chemical element with the Symbol (chemistry), symbol Cl and atomic number 17. The second-lightest of the halogens, it appears between fluorine and bromine in the periodic table and its properties are mostly intermediate between them. Chlorine is a yellow-green gas at room temperature. It is an extremely reactive element and a strong oxidising agent: among the elements, it has the highest electron affinity and the third-highest electronegativity on the revised Electronegativity#Pauling electronegativity, Pauling scale, behind only oxygen and fluorine. Chlorine played an important role in the experiments conducted by medieval Alchemy, alchemists, which commonly involved the heating of chloride Salt (chemistry), salts like ammonium chloride (sal ammoniac) and sodium chloride (common salt), producing various chemical substances containing chlorine such as hydrogen chloride, mercury(II) chloride (corrosive sublimate), and hydrochloric acid (in the form of ). However ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Water Filters
A water filter removes impurities by lowering contamination of water using a fine physical barrier, a chemical process, or a biological process. Filters cleanse water to different extents, for purposes such as: providing agricultural irrigation, accessible drinking water, public and private aquariums, and the safe use of ponds and swimming pools. Methods of filtration Filters use sieving, adsorption, ion exchanges, biofilms and other processes to remove unwanted substances from water. Unlike a sieve or screen, a filter can potentially remove particles much smaller than the holes through which its water passes, such as Nitrates or germs like ''Cryptosporidium.'' Among the methods of filtration, notable examples are sedimentation, used to separate hard and suspended solids from water and activated charcoal treatment, where the boiled water is poured through a piece of cloth to trap undesired residuals. Additionally, the use of machinery to work on desalinization and purificatio ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Appropriate Technology
Appropriate technology is a movement (and its manifestations) encompassing technological choice and application that is small-scale, affordable by locals, decentralized, labor-intensive, energy-efficient, environmentally sustainable, and locally autonomous. It was originally articulated as intermediate technology by the economist Ernst Friedrich "Fritz" Schumacher in his work ''Small Is Beautiful.'' Both Schumacher and many modern-day proponents of appropriate technology also emphasize the technology as people-centered. Appropriate technology has been used to address issues in a wide range of fields. Well-known examples of appropriate technology applications include: bike- and hand-powered water pumps (and other self-powered equipment), the universal nut sheller, self-contained solar lamps and streetlights, and passive solar building designs. Today appropriate technology is often developed using open source principles, which have led to ''open-source appropriate technology'' ( ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
List Of Water Supply And Sanitation By Country
This list of water supply and sanitation by country provides information on the status of water supply and sanitation at a national or, in some cases, also regional level. Water supply and sanitation by country * Water supply and sanitation in Afghanistan * Water supply and sanitation in Algeria * Water supply and sanitation in Argentina * Water supply and sanitation in Australia * Water supply and sanitation in Bangladesh * Water supply and sanitation in Belgium * Water supply and sanitation in Benin * Water supply and sanitation in Bolivia * Water supply and sanitation in Brazil * Water supply and sanitation in Burkina Faso * Water supply and sanitation in Cambodia * Water supply and sanitation in Canada * Water supply and sanitation in Chile * Water supply and sanitation in China * Water supply and sanitation in Colombia * Water supply and sanitation in Costa Rica * Water supply and sanitation in Cuba * Water supply and sanitation in Denmark * Water supply and sanitation in the ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
YouTube
YouTube is a global online video platform, online video sharing and social media, social media platform headquartered in San Bruno, California. It was launched on February 14, 2005, by Steve Chen, Chad Hurley, and Jawed Karim. It is owned by Google, and is the List of most visited websites, second most visited website, after Google Search. YouTube has more than 2.5 billion monthly users who collectively watch more than one billion hours of videos each day. , videos were being uploaded at a rate of more than 500 hours of content per minute. In October 2006, YouTube was bought by Google for $1.65 billion. Google's ownership of YouTube expanded the site's business model, expanding from generating revenue from advertisements alone, to offering paid content such as movies and exclusive content produced by YouTube. It also offers YouTube Premium, a paid subscription option for watching content without ads. YouTube also approved creators to participate in Google's Google AdSens ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ron Rivera (public Health)
Ronald Rivera (August 22, 1948 – September 3, 2008) was an American activist of Puerto Rican descent who is best known for promoting an inexpensive ceramic water filter developed in Guatemala by the chemist Fernando Mazariegos and used to treat gray water in impoverished communities and for establishing community-based factories to produce the filters around the world. Early years Rivera was born in the Bronx borough of New York City, of Puerto Rican parents. He was raised in both New York City and Puerto Rico. Rivera graduated from The World University in San Juan, Puerto Rico. He also studied at the School for International Training.Grimes, William (September 14, 2008)Ron Rivera, Potter Devoted to Clean Water, Dies at 60.''New York Times''Ron Rivera profile via Changemakers] Rivera worked with the |
Louis Pasteur
Louis Pasteur (, ; 27 December 1822 – 28 September 1895) was a French chemist and microbiologist renowned for his discoveries of the principles of vaccination, microbial fermentation and pasteurization, the latter of which was named after him. His research in chemistry led to remarkable breakthroughs in the understanding of the causes and preventions of diseases, which laid down the foundations of hygiene, public health and much of modern medicine. His works are credited to saving millions of lives through the developments of vaccines for rabies and anthrax. He is regarded as one of the founders of modern bacteriology and has been honored as the "father of bacteriology" and the "father of microbiology" (together with Robert Koch; the latter epithet also attributed to Antonie van Leeuwenhoek). Pasteur was responsible for disproving the doctrine of spontaneous generation. Under the auspices of the French Academy of Sciences, his experiment demonstrated that in sterilized ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Henry Doulton
Sir Henry Doulton (25 July 1820 – 18 November 1897) was an English businessman, inventor and manufacturer of pottery, instrumental in developing the firm of Royal Doulton. Life Born in Vauxhall, Henry was the second of the eight children of John Doulton (1793–1873), a pottery manufacturer, and his wife, Jane Duneau, a widow from Bridgnorth in Shropshire. His brother, Frederick Doulton, became Member of Parliament for Lambeth from 1862 until 1868. His father had become a partner in a pottery business in 1815 but Henry was the most academic of his children. Henry spent two years at the University College School where he developed a love of literature. His father had thought Henry the least likely to join the family business, perhaps being destined for a profession, but in 1835, he joined the firm, as did all his brothers other than Frederick.Clement (2004) One of the first results of his many experiments was the production of good enamel glazes. In 1846 he initiated in Lambet ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
MSABI Tembo Filter
MSABI is a non-governmental organization founded by Dale Young in 2009 in Ifakara, Tanzania. Its projects focus on water sanitation, hygiene, and education. Name and history Engineer Dale Young moved to Tanzania in 2007 with his partner who was conducting malaria research. He founded MSABI in 2009 after witnessing a cholera outbreak that resulted from unclean drinking water. The name stands for Maji Safi kwa Afya Bora Ifakara, which translates to "Safe Water for Better Health Ifakara." MSABI's projects focus on installing water pumps, distributing filter pots, building latrines, and educating people on sanitation and hygiene. The aim is to combat diarrhoea, cholera, typhoid, and trachoma, which all may be caused from poor quality drinking water. MSABI partners with Engineers Without Borders (UK) for surveying, drilling, manufacturing, and capacity building projects. EWB UK also provides international training courses at MSABI. MSABI has provided more than 60 water points an ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ceramic Water Filter
Ceramic water filters (CWF) are an inexpensive and effective type of water filter that rely on the small pore size of ceramic material to filter dirt, debris, and bacteria out of water. This makes them ideal for use in developing countries, and portable ceramic filters are commonly used in backpacking. Method of action Similar to other methods of filtering water, the filter removes particles larger than the size of the pores in the filter material. Typically bacteria, protozoa, and microbial cysts are removed. However, filters are typically not effective against viruses since they are small enough to pass through to the "clean" side of the filter. Ceramic water filters (CWF) may be treated with silver in a form that will not leach away. The silver helps to kill or incapacitate bacteria and prevent the growth of mold and algae in the body of the filter. Ceramic filtration does not remove chemical contaminants, ''per se''. However, some manufacturers (especially of ceramic candle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carbon
Carbon () is a chemical element with the symbol C and atomic number 6. It is nonmetallic and tetravalent In chemistry, the valence (US spelling) or valency (British spelling) of an element is the measure of its combining capacity with other atoms when it forms chemical compounds or molecules. Description The combining capacity, or affinity of an ...—its atom making four electrons available to form covalent bond, covalent chemical bonds. It belongs to group 14 of the periodic table. Carbon makes up only about 0.025 percent of Earth's crust. Three Isotopes of carbon, isotopes occur naturally, Carbon-12, C and Carbon-13, C being stable, while Carbon-14, C is a radionuclide, decaying with a half-life of about 5,730 years. Carbon is one of the Timeline of chemical element discoveries#Ancient discoveries, few elements known since antiquity. Carbon is the 15th Abundance of elements in Earth's crust, most abundant element in the Earth's crust, and the Abundance of the c ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
