The main role of fluoride in water is to prevent
by：Xintao Technology 2020-06-30
The results from scientific studies vary greatly concerning the amount of tooth decay reduction that can be credited to public water-fluoridation. Some studies indicate that the reduction in cavities is as much as 40%. Other researchers believe the benefit is only around 18%. Most dentists believe that the benefits are minimal. Access to fluoridated toothpaste, as well as regular in-office treatments are believed to provide the greatest benefit. The reasons for that are easy to understand. When you consume a beverage, the liquid is only on the teeth for a short period of time. It passes over the teeth and into the digestive system. Consumption of fluoride is of no benefit. In fact, consuming too much can be deadly. There have been several instances of over-fluoridation at public treatment facilities. In the US, there were four such instances between 1991 and 2010. Human error is the problem. There doesn't seem to be anything we can do about that. There is a negative role of fluoride in water when concentrations are too high. The World Health Organization recommends a maximum concentration of 1.5mg/L. In one case, the concentration was over 200mg per liter. The accident resulted in hundreds of illnesses and the death of one person. The usual symptoms of excessive intake include nausea and vomiting, which should reduce the likelihood of poisoning. But if a person had a weakened immune system or other health problems, the poisoning could still be fatal. Excessive consumption does not always cause illness. That's another problem, because the element has no smell or taste. You cannot tell whether a glass contains it or not, without scientific testing. So, long-term consumption of excessive amounts is possible and can lead to another negative role of fluoride in water; dental and skeletal fluoriosis. The symptoms include discoloration of the teeth, especially when children are exposed before their permanent teeth come in, and weakened bones. Fluoriosis usually occurs only in areas where the excessive concentration is naturally occurring. Fluoride is present in the rock formations. Rainwater passes over the rocks and carries the element into the groundwater. The concentrations in groundwater are highest after heavy rainfall or heavy snow melt. In some cases, it is necessary to use activated alumina to reduce the concentration to safe levels. Most public health organizations believe that the positive role of fluoride in water outweighs any negative side effect. Other contaminants cause more problems for public health. Now might be a good time to learn about those hazardous contaminants.
PSA nitrogen making
PSA technical(Pressure Swing Adsorption,PSA for short) :it’s a kind of afvanced gas separation technology,based on physical adsorption of gas molecule on the internal surface of adsorbent(porous solid substances),using adsorbents in the same pressure easy to absorb the high boiling point gas,difficult to absorb low boiling point gas.amd under high pressure adsorption amount of absorbed gas increases,under low pressure adsorption of absorbed gas to reduce the features to achieve gas separation.
Xintao 92% Alumina Grinding Ball for Indonesia Powder Industry
Dry grinding is widely used in mining, ceramics, powder and other industries. In view of the situation of raw materials polluted by grinding media abrasion, we have developed special dry grinding ball with high strength and low abrasion to solve this problem.
Application of Alumina Ceramic Balls
Ceramic balls can be divided into ceramic balls and grinding ceramic balls. Ceramic balls are widely used in petroleum, chemical, fertilizer, natural gas, environmental protection and other industries as the cover support material and tower packing of the catalyst in the reactor.
Paint resin industry
Activated molecular sieve power is dehydrated synthetic powerdery molecular sieve. With the character of highdispensability and rapid adsorb ability; it is used in some special adsorptive circumstances, such as being formless desiccant, being adsorbent mixed with other materials etc.
The packed column used for the separation of distillation is a vertical cylindrical vessel containing an appropriate packing bed supported and irrigated by the liquid flowing through a particular distributor. The bed height is determined by the packing mass transfers capacity and constrained are governed by allowable pressure drop and the overall column height.
Carbon Molecular Sieve for Food Preservation
Food Preservation Nitrogen Generator is a high-purity nitrogen generator specially designed for the food packaging and preservation industry according to the advanced PSA pressure swing adsorption principle, using carbon molecular sieve to separate nitrogen and oxygen from the compressed air. Provide dry and continuous pure nitrogen for food packaging, beverage stirring, fruit and vegetable storage, cereal fumigation, food nitrogen puffing and other purposes , energy saving and so on.
New automatic production line for molecular sieves with an annual output of 5,000 tons
In order to improve the influence and competitiveness of molecular sieve products in the industry, our company has built a new set of zeolite molecular sieve automatic production line with an annual output of 5,000 tons, which has solved the long delivery cycle and instability of product quality for customers.
Carbon Molecular Sieve for Nitrogen Tyre Inflator
Xintao's carbon molecular sieve is widely used in nitrogen generator , with high hardness, less ash, uniform particles, and high cost performance. The models selected by customers are usually CMS-240, CMS-260. The nitrogen concentration is 99.5-99.99% and above, which has won a series of praises from customers.
More Information on Molecular Sieves.
Molecular Sieves are sorts of desiccants that have varying properties from those of silica gel. These materials are artificially created of exceptionally permeable translucent substance made of metal-aluminosilicates. The appearance is of minuscule obscure pinkish globules made of a few inside holes interconnected by window openings of exact distances across.
Pressure Swing Adsorption (PSA) - Hydrogen Purification
Pressure Swing Adsorption (PSA) from Air Liquide Engineering & Construction is used to recover and purify hydrogen from a variety of hydrogen-rich streams. Xintao 5A Molecular Sieve for hydrogen production, is a special molecular sieves for hydrogen production by pressure swing adsorption.