About Attapulgite Clay
Attapulgite, also known as palygorskite or palygorskite, is a layered, chain-structured, magnesium-rich aluminosilicate clay mineral. Safchenko was discovered in the Urals of the Soviet Union in 1862, and in 1913 he was named Palygorskite based on the discovered mining area. This mineral was also later found in bleached earth in the Attapulgus region of Georgia in the United States of America and in the Mormore region of France, and was adopted under the name of Attapulgite in 1935 by Dila Belente. In 1976, a Chinese scholar, Xu Jiquan, translated into "attapulgite" according to the sound of attapulgite while taking into account the crystal structure characteristics of the ore, which has been used in China in recent years.
At the beginning of the 1980s, attapulgite clay minerals were found in the Mingguang region of Anhui Province, China and the Luan region of Jiangsu Province. The crystal shape is rod-shaped, fibrous, and needle-shaped, with a length of 0.5-5 microns and a width of 0.05-0.15 microns, which is 2: Type 1 clay mineral, that is, two layers of silicon-oxygen tetrahedron and one layer of aluminum-oxygen octahedron.
The attapulgite clay aggregate is a soil-like block structure with a color of off-white, turquoise, yellowish or light green, oily luster, light specific gravity, Mohs hardness 2-3, viscosity and plasticity when wet, and small shrinkage when dry. It has no cracks, strong water absorption, can reach more than 150%, pH = 8.5, due to the internal porous channel, the specific surface area is large, which can reach more than 350m2 / g, most of the cations, water molecules and certain sizes of organic Molecules can be directly absorbed into the pores, and its electrochemical performance is stable, and it is not easy to be flocculated by the electrolyte.
Attapulgite clay minerals have the properties of nanomaterials and are nanomineral materials with nanochannel structure. Because of their very large specific surface area and certain ion exchange properties, they are widely used as adsorbents, catalyst carriers and antibacterial agent carriers. .