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Arpico Super Centre also popularly simply known as Arpico is a chain of supermarkets which is also regarded as a departmental store located in Sri Lanka owned by Richard Pieris & Company. The retail shopping mall was initially started with the concept of supermarket and then transformed its business operations as a supercentre.
Keells is a Sri Lankan supermarket chain operated by Jaykay Marketing Services (Pvt) Ltd., a subsidiary of the John Keells Group. [1] Established in 1991, [1] [2] Keells has grown to operate 135 outlets across the country, positioning itself as one of the leading retail chains in Sri Lanka alongside other retailers such as Cargills, Glomark, Spar, and Arpico.
Richard Piries Company is the market leader and the pioneer in the tyre Retread industry of Sri Lanka and commands a market share of nearly 60%. In addition to that, it has become the largest Retreader in the whole of South Asia which is a remarkable achievement for a Sri Lankan company.
Ammonium thiosulfate (ammonium thiosulphate in British English) is an inorganic compound with the formula [NH 4] 2 S 2 O 3. It is white crystalline solid with ammonia odor, readily soluble in water , slightly soluble in acetone and insoluble in ethanol and diethyl ether .
Keells Krest brand is one the 100 most valuable brands in Sri Lanka. The brand value of Keells Krest is estimated to be worth LKR1,127 million in 2022, a 12.6% growth from the previous year. [7] Keells Food Product is ranked 15th in LMD 100 second board in its 2020/21 edition. LMD 100 ranks publicly quoted companies of Sri Lanka by revenue ...
Gold cyanidation (also known as the cyanide process or the MacArthur–Forrest process) is a hydrometallurgical technique for extracting gold from low-grade ore through conversion to a water-soluble coordination complex. It is the most commonly used leaching process for gold extraction. [1]
Bioleaching is the extraction or liberation of metals from their ores through the use of living organisms.Bioleaching is one of several applications within biohydrometallurgy and several methods are used to treat ores or concentrates containing copper, zinc, lead, arsenic, antimony, nickel, molybdenum, gold, silver, and cobalt.
Sodium thiosulfate and ammonium thiosulfate have been proposed as alternative lixiviants to cyanide for extraction of gold from ores [8] and printed circuit boards. [9] The complex [Au(S 2 O 3) 2] 3-is assumed to be the principal product in such extractions. Presently cyanide salts are used on a large scale for that purpose with obvious risks. [8]