Many metals occur in nature as oxides or sulfides, but gold is only found naturally bound to tellurium, antimony or bismuth. What is the reason for this?
Many metals occur in nature as oxides or sulfides, but gold is only found naturally bound...
1. Many important metals occur as sulfide, arsenide, and antimonide minerals, especially in the Sudbury mineral complex. The first step in processing these ores involves “roasting” the ore in air to produce the metal or metal oxide, along with nonmetal oxides that can be serious pollutants if not trapped. Suppose that you roast 2.00 kg of the mineral marcasite, FeS2. The balanced equation for the reaction is: 4 FeS2 + 11 02 → 2 Fe2O3 + 8 SO2 (a) How...
10. Write a one-page summary of the attached paper? INTRODUCTION Many problems can develop in activated sludge operation that adversely affect effluent quality with origins in the engineering, hydraulic and microbiological components of the process. The real "heart" of the activated sludge system is the development and maintenance of a mixed microbial culture (activated sludge) that treats wastewater and which can be managed. One definition of a wastewater treatment plant operator is a "bug farmer", one who controls the aeration...