Non-contaminated lakes are “aerobic” (oxygenated) and maintain “oligotrophic” (very low levels of nutrients) condition. Limited number algae grow in such lakes due to limited amount of nutrient available to them. Such lakes are also suitable for the fish population and support aerobic microbes. Facultative anaerobic organism cannot survive in such environment. A facultative anaerobic organism [...]
Geochemistry
Eutrophication of lakes due to phosphate contamination
July 25th, 2011 | by Editor | published in Geochemistry | Leave A Comment »
Calculate Hardness of Water using Excel Spreadsheet: Geochemistry Tips
July 11th, 2011 | by Editor | published in Featured, Geochemistry | Leave A Comment »
July 11, 2011 (Coal Geology) Hard water is water referes to the alkaline earth ion concentrations. The primary alkaline earth ions are Ca2+ and Mg2+. Calcium usually dominates over magnesium concentration. Some important Points: Hard water is generally not harmful to one’s health pose serious problems in industrial settings, where water hardness is monitored to avoid [...]
The Unified Soil Classification System (USCS): Brief introduction
July 6th, 2011 | by Editor | published in Geochemistry | Leave A Comment »
If you are prepare for the the ASBOG exam, don’t forget to glance over the The Unified Soil Classification System (USCS). The Unified Soil Classification System (USCS) is a soil classification system used in engineering and geology to describe the texture and grain size of a soil. The classification system can be applied to most [...]
Pyroxenes: Review for the ASBOG Exam
July 6th, 2011 | by Editor | published in ASBOG Guide, Geochemistry | Leave A Comment »
The pyroxenes are a group of important rock-forming inosilicate minerals found in many igneous and metamorphic rocks. They share a common structure consisting of single chains of silica tetrahedra and they crystallize in the monoclinic and orthorhombic systems. Pyroxenes have the general formula XY(Si,Al)2O6 (where X represents calcium, sodium, iron+2 and magnesium and more rarely [...]
Thiobacillus ferrooxidans and Coal Mining: A Faster Way of Producing Acid Mine Drainage
April 20th, 2011 | by Ankan Basu | published in Featured, Geochemistry | 3 Comments »
April 20, 2011 (Coal Geology) Thiobacillus ferrooxidans (AKA Acidithiobacillus ferrooxidan) is one of the most commonly found bacteria related to coal mining. As coal forms in a reducing environment, sulfide minerals are commonly found in coal deposits – such as pyrite, arsenopyrite etc. The sulfide minerals are oxidized to form sulfate if exposed to oxygen [...]
