NEW YORK, Dec. 27, 2010 (Coal Geology) — Exposure to fluoride may lower children’s intelligence says a study pre-published in Environmental Health Perspectives, a publication of the National Institute of Environmental Health Sciences (online December 17, 2010). Fluoride is added to 70% of U.S. public drinking water supplies. According to Paul Connett, Ph.D., director of [...]
Archive of posts filed under the Geochemistry category.
Aluminum Geochemistry Eh-pH, pe-pH diagrams and Solubility
The Eh-pH diagram for Aluminum in Al-O-OH system is constructed using Al activity as 1E-10. The Aluminum species can dissolve in water in both high and low pH as Aluminum can form complex ions with hydroxide ion (ano with other anions such as SO4). Eh–pH diagram is any of a class of diagrams that designates [...]
Eh-pH diagram for SILVER (Ag): Geochemistry
October 22, 2010 (Coal Geology) Silver (Ag) occurs naturally in its pure, free form (native silver), as an alloy with gold and other metals, and in minerals such as argentite and chlorargyrite. Most silver is produced as a by-product of copper, gold, lead, and zinc refining. The Eh-pH diagram shows the two main phase of [...]
ABA (Acid Base Accounting) Determining Organic, Pyritic and Sulfate sulfur
[ReviewAZON asin="B003YMN62U"]Role of oxygen transfer in acid mine drainage treatment[/ReviewAZON]
Chromium Geochemistry: Eh-pH diagram-Toxicity-Stability Diagrams
Chromium is highly insoluble in water. Chromium can only be in solution at a very low pH below 3.5. In this exercise we will generate Eh-pH diagrams to study stable and soluble phases. Cr(VI) is much more toxic and mobile than Cr(III). So, speciation of chromium is very important. Hexavalent chromium exists in alkaline, strongly [...]
