Aqueous Environmental Geochemistry by Donald Langmuir

By Donald Langmuir

Langmuir offers an intensive presentation of typical chemical concentrations, platforms and strategies to assist readers (1) comprehend controls at the chemical caliber of floor and subsurface waters, and (2) distinguish among the average and the anthropogenic. in contrast to so much authors, whose civil/sanitary engineering backgrounds advertise a extra aquatic chemistry point of view, Langmuir?s geology/geochemistry event focuses insurance at the chemical interactions among water and geological fabrics. The booklet presents precious education in utilizing within the geochemical computing device code MINTEQA2 as an quintessential problem-solving device.

Show description

Read Online or Download Aqueous Environmental Geochemistry PDF

Similar geochemistry books

Cold Aqueous Planetary Geochemistry with FREZCHEM: From Modeling to the Search for Life at the Limits

This publication explicitly investigates problems with astrobiological relevance within the context of chilly aqueous planetary geochemistry. on the middle of the technical chapters is the FREZCHEM version, in the beginning built over decades via one of many authors to quantify aqueous electrolyte homes and chemical thermodynamics at subzero temperatures.

Environmental Applications of Geochemical Modeling

This publication discusses the applying of geochemical types to environmental perform and stories, by utilizing various case reviews of real-world environmental difficulties, resembling acid mine drainage, pit lake chemistry, nuclear waste disposal, and landfill leachates. In each one instance the authors basically outline the environmental hazard in query; clarify how geochemical modeling will help remedy the matter posed; and recommend the reader easy methods to arrange enter documents for geochemical modeling codes and interpret the consequences by way of assembly regulatory specifications.

Hydraulik für den Wasserbau

Die Technische Hydraulik stellt dem planenden Ingenieur die hydromechanischen Berechnungsverfahren zur Verfügung, die in Wasserbau, Wasserwirtschaft, Abwassertechnik und Wasserversorgung benötigt werden. Das Nachschlagewerk mit Formel- und Beispielsammlung für Strömungsfragen in Rohrleitungen und Gewässern zeigt in der neu bearbeitete Auflage wieder einen aktuellen Querschnitt durch das Gesamtgebiet; besonders hervorzuheben ist die einheitliche Behandlung des Sedimenttransports.

Groundwater Chemicals Desk Reference, 3rd Edition

The newest variation of the bestselling Groundwater chemical substances table Reference has been completely up-to-date and extended. as well as info about the environmental destiny and shipping in numerous media, natural precedence pollution and chemical substances more often than not present in the place of work and the surroundings, it comprises toxicity info for mammals and aquatic species in a transparent, constant layout.

Additional resources for Aqueous Environmental Geochemistry

Sample text

ZOKsp values are for the dissolution reaction written in the form: Si02 + 2H 20 ~ H4 SiO%. The Ksp function for chalcedony is from Nordstrom et al. (1990). The Ksp functions for quartz and amorphous silica are from Rimstidt and Barnes (1980). 21Nordstrom et al. (1990). The K value is Keq for the dissolution reaction written: Mg,Si z0 5(OH)4 + 6W =3Mg2+ + 2H4SiO~ + H20. 46 Thermochemical Principles Chap. 2 Equilibrium constants and enthalpies of selected reactions at 25°C and 1 bar pressure I Fluoride and Chloride Species Reaction H+ + P- = HFo W+2F-=HFi Na+ + F- = NaFo Ca2+ + F- = CaP Mg2+ + F- = MgP Mn 2++ P- == MnP Fe2++ F- = FeP Fe3+ + F- == FeF2+ Fe3++ 2F- = FeF!

Because it takes energy to break the bonds in most minerals (and in salts, generally) mineral dissolution is usually an endothermic process. In other words, most minerals (silicates, aluminosilicates, oxides, and sufides) increase in solubility (thus in their Ksp values) with increasing temperature (Fig. 7). This explains the relatively high concentrations of dissolved silica found in geothermal waters and why amorphous silica [Si0 2(am)] tends to precipitate, thus clogging heat exchangers when geothermal waters cool at the land surface.

4 cm 3/mol for Li+ and 36 cm3/mol for 1-, for example. Molar volumes of ions increase with increasing temperature. AV~ is negative for most ionization and dissolution reactions so that pressure generally increases the progress of ionization reactions and the solubility of minerals. Molar compressibilities for minerals range from 0 to -4 X 10-9 cm3lbar mol and can be assumed equal to zero up to about I kb pressure. Values for ions KO are generally in the range - 5 to -10 X 10-3 cm3lbar mol. AK~ for completely ionic reactions is small, but for dissolving minerals it may be large.

Download PDF sample

Rated 4.51 of 5 – based on 6 votes