Aqueous Environmental Geochemistry by Donald Langmuir

By Donald Langmuir

Langmuir presents an intensive presentation of usual chemical concentrations, structures and approaches to assist readers (1) comprehend controls at the chemical caliber of floor and subsurface waters, and (2) distinguish among the normal and the anthropogenic. in contrast to so much authors, whose civil/sanitary engineering backgrounds advertise a extra aquatic chemistry standpoint, Langmuir?s geology/geochemistry adventure focuses insurance at the chemical interactions among water and geological fabrics. The booklet offers beneficial education in utilizing within the geochemical computing device code MINTEQA2 as an critical problem-solving instrument.

Show description

Read Online or Download Aqueous Environmental Geochemistry PDF

Best geochemistry books

Essentials of medical geology : impacts of the natural environment on public health

This authoritative reference quantity emphasizes the significance and interrelationships of geological methods to the overall healthiness and ailments of people and animals. Its available layout fosters larger verbal exchange among the health and wellbeing and geoscience groups through elucidating the geologic origins and move of poisonous components within the surroundings that result in human publicity during the intake of nutrition and water.

Medical Geochemistry: Geological Materials and Health

This booklet contains a selection of chapters illustrating the appliance of geochemical the right way to examine the interactions among geological fabrics and fluids with people. Examples contain the incorporation and human health and wellbeing results of breathing in lithogenic fabrics, the reactivity of organic fluids with geological fabrics, and the influence on nascent biomineral formation.

Trace Elements in Abiotic and Biotic Environments

Hint parts in Abiotic and Biotic Environments is helping readers comprehend the elemental rules and phenomena that keep watch over the move of hint components. This booklet describes the incidence and behaviour of hint components in rocks, soil, water, air, and vegetation, and likewise discusses the anthropogenic impression to the surroundings.

Water Quality: An Introduction

The revised moment version updates and expands the dialogue, and comprises extra figures and illustrative difficulties. advancements comprise a brand new bankruptcy on simple chemistry, a extra accomplished bankruptcy on hydrology, and an up-to-date bankruptcy on rules and criteria. This publication provides the elemental facets of water caliber, emphasizing actual, chemical, and organic components.

Additional info for Aqueous Environmental Geochemistry

Sample text

In other words, the dissolution of gases in water is exothermic. 9 kcallmol for 02(g) = 0iaq). 03 mg/L at 0, 25, and 35°C (Manahan 1991). c: ::: ~ L Aragonite 0 eo ,S2 -9 -4 Anhydrite (metastable) ~ ......... I __ ! 2. 5 Sec. 6 Effect of Changes in T and P on the Equilibrium Constant 27 Inspection of the van't Hoff equation shows that the effect of a temperature change on Keq is proportional to the magnitude of the enthalpy of the reaction. fI rO, the stronger the temperature dependence of Keq.

C) Does the reaction produce heat or consume it? 5. Thermodynamic data that may be useful in solving this problem are tabulated below. Values are for 25°C and I bar pressure. 2 (a) Write the reaction that represents the formation of calcite (CaCO]) from the elements in their most stabh: states at 2YC and 1 bar pressure, and compute ~S,O for the reaction. (b) How are MI} and ~G} for calcite related to ~H,o and ~G,? for this reaction? 48. (d) Calculate MI}(calcite) from the entropy and free energy of formation data determined above.

FI: values become increasingly negative, and the undissociated acid species become more and more important. Most solution reactions that lead to the formation of aqueous inorganic complexes are endothermic, thus the complexes increase in stability with increasing temperature (see Fig. 6). This applies to the formation of most metal complexes with sulfate, fluoride, bicarbonate, carbonate, and phosphate ions (cf. Christensen et al. 1975; Smith and Martell 1976; Nordstrom et al. 1990). In other words the hotter the water is, the more the metal species in it will be present as complexes with these ligands rather than as free ions.

Download PDF sample

Rated 4.70 of 5 – based on 22 votes