By J. Rae, A. Parker (auth.), Dr. Andrew Parker, Dr. Joy E. Rae (eds.)
Environmental Interactions of Clays is the spouse quantity of Bruce Velde's ebook on Origin and Mineralogy of Clays. In facing the function of clays in particular environmental concerns, it truly is detailed in its material.
Individual chapters are written via famous foreign specialists of their box. matters coated are radioactive waste disposal, hint metals, soil caliber and productiveness, insecticides, landfill, fibrous minerals and health.
The method is one among combining overview with present study, therefore it truly is a useful source for college kids, researchers and practitioners alike.
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Additional info for Environmental Interactions of Clays: Clays and the Environment
The minerals in the fraction 2 micrometers (pm) and less in equivalent spherical diameter. Soils are used for many purposes, e. g. for the growth of plants, for the support of buildings, roads and airports, and for the containment of lakes. Thus, they require many varied properties to serve the purposes to which they are applied. 2 Color The color of soil is largely caused by the presence of certain minerals (Schwertmann and Taylor 1989; Bigham and Ciolkosz 1993). The Fe oxide haematite gives the soil a red color.
Vermiculite and zeolite minerals have very high negative charge and occur most often in coarse clay and silt fractions. Vermiculite is recognized for its selective retention of certain large cations and its limited shrink-swell range (see later). Zeolite particles are highly charged and have ion selectivity controlled by the size of tunnels in their structures that restrict the passage of ions and molecules (Ming and Mumpton 1989). 5 Shrinking and Swelling of Soils Many soils, particularly those that contain abundant clay, shrink and form visible cracks as they dry.
B. 1993) 100nm Fig. 6. a Iron oxide-coated rice root and secondary root; b an Fe oxide cast of a cell in place with smooth exterior and rough interior surfaces. (Chen et al. 1980) 1993). These Fe oxide coatings bind soil particles together improving soil aggregation in a restorative process that occurs after the paddy is drained. These reactive Fe oxides were found to contain P and Si (Golden et aI. 1988). The precipitation of orange-colored lepidocrocite iron oxide on the roots of rice plants illustrates a reaction widely viewed as a protective mechanism against Fe toxicity to the plant (Fig.