By Antonio Violante, Pan Ming Huang, Geoffrey M. Gadd
Written through a multidisciplinary crew of soil and environmental scientists, Biophysico-Chemical tactics of Heavy Metals and Metalloids in Soil Environments offers the clinical neighborhood with a serious qualitative and quantitative evaluation of the basics of the strategies of pollution in soil environments. The publication covers toxins' speciation, mobility, bioavailability and toxicity, and affects on improvement of leading edge recovery concepts. additionally, the advance of cutting edge remediation concepts for polluted soils is roofed.
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Extra info for Biophysico-Chemical Processes of Heavy Metals and Metalloids in Soil Environments (Wiley Series Sponsored by IUPAC in Biophysico-Chemical Processes in Environmental Systems)
Microorganisms can help dissolve, precipitate, complex, oxidize, or reduce metals and metalloids and can initiate the formation of Þne-grained minerals, including nanoparticles. Natural particles suspended in the air can be transported to regions far from their sources. This is important for transporting many metals and metalloids in the ecosystem. A few metals and metalloids, most notably Hg, As, and Se, can exist not only in the solid and liquid phases but also as gases in ambient environments.
1994; Ehrlich, 2002). Volatilization of metals and metalloids or biomethylated metals and metalloid compounds from the soil into the atmosphere can be a mechanism of detoxiÞcation of toxic elements such as Hg, As, and Se for microorganisms (Gadd, 1993). 8. MICROBIAL SORPTION AND UPTAKE OF METALS AND METALLOIDS All microorganisms contain biopolymers such as proteins, nucleic acids, and polysaccharides, which provide reactive sites for binding metal ions (Hughes and Poole, 1989). These binding sites include negatively charged groups such as carboxylate, thiolate, and phosphate, and groups such as amines, which coordinate to the metal center through lone pairs of electrons.
1991, 1995). 3. 9 Source: Krishnamurti and Huang (1990). 01 mol L−1 ferrous perchlorate in the absence and presence of organic complexing ligands. 01 and at 25◦ C. 5◦ C. 5. SORPTION–DESORPTION REACTIONS OF METALS AND METALLOIDS Metals and metalloids undergo a series of reactions involving both the aqueous and solid phases, which vary in space and time. Sorption may be considered as a major process controlling the partitioning of metals and metalloids between the aqueous and solid phases in soils.