Aquatic chemistry: interfacial and interspecies processes by Chin Pao Huang, Charles R. O'Melia, James J. Morgan

By Chin Pao Huang, Charles R. O'Melia, James J. Morgan

Presents entire experimental and theoretical analyses of chemical reactions in multiphase, multispecies platforms. Explores the rules and purposes of floor chemistry, soil chemistry, microbiology, geochemistry, redox response, and colloid chemistry to environmental platforms. Examines the impression of abiotic and biotic interfaces on chemical reactions in aquatic setting structures. contains chapters via Werner Stumm, the founding father of aquatic chemistry.

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Sci. 1985, 285, 963-993. 41. Brady, P. ; Walther, J. Y. Geochim. Cosmochim. Acta 1989,53, 2823-2830. 42. Stumm, W; Wollast, R. Rev. Geophys. 1990, 28/1, 53-69. 43. Wollast, R. ; Wiley & Sons: New York, 1990; pp 431-445. 44. Stumm, W; Sulzberger, B. Geochim. Cosmochim. Acta 1992, 56, 3233. 45. ; Stumm, W Environ. Sci. Technol. 1994, 28, 763. 46. Blesa, M. ; Marinovich, H. ; Baumgartner, E. ; Maroto, A. J. G. Inorg. Chem. 1987,26, 3713--3717. 32 AQUATIC CHEMISTRY 47. ; Grtzel, M. Langmuir 1991, 7, 3012.

Naturally occurring oxoanions like S042- and H 2P0 4- at concentrations representative of those encountered in natural waters can inhibit dissolution and weathering reactions. A very low concentration of inhibitors can often be effective, because it may suffice to block the functional groups of solutionactive sites (such as the kink sites). The effect of specifically adsorbable cations on the reduction of dissolution (weathering) rates of minerals is important. A case was documented by Grandstaff (32), who showed that thorium, Pb(II) , 1.

Both may form binuclear surface complexes. Reductants. Reductants can break down passive oxide films because favor reductive dissolution and lower the electrode potential. Naturally (:cUfring organic substances, including fulvic and humic acids and phenols, : ~n reduce Fe(lII) (hydr)oxides. EspeCially detrimental are H 2S and S(-II) f1mpounds. S(-II) has a strong affinity to Fe(II1) (Figure 3) (55). :~ey Inorganic Oxoanions. Oxoanions like phosphate, silicates, borate, mo-. :xiate, vanadate, arsenate, wolframate, and pertechnate are efficient inhibi::-5.

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