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Sequential Microbial and Chemical Reactions

Microbial activity may produce reactive intermediates that undergo spontaneous chemical transformation to terminal metabolites. This is quite a frequent occurrence, and its diversity is illustrated by the following examples  [Pg.55]

The transformation of aromatic amino acids to the 2-ketoacids was mediated by morganii, and these subsequently underwent a hemin-dependent chemical transformation with the production of CO (Hino and Tauchi 1987). [Pg.55]

Tetrachloroethene may be degraded by bacteria via the epoxide, and chemical hydrolysis of this produces CO and CO2 from oxalyl chloride as major products, whereas only low amounts of trichloroacetate were produced (Yoshioka et al. 2002). [Pg.55]

Nitrite (or compounds at the same or lower oxidation level) is produced microbiologically from nitrate, and may then react with the substrate to produce stable end products. The production of nitrite is the sole metabolic function of the bacteria and, in view of concern over the presence of nitrate in groundwater, the following possible environmental significance of these or analogous reactions should not be overlooked  [Pg.55]

FIGURE 2.2 Transformation of (a) 5-aminonaphthalene-2-sulfonate, (b) benzo[fc]thiophene, (c) 4-chloro-biphenyl, (d) 4-nitrotoluene, (e) 3,5-dichlor-4-methoxybenzyl alcohol, (f) 2,3-diaminonaphthalene in presence of nitrate, and (g) 3,4-dichloroaniline presence of nitrate. [Pg.56]


A valuable review (Hamby 1996) has been given that summarizes chemical and physical treatments of soils, and contaminated ground and surface waters. Some procedures for chemical destruction of selected xenobiotics have been given in Chapter 4, Section 4.1.1 and 4.1.3, comments on sequential microbial and chemical reactions in Chapter 4, Section 4.2.3, and an example of combined biological and chemical remediation is given in Section 8.2.1. [Pg.788]


See other pages where Sequential Microbial and Chemical Reactions is mentioned: [Pg.55]    [Pg.9]    [Pg.256]   


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