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Demethylation arsenate from

Demethylation refers to the removal of methyls from organoarsenicals, which may ultimately transform the organoarsenicals into inorganic arsenic. Although exposure to ultraviolet radiation may demethylate arsenic (Cullen and Reimer, 1989), 741, the role of microorganisms in demethylation is especially important. Under sterile conditions, MMA(V) and DMA(V) are very stable in water (Cullen and Reimer, 1989), 749. However, bacteria can demethylate them and other methylarsenic species into inorganic arsenic (Frankenberger and Arshad, 2002), 364 (Cullen and Reimer, 1989), 749 (Santosa et al., 1996), 703. [Pg.30]

Figure 8. Dissolved arsenate and monomethyl arsonic acid (MMAA) concentrations from demethylation of MMAA to arsenate, k = 0.04 day, Too asol = 7.7 mol g KasOji, = 32 mol L = 28 mol HK (a) arsenate (b) MMAA. Figure 8. Dissolved arsenate and monomethyl arsonic acid (MMAA) concentrations from demethylation of MMAA to arsenate, k = 0.04 day, Too asol = 7.7 mol g KasOji, = 32 mol L = 28 mol HK (a) arsenate (b) MMAA.
Demethylation of sodium methylarsonate to arsenate was reported by Shariatpanahi and coworkers. One organism isolated from soil, Alcaligenes, produces only arsenate ... [Pg.735]

See other pages where Demethylation arsenate from is mentioned: [Pg.136]    [Pg.172]    [Pg.729]    [Pg.365]    [Pg.1484]    [Pg.1484]    [Pg.172]    [Pg.331]    [Pg.30]    [Pg.392]    [Pg.714]    [Pg.293]    [Pg.172]    [Pg.364]    [Pg.23]   
See also in sourсe #XX -- [ Pg.729 ]



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