Iodomethane as a potential metal mobilizing agent in nature

Fumigant methyl iodide can methylate inorganic mercury species in natural waters

“…This would be particularly true in an environment where CH 3 I is used in large amounts as a fumigant. In addition to acting as a methylation agent, CH 3 I can also serve as a potential mobilizing agent for mercury sulfide (HgS) 12 . It has been demonstrated that CH 3 I could methylate sulphide into volatile (CH 3 ) 2 S and (CH 3 ) 2 S 2 , and then liberate free Hg 2 þ into water from insoluble HgS 12 .…”

“…As r was found to be positively related to the product of C Hg 2 þ and C CH3I (equation (13) , Fig. 4) and equation (14) could be obtained by combining equation (13) with equation (12). ) can be calculated by making the right side of equation (14) equal to zero (equation (15)).…”

“…The undetectable CH 3 Hg þ in the previous study could be attributed to the possible degradation of CH 3 Hg þ , which was not monitored during the experiment 11 . It is understandable that direct methylation of Hg 2 þ by CH 3 I has not been observed [12][13][14] , as this reaction is theoretically impossible according to the mechanism of the oxidative addition reaction. However, recent studies have indicated that a rapid conversion of Hg 2 þ to Hg 0 can occur in natural waters 15,16 , suggesting that Hg 2 þ could also play an important role in the CH 3 I-involved methylation of inorganic mercury in the environment.…”

Extent and rate of solubilization of tin by iodomethane-water mixtures

“…The same reactions were repeated, but in these cases samples were withdrawn and treated with sodium borohydide. The volatile hydrides produced, Me x SnH 4Àx (x = 0-4) were determined quantitatively by GC-AA analysis, 7 with the exception of Me 4 Sn, for which quantitative determination was not possible due to its volatility.…”

Solubilization of arsenic from gallium arsenide using aqueous suspensions of organic halides

“…', 2 Thayer et al demonstrated that it would react with anoxic sediments to release metals into the surrounding water. 3 It was presumed that, under such conditions, the metals were present as sulphides, and that release was caused by reactions such as that shown in Eqn [l].…”