Mercury
Mercury
Mercury
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The methylation process of<br />
mercury inside the organizm<br />
1) Main products: aerobic, CH 3 Hg + ; anaerobic, (CH 3 ) 2 Hg<br />
2) CH 3 Hg+: water-soluble, taken by organizm and enter the<br />
food-chain<br />
(CH 3 ) 2 Hg : water-insoluble, volatile, photolytic<br />
3) Formation speed: methyl mercury>dimethyl mercury<br />
4) reciprocal transformation:<br />
CH 3 Hg +<br />
H 2 S<br />
pH4-5<br />
(CH 3 ) 2 Hg<br />
6,000 times<br />
5) peccant materiel( 致 病 性 物 质 )of minamata disease:<br />
methyl mercury, dimethyl mercury, propyl mercury<br />
6) Accumulation: With high fat-solubility, mercury alkyl is<br />
more easier to be concentrated than non-alkyl mercury<br />
and is difficult to degrade.
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