Mercury
Mercury
Mercury
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2) Anionic surfactant<br />
• Anionic surfactants such as LAS and AES ( 脂 肪 醇 醚 硫<br />
酸 盐 ) constitute a large portion of surface active agents<br />
contained in detergents.<br />
• LAS degrades the most quickly in all the detergents,<br />
which can be hydrolysed by sulfatase to sulfates and<br />
some related fatty alchohol ( 脂 肪 醇 ) and finally further<br />
oxidized to CO2 和 H2O.<br />
• As for LAS, the degradation speed grows with the<br />
farther distance between the sulfo ( 磺 基 ) and the end of<br />
the methyl chian and it degrades the most quickly with<br />
the number of carbon atoms of the methyl between<br />
6~12. The effect of branch-chain is similar to that of<br />
nonionic surfactants.