Mercury

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