Mercury
Mercury
Mercury
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The effect of the structure of<br />
surface active agent on bio-degradation<br />
1) Cationic surfactant<br />
The bio-degradation of cationic surfactant requires<br />
aerobic conditions. The order of the ability of being biodegraded<br />
of three types of alkylbenzene sulfonates (ABS)<br />
with different structures of hydrophobic groups is as follows:<br />
Linear ABS (LAS)>ABS substituted by a branch-chain at the<br />
end of the group>trimethy ABS<br />
As for those cationic surfactants difficult being degraded, we<br />
can prepare them together with other types of surface active<br />
agents in order to raise its bio-degradation. e.g. trimethyl<br />
dodecyl ammonium chloride ( 三 甲 基 十 二 烷 基 氯 化 铵 )<br />
couldnot be degraded even in 27h while it can be easily<br />
degraded once being mixed with LAS at the radio of 1:1.