硫循环的酶促反应机制及湖泊环境效应

在湖泊沉积物表层存在着强烈的生物作用 ,使SO2 -4 转变成S2 -,然后和Fe2 + 结合而固定在沉积物中 ,这种SO2 -4 的清除机制具有重要的环境意义。本文论述了H2 S的产生和各种形态硫转变成SO2 -4 的酶促反应机制 ,并阐述了不同微生物电子传递载体、最终电子受体和电子进入传递链的部位的差异以及生成ATP的数目和环境效应的差异。

ENZYMIC MECHANISM OF SULFUR CYCLING AND LAKE ENVIRONMENTAL EFFECTS

There is a strong biological process at the surface of lake sediments. It makes SO {2-}-4 turn into S {2-}, then combine with solid Fe {2 } in the sediments. The sequestering mechanism has important environmental effects. The paper explains the enzymatic mechanism of sulfide production and varieties of sulfur species turning into SO {2-}-4 and differences in electron transfer carrier, final electron receptor, electron|entering sites, number of ATP and environmental effects.;