However, based on the principle of Langmuir Hinshelwood, the authors proposed that there existed two kinds of active cites on the carbon surface, of which H 2SO 4 and O 2 occupied one sort and SO 2, H 2O and H 2SO 3 another.

• 根据Langmuir－Hinshelwood原理得出活性炭表面存在两类不同的活性中心，其中H2SO4和O2占据一类活性中心； SO2、H2O和H2SO3占据另一类活性中心。