草炭土修复地下水石油类污染物过程中水化学因子的变化规律

Variation Law of Hydro-chemical Factor during Repair Process of Peat Soil for Petroleum Hydrocarbons in Groundwater

主要研究草炭土在修复地下水石油烃过程中水化学因子的变化规律，实验选取Fe3＋、Mn2＋、SO4^2-、Ca2、Mg2＋、NH4＋、HPO4^2-、NO3-离子进行相关研究，实验结果表明草炭土对于水化学因子有一定的改变作用，对Ca2’的去除率稍低在58．77％～66．50％之间，Mn2＋、NH＋、Mg2＋、NO3-的去除率均大于80％，而SO4^2-、Fe3＋、HPO4^2-几乎被全部去除，去除率均大于97％。SO4^2-、NH4＋、NO3-对草炭土吸附石油烃具有促进作用，Ca2＋对草炭土吸附石油烃具有抑制作用，较低浓度的HPO4^2-不利于草炭土去除石油烃，Fe3＋、Mn2＋、Mg2＋对草炭土吸附石油烃影响不明显，8种离子对草炭土吸附石油烃的影响随浓度改变。

This paper mainly studies the variation law of hydro-chemical factors during repair process of the peat soil for petroleum hydrocarbons in groundwater. In the experiments, the elements of Fe3＋、Mn2＋、SO4^2-、Ca2、Mg2＋、NH4＋、HPO4^2-、 , and NO3- are chosen to conduct the research. The results show that the peat soil has a certain effect on the changes of water chemical faetors; the removal rate of Ca2＋ is between 58. 77% to 66. 50%, that of Mn2＋ , NH4＋ ,Mg2＋ , NO3- is greater than 80%, while Fe3＋ , SO4^2-, HPO4^2- are almost completely removed and the removal rates are more than 97%. The SO4^2- ,NH＋ , and NO2 have promotion effect on the adsorption of the peat soil for petroleum hydrocarbons, while Ca2＋ has the inhibition effect on the adsorption of the peat soil for petroleum hydroearbons; HPO4^2- with lower concentration is not conducive for the removal of petroleum hydrocarbons, the Mn2＋ , Mg2＋ have no significant effects on it. The effects of the eight kinds of ions on the adsorption of the peat soil for petroleum hydrocarbons change with the concentration.