【摘要】 从动力学角度研究空气氧化Fe²⁺离子的化学反应机理,主要探究溶液矿化度、pH和曝气方式对Fe²⁺氧化速率的影响,在40℃实验温度下建立动力学模型.实验表明,pH对处理含铁污水有重要作用.并通过模拟高含铁(c(Fe²⁺)≥100 mg/L)和含铁含HCO■两种常见油田酸性污水并做处理研究,得到处理含铁污水的可行方法.处理结果表明,对于高含铁污水可通过加碱方法改性,pH提高到9时Fe²⁺含量接近0;含铁含HCO■污水可通过定量曝气比V_G/L方法将pH提高到预期范围,并利用溶解氧延迟氧化Fe²⁺,该氧化模式为二级动力学反应.更多还原

【Abstract】 Studying on the chemical reaction mechanism of air oxidating Fe²⁺from perspective of kinetics, we explored effect of salinity, pH and ways of aeration on oxidation rate of Fe²⁺, and established kinetics model at 40 ℃. The results show that pH plays an important role in treating sewage containing Fe²⁺. Rreasonable methods of eliminating Fe²⁺ in sewage have been obtained by simulating and treating the sewage containing Fe²⁺(c(Fe²⁺)≥100 mg/L) and the other containing HCO■ and Fe²⁺. The sewage with 100 mg/L Fe²⁺ or more can be treated by adding alkali to improve pH to 9.0 with close to 0 content of Fe²⁺; the sewage containing HCO■ and Fe²⁺ can be treated by increasing pH to expected range with choosing rational V_G/L, and Fe²⁺ can be eliminated by oxidation of dissolved oxygen（DO）, which belongs to secondary kinetic reaction.更多还原