化学需氧量
电凝
电流密度
电解质
响应面法
支撑电解质
废水
化学
阳极
恒流
反应速率常数
制浆造纸工业
电流(流体)
分析化学(期刊)
核化学
色谱法
电极
动力学
环境工程
环境科学
热力学
物理化学
工程类
物理
量子力学
作者
Rasha H. Salman,Ali H. Abbar
标识
DOI:10.1016/j.cep.2022.109227
摘要
The performance of a synergistic combination of electrocoagulation (EC) and electro-oxidation (EO) for oilfield wastewater treatment has been studied. The effect of operative variables such as current density, pH, and electrolyte concentration on the reduction of chemical oxygen demand (COD) was studied and optimized based on Response Surface Methodology (RSM). The results showed that the current density had the highest impact on the COD removal with a contribution of 64.07% while pH, NaCl addition and other interactions affects account for only 34.67%. The optimized operating parameters were a current density of 26.77 mA/cm2 and a pH of 7.6 with no addition of NaCl which results in a COD removal efficiency of 93.43% and a specific energy consumption of 128.6 kWh/kg COD. The most new findings of this research was that currents provided for the two anodes (Al and Graphite having the same surface area) were not equal between them and the current ratio (IAl/IGr) depends on the intensity of current, pH, and addition of NaCl. Besides, higher removal of COD occurs at a lower value of (IAl/IGr). The COD removal reaction was found to be pursued a second-order kinetic with a reaction rate constant (k) of 7.5847 × 10−5 (mg/L)−1/min.
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