Programa de Pós-graduação em Energia, Universidade Federal do Espírito Santo, Rodovia BR 101 Norte, km. 60, Bairro Litorâneo, CEP 29932-540, São Mateus, ES, Brazil.
Universidade Federal do Espírito Santo, Departamento de Engenharias e Tecnologia, Rodovia BR 101 Norte, km 60, Bairro Litorâneo, CEP 29932-540, São Mateus, ES, Brazil.
J Environ Manage. 2018 May 1;213:119-125. doi: 10.1016/j.jenvman.2018.01.069. Epub 2018 Feb 23.
An electrocoagulation technique using a 3.5 L reactor, with aluminum electrodes in a monopolar arrangement with polarity switch at each 10 s was used to separate oil from synthetic oily water similar in oil concentration to produced water from offshore platforms. Up to 98% of oil removal was achieved after 20 min of processing. Processing time dependence of the oil removal and pH was measured and successfully adjusted to exponential models, indicating a pseudo first order behavior. Statistical analysis was used to prove that electrical conductivity and total solids depend significantly on the concentration of electrolyte (NaCl) in the medium. Oil removal depends mostly on the distance between the electrodes but is proportional to electrolyte concentration when initial pH is 8. Electrocoagulation with polarity switch maximizes the lifetime of the electrodes. The process reduced oil concentration to a value below that stipulated by law, proving it can be an efficient technology to minimize the offshore drilling impact in the environment.
采用 3.5L 反应器，使用单极布置的铝电极，每隔 10s 进行极性切换的电凝聚技术，用于分离类似于海上平台采出水的含油浓度的合成含油污水。处理 20min 后，可去除 98%的油。测量了除油率和 pH 值随处理时间的变化关系，并成功地将其调整为指数模型，表明具有伪一级反应行为。统计分析用于证明电导率和总固体取决于介质中电解质（NaCl）的浓度有显著影响。除油率主要取决于电极之间的距离，但当初始 pH 值为 8 时，与电解质浓度成正比。带极性切换的电凝聚可最大程度地延长电极的使用寿命。该工艺将油浓度降低到低于法律规定的水平，证明它可以成为一种有效的技术，以最大限度地减少海上钻井对环境的影响。
