title: Treatment of oilfield produced water using Fe/C micro-electrolysis assisted by zero-valent copper and zero-valent aluminium.
abstract: In this study, the Fe/Cu/C and Fe/Al/C inner micro-electrolysis systems were used to treat actual oilfield produced water to evaluate the feasibility of the technology. Effects of reaction time, pH value, the dosage of metals and activated carbon, and Fe:C mass ratio on the treatment efficiency of wastewater were studied. The results showed that the optimum conditions were reaction time 120 min, initial solution pH 4.0, Fe dosage 13.3 g/L, activated carbon dosage 6.7 g/L, Cu dosage 2.0 g/L or Al dosage 1.0 g/L. Under the optimum conditions, the removal efficiencies of chemical oxygen demand (COD) were 39.3%, 49.7% and 52.6% in the Fe/C, Fe/Cu/C and Fe/Al/C processes, respectively. Meanwhile, the ratio of five-day biochemical oxygen demand to COD was raised from 0.18 to above 0.35, which created favourable conditions for the subsequent biological treatment. All these led to an easy maintenance and low operational cost.
authors.affiliation: a School of Science , East China Jiaotong University , No. 808, Shuanggandong Road, Nanchang Economic and Technological Development Zone, Jiangxi Province, Nanchang 330013 , People's Republic of China.
authors.forename: Qi
authors.initials: Q
authors.lastname: Zhang
mesh_terms: D000535:Aluminum / Q000737:chemistry*; D003300:Copper / Q000737:chemistry*; D004572:Electrolysis / Q000379:methods*; D007220:Industrial Waste / Q000517:prevention & control; D061329:Oil and Gas Fields / Q000737:chemistry*; D014865:Waste Disposal, Fluid / Q000379:methods; D014874:Water Pollutants, Chemical / Q000737:chemistry / Q000302:isolation & purification*; D018508:Water Purification / Q000379:methods*
chemical_list: D007220:Industrial Waste; D014874:Water Pollutants, Chemical; D003300:Copper; D000535:Aluminum
keywords: Fenton reaction; TPH; biodegradability; micro-electrolysis; zero-valent aluminium