Abdelhay Arwa, Jum'h Inshad, Abdulhay Enas, Al-Kazwini Akeel, Alzubi Mashael
Department of Water and Environmental Engineering, School of Natural Resources Engineering and Management, German Jordanian University, Amman, Jordan E-mail:
School of Basic Sciences and Humanities, Department of Physics, German Jordanian University, Amman, Jordan.
Water Sci Technol. 2017 Dec;76(11-12):3227-3235. doi: 10.2166/wst.2017.488.
A non-sacrificial boron-doped diamond electrode was prepared in the laboratory and used as a novel anode for electrochemical oxidation of poultry slaughterhouse wastewater. This wastewater poses environmental threats as it is characterized by a high content of recalcitrant organics. The influence of several process variables, applied current density, initial pH, supporting electrolyte nature, and concentration of electrocoagulant, on chemical oxygen demand (COD) removal, color removal, and turbidity removal was investigated. Results showed that raising the applied current density to 3.83 mA/cm has a positive effect on COD removal, color removal, and turbidity removal. These parameters increased to 100%, 90%, and 80% respectively. A low pH of 5 favored oxidants generation and consequently increased the COD removal percentage to reach 100%. Complete removal of COD had occurred in the presence of NaCl (1%) as supporting electrolyte. NaSO demonstrated lower efficiency than NaCl in terms of COD removal. The COD decay kinetics follows the pseudo-first-order reaction. The simultaneous use of NaSO and FeCl decreased the turbidity in wastewater by 98% due to electrocoagulation.
在实验室制备了一种非牺牲性掺硼金刚石电极，并将其用作电化学氧化家禽屠宰场废水的新型阳极。这种废水由于含有高含量的难降解有机物而对环境构成威胁。研究了几个工艺变量，即施加电流密度、初始pH值、支持电解质性质和电凝聚剂浓度，对化学需氧量（COD）去除、脱色和浊度去除的影响。结果表明，将施加电流密度提高到3.83 mA/cm²对COD去除、脱色和浊度去除有积极影响。这些参数分别提高到100%、90%和80%。pH值为5的低pH有利于氧化剂的生成，因此将COD去除率提高到100%。在存在1% NaCl作为支持电解质的情况下，COD完全去除。就COD去除而言，Na₂SO₄的效率低于NaCl。COD衰减动力学遵循准一级反应。由于电凝聚作用，同时使用Na₂SO₄和FeCl₃可使废水中的浊度降低98%。
