Treatment of dairy wastewater by electrocoagulation using A-U4G (2017-Al) alloy and pure aluminum as electrode material

Abstract

The electrocoagulation (EC) process is an efficient and low-cost system for the purification of wastewater.The aim of this work was to investigate the efficiency of two types of aluminum (Al) electrodes (Al alloy and pure Al electrodes) for the treatment of synthetic semi-skimmed milk wastewater. Turbidity, chemical oxygen demand (COD), and concentration of Al species were monitored during the experiments. The effect of various parameters, such as current density and type and nature of the electrode were examined. The results showed that Al alloy electrodes exhibited a higher efficiency than pure Al electrodes. A quasi-total reduction of turbidity and a removal of approximately 58% of the COD were achieved within 24 min at pH 7 and a current density of 14.3 mA.cm −2 . It was also observed that the removal performance was not affected by the state of the electrode surfaces (polished) under the same operating conditions.

Removal of Pharmaceuticals from Water by Adsorption and Advanced Oxidation Processes: State of the Art and Trends

“…Electrocoagulation is a treatment process in which cations are formed by metal electrodes in an electrical field [68,69]. It produces coagulants using metal electrodes that are more likely to encounter pharmaceutical products with several advantages, including sludge minimization, automatic treatment, and efficient and low operating costs [69,70].…”

“…Electrocoagulation is a treatment process in which cations are formed by metal electrodes in an electrical field [68,69]. It produces coagulants using metal electrodes that are more likely to encounter pharmaceutical products with several advantages, including sludge minimization, automatic treatment, and efficient and low operating costs [69,70]. The removal efficiency of the three most consumed pharmaceutical products such as carbamezapine (70%), diclofenac (90%), and amoxicillin (77%) was investigated by Ensano et al [71] for a density of 0.5 mA/cm 2 , an initial concentration of 10 mg/L, and a hydraulic retention time HRT of 38 h. Oxytetracycline, an antibiotic drug, was analyzed by Nariyan et al [72].…”

Treatment by Electrocoagulation of Congo red from Aqueous Solution Using Cantor Alloy

“…An inspection of the literature shows various alloy electrodes were used in wastewater treatment with EC (Donneys-Victoria et al, 2020;Molano-Mendoza et al, 2019;Dura, 2013b). They pointed out that conventionally alloys provide a more efficient wastewater treatment compared to pure metals (Aitbara et al, 2021). Therefore, the alloys containing more than one element possess better removal efficiency compared to their pure counterparts.…”

Synthesis of Manganese Ferrite/Graphene Oxide Magnetic Nanocomposite for Pollutants Removal from Water

“…The direct discarding of such harmful industrial pollutants without treatment is a significant concern [4]. Thus, many techniques are developed for the treatment of water/wastewater from toxic species, such as adsorption [5], co-precipitation [6], electrocoagulation [7], biochemical degradation [8], photocatalytic degradation [9], photo-degradation [10], oxidative degradation [11], and electrochemical degradations [12]. However, several reasons make the adsorption technique widely used for water treatment over other techniques, such as eliminating several types of toxins, high efficiency, less environmental effect, the ability to reuse adsorbents, and the ease of processing [13][14][15].…”