Simultaneous removal of cadmium, zinc and manganese using electrocoagulation: Influence of operating parameters and electrolyte nature

Xu, Longqian; Cao, Guangzhu; Xu, Xiaojun; Liu, Shuli; Duan, Zhengyang; He, Changhua; Wang, Yao; Huang, Qihua

doi:10.1016/j.jenvman.2017.09.020

Cited by 68 publications

(17 citation statements)

References 37 publications

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“…previously, these were limited to electrocoagulation. [19][20][21] Although effective for conventional applications, these treatment options can be impractical and uneconomic for small, remote and decentralised treatment systems, as they all require the constant supply of process chemicals. The use of electro-oxidation for manganese removal may present a more favourable option that eliminates the chemical supply requirement associated with the conventional treatment processes.…”

Section: Introductionmentioning

confidence: 99%

Advanced electrochemical oxidation for the simultaneous removal of manganese and generation of permanganate oxidant

McBeath

Wilkinson

Graham

2020

Environ. Sci.: Water Res. Technol.

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Section: Introductionmentioning

confidence: 99%

Advanced electrochemical oxidation for the simultaneous removal of manganese and generation of permanganate oxidant

McBeath

Wilkinson

Graham

2020

Environ. Sci.: Water Res. Technol.

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“…Current density is one of the most important operating parameters that affect the efficiency of the EC process (Kobya et Demirbas 2015;Xu et al 2017).It can determine the hydroxide formation, the rate and the size of the bubbles produced at the electrodes, the mixing rate within EC and other redox processes (Aitbara et al 2016;Aitbara et al 2017;Bayar et al 2011;Nasrullah et al 2019). Holt et al (2002) have reported that aluminum species are produced rapidly at high current densities, compared to coagulation system.…”

Section: Effect Of the Current Density On The Ec Processmentioning

confidence: 99%

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

Aitbara

Khelalfa

Bendaia

et al. 2021

Euro-Mediterr J Environ Integr

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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.

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“…Adding electrolytes to increase conductivity results in a reduction in the ohmic resistance of the solution. As a result of the reduced resistance between the electrodes, electrical energy consumption can be reduced (Xu et al, 2017). In this experiment, the effect of electrolyte type and concentration on the flocculation effects of the solution was studied.…”

Section: Effect Of Electrolyte On Decolorization Ratementioning

confidence: 99%

Construction of novel electrochemical treatment systems for indigo wastewater and their performance

Huangfu

Zhang

Shang

et al. 2020

PRT

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Purpose This study aims to evaluate the efficiency of metal electrode and electrolytes on the electroflocculation of indigo wastewater, produced by printing and dyeing factory, and to optimize the treatment system. Design/methodology/approach For effective purging, various types of metal electrodes (graphite, pure aluminum and stainless steel) and supporting electrolytes (sodium chloride and sodium sulfate) were selected for electroflocculation experiments. The decolorization rate and chemical oxygen demand (COD) removal rate were characterized. Findings The treatment effects of stainless steel and aluminum were similar, but the dissolution loss of aluminum and the production of flocs greatly limit its application. Electrolytes gave obvious effects to these systems. Sodium sulfate was better than sodium chloride, the decolorization rate was increased by 3.31%, the removal rate of COD in the solution was increased by 28.65% and the weight of flocculation precipitation was reduced by 0.214 g. Research limitations/implications The electrochemical treatment system was constructed to compare and analyze the influence of experimental parameters and to provide a reference for the actual treatment of indigo wastewater. Practical implications Electrochemical flocculation can remove the insoluble indigo solids and it plays a key role in wastewater treatment. Originality/value It is novel to optimize the combination of electrode and electrolyte to improve the efficiency of electroflocculation, which can be widely used in the actual wastewater treatment process.

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Simultaneous removal of cadmium, zinc and manganese using electrocoagulation: Influence of operating parameters and electrolyte nature

Cited by 68 publications

References 37 publications

Advanced electrochemical oxidation for the simultaneous removal of manganese and generation of permanganate oxidant

Advanced electrochemical oxidation for the simultaneous removal of manganese and generation of permanganate oxidant

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

Construction of novel electrochemical treatment systems for indigo wastewater and their performance

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