Arsenite removal from groundwater by aerated electrocoagulation reactor with Al ball electrodes: Human health risk assessment

Gören, Ayşegül Yağmur; Kobya, Mehmet; Öncel, Mehmet Salim

doi:10.1016/j.chemosphere.2020.126363

Cited by 38 publications

(11 citation statements)

References 44 publications

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“…While for NH₃-N, the percentage of removal was 8.11%, 11.2%, 32.78% and 40.66%, respectively. The results obtained were compared with the AEC experiment conducted by [10], and from the study, the removal NH₃-N was only 24% at a current density of 631 A/m² at pH 9.6. In another study that conducted an EC experiment with no aeration, the results showed that the removal efficiency of NH₃-N was 36% at the duration of 120 minutes which was slightly lower than the EC process with the presence of air [17].…”

Section: Optimum Range For Current Densitymentioning

confidence: 96%

“…The presence of aeration in the EC experiment would increase the production of hydrogen ions inside the liquid, leading to the increase of pH during the aeration process [3]. [10] also conducted a study about the treatment of leachate by using AEC. Based on the studies, when the aeration rate is 1.0 L/min with a constant pH of 9.6, the percentage removal of NH₃-N was 24% in the duration of 30 minutes.…”

Section: Expected Optimum Range For Phmentioning

confidence: 99%

“…Some researchers find that the removal of NH₃-N and colour are high when the current density increases [4]. According to [10], the value of pH plays a significant role in the removal process. The effect of initial pH on the efficiency of EC has been investigated in several studies [3].…”

Section: Introductionmentioning

confidence: 99%

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Study on Ammonia and Colour Removal from Leachate via Aerated Electrocoagulation (Ferum and Aluminium Electrode)

Anuar

Zin

Zailani

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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Untreated landfill leachate is harmful to the groundwater resources, environment, and human health. Therefore, proper treatment is needed. This study investigates the efficiency of the aerated electrocoagulation (AEC) method in removing ammonia (NH3-N) and colour in leachate under the influence of current density and to review the data from previous research on the removal of NH3-N and colour in AEC under the influence of pH and aeration rate. In this research, leachate samples from Simpang Renggam Landfill are used, and characterisation for biochemical oxygen demand (BOD), chemical oxygen demand (COD), pH, suspended solids (SS), colour, and NH3-N had been conducted. Ferum and aluminium electrodes with a dimension of 200 mm × 50 mm × 1 mm are used in this experiment. From the data obtained, the optimum current density for the removal of NH3-N and colour using AEC was at 200 A/m² with the percentage of removal 40.66% and 85.91%, respectively. For optimum pH and optimum aeration rate, the data was reviewed from the previous studies, and the maximum efficiency of NH3-N and colour removal from stabilised leached occurred at optimum conditions of pH 7 to 8 and 0.5 L/min-1.5 L/min aeration rate). Based on the observation and previous studies reviewed, aeration can increase the efficiency of NH3-N and colour removal in the electrocoagulation process.

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Section: Optimum Range For Current Densitymentioning

confidence: 96%

Section: Expected Optimum Range For Phmentioning

confidence: 99%

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Study on Ammonia and Colour Removal from Leachate via Aerated Electrocoagulation (Ferum and Aluminium Electrode)

Anuar

Zin

Zailani

et al. 2022

IOP Conf. Ser.: Earth Environ. Sci.

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“…By using electrical energy to dissolve the metals from the electrode surface and destabilize colloidal suspensions, electrocoagulation causes pollutants to flocculate and float [ 23 ]. In comparison to traditional treatment methods, the electrocoagulation (EC) process is a promising and fairly environmentally friendly technology for the removal of contaminants from water and wastewater due to its ease of installation and operation; no need for chemical addition; relatively low operation; and maintenance cost; low sludge production; and high removal efficiency of pollutants [ 24 ]. Some studies were conducted on water treatment utilizing the electrocoagulation process under different operating parameters for the removal of arsenic [ 25 , 26 ], fluoride [ 25 ], bromide [ 27 , 28 ], sulfate [ 29 ], chromium [ 30 ], copper [ 31 ], and selenium [ 32 ].…”

Section: Introductionmentioning

confidence: 99%

Water Treatment Using Natural Coagulant and Electrocoagulation Process: A Comparison Study

Lulesa

Beyene

Bote

et al. 2022

International Journal of Analytical Chemistry

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Water treatment is the primary consideration before utilizing water for different purposes. Surface water is highly vulnerable to pollution, either due to natural or anthropogenic processes. The main targets of this study were to investigate surface water treatment using Moringa Oleifera (MO), the electrocoagulation process (EC), and the Moringa Oleifera assisted electrocoagulation process (MOAEC). The Moringa Oleifera, EC process, and Moringa Oleifera-assisted EC process are effective mechanisms for the removal of COD (Chemical Oxygen Demand), BOD (Biological Oxygen Demand), TDS (Total Dissolved Solids), phosphate, TSS (Total Suspended Solids), and color from surface water. Different operating parameters such as pH (5–11), the dosage of coagulant (0.2–0.5 g), contact time or reaction time (20–50 minutes), current (0.2–0.5 A), and settling time (5–20 minutes) were considered. The maximum removal efficiency using Moringa Oleifera and the EC process was COD (85.48%), BOD (78.50%), TDS (84.5%), phosphate (95.70%), TSS (93.90%), color (94.50%), and COD (90.50%), BOD (87%), TDS (97.50%), phosphate (89.10%), TSS (95.80%), and color (96.15%), respectively. Similarly, with the application of MOAEC, 91.47%, 89.35%, 97.0%, 90.20%, 9.10%, and 95.70% of COD, BOD, TDS, phosphate, TSS, and color were removed, respectively. The EC process and MOAEC were more effective in the removal of COD, BOD, TDS, TSS, and color than using MO. More phosphate was removed using MO than the EC process and MOAEC. Additionally, the effects of different operating parameters were studied on the removal efficiency.

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“…The presence of As(III) in the drinking water can cause cancer in human beings and increases the risk of skin, lungs, bladder, and kidney cancer. As(III) is 60 times more hazardous than As(V) . Thus, the removal of As(III) from groundwater is essential.…”

Section: Introductionmentioning

confidence: 99%

Importance of Chloride Addition on Arsenite Removal by Aluminium Electrocoagulation

et al. 2020

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Effect of chloride addition on arsenite removal by electrocoagulation process was carried out in this study. Electrocoagulation experiments were executed in a 5 L capacity rectangular tank equipped with 7 anodes and 7 cathodes. Addition of chloride significantly enhanced the arsenite removal efficiency of electrocoagulation process and the removal is purely by the separation process, rather than the oxidation of arsenite to arsenate by electrolytically generated active chlorine. 250 mg L−1 of chloride was found as optimal, and more than 99 % of arsenite were removed from its initial concentration of 1 mg L−1 at pH 6, applied voltage of 5 V, and 60 min of electrolysis. Sludge produced after electrocoagulation treatment was analyzed by scanning electron microscopy (SEM) / energy dispersive X‐ray analysis (EDAX), X‐ray diffraction (XRD), and Fourier transforms infrared (FTIR) techniques.

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Arsenite removal from groundwater by aerated electrocoagulation reactor with Al ball electrodes: Human health risk assessment

Cited by 38 publications

References 44 publications

Study on Ammonia and Colour Removal from Leachate via Aerated Electrocoagulation (Ferum and Aluminium Electrode)

Study on Ammonia and Colour Removal from Leachate via Aerated Electrocoagulation (Ferum and Aluminium Electrode)

Water Treatment Using Natural Coagulant and Electrocoagulation Process: A Comparison Study

Importance of Chloride Addition on Arsenite Removal by Aluminium Electrocoagulation

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