Removal of arsenic from groundwater rich in natural organic matter (NOM) by continuous electrocoagulation/flocculation (ECF)

Mohora, Emilijan; Rončević, Srđan; Agbaba, Jasmina; Tubić, Aleksandra; Mitić, Milena; Klašnja, Mile; Dalmacija, Božo

doi:10.1016/j.seppur.2014.09.006

Cited by 78 publications

(28 citation statements)

References 23 publications

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“…The DOC removal efficiencies smaller than the one recorded through UV 254 absorbance indicate ability of the EC process to fraction the high HA molecular weight into more hydrophilic organic molecules, the more difficult to be removed through the EC process [14]. As we expected, the specific energy consumption was not influenced by the initial concentration of arsenic ( fig.…”

Section: In Figures 2(a) and (B) The Influence Of The Initial Concentmentioning

confidence: 52%

“…Better performances for arsenic removal through the electrocoagulation process were recorded using iron electrodes [12]. The negative influence of NOM on arsenic removal using iron electrodes [13,14] had previously been reported and the particularity of each result related to the water matrix.…”

Section: Introductionmentioning

confidence: 79%

“…The presence of NOM in water influence the coagulation/flocculation mechanism by affecting the flock formation due to the more negative Zeta potential along the EC process [14]. Several aspects regarding the simultaneous removal of these two pollutants from drinking water by electrocoagulation using aluminium electrodes were clarified by Mohora et al [14].…”

Section: Introductionmentioning

confidence: 99%

“…Several aspects regarding the simultaneous removal of these two pollutants from drinking water by electrocoagulation using aluminium electrodes were clarified by Mohora et al [14].…”

Section: Introductionmentioning

confidence: 99%

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Drinking water treatment by iron anode-based electrocoagulation: humic acids and arsenic removal

Pop

Bordianu

Pode

et al. 2016

WIT Transactions on Ecology and the Environment

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Electrocoagulation (EC) represents an alternative to the conventional coagulation process in water treatment in low-capacity plants. Besides the electrode materials, the performance of electrocoagulation is strongly dependent on the raw water matrix. A systematic study has been conducted in this paper in order to optimize the electrocoagulation process operation using iron anode for groundwater with high organic loading and arsenic. The optimization of electrocoagulation parameters was performed, focusing on initial concentration of arsenic and humic acid, current density, the presence of major ions dissolved in water (SO4 2-, Cl -). Humic substances were quantified in terms of absorbance at 254 nm and total organic carbon (TOC) and the arsenic concentration has been assessed in water samples by atomic absorption spectrometry. To elucidate some mechanistic aspect, SEM/EDAX analysis was performed. A systematic study based on various raw water characteristics has been performed for EC process based on iron electrodes to determine the best operating conditions and also, to identify the limits of this process. The specific energy consumption was calculated in order to demonstrate also the process viability from economical point of view. Various treatment scenarios in relation to raw water characteristics and operation conditions were applied in order to determine the optimal conditions regarding process parameters correlated to the range of water characteristics for the drinking water treatment.

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Section: In Figures 2(a) and (B) The Influence Of The Initial Concentmentioning

confidence: 52%

Section: Introductionmentioning

confidence: 79%

Section: Introductionmentioning

confidence: 99%

“…Several aspects regarding the simultaneous removal of these two pollutants from drinking water by electrocoagulation using aluminium electrodes were clarified by Mohora et al [14].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Drinking water treatment by iron anode-based electrocoagulation: humic acids and arsenic removal

Pop

Bordianu

Pode

et al. 2016

WIT Transactions on Ecology and the Environment

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“…Ulu et al [55] suggested that during electrocoagulation, the functional groups of humic acid are attracted to positive Al species which facilitates their removal. Mohora et al [56] also added that due to electrocoagulation, high molecular weight fraction of NOMs was degraded into low molecular weight and more hydrophilic compounds which are less prone to coagulate.…”

Section: Removal Of Conventional Pollutantsmentioning

confidence: 99%

Removal of Pharmaceuticals from Wastewater by Intermittent Electrocoagulation

Ensano

Borea

Naddeo

et al. 2017

Water

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Abstract:The continuous release of emerging contaminants (ECs) in the aquatic environment, as a result of the inadequate removal by conventional treatment methods, has prompted research to explore viable solutions to this rising global problem. One promising alternative is the use of electrochemical processes since they represent a simple and highly efficient technology with less footprint. In this paper, the feasibility of treating ECs (i.e., pharmaceuticals) using an intermittent electrocoagulation process, a known electrochemical technology, has been investigated. Diclofenac (DCF), carbamazepine (CBZ) and amoxicillin (AMX) were chosen as being representative of highly consumed drugs that are frequently detected in our water resources and were added in synthetic municipal wastewater. The removal efficiencies of both individual and combined pharmaceuticals were determined under different experimental conditions: hydraulic retention time (HRT) (6, 19 and 38 h), initial concentration (0.01, 4 and 10 mg/L) and intermittent application (5 min ON/20 min OFF) of current density (0.5, 1.15 and 1.8 mA/cm 2 ). Results have shown that these parameters have significant effects on pharmaceutical degradation. Maximum removals (DCF = 90%, CBZ = 70% and AMX = 77%) were obtained at a current density of 0.5 mA/cm 2 , an initial concentration of 10 mg/L and HRT of 38 h.

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