Enhanced Removal of Phosphorus from Wastewater Using Sequential Electrocoagulation and Chemical Coagulation

Arambarri, James; Abbassi, Bassim; Zytner, Peter

doi:10.1007/s11270-019-4367-7

Cited by 11 publications

(6 citation statements)

References 21 publications

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“…Arambarri, Abbassi, and Zytner (2019) explored an electro‐kinetic batch treatment where the integration of electrocoagulation and chemical coagulation was used to eliminate phosphorus contamination from microbrewery and synthetic wastewaters. The increased salinity accelerated phosphorous removal and thus, chemical coagulation had a potential to reduce energy consumption.…”

Section: Chemical Processesmentioning

confidence: 99%

Physico‐chemical processes

Yu¹,

Yao²,

Pan³

et al. 2020

Water Environment Research

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By summarizing 187 relevant research articles published in 2019, the review is focused on the research progress of physicochemical processes for wastewater treatment. This review divides into two sections, physical processes and chemical processes. The physical processes section includes three subsections , that is, adsorption, granular filtration, and dissolved air flotation, whereas the chemical processes section has five subsections , that is, coagulation/flocculation, advanced oxidation processes, electrochemical, capacitive deionization, and ion exchange.

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Section: Chemical Processesmentioning

confidence: 99%

Physico‐chemical processes

Yu¹,

Yao²,

Pan³

et al. 2020

Water Environment Research

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“…EC is not always efficient in purifying water in terms of energy costs . Several factors, such as current density, flow rate, plate spacing, and electrode and solution composition, may affect the effectiveness of contaminant removal and energy consumption. , Passivation of aluminum electrodes as well as high solution resistance may result in excessive energy requirements. − The presence of pitting promoters is also important to allow de-passivation of aluminum. Mechelhoff et al compared the passivation of pure aluminum and Al 1050 with a rough or smooth surface in neutral electrolyte solutionsthe rough surface experienced “spontaneous de-passivation” even without the addition of pitting promoters such as chloride …”

Section: Introductionmentioning

confidence: 99%

Physical and Electrochemical Characterization of Aluminum Electrodes during Electrocoagulation

Khor,

Liao,

Iddya

et al. 2024

ACS EST Water

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Electrocoagulation (EC) of synthetic groundwater was conducted using a sacrificial aluminum electrode in a flow-through EC reactor with short retention times (<1 min) under varying hydrodynamic and electrochemical conditions. The treated water was allowed to settle for 24 h and achieved silicate removal of up to 50 ± 4%, and hardness removal of 11 ± 1%. Physical, chemical, and electrochemical characterization was performed to explore changes in electrode surface morphology and composition. Electrochemical impedance spectroscopy (EIS) showed that chemical reactions at the electrode/water interface are sensitive to changes in the immediate chemical environment. We demonstrate that the most energy-intensive step in EC is aluminum dissolution at the anode, which remained fairly constant due to the continuous renewal of the anode's surface, a result of aluminum dissolution. At the cathode, a structural change in the oxide layer, from γ-Al 2 O 3 to gibbsite, was detected by grazing-incidence X-ray diffraction, which decreased the resistance to charge transfer at the cathode surface, resulting in decreased electrode resistance. The high flow rate in the system minimized the accumulation of aluminum hydroxide solids and aluminum ions at the electrode/water interface, which minimized the formation of thick scalants and amorphous Al(OH) 3 on the cathode and anode, respectively. It was further demonstrated by EIS that under these conditions the resistance to charge transfer was constant throughout the duration of the experiment.

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“…There are different methods used for the removal of phosphorous from wastewater including biological, chemical precipitation, electrocoagulation, and adsorption methods 9 . The biological method removes phosphorous from wastewater in high percentages reaching 97% but, with high energy consumption and production of huge amounts of sludge waste which need furthermore treatment 5 , 10 .…”

Section: Introductionmentioning

confidence: 99%

“…Electrocoagulation is a chemical method which involves the use of electric current with electrodes made of iron and aluminum which cause the colloidal contaminants to coagulate like phosphate ions and produce gas bubbles 5 , 10 . The phosphate exists in this wastewater treatment method has a negative charge which leads to the formation of electrical double layers 9 . There is an electrostatic attraction between the pollutants that have negative charge and the hydrolysis product that has positive charge resulting in a destabilization of the electrical double layer and neutralization 9 , 11 .…”

Section: Introductionmentioning

confidence: 99%

“…The phosphate exists in this wastewater treatment method has a negative charge which leads to the formation of electrical double layers 9 . There is an electrostatic attraction between the pollutants that have negative charge and the hydrolysis product that has positive charge resulting in a destabilization of the electrical double layer and neutralization 9 , 11 . After that flocculation process is accomplished, a sedimentation process is done to remove the pollutants (phosphate ions) by settling them down 10 .…”

Section: Introductionmentioning

confidence: 99%

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Optimum phosphate ion removal from aqueous solutions using roller kiln industrial solid waste

Ali,

Abdelwahab,

Roushdy

2024

Sci Rep

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Water scarcity is the most imperative predicament that concerns the population. In this research, a roller kiln (RK) industrial solid waste was used in the adsorption of phosphate ions from aqueous solutions thus converting a waste to wealth through aiding in serving as a water treatment application. The RK waste was produced from an Egyptian factory with a flow rate of million tons/day. Surface characterization for this solid waste was performed including transmission electron microscopy (TEM), X-ray diffraction (XRD), X-ray fluorescence (XRF), Fourier transform infra-red (FTIR), zeta potential (ZP), and particle size distribution (PSD). Based on the kinetics and isotherm studies, the pseudo first order (PFO) kinetic model and Freundlich isotherm model were the best-fitted models with the experimental data as well as the Dubinin–Radushkevich isotherm model indicated that the adsorption type was physical. The attained experimental results were then optimized to attain the experimental conditions at which the optimum adsorption percentage was achieved using response surface methodology (RSM). The optimum percentage removal of phosphate ions 99.5 (%) was achieved at the following experimental conditions; pH 8, temperature = 25 °C, contact time = 9 min, initial phosphate ion concentration = 10 mg/L and adsorbent dose 0.5 = g/L.

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Enhanced Removal of Phosphorus from Wastewater Using Sequential Electrocoagulation and Chemical Coagulation

Cited by 11 publications

References 21 publications

Physico‐chemical processes

Physico‐chemical processes

Physical and Electrochemical Characterization of Aluminum Electrodes during Electrocoagulation

Optimum phosphate ion removal from aqueous solutions using roller kiln industrial solid waste

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