Removal of Hexavalent Chromium Ions From the Simulated Wastewater Using Electrocoagulation Process

Kamar, Firas Hashim; Esgair, Karim Khalifa; Abod, Baker M.; Nechifor, Aurelia Cristina

doi:10.21698/simi.2018.fp14

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…Equation ( 12) was used to calculate the changes in entropy and enthalpy by plotting lnKL against 1/T to give Van't Hoff's plot (Figure 6). ∆H was calculated using the graph's slope, whereas ∆S was calculated using the plot's intercept (Min et al, 2012;Umar et al, 2021). Summary of the results obtained from the thermodynamic evaluation are as presented in table 5.…”

Section: Thermodynamic Studiesmentioning

confidence: 99%

Study on Adsorption of Alizarin Red S and Eriochrome Black T Dyes by Untreated Typha Grass as a Low Cost Adsorbent

Ayuba

Sani

2022

USci

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The purpose of this investigation was to study the adsorptive potential of untreated typha grass (UTG) using a batch system under control conditions to decolorize Alizarin Red S (ARS) and Eriochrome Black T (EBT) anionic toxic dyes from synthetic aqueous solution. In this regard, the impact of various experimental parameters namely, contact time, adsorbent dose, initial dye concentration, pH, and temperature were assessed and optimized. The adsorbent was characterized using Fourier transformed infrared (FTIR) spectroscopy, scanning electron microscopy (SEM), and point of zero charge (PZC) analysis. The maximum adsorption rates of ARS and EBT onto UTG were determined to be 49.92 mg/g and 47.43 mg/g, respectively, at equilibrium. In comparison to previous models evaluated, removal of both ARS and EBT by the UTG demonstrated that the data had a strong fit with pseudo-second-order kinetic and Freundlich adsorption isotherms. The contact time for both dyes was optimised at 15 minutes, while the pH for ARS and EBT were attained at 8 and 2 respectively. However, based on the established results of various parameters in this study, the adsorptive removal of ARS and EBT by UTG was a favourable process. The Van't Hoff plot was used to calculate the thermodynamic quantities of the adsorption process, including ΔG, ΔH and ΔS. The outcomes showed that the process was both spontaneous and thermodynamically possible. From the parameters tested, EBT was found to be better adsorbed onto UTG than ARS. Even though both dyes are anionic in nature, but EBT has additional diazo and nitro functional groups than the hydroxyl and sulphate functional groups present in ARS. This might be the reason for the better adsorption of EBT onto UTG than ARS. Results from this investigation supported the efficiency of UTG as a low-cost and environmentally friendly solution for the adsorption of ARS and EBT from contaminated wastewater.

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Section: Thermodynamic Studiesmentioning

confidence: 99%

Study on Adsorption of Alizarin Red S and Eriochrome Black T Dyes by Untreated Typha Grass as a Low Cost Adsorbent

Ayuba

Sani

2022

USci

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“…A vast majority of researchers have used vertical orientation of electrodes in EC treatment such as PSW (Meiramkulova et al 2019), organics removal from bilge water (Aswathy et al 2016), and nitrate removal from water solution (Al-Marri et al 2020). Some researchers have also conducted a comparative assessments between horizontal and vertical electrode orientation for example, removal of chromium (Kamar et al 2018), oil separation from wastewater (Fadali et al 2016). Recently, Nasrullah et al (2018) investigated various types of electrode design to treat palm oil mill effluent using high current intensity application in the EC process.…”

Section: Theoretical Background Of Electrocoagulation Technologymentioning

confidence: 99%

Treatment of poultry slaughterhouse wastewater using electrocoagulation: a review

Ngobeni

Basitere

Thole

2021

Water Practice and Technology

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Poultry slaughterhouses are generally large consumers of fresh water, which is exhausted as wastewater characterized by a high concentration of biological oxygen demand (BOD), chemical oxygen demand COD, and fats, oil, and grease (FOG). Cost-effective methods are required for the treatment of poultry slaughterhouse wastewater, with the aim of attaining a high quality effluent that can be reused in industrial processes to promote sustainability. As compared to conventional treatment methods, electrocoagulation is an efficient and low-cost system. Electrocoagulation is environmentally friendly, treating wastewater without the need of chemicals, thus limiting secondary pollution. The metal anodes initiate electrochemical reactions for coagulation and flocculation. Its distinct advantages include compact installation and simple operation. This paper offers a comprehensive review of recent literature that has been dedicated to utilizing electrocoagulation for poultry slaughterhouse wastewater treatment. This paper also examines aspects such as theory, potential applications, current applications, as well as economical assessment of the technique.

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“…According to (Moussa et al 2017), physical treatment is a process that concerns the physical removal of unwanted substances from wastewater without causing any change of biological and physical characteristics of water treated, while the chemical process is the addition of chemicals that react with the pollutants to remove them and the biological unit is done through application or utilization of microorganisms for the biodegradation of pollutants from wastewater. The treatment methods are implemented for the wastewater treatment such as adsorption (Mahesh et al 2016;Liu et al 2017;Kamar et al 2018), coagulation-flocculation (Liu et al 2017;Manilal et al 2017), filtration (Liu et al 2017), ion exchange (Kamar et al 2018), chemical oxidation (Mahesh et al 2016;Sharma and Mane 2017), electrocoagulation (Mahesh et al 2016;Sharma and Mane 2017;Safwat 2020), electrodialysis (Kamar et al 2018), aerobic and anaerobic (Mahesh et al 2016), etc. Electrocoagulation (EC) is important in water and wastewater treatment technology that combines electrochemical, chemical, and physical mechanisms which are based on electrochemically dissolving cationic metallic species in situ by oxidizing a sacrificial anode only with the applying of electric current (Papadopoulos et al 2020). The dissolved electrodes form a coagulant species that destabilize and trap pollutants in water and wastewater in the form of suspended particles causing them to form flocs and precipitate, which results in removing pollutants (Papadopoulos et al 2020).…”

Section: Introductionmentioning

confidence: 99%

Investigation on operating parameters and cost using an electrocoagulation process for wastewater treatment

2021

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Wastewater generated from different sources affects the health of living organisms and the natural environment due to the availability of different pollutants. Electrocoagulation (EC) is a good technology implemented for wastewater treatment before discharging to an environment as effluents. The electrocoagulation process is an effective method to the remove the color, chemical oxygen demand (COD), turbidity, and consumption of less energy from wastewater by considering different operating parameters. In this study, the major operating parameters for the electrocoagulation process such as pH (3–7.50), electric current (0.03–0.09 A), electrolytic concentration (1–3 g/L), the distance between electrodes (1–2 cm), electrolysis time (20–60 min) and combination of electrodes (Fe–Fe and Al–Al) were studied. The maximum removal of color–94.40%, COD–97.02%, and turbidity–90.91% with required energy consumption –36kWhr/m3 was obtained at the electric current–0.09 A, electrolyte concentration–3 g/L, pH–7, electrode combination–Fe–Fe, and distance between electrodes–3 cm, respectively. The studied parameters were affected the removal % color, % COD, % turbidity, and also the consumption of energy depending on the desired setup of fixed values of the parameter. Consumption of energy and electrode dissolution is related to the cost of operating in electrocoagulation in addition to the cost of labor and the small amount of sludge produced for disposal.

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Removal of Hexavalent Chromium Ions From the Simulated Wastewater Using Electrocoagulation Process

Cited by 4 publications

References 4 publications

Study on Adsorption of Alizarin Red S and Eriochrome Black T Dyes by Untreated Typha Grass as a Low Cost Adsorbent

Study on Adsorption of Alizarin Red S and Eriochrome Black T Dyes by Untreated Typha Grass as a Low Cost Adsorbent

Treatment of poultry slaughterhouse wastewater using electrocoagulation: a review

Investigation on operating parameters and cost using an electrocoagulation process for wastewater treatment

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