Novel water-purification hybrid processes involving in-situ regenerated activated carbon, membrane separation and advanced oxidation

Sarasidis, V.C.; Plakas, Konstantinos V.; Karabelas, A.J.

doi:10.1016/j.cej.2017.07.084

Cited by 41 publications

(15 citation statements)

References 50 publications

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“…A wide range of treatment technology has been explored in the past for possible remediation of wastewaters. These includes; adsorption, precipitation, coagulation-flocculation, sedimentation, flotation, filtration, membrane processes, electrochemical techniques, biological processes, chemical reactions and ion exchange amongst others [5][6][7]. In recent times, adsorption treatment technology, which is a surface phenomenon had been recognised as the most efficient and promising approach in wastewater treatment, due to its simplicity, economic viability, technical feasibility, insensitivity to toxicants, high removal capacity for wide-range of pollutants and environmental friendliness [5,8].…”

Section: Introductionmentioning

confidence: 99%

Preparation and characterisation of activated carbon from Vitisvinifera leaf litter and its adsorption performance for aqueous phenanthrene

et al. 2020

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The adsorption of phenanthrene onto activated carbons produced from Vitis vinifera leaf litter (a waste plant biomass) was investigated in this study. Zinc chloride (ZnCl 2) and phosphoric acid (H 3 PO 4) were utilised as activating agents in producing the activated carbons. The characterisation of the activated carbons was achieved with Fourier transform infrared spectroscopy (for surface functional groups), scanning electron microscopy (for surface morphology) and Brunauer-Emmett-Teller (BET) (for surface area determination). The adsorption of phenanthrene onto the activated carbons was optimised in terms of solution pH, adsorbent dosage, initial concentration of adsorbate solution and contact time. Experimental results showed that H 3 PO 4 modified activated carbon gave better yield (up to 58.40%) relative to ZnCl 2 modified activated carbon (only up to 47.08%). Meanwhile, surface characterisation showed that ZnCl 2 modification resulted in higher BET surface area (up to 616.60 m 2 /g) and total pore volume (up to 0.289 cm 3 /g) relative to BET surface area of up to 295.49 m 2 /g and total pore volume of up to 0.185 cm 3 /g obtained from H 3 PO 4 modified activated carbons. Adsorption equilibrium data fitted well into Freundlich isotherm model relative to other applied isotherm models, with maximum K f value of 1.27 for ZnCl 2 modified activated carbon and 1.16 K f value for H 3 PO 4 modified activated carbon. The maximum adsorption capacity for ZnCl 2 and H 3 PO 4 activated carbons for the removal of phenanthrene were 94.12 and 89.13 mg/g, respectively. Kinetic studies revealed that dynamic equilibrium was reached at 80 min contact time. Experimental data fitted best into the Elovich kinetic model relative to other kinetic models, based on the correlation coefficient (R 2) values obtained from kinetic studies. Chemisorption was deduced as a major phenanthrene removal pathway from aqueous solution and the physicochemical characteristics of the adsorbents have major influence on phenanthrene removal efficiencies.

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Section: Introductionmentioning

confidence: 99%

Preparation and characterisation of activated carbon from Vitisvinifera leaf litter and its adsorption performance for aqueous phenanthrene

et al. 2020

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“…To limit the impact of hazardous dyes, many physicochemical treatments, are employed such as flocculation/coagulation 8 , ion exchange 9 , photocatalysis 10 . The list may be extented to advanced oxidation processes 11 , Membrane processes 12 , Fenton oxidation 13 and biological treatment. However treatments often become inefficient for dye elimination at low concentrations 14 .…”

Section: Introductionmentioning

confidence: 99%

Studies of the potential of a native natural biosorbent for the elimination of an anionic textile dye Cibacron Blue in aqueous solution

Grabi

Derridj

Lemlikchi

et al. 2021

Sci Rep

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This work is devoted to the adsorption of Cibacron Blue (CB) an anionic textile dye, on bean peel (BP) an agricultural waste with neither activation nor carbonization. The adsorption was realized in batch configuration at ambient temperature in acidic medium. The adsorbent was characterized by FTIR, SEM and BET analyses; the equilibrium isotherms and kinetics were also studied. It has been found that this waste could be used as a low-cost biosorbent for CB elimination under optimal working conditions. The rate of CB elimination reaches 95% on bean bark (3.6 g/L) at pH 2.2 and a reject concentration of 25 mg/L. The pseudo-second-order describes suitably the experimental data and the external diffusion is the rate-determining step. The Freundlich isotherm fits better the CB adsorption with a correlation coefficient (R2) of 0.94 and an RMSE = 1.5115. The negative enthalpy (ΔH) and free enthalpy (ΔG°) indicate a physical and spontaneous nature of the CB biosorption onto the biomaterial.

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“…In order to decrease energy consumption, solar photoelectro-Fenton (SPEF) pre-pilot plants were able to produce an average current of 5.0 A to mineralize Yellow 4 diazo-dyes [21], antibiotic chloramphenicol [22], or sulfanilamide [23]. However, designing efficient pilots with high mineralization capacity remains a difficult challenge and combinatorial solutions involving coupling technologies such as catalysis and adsorption or membrane separation have a clear potential [24].…”

Section: Introductionmentioning

confidence: 99%

Hybrid graphene-decorated metal hollow fibre membrane reactors for efficient electro-Fenton - Filtration co-processes

Dumée²,

Lacour

et al. 2019

Journal of Membrane Science

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Metal hollow fibre membranes offer excellent chemical and mechanical stability and are promising platforms for the removal of harsh contaminants from solutions. Stainless steel (SS) membranes are however prone to oxidation and advanced decoration routes are required to passivate the surface of such materials. Here, SS membranes were modified with nanoscale coatings of graphene to promote electrochemical reactions and prevent premature corrosion of the bare metal reinforcement upon electro-Fenton (EF) reaction. Samples decorated with graphene oxide or reduced graphene oxide were compared to bare SS membranes to assess the impact of graphitization on the electrochemical performance of the membranes.Membranes properties were characterized using both cyclic and linear scanning voltammetry.The results evidenced that electron transfer kinetics were significantly enhanced on the reduced graphene oxide, compared to raw material. In addition, the removal efficiency of a pharmaceutical pollutant, paracetamol, was evaluated in electro-Fenton batch experiments, on the three membrane electrodes. The best mineralization current efficiency at 37 % was found when using reduced graphene oxide membrane cathode at optimal applied potential of -0.5 V vs. SCE (Saturated Calomel Electrode). Finally, the coupling of electro-Fenton and filtration processes was carried out on a pilot-scale unit. Various electrochemical and hydrodynamic parameters that affect mineralization efficiency were studied. By coupling filtration and electrochemical processes, the mineralization current efficiency value was increased remarkably by 165 % and remained stable for three consecutive cycles. This strategy opens up opportunities to generate low cost catalytic membrane reactors with high flux and selectivity from the materials reactivity as opposed to sieving, with potential for harsh chemicals mineralization.

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Novel water-purification hybrid processes involving in-situ regenerated activated carbon, membrane separation and advanced oxidation

Cited by 41 publications

References 50 publications

Preparation and characterisation of activated carbon from Vitisvinifera leaf litter and its adsorption performance for aqueous phenanthrene

Preparation and characterisation of activated carbon from Vitisvinifera leaf litter and its adsorption performance for aqueous phenanthrene

Studies of the potential of a native natural biosorbent for the elimination of an anionic textile dye Cibacron Blue in aqueous solution

Hybrid graphene-decorated metal hollow fibre membrane reactors for efficient electro-Fenton - Filtration co-processes

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