Immobilization of cobalt ions using hierarchically porous 4A zeolite-based carbon composites: Ion-exchange and solidification

Al‐Jubouri, Sama M.; Holmes, Stuart M.

doi:10.1016/j.jwpe.2019.101059

Cited by 47 publications

(20 citation statements)

References 41 publications

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“…46 On the other hand, zeolite is an inorganic material that is known for its ion exchange power, high porosity, large surface area, high regeneration potential, strong acidic stability, readily available and low cost. 47 It also has a unique feature that allows other molecular dimensions to move through and shows good cations selectivity. 47,48 Many studies also have reported that zeolite is very effective for removal of organic compound and heavy metals from wastewater.…”

Section: Introductionmentioning

confidence: 99%

Treatment of oil refinery effluent using bio-adsorbent developed from activated palm kernel shell and zeolite

2020

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Section: Introductionmentioning

confidence: 99%

Treatment of oil refinery effluent using bio-adsorbent developed from activated palm kernel shell and zeolite

2020

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“…Therefore, in the current study, the CFSD model will be described by Equation (12). The parameter D am K δ and the coefficient of mass transfer (k) can be calculated numerically by inserting (R o ) versus (J) data.…”

Section: Combined Film Theory/solution-diffusion Model (Cfsd)mentioning

confidence: 99%

“…According to the Levenberg-Marquardt method [50], the experimental data were analyzed using the SPSS version 22 nonlinear parameter estimation program, where the observed rejection (R o ) and permeate flux (J) were calculated at conditions in which various parameters were altered (i.e., feed pH, PES membrane type, and initial ion concentration) for each dataset. The parameters estimated by applying the different models expressed by Equations (12), (20), and (22) were employed to calculate the PES membrane transport parameters and mass transfer coefficients according to their respective relations. To obtain the R o of the PES membrane for different J values, these parameters were subsequently used according to the specification of each individual model, as presented in Tables 3 and 4.…”

Section: Estimating Parameters For the Membrane And Coefficient Of Mamentioning

confidence: 99%

“…Furthermore, in the adsorption process, some adsorbents have limited capacities, low selectivity, require a long adsorption contact time, and show slow adsorption kinetics, even as most of the adsorbents, especially the synthetic nanoparticles, are expensive. Also, solvent extraction and chemical precipitation are considered to be polluting processes themselves [2][3][4][5][6][7][8][9][10][11][12].…”

Section: Introductionmentioning

confidence: 99%

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Experimental and Theoretical Analysis of Lead Pb2+ and Cd2+ Retention from a Single Salt Using a Hollow Fiber PES Membrane

et al. 2020

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The present work reports the performance of three types of polyethersulfone (PES) membrane in the removal of highly polluting and toxic lead Pb2+ and cadmium Cd2+ ions from a single salt. This study investigated the effect of operating variables, including pH, types of PES membrane, and feed concentration, on the separation process. The transport parameters and mass transfer coefficient (k) of the membranes were estimated using the combined film theory-solution-diffusion (CFSD), combined film theory-Spiegler-Kedem (CFSK), and combined film theory-finely-porous (CFFP) membrane transport models. Various parameters were used to estimate the enrichment factors, concentration polarization modulus, and Péclet number. The pH values significantly affected the permeation flux of the Pb2+ solution but only had a slight effect on the Cd2+ solution. However, Cd2+ rejection was highly improved by increasing the pH value. The rejection of the PES membranes increased greatly as the heavy metal concentration rose, while the heavy metal concentration moderately affected the permeation flux. The maximum rejection of Pb2+ in a single-salt solution was 99%, 97.5%, and 98% for a feed solution containing 10 mg Pb/L at pH 6, 6.2, and 5.7, for PES1, PES2, and PES3, respectively. The maximum rejection of Cd2+ in single-salt solutions was 78%, 50.2%, and 44% for a feed solution containing 10 mg Cd/L at pH 6.5, 6.2, and 6.5, for PES1, PES2, and PES3, respectively. The analysis of the experimental data using the CFSD, CFSK, and CFFP models showed a good agreement between the theoretical and experimental results. The effective membrane thickness and active skin layer thickness were evaluated using the CFFP model, indicating that the Péclet number is important for determining the mechanism of separation by diffusion.

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“…Because the removal of heavy metals and radioactive wastes that exist in the form of cations has become an urgent issue, different treatment technologies have been used and improved so far to achieve an effective reduction of the concentrations of the toxic pollutant such as chemical precipitation, evaporation, extraction, membrane filtration, adsorption, coagulation, flocculation, sedimentation, thermal treatment, and ion exchange [9][10][11][12]. The above techniques show some drawbacks such as the cost of flotation and chemical precipitation resulting from generating extra sludge; poor selectivity and high sensitivity to pH for the ion-exchange process, nonselective, and generating intractable sludge for adsorption process.…”

Section: Introductionmentioning

confidence: 99%

Performance Evaluation of Polyethersulfone Membranes for Competitive Removal of Cd2+, Co2+, and Pb2+ Ions from Simulated Groundwater

et al. 2021

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This paper presents studying the performance of three types of polyethersulfone (PES) membrane for the simultaneous removal of Co2+ ions, Cd2+ ions, and Pb2+ ions from binary and ternary aqueous solutions. Co2+ ions, Cd2+ ions, and Pb2+ ions with two different initial concentrations (e.g., 10 and 50 ppm) were selected as examples of heavy metals that contaminate the groundwater as a result of geological and human activities. This study investigated the effect of types of PES membrane and metal ions concentration on the separation process. For the binary aqueous solutions, the permeation flux of the PES2 membranes was higher for the separation process of solutions containing 50 ppm of Cd2+ ions and 10 ppm of Co2+ ions (24.7 L/m2·h) and Pb2+ ions (23.7 L/m2·h). All the metals in the binary solutions had high rejection when their initial concentration was lower than the initial concentration of the other metal present in the same solution. Using PES2, the maximum rejection of Cd2+ ions was 61.3% when the initial concentrations were 50 ppm Pb2+ ions: 10 ppm Cd2+ ions and 55.4% for Pb2+ ions when the initial concentrations were 10 ppm Pb2+ ions: 50 ppm Cd2+ ions. For the ternary aqueous solutions, the rejection and the permeation flux of the PES membranes increased with decreasing the heavy metal initial concentration. Using PES2, the maximum permeation flux was 21.6 L/m2·h when the initial concentration of the metals was 10 ppm; and the maximum rejection of the metals obtained at initial concentration of 10 ppm was 50.5% for Co2+ ions, 48.3% for Cd2+ ions, and 40% for Pb2+ ions. The results of the filtration process using PES2 of simulated contaminated-groundwater indicated the efficient treatment of groundwater containing Co2+, Cd2+, and Pb2+ ions.

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Immobilization of cobalt ions using hierarchically porous 4A zeolite-based carbon composites: Ion-exchange and solidification

Cited by 47 publications

References 41 publications

Treatment of oil refinery effluent using bio-adsorbent developed from activated palm kernel shell and zeolite

Treatment of oil refinery effluent using bio-adsorbent developed from activated palm kernel shell and zeolite

Experimental and Theoretical Analysis of Lead Pb2+ and Cd2+ Retention from a Single Salt Using a Hollow Fiber PES Membrane

Performance Evaluation of Polyethersulfone Membranes for Competitive Removal of Cd2+, Co2+, and Pb2+ Ions from Simulated Groundwater

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