Kinetics and Isotherms of an Iron-Modified Montmorillonite/Polycaprolactone Composite Nanofiber Membrane for the Adsorption of Cu(II) Ions

2020 ◽  
Vol 995 ◽  
pp. 183-188
Author(s):  
Lester Raj Somera ◽  
Ralph Cuazon ◽  
John Kenneth Cruz ◽  
Leslie Joy L. Diaz
Keyword(s):  
Adsorption Capacity ◽  
Contact Time ◽  
Metal Ion ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Order Kinetic ◽  
Nanofiber Membrane ◽  
Modified Montmorillonite ◽  
Sorption Energy ◽  
Kinetics And Isotherms

Exposure to toxic concentrations of Cu (II) continues to rise as developing countries undergo rapid industrialization. Because of its high solubility in water, improperly disposed copper contaminate our water sources in its aqueous Cu (II) form. A nanofiber membrane composed of iron-modified montmorillonite (Fe-MMt) dispersed in polycaprolactone (PCL) was electrospun for the adsorption of Cu (II) ions. Kinetics and isotherm models were used to study the adsorption behavior of the fabricated membrane. The adsorption capacity of this membrane was observed as a function of increasing contact time and initial Cu (II) ion concentration. Kinetic studies showed that Cu (II) adsorption follows a pseudo-second order kinetic model, while isotherm studies determined the adsorption to be monolayer as described by the Langmuir isotherm. Furthermore, it was observed that the adsorption capacity increases with increasing contact time, and with increasing initial metal ion concentration up to a maximum value of 6.44 mgg-1. Lastly, the Dubinin-Kaganer-Radushkevich isotherm was used to calculate for the sorption energy and determine the type of adsorption. A sorption energy of-5.83 kJmol-1 was obtained, thus the adsorption was classified to be physical.

scholarly journals Nano sized carbonized waste biomass for heavy metal ion remediation

2014 ◽  
Vol 16 (4) ◽  
pp. 6-13 ◽  
Author(s):  
Garima Mahajan ◽  
Dhiraj Sud
Keyword(s):  
Heavy Metal ◽  
Aqueous Solutions ◽  
Metal Ions ◽  
Contact Time ◽  
Metal Ion ◽  
Agricultural Waste ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Order Kinetic ◽  
Waste Biomass

Abstract Utilization of agricultural waste material with approach to enhance the heavy metal remediation properties by carbonizing the biomass at nano size particles has been explored in present investigation from aqueous solutions. In this study the lignocellulosic, nitrogenous agricultural waste biomass Delbergia sissoo pods (DSP) has been tried for sequestering of Cd (II), Pb (II) and Ni (II) metal ions from aqueous solutions. Batch experiments were performed for removal of targeted metal ions keeping in consideration the preliminary affecting parameters such as effect of adsorption dose, pH, initial metal ion concentration, stirring speed and contact time. The sorption studies were analyzed by using, Freundlic isotherm and Langmuir isotherm models. The kinetics of the process was evaluated by pseudo pseudo-first order and pseudo second order kinetic models. Studies reveal that the equilibrium was achieved with in 30 min of the contact time at optimized parameters. Analytical studies of biosorbent were done by means of FT-IR, SEM and XRD. Desorption experiments were carried out using HCl solution with a view to regenerate the spent adsorbent and to recover the adsorbed metal ions.

Application of radiation grafted waste polypropylene fabric for the effective removal of Cu (II) and Cr (III) ions

2022 ◽  
Vol 0 (0) ◽  
Author(s):  
Md. Nabul Sardar ◽  
Nazia Rahman ◽  
Shahnaz Sultana ◽  
Nirmal Chandra Dafader
Keyword(s):  
Adsorption Capacity ◽  
Metal Ion ◽  
Aqueous Media ◽  
Thermo Gravimetric Analysis ◽  
Ion Concentration ◽  
Gravimetric Analysis ◽  
Order Kinetic ◽  
Polypropylene Fabric ◽  
Alternative Material ◽  
Waste Polypropylene

Abstract This study focuses on the adsorption of hazardous Cr (III) and Cu (II) ions from aqueous solution by applying modified waste polypropylene (PP) fabric as an adsorbent. Pre-irradiation technique was performed for grafting of sodium styrene sulfonate (SSS) and acrylic acid (AAc) onto the PP fabric. The monomer containing 8% SSS and 16% AAc in water was used. Graft yield at 30 kGy radiation dose was 390% when 4% NaCl was added as additive. The prepared adsorbent was characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), thermo-gravimetric analysis (TGA) and dynamic mechanical analyzer (DMA). The influences of different parameters including pH, contact time, temperature and initial metal ion concentration were also investigated. The equilibrium adsorption data were better fitted to the Langmuir isotherm model with maximum monolayer adsorption capacity 384.62 mg/g for Cr (III) and 188.68 mg/g for Cu (II) ions. The kinetic data were better explained by pseudo first-order kinetic model having good matching between the experimental and theoretical adsorption capacity. The adsorption process was spontaneous, endothermic and thermodynamically feasible. Furthermore, investigation of desorption of metal ions and reuse of the adsorbent suggesting that the adsorbent is an efficient and alternative material in the removal of Cr (III) and Cu (II) from aqueous media.

Adsorption of heavy metals from aqueous solutions by Mg–Al–Zn mingled oxides adsorbent

2016 ◽  
Vol 74 (7) ◽  
pp. 1644-1657 ◽  
Author(s):  
Mona El-Sayed ◽  
Gh. Eshaq ◽  
A. E. ElMetwally
Keyword(s):  
Heavy Metals ◽  
Metal Ion ◽  
Second Order ◽  
Ion Concentration ◽  
Precipitation Method ◽  
Isotherm Models ◽  
Infrared Spectrometry ◽  
Maximum Adsorption Capacity ◽  
Order Kinetic ◽  
Pseudo Second Order

In our study, Mg–Al–Zn mingled oxides were prepared by the co-precipitation method. The structure, composition, morphology and thermal stability of the synthesized Mg–Al–Zn mingled oxides were analyzed by powder X-ray diffraction, Fourier transform infrared spectrometry, N2 physisorption, scanning electron microscopy, differential scanning calorimetry and thermogravimetry. Batch experiments were performed to study the adsorption behavior of cobalt(II) and nickel(II) as a function of pH, contact time, initial metal ion concentration, and adsorbent dose. The maximum adsorption capacity of Mg–Al–Zn mingled oxides for cobalt and nickel metal ions was 116.7 mg g−1, and 70.4 mg g−1, respectively. The experimental data were analyzed using pseudo-first- and pseudo-second-order kinetic models in linear and nonlinear regression analysis. The kinetic studies showed that the adsorption process could be described by the pseudo-second-order kinetic model. Experimental equilibrium data were well represented by Langmuir and Freundlich isotherm models. Also, the maximum monolayer capacity, qmax, obtained was 113.8 mg g−1, and 79.4 mg g−1 for Co(II), and Ni(II), respectively. Our results showed that Mg–Al–Zn mingled oxides can be used as an efficient adsorbent material for removal of heavy metals from industrial wastewater samples.

scholarly journals Biosorption of Cr(III) from aqueous solution using an agricultural by-product jute stick powder: Equilibrium and kinetic studies

2018 ◽  
Vol 9 (3) ◽  
pp. 202-212 ◽  
Author(s):  
Mohammad Nasir Uddin ◽  
Jahangir Alam ◽  
Syeda Rahimon Naher
Keyword(s):  
Aqueous Solution ◽  
Contact Time ◽  
Metal Ion ◽  
Water Solution ◽  
Low Cost ◽  
Isotherm Models ◽  
Infrared Spectrometry ◽  
Order Kinetic ◽  
Adsorption Model ◽  
Experimental Conditions

The adsorption capacity of chromium(III) from synthetic waste water solution by a low cost biomaterial, Jute Stick Powder (JSP)was examined. A series of batch experiments were conducted at different pH values, adsorbent dosage and initial chromium concentration to investigate the effects of these experimental conditions. To analyze the metal adsorption on to the JSP, most common adsorption isotherm models were applied. To study the reaction rate, the kinetic and diffusion models were also applied. The morphological structure and variation of functional groups in the JSP before and after adsorption was examined by scanning electron microscope (SEM) and Fourier transform infrared spectrometry (FT-IR). Maximum chromium removal capacities of JSP was 84.34%with corresponding equilibrium uptake 8.4 mg/g from 50 mg/L of synthetic metal solution in 60 minutes of contact time at pH = 6.0 and 28 °C with continuous stirring at 180 rpm. The percent sorption of the biomass decreased with increasing concentration of metal ion but increased with decreasing pH, increasing contact time and adsorbent doses. Data for this study indicated a good correspondence with both isotherms of Langmuir and Freundlich isotherm. The analysis of kinetic indicated that Chromium was consistent with the second-order kinetic adsorption model. The rate of removal of Cr(III) ions from aqueous solution by JSP was found rapid initially within 5-30 minutes and reached in equilibrium in about 40 minutes. The investigation revealed that JSP, a low cost agricultural byproduct, was a potential adsorbent for removal of heavy metal ions from aqueous solution.

scholarly journals Biosorption of Mn (II) by Spirogyra verrucosa collected from Manganese Mine Water

2016 ◽  
Vol 3 (3) ◽  
pp. 282
Author(s):  
Shailesh Rambhau Bansod ◽  
P B Nandkar
Keyword(s):  
Mine Water ◽  
Contact Time ◽  
Metal Ion ◽  
Mine Drainage ◽  
Abandoned Mines ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Treatment Technology ◽  
Biosorption Process ◽  
Green Algal

Mining industries frequently generates acid mine drainage (AMD) either by its operating or abandoned mines which are often characterized by an elevated levels of certain heavy metals, sulphate, low pH and some other toxic impurities in mine water creates environmental and ecological problems. Present study planned to suggest role of alga Spirogyra verrucosa in Manganese (Mn) removal by biosorption process from the mine water of Manganese mines of Nagpur District, Vidarbha Region, Maharashtra. The biosorption of Mn(II) ions from aqueous solution by using dead green algal (S.verrucosa) biomass was investigated by studying effect of pH, temperature, quantity of biosorbent, contact time as well as initial metal ion concentration. The optimized values obtained with respect to these parameters clearly indicates that pH 5, temperature 30°C, biosorbent quantity 1.0 gm/l, contact time 120 min. and initial metal ion concentration 50mg/l were the basic requirement for the biosorption of Mn(II) ions by dead algal biomass. Also, the biosorption kinetic and isotherm modeling applied to the equilibrium data for biosorption of Mn(II) ions onto alga reveals the fitness of the pseudo-second-order rate expression (R2=0.994) as well as the suitability of Langmuir (R2=0.859) and Freundlich (R2=0.761) isotherm models with an indication of the applicability of this metal ion-dried algal system for removal of Mn(II) ions in a monolayer biosorption as well as heterogenous surface conditions. However, comparatively biosorption equilibrium was better described by Langmuir isotherm model with monolayer biosorption capacity of S.verrucosa biomass 21.80 mg/g. Also, the maximum removal 40.66 mg/g (80.20%) of Mn(II) ion by alga under optimized conditions promises the potential use in mine water treatment technology.

scholarly journals Bio-sorption for Effective Removal of Chromium (VI) from Wastewater Using Moringa Stenopetala Seed Powder (MSSP) and Banana Peel Powder (BPP)

2020 ◽  
Author(s):  
Tolera Seda Badessa ◽  
Esayas Wakuma ◽  
Ali Mohammed Yimer
Keyword(s):  
Sorption Capacity ◽  
Contact Time ◽  
Metal Ion ◽  
Ion Concentration ◽  
Banana Peel ◽  
Order Kinetic ◽  
Moringa Stenopetala ◽  
Kinetics Of Adsorption ◽  
Banana Peel Powder ◽  
Adsorbent Dose

Abstract Chromium is an extremely toxic metal in the form of Cr (VI) that causes severe environmental and health problems. Therefore, the aim of this study was to remove chromium ions from wastewater by using cost effective and environmentally friendly bio-sorbents; Moringa stenopetala Seed Powder (MSSP), and Banana Peel Powder (BPP) and to evaluate its adsorption capacities as bio-sorbents. FT-IR characterization of the adsorbents showed that there was a change in the functional groups of the structure of both adsorbents before and after the adsorption that might be due to the adsorption processes taken place on the surface of adsorbent. Adsorption experiments were carried out as batch studies with different contact times, pH, adsorbent dose, initial metal ion concentration, and temperature. Results showed maximum removal efficiency for Cr (VI) at 120 minutes contact time, adsorbent dose of 20 g/L and pH 2 by MSSP and pH 4 by BPP. The percentage removal of Cr(VI) increased with increasing adsorbent dose( from 5g/L to 20 g/L) and contact time (from 60 min to 120 min). Freundlich isotherm model showed a better fit to the equilibrium data than the Langmuir model. The kinetics of adsorption for chromium was well represented by pseudo-second order kinetic model and the calculated equilibrium sorption capacity of the model showed good agreement with the sorption capacity obtained from Experimental results.

scholarly journals Equilibrium and kinetics studies for the adsorption of Ni2+ and Fe3+ ions from aqueous solution by graphene oxide

2017 ◽  
Vol 19 (3) ◽  
pp. 120-129 ◽  
Author(s):  
Wojciech Konicki ◽  
Małgorzata Aleksandrzak ◽  
Ewa Mijowska
Keyword(s):  
Graphene Oxide ◽  
Kinetic Model ◽  
Metal Ion ◽  
Second Order ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Order Kinetic ◽  
Intraparticle Diffusion Model ◽  
Order Kinetic Model ◽  
Pseudo Second Order

Abstract In this study, the adsorption of Ni2+ and Fe3+ metal ions from aqueous solutions onto graphene oxide (GO) have been explored. The effects of various experimental factors such as pH of the solution, initial metal ion concentration and temperature were evaluated. The kinetic, equilibrium and thermodynamic studies were also investigated. The adsorption rate data were analyzed using the pseudo-first-order kinetic model, the pseudo-second-order kinetic model and the intraparticle diffusion model. Kinetic studies indicate that the adsorption of both ions follows the pseudo-second-order kinetics. The isotherms of adsorption data were analyzed by adsorption isotherm models such as Langmuir and Freundlich. Equilibrium data fitted well with the Langmuir model. The maximum adsorption capacities of Ni2+ and Fe3+ onto GO were 35.6 and 27.3 mg g−1, respectively. In addition, various thermodynamic parameters, such as enthalpy (ΔHO), entropy (ΔSO) and Gibbs free energy (ΔGO), were calculated.

scholarly journals Yam Peels as Adsorbent for the Removal of Copper (Cu) and Manganese (Mn) in Waste Water

2017 ◽  
Vol 1 (2) ◽  
pp. 230-243 ◽  
Author(s):  
E. S. Isagba ◽  
S. Kadiri ◽  
I. R. Ilaboya
Keyword(s):  
Waste Water ◽  
Experimental Data ◽  
Metal Ions ◽  
Kinetic Models ◽  
Contact Time ◽  
Metal Ion ◽  
Second Order ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Pseudo Second Order

This paper investigated the use of yam peel as a natural adsorbent for the removal of Copper (Cu) and Manganese (Mn) from waste water. The yam peels were thoroughly washed with distilled water, dried, pulverized and carbonized. The carbonized yam peel was then characterized for its particle sizes, moisture content, ash content, volatile matter, Methylene Blue number, Iodine number. The raw yam peels were prepared using the same procedure, but was not carbonized. The adsorption of Mn(II) and Cu(II) ions were investigated using adsorption experiment at room temperature. The effect of contact time, metal ion concentration and dosage were evaluated. The residual concentrations of the metal ions were determined by Atomic Absorption Spectrophotometer (AAS). Experimental data obtained were analyzed using Kinetic models and Isotherms such as Pseudo- First order kinetic models, Pseudo-second order kinetic models, Langmuir isotherms and Freundlich isotherm. The analysis showed that the pseudo-second order kinetic model best described the adsorption of the metal ions; ( Cu; r2 = 0.991 for RYP and r2 = 0.834 for AYP) and (Mn; r2 = 0.958 for RYP and r2 = 0.896 for AYP) and the experimental data best fit the Freundlich model; (Cu; r2 = 0.564 for RYP and r2 = 0.871 for AYP) and (Mn; r2 = 0.685 for RYP and r2 = 0.736 for AYP). Finally, optimum removal efficiencies of 30.54% for Mn(II) and 39.62% for Cu(II) were obtained for AYP at concentrations of 50mg/l and mass dosage of 1.0g, 120 minutes contact time and a pH of 6.8.

Equilibrium sorption of divalent metal ions onto groundnut (Arachis hypogaea) shell: kinetics, isotherm and thermodynamics

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Metal Ions ◽  
Arachis Hypogaea ◽  
Metal Ion ◽  
Ion Concentration ◽  
Isotherm Models ◽  
Standard Entropy ◽  
Order Kinetic ◽  
Divalent Metal Ions ◽  
Solution Ph ◽  
Biosorption Process

The equilibrium, kinetics, and thermodynamics of the biosorption of Pb(II), Cd(II) and Zn(II) onto groundnut (Arachis hypogaea) shell were investigated under various physicochemical parameters. Optimisation studies were carried out using batch biosorption studies. The extent of the metal ion biosorption increased with increase in solution pH, initial metal ion concentration, dosage of biosorbent and contact time but decreased with the temperature of the system. The biosorption of each of the metal ions was found to be pH-dependent. Kinetic study showed that the metal ions biosorption process followed the pseudo-second-order kinetic model. The sorption of each metal ion was analysed with Freundlich and Langmuir isotherm models, in each case, the equilibrium data were better represented by Freundlich isotherm model. Thermodynamically, parameters such as standard Gibbs free energy (ΔG˚), standard enthalpy (ΔH˚), standard entropy (ΔS˚) and the activation energy (A) were calculated. The biosorption of each metal ion was spontaneous and the order of spontaneity of the biosorption process being Cd(II) > Zn(II) > Pb(II). Similarly, change in entropy was observed for each and the order of disorder is Cd(II) > Zn(II) > Pb(II).

scholarly journals Adsorption kinetic, equilibrium and thermodynamic investigations of Zn(II) and Ni(II) ions removal by poly(azomethinethioamide) resin with pendent chlorobenzylidine ring

2015 ◽  
Vol 17 (3) ◽  
pp. 100-109 ◽  
Author(s):  
P. Senthil Kumar ◽  
H. Ethiraj ◽  
Anita Venkat ◽  
N. Deepika ◽  
S. Nivedha ◽  
...  
Keyword(s):  
Kinetic Model ◽  
Metal Ions ◽  
Adsorption Capacity ◽  
Metal Ion ◽  
Adsorption Kinetic ◽  
Ion Concentration ◽  
Order Kinetic ◽  
Intraparticle Diffusion Model ◽  
Model Based ◽  
Kinetic Equilibrium

Abstract This paper reports the application of poly(azomethinethioamide) (PATA) resin having the pendent chlorobenzylidine ring for the removal of heavy metal ions such as Zn(II) and Ni(II) ions from the aqueous solutions by adsorption technology. Kinetic, equilibrium and thermodynamic models for Zn(II) and Ni(II) ions adsorption were applied by considering the effect of contact time, initial metal ion concentration and temperature data, respectively. The adsorption influencing parameters for the maximum removal of metal ions were optimized. Adsorption kinetic results followed the pseudo-second order kinetic model based on the correlation coefficient (R2) values and closed approach of experimental and calculated equilibrium adsorption capacity values. The removal mechanism of metal ions by PATA was explained with the Boyd kinetic model, Weber and Morris intraparticle diffusion model and Shrinking Core Model (SCM). Adsorption equilibrium results followed the Freundlich model based on the R2 values and error functions. The maximum monolayer adsorption capacity of PATA for Zn(II) and Ni(II) ions removal were found to be 105.4 mg/g and 97.3 mg/g, respectively. Thermodynamic study showed the adsorption process was feasible, spontaneous, and exothermic in nature.

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