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.

scholarly journals Effective removal of heavy metal ions from aqueous solutions using a new chelating resin poly [2,5-(1,3,4-thiadiazole)-benzalimine]: kinetic and thermodynamic study

2015 ◽  
Vol 6 (2) ◽  
pp. 310-324 ◽  
Author(s):  
Selvaraj Dinesh Kirupha ◽  
Selvaraj Kalaivani ◽  
Thangaraj Vidhyadevi ◽  
Periyaraman Premkumar ◽  
Palanithamy Baskaralingam ◽  
...  
Keyword(s):  
Metal Ions ◽  
Metal Ion ◽  
Ph Value ◽  
Thermo Gravimetric Analysis ◽  
Kinetic Studies ◽  
Ion Concentration ◽  
Chelating Resin ◽  
Gravimetric Analysis ◽  
Equilibrium Data ◽  
Experimental Values

A novel poly [2,5-(1,3,4-thiadiazole)-benzalimine] abbreviated as TDPI adsorbent was synthesized using simple polycondensation technique. The synthetic route involves the preparation of 2,5-diamino-1,3,4-thiadiazole from 2,5-dithiourea and subsequent condensation with terephthalaldehyde. The resin was chemically characterized using Fourier transform infrared (FT-IR), 1H-NMR, and 13C-NMR spectroscopic analysis. Surface morphology and thermal stability were analyzed using scanning electron microscopy (SEM) and thermo-gravimetric analysis (TGA). The effect of the pH value of solution, contact time, adsorbent dose, and initial metal ion concentration were investigated by batch equilibrium adsorption experiments. Kinetic studies show that the adsorption of metal ions onto the resin proceeds according to the pseudo-second-order model and the equilibrium data were best interpreted by the Redlich–Peterson isotherm. The experimental values of the adsorption capacities of Pb2+, Cu2+, Ni2+, and Cd2+ on to TDPI could reach up to 437.2, 491.6, 493.7, and 481.9 mg.g−1 respectively. The exothermic nature of the process, the affinity of the adsorbent towards the metal ions and the feasibility of the process are explained in the thermodynamic parameters. The resin stability and re-usability studies suggest that the resin is chemically stable (0.3 N HCl and H2SO4) and could be regenerated without any serious decline in performance.

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.

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 Sorption Behavior of Methylene Blue From Aqueous Solution By Using PVA/SA/Kaolin Composite

2020 ◽  
pp. 199-213
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Metal Ion ◽  
Physical Adsorption ◽  
Thermo Gravimetric Analysis ◽  
Blue Dye ◽  
Sorption Behavior ◽  
Gravimetric Analysis ◽  
Order Kinetic ◽  
Batch Mode

This research shows a method of elimination of methylene blue from aqueous solutions using PVA/SA/Kaolin Composite. The prepared was characterized by Fourier transform infra red spectroscopy (FTIR), X-Ray diffractogram (XRD), Thermo gravimetric analysis (TGA) and Scanning electron microscopic (SEM). Furthermore, the analyses of batch mode experiments were performed to study the experimental important parameters such as pH, metal ion concentrations, adsorbent dosages and contact time are discussed. From the experimental data, the adsorption isotherms are well described by Langmuir and Freundlich model, the adsorption of methyleneblue was fitted with Freundlich isotherm confirms the physical adsorption phenomena involved in this process. The kinetic parameter was correlated with the pseudo-second-order kinetic model. From the results, it was concluded that the material of PVA/SA/Kaolin Composite is an excellent adsorbent for the removal of methylene blue dye from aqueous solution.

scholarly journals Adsorption Study of Cu2+ Ions from Aqueous Solutions by Bael Flowers (Aegle marmelos)

2020 ◽  
Vol 11 (4) ◽  
pp. 11891-11904
Keyword(s):  
Aqueous Solutions ◽  
Adsorption Capacity ◽  
Metal Ion ◽  
Low Cost ◽  
Sem Analysis ◽  
Ion Concentration ◽  
Maximum Adsorption Capacity ◽  
Aegle Marmelos ◽  
Batch Mode ◽  
Initial Ph

In the present study, batch mode adsorption was carried out to investigate the adsorption capacity of dried bael flowers (Aegle marmelos) for the adsorptive removal of Cu(II) ions from aqueous solutions by varying agitation time, initial metal concentration, the dose of adsorbent, temperature, and initial pH of the Cu(II) ion solution. The percentage removal of 98.7% was observed at 50 ppm initial metal ion concentration, 0.5 g/100.00 cm3 adsorbent dosage, within the contact time of 120 minutes at 30 ºC in the pH range of 4 – 7. The sorption processes of Cu(II) ions was best described by pseudo-second-order kinetics. Langmuir isotherm had a good fit with the experimental data with 0.97 of correlation coefficient (R2), and the maximum adsorption capacity obtained was 23.14 mg g-1 at 30 ºC. The results obtained from sorption thermodynamic studies suggested that the adsorption process is exothermic and spontaneous. SEM analysis showed tubular voids on the adsorbent. FTIR studies indicated the presence of functional groups like hydroxyl, –C-O, –C=O, and amide groups in the adsorbent, which can probably involve in metal ion adsorption. Therefore, dried bael flowers can be considered an effective low-cost adsorbent for treating Cu(II) ions.

Swelling and kinetic investigations of basic blue-3 sorption by polyacrylamide/Gum Arabic hybrid hydrogel in aqueous medium

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Uzma ◽  
Sultan Alam ◽  
Hanif Subhan ◽  
Luqman Ali Shah ◽  
Noor Saeed Khattak
Keyword(s):  
Thermo Gravimetric Analysis ◽  
Gum Arabic ◽  
Composite Hydrogel ◽  
Gravimetric Analysis ◽  
Order Kinetic ◽  
One Pot ◽  
Hybrid Hydrogel ◽  
Aquatic Life ◽  
Hybrid Sorbent ◽  
Order Kinetic Model

Abstract Removal of noxious dyes from waste water is highly desirable for the safety of humans, aquatic life and natural environment. The issue was addressed in the present work by one pot fabrication of polyacrylamide/Gum Arabic (pAAm/GA) composite hydrogel which was applied as sorbent for basic blue-3 (BB3) eradication. The synthesis of the material was confirmed by scanning electron microscopy (SEM), Fourier Transformed Infrared (FTIR) spectroscopy and thermo gravimetric analysis (TGA). Besides, the same techniques also evidenced BB3 uptake by the hydrogel. In distilled water, the swelling capacities of the hydrogel was investigated at pH 7 and the nature of water diffusion into the hydrogel was probed from the resultant data. The composite hydrogel reached equilibrium point in 24 h after which no appreciable water absorption occurred. The adsorption of BB3 by the hybrid material was comprehensively investigated which involved the effect of contact time, temperature and pH on the sorption capacity of the hybrid sorbent. The obtained data fitted well into pseudo second order kinetic model and the adsorption took place in three consecutive kinetic phases. Moreover, sorption thermodynamics revealed non spontaneous and endothermic nature of BB3 sorption accompanied with increase in degree of order.

scholarly journals Preparation of grafting copolymer of acrylic acid onto loess surface and its adsorption behavior

2020 ◽  
Vol 82 (4) ◽  
pp. 673-682
Author(s):  
Fengqin Tang ◽  
Di Gao ◽  
Li Wang ◽  
Yufeng He ◽  
Pengfei Song ◽  
...  
Keyword(s):  
Acrylic Acid ◽  
Adsorption Capacity ◽  
Removal Rate ◽  
Vinyl Pyrrolidone ◽  
Mineral Particle ◽  
Gravimetric Analysis ◽  
Order Kinetic ◽  
Experimental Conditions ◽  
Order Kinetic Model ◽  
Grafting Copolymer

Abstract Loess is a typical natural mineral particle distributed widely around the world, and it is inexpensive, readily accessible, and harmless to the environment. In this study, loess was modified by surface grafting copolymerization of functional monomers, such as acrylic acid, N-vinyl pyrrolidone, and N,N-methylenebisacrylamide as a cross-linking agent, which afforded a novel loess-based grafting copolymer (LC-PAVP). After being characterized by scanning electron microscopy, thermal gravimetric analysis and Fourier-transform infrared spectroscopy, its adsorption capacity and mechanism of removing lead ions (Pb2+) were investigated. With the study of the optimal experimental conditions, it was demonstrated that the removal rate of Pb2+ by LC-PAVP can reach up to 99.49% in 60 min at room temperature. It was also found that the kinetic characteristics of the adsorption capacity due to the pseudo-second-order kinetic model and the thermodynamics conformed well with the Freundlich model. In summary, as a lost-cost and eco-friendly loess-based adsorbent, LC-PAVP is a good potential material for wastewater treatment.

Structural and Optical Studies of CdS Nanocomposites Synthesized by Various Routes

2008 ◽  
Vol 8 (8) ◽  
pp. 4188-4192 ◽  
Author(s):  
Gouri Sankar Paul ◽  
Pratima Agarwal
Keyword(s):  
Quantum Confinement Effect ◽  
High Surface ◽  
Aqueous Media ◽  
Thermo Gravimetric Analysis ◽  
Volume Ratio ◽  
Stoichiometric Ratio ◽  
Particle Sizes ◽  
Gravimetric Analysis ◽  
Phonon Modes ◽  
Cds Nanocomposites

Structural and optical properties of CdS nanocomposites prepared by two different routes are presented in this paper. While CdS prepared by aqueous media results in the formation of nanoparticles of particle sizes 8–9 nm; the solvothermal process results in the formation of nanorods of diameter 40–50 nm and length 450–750 nm where particle sizes were confirmed by SEM and TEM. XRD studies confirm that the structure of these nanocomposites is wurzite. EDAX give the stoichiometric ratio. UV-Vis and photoluminescence (PL) measurements show a blue shift compared to bulk CdS, supporting quantum confinement effect. Nanocomposites are found to be stable up to 650 °C was observed by thermo gravimetric analysis (TGA). The Raman scattering studies show that in addition to LO and TO phonon modes, peak corresponding to surface phonon modes are present in both cases, which are due to high surface to volume ratio. The CdS nanocomposites can therefore be used for various stable optoelectronic devices.

Fe3O4-CS-L: a magnetic core-shell nano adsorbent for highly efficient methyl orange adsorption

2017 ◽  
Vol 77 (3) ◽  
pp. 628-637 ◽  
Author(s):  
Shuangzhen Guo ◽  
Jian Zhang ◽  
Xianlong Li ◽  
Fan Zhang ◽  
Xixi Zhu
Keyword(s):  
Methyl Orange ◽  
Adsorption Capacity ◽  
Thermo Gravimetric Analysis ◽  
Kinetic Studies ◽  
Magnetic Core ◽  
Infrared Spectrometry ◽  
Core Shell ◽  
Maximum Adsorption Capacity ◽  
Gravimetric Analysis ◽  
Equilibrium Studies

Abstract A novel core-shell bio-adsorbent was fabricated by using biological materials for removing methyl orange (MO) from aqueous solution. The structure characteristics results of scanning electron microscopy (SEM), Fourier transform infrared spectrometry (FT-IR), thermo-gravimetric analysis (TGA), vibrating sample magnetometer (VSM), and Brunauer–Emmett–Teller (BET) shows that Fe3O4-CS-L has been successfully prepared. The effects of contact time, pH, temperature and initial concentration were explored. The results suggested pH was a negligible factor in adsorption progress. Kinetic studies showed that the experiment data followed pseudo-second-order model. Boyd mode suggested that external mass transfer showed a rather weak rate control for MO adsorption onto Fe3O4-CS-L. Equilibrium studies showed that isotherm data were the best described by Langmuir model. The maximum adsorption capacity of MO estimated to be 338.98 mg/g at 298 K. Moreover, the adsorption capacity of Fe3O4-CS-L can keep about 74% in the fifth adsorption–regeneration cycle. Thus, the Fe3O4-CS-L could be a kind of promising material for removing MO from wastewater.

scholarly journals Sorption Efficiency of a New Sorbent towards Cadmium(II): Methylphosphonic Acid Grafted Polystyrene Resin

2013 ◽  
Vol 2013 ◽  
pp. 1-10 ◽  
Author(s):  
Nacer Ferrah ◽  
Omar Abderrahim ◽  
Mohamed Amine Didi ◽  
Didier Villemin
Keyword(s):  
Metal Ion ◽  
Ph Value ◽  
Ion Concentration ◽  
Methylphosphonic Acid ◽  
Order Kinetic ◽  
Elementary Analysis ◽  
Optimum Ph ◽  
Initial Ph ◽  
Pseudo Second Order ◽  
Polystyrene Resin

A new chelating polymeric sorbent has been developed using polystyrene resin grafted with phosphonic acid. After characterization by FTIR and elementary analysis, the new resin has been investigated in liquid-solid extraction of cadmium(II). The results indicated that phosphonic resin could adsorb Cd(II) ion effectively from aqueous solution. The adsorption was strongly dependent on the pH of the medium and the optimum pH value level for better sorption was between 3.2 and 5.2. The influence of other analytical parameters including contact time, amount of resin, metal ion concentration, and the presence of some electrolytes was investigated. The maximum uptake capacity of Cd(II) ions was 37,9 mg·g−1grafted resin at ambient temperature, at an initial pH value of 5.0. The overall adsorption process was best described by pseudo second-order kinetic. When Freundlich and Langmuir isotherms were tested, the latter had a better fit with the experimental data. Furthermore, more than 92% of Cd(II) could be eluted by using 1.0 mol·L−1HCl in one cycle.

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