Preconcentration and determination of Cu (II) from aqueous samples using functionalized sawdust and comparison with synthetic functionalized sorbents

Shah, Jasmin; Jan, Mohammad Rasul; Sadia, Maria; Haq, Atta ul

doi:10.1007/s11814-012-0193-y

Cited by 7 publications

(6 citation statements)

References 16 publications

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“…In the last decade, agricultural and forestry by-products such as rice husk and rice husk ash, [14][15][16][17] waste tea, 18 wood sawdust (WSD), [19][20][21][22] and so forth 23 have increasingly generated interest in many emerging applications, especially adsorption process. These materials are used in the formulation of composite materials because of their flexibility, abundant availability in nature, biodegradability, variety, low cost, clean, and also environmental friendliness.…”

Section: Introductionmentioning

confidence: 99%

“…In this regards, the use of nanoparticles based on materials such as SiO 2 /Zeolite, 10 graphene oxide, 11 multiwalled carbon nanotubes, 12 and Zeolite A 13 have already been explored in PSf polymeric membranes. Therefore, the application of nanoparticles as an additive in preparation of TFC membrane for desalination has opened a new emerging area of research.In the last decade, agricultural and forestry by-products such as rice husk and rice husk ash, 14-17 waste tea, 18 wood sawdust (WSD), [19][20][21][22] and so forth 23 have increasingly generated interest in many emerging applications, especially adsorption process. These materials are used in the formulation of composite materials because of their flexibility, abundant availability in nature, biodegradability, variety, low cost, clean, and also environmental friendliness.…”

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confidence: 99%

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Performance enhancement of thin‐film composite membranes in water desalination process by wood sawdust

Namaghi

Asl

Chenar

et al. 2019

Polymers for Advanced Techs

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In this study, polysulfone/wood sawdust (PSf/WSD) mixed matrix membrane (MMM) was prepared as a novel substrate layer of thin‐film composite (TFC) membrane in water desalination. The main aim was to evaluate how different amounts of WSD (0‐5 wt%) and PSf concentrations (12‐16 wt%) in the porous substrate affect the properties of the final TFC membranes in the separation of organic and inorganic compounds. Morphological and wettability studies demonstrated that the addition of small amount of WSD (less than or equal to 1 wt%) in the casting solution resulted in more porous but similar hydrophobic substrates, while high loading (greater than or equal to 2 wt%) of WSD not only changed the substrate wettability and morphology but also increased and decreased the swelling and mechanical properties of substrate layer. Therefore, PA layer formed thereon displayed extensively varying film morphology, interfacial properties, and separation performance. Based on approximately stable permeate flux (ASPF) and apparent salt rejection efficiency (ASRE), the best TFC membrane was prepared over the substrate with 12 to 14 wt% of PSf and around 0.5 to 1 wt% of WSD. Although notable improvements in permeate flux were obtained by adding a small amount of sawdust, the results clearly indicate that the salt rejection mechanism of TFC membrane was different from the glycerin rejection mechanism. Furthermore, durability results of TFC membranes showed that in continuous operation for 30 days, TFC‐14/0.5 and TFC‐14/01 have the maximum plateau levels of stable permeate flux and salt rejection among the all TFC membranes.

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Section: Introductionmentioning

confidence: 99%

mentioning

confidence: 99%

Performance enhancement of thin‐film composite membranes in water desalination process by wood sawdust

Namaghi

Asl

Chenar

et al. 2019

Polymers for Advanced Techs

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“…The four most common kinetic models (pseudo‐first‐order, pseudo‐second‐order, Elovich kinetic and intraparticle diffusion) were used to describe the adsorption of aniline, N , N ‐dimethylaniline and N , N ‐diethylaniline onto the MCGO composite. Equations (5)–(7) were used for the pseudo‐first‐order, pseudo‐second‐order and Elovich models, respectively 26 :

\ln (q_{normale} - q_{t}) = \ln q_{normale} - K_{1} t

\frac{t}{q_{t}} = \frac{1}{K_{2} q_{normale}^{2}} + \frac{t}{q_{t}}

q_{t} = \frac{1}{β} \ln (italicαβ) + \frac{1}{β} \ln (t)

In the above equations, q e represents the adsorbate amount (mg g −1 ) adsorbed at equilibrium, q t is this amount at any time t , while K 1 (min −1 ) and K 2 (mg −1 min −1 ) are rate constants for pseudo‐first‐order and pseudo‐second‐order kinetic models, respectively. Parameters α and β are known as the Elovich coefficients, where α represents the initial adsorption rate (mg g −1 min −1 ) and β is related to the extent of surface coverage and activation energy for chemisorption (g min −1 ).…”

Section: Resultsmentioning

confidence: 99%

“…The four most common kinetic models (pseudo-first-order, pseudo-second-order, Elovich kinetic and intraparticle diffusion) were used to describe the adsorption of aniline, N,N-dimethylaniline and N,N-diethylaniline onto the MCGO composite. Equations ( 5)- (7) were used for the pseudo-first-order, pseudo-second-order and Elovich models, respectively 26 :…”

Section: Effect Of Contact Time and Kinetic Studymentioning

confidence: 99%

Biopolymer magnetic chitosan–graphene oxide composite for removal and extraction of aromatic amines from aqueous samples

Zeb

Shah

Jan

2022

J of Chemical Tech & Biotech

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BACKGROUND Magnetic chitosan was crosslinked with graphene oxide and a magnetic chitosan–graphene oxide composite was synthesized and characterized. The composite was used for the removal and extraction of aromatic amines like aniline, N,N‐dimethylaniline and N,N‐diethylaniline. RESULTS Experimental factors affecting the adsorption process such as solution pH, time of contact, amount of adsorbent, initial concentration of analyte and temperature of solution were studied. The maximum adsorption capacity was found to be 7.55 mg g−1 for aniline, 6.96 mg g−1 for N,N‐dimethylaniline and 6.86 mg g−1 for N,N‐diethylaniline using pH 7 at room temperature. Kinetic and adsorption isotherm models were applied to the data which showed the best fit of experimental data to pseudo‐second‐order kinetic model and Langmuir isotherm for all three analytes. CONCLUSIONS The adsorption process was found to be spontaneous and exothermic as revealed by thermodynamic study. The maximum recoveries for aniline, N,N‐dimethylaniline and N,N‐diethylaniline were 98.56%, 97.05% and 95.26%, respectively. Successful application of the adsorbent was found for spiked aqueous samples. © 2022 Society of Chemical Industry (SCI).

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“…In order to achieve environmental decontamination, several techniques such as adsorption, precipitation, ion exchange, reverse osmosis, membrane filtration and solvent extraction are used (Ivanov et al 2004;El-Nadi 2007;Chen et al 2009;Chen et al 2010;El-Hefny, El-Nadi, and Ahmed 2011;Shah et al 2013;. Among these, adsorption is a classical but efficient technique for removing the toxic metal ions.…”

Section: Introductionmentioning

confidence: 99%

Kinetic sorption study of Cerium (IV) on magnetite nanoparticles

Ahmed

Gamal

Abo-El-Enein

et al. 2016

Particulate Science and Technology

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Magnetite nanoparticles (Fe3O4) and humic acid coated magnetite nanoparticles (Fe3O4/HA) were prepared by co-precipitation method for cerium ions removal from aqueous solution. The success of preparation in nanoscale was confirmed by XRD and TEM. The TEM image shows that the size of Fe3O4 is around 15 nm and the presence of humic acid reduces the magnetite aggregation and stabilizes the magnetite suspension. Adsorption studies with respect to various process variables Downloaded by [New York University] at 23:16 17 June 2016 2 such as contact time, pH and temperature were investigated by batch technique. The sorption kinetics and isotherms of Fe3O4 and Fe3O4/HA for Ce (IV) ions show that the sorption kinetics follow the pseudo-second-order and Langmuir isotherm model for both sorbents. The maximum capacity (Qmax) of Ce (IV) onto Fe3O4 and Fe3O4/HA were found to be 160, 280 mg/g, respectively. The thermodynamic parameters (∆G o , ∆H o and ∆S o ) were calculated, and the results revealed that the sorption process of Ce (IV) ions on both Fe3O4 and Fe3O4 /HA are spontaneous, endothermic for Fe3O4 and exothermic for Fe3O4/HA.

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Preconcentration and determination of Cu (II) from aqueous samples using functionalized sawdust and comparison with synthetic functionalized sorbents

Cited by 7 publications

References 16 publications

Performance enhancement of thin‐film composite membranes in water desalination process by wood sawdust

Performance enhancement of thin‐film composite membranes in water desalination process by wood sawdust

Biopolymer magnetic chitosan–graphene oxide composite for removal and extraction of aromatic amines from aqueous samples

Kinetic sorption study of Cerium (IV) on magnetite nanoparticles

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