Thermodynamic aspects of sorption of Fe2+ onto unbleached kraft fibres

Chia, Chin Hua; Duong, Tuan D; Nguyen, Kien Loi; Zakaria, Sarani

doi:10.1016/j.jcis.2006.11.037

Cited by 12 publications

(4 citation statements)

References 27 publications

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“…This indicates that CPX adsorption is a spontaneous process favored by increasing temperature. The positive ∆S • confirmed the increased randomness at the solid-solution interface during the removal process [42]. The positive ∆H • indicates that the adsorption is endothermic in nature and that it is more favorable at higher temperatures.…”

Section: Isotherm Studiesmentioning

confidence: 66%

Evaluating the Removal of the Antibiotic Cephalexin from Aqueous Solutions Using an Adsorbent Obtained from Palm Oil Fiber

et al. 2021

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This study aimed to understand the adsorption process of cephalexin (CPX) from aqueous solution by a biochar produced from the fiber residue of palm oil. Scanning electron microscopy, Fourier transform infrared spectroscopy, Boehm titration, and the point of zero charge were used to characterize the morphology and surface functional groups of the adsorbent. Batch tests were carried out to evaluate the effects of the solution pH, temperature, and antibiotic structure. The adsorption behavior followed the Langmuir model and pseudo-second-order model with a maximum CPX adsorption capacity of 57.47 mg g−1. Tests on the thermodynamic behavior suggested that chemisorption occurs with an activation energy of 91.6 kJ mol−1 through a spontaneous endothermic process. Electrostatic interactions and hydrogen bonding represent the most likely adsorption mechanisms, although π–π interactions also appear to contribute. Finally, the CPX removal efficiency of the adsorbent was evaluated for synthetic matrices of municipal wastewater and urine. Promising results were obtained, indicating that this adsorbent can potentially be applied to purifying wastewater that contains trace antibiotics.

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Section: Isotherm Studiesmentioning

confidence: 66%

Evaluating the Removal of the Antibiotic Cephalexin from Aqueous Solutions Using an Adsorbent Obtained from Palm Oil Fiber

et al. 2021

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“…The increasing positive Δ S ° (23.444J mol −1 K −1 ) during the adsorption confirmed the randomness on solid‐solution interface. Similarly, the affinity of lead‐biosorbent increased with the increase of entropy .…”

Section: Resultsmentioning

confidence: 95%

Biosorption of Pb²⁺ from aqueous solution by rice straw modified with citric acid

Guo

Liang

Wang

et al. 2015

Env Prog and Sustain Energy

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The rice straw, an enormous agricultural waste after harvest, was converted into biosorbent by using citric acid and sodium hydroxide for promoting its absorbability. The citric acid‐modified rice straw (CRS) was oriented to the potential utilization of removing Pb2+ from aqueous solution. The Langmuir and Dubinin‐Radushkevich isotherm models were more appropriate to describe the Pb2+ biosorption process. Zeta electric potential tests, FTIR, SEM, and XRD could characterize the physical‐chemical and morphological‐structural features of the biosorbent. Further analyses indicated that a great deal of negative charges, reactive functional groups and exchangeable ions which were introduced on the surface of adsorbent. The analyses of adsorption isotherm and thermodynamics revealed that the monolayer chemical adsorption accompanied ion‐exchange process might be the mechanism of the adsorption behaviors. The utilization of CRS might be a reasonable method for removal lead from wastewater. © 2015 American Institute of Chemical Engineers Environ Prog, 35: 359–367, 2016

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“…After the pulp was prepared, then the magnetic material which is ferrite magnet powder was put into the pulp prepare. This process is called the lumen loading process [8]. Filler suspension will be prepared by dispersing 7.5g of-magnetic pigment ferrite in 250ml of distilled water containing laboratory mechanical stirrer.…”

Section: Preparation Of Magnetic Paper With Sugarcanementioning

confidence: 99%

Effect of Ferrite as Filler in Sugarcane Bagasse Paper via Irradiation Method

Azmi

Othman

2022

KEM

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Deforestation issues increased dramatically every year specially to produce paper. Therefore, to supplement the limited wood fibre resources, non-wood fibres especially sugarcane bagasse introduced an alternatives resolve for raw material is considered in paper-based industries. This study addresses the analysis of magnetic sugarcane bagasse materials as substitute fibres in papermaking. Paper is generally made with cellulose fibre which has some specific features used for educational, packaging, and cleaning purposes. Sugarcane bagasse (Saccarhumofficinarum) is popular for its cellulose, holocellulose, and lignin that far more convenient than wood fibres. Meanwhile, the demands of magnetic material in magnetic papermaking industry has increased due to its excellent mechanical characteristics. As the magnetic paper shows some superiority in properties such as renewable use and folding resistance. The used of filler in this study is to alter the properties such as texture, opacity, brightness, dimensional stability, and overall printability. Thus, the used of ferrite (Fe) magnet as a filler can enhance the paper properties. Ferrite is recognized as a hard-magnetic material with distinct properties such as good mechanical hardness and chemical stability, therefore it is a much more convenient material for magnetic paper production. Through the observation under Scanning Electron Microscope (SEM), the image obtained shows that magnetics sugarcane bagasse paper was more convenient to be used as an alternative for paper making. Next, Fourier-Transform Infrared Spectroscopy (FTIR) recognizes the presence of a functional group of the magnetics sugarcane bagasse paper. Moreover, the chemical properties obtained from this study show that the magnetics sugarcane bagasse was as good as the commercial paper available in the industries. To increase the integrity of the paper, the radiation process by using gamma-ray was done to the paper to see the different for pre and post radiation.

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Thermodynamic aspects of sorption of Fe2+ onto unbleached kraft fibres

Cited by 12 publications

References 27 publications

Evaluating the Removal of the Antibiotic Cephalexin from Aqueous Solutions Using an Adsorbent Obtained from Palm Oil Fiber

Evaluating the Removal of the Antibiotic Cephalexin from Aqueous Solutions Using an Adsorbent Obtained from Palm Oil Fiber

Biosorption of Pb²⁺ from aqueous solution by rice straw modified with citric acid

Effect of Ferrite as Filler in Sugarcane Bagasse Paper via Irradiation Method

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Thermodynamic aspects of sorption of Fe2+ onto unbleached kraft fibres

Cited by 12 publications

References 27 publications

Evaluating the Removal of the Antibiotic Cephalexin from Aqueous Solutions Using an Adsorbent Obtained from Palm Oil Fiber

Evaluating the Removal of the Antibiotic Cephalexin from Aqueous Solutions Using an Adsorbent Obtained from Palm Oil Fiber

Biosorption of Pb2+ from aqueous solution by rice straw modified with citric acid

Effect of Ferrite as Filler in Sugarcane Bagasse Paper via Irradiation Method

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Product

Resources

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Biosorption of Pb²⁺ from aqueous solution by rice straw modified with citric acid