Remediation and recovery of methyl orange from aqueous solution onto acrylic acid grafted Ficus carica fiber: Isotherms, kinetics and thermodynamics

Gupta, Vinod Kumar; Pathania, Deepak; Sharma, Shikha; Agarwal, Shilpi; Singh, Prerna

doi:10.1016/j.molliq.2012.10.007

Cited by 82 publications

(19 citation statements)

References 52 publications

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“…Activated carbon (AC) remains a popular adsorbent having numerous potentials for dye removal from wastewater but the cost of purchasing commercial activated carbon (CAC) limited its uses in the past years [47][48][49][50] . As a result of this high cost, scientists all over the globe are searching for suitable alternatives to CAC, such as agricultural materials due to their high efficiency [4] .…”

Section: Rationalementioning

confidence: 99%

Sorption studies of methyl red dye removal using lemon grass (Cymbopogon citratus)

Ahmad

Ahmed

Adegoke

et al. 2019

Chemical Data Collections

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Lemongrass leaf based activated carbon (LGLAC) was prepared using physico-chemical methods for methyl red (MR) dye removal from aqueous solutions. The surface chemistry of LGLAC before adsorption revealed the presence of different functional groups: O-H, C-H, C = O, CH 3 , C = C, NO , CO and C-N which were shifted after methyl red dye adsorption. Brunauer-Emmett-Teller surface and mesopore areas are 836.04 m 2 /g and 598.6 04 m 2 /g, whereas, the average pore diameter and total pore volume of LGLAC are 3.62 nm and 0.472 cm 3 /g respectively. Batch adsorption was studied using different parameters: initial dye concentrations (25-500 mg/L), contact time (0-24 h), solution temperature (30-60 °C) and solution pH (2-12). Adsorption of methyl red dye was observed to increase with increase in initial dye concentration, contact time and solution temperature. The methyl red dye adsorption uptake and percentage removal at equilibrium showed that the adsorption process is majorly dependent on the initial dye concentration. Optimum percentage of methyl red dye removed was observed at pH 2. The adsorption process of methyl red dye onto LGLAC was endothermic in nature. Thermodynamic parameters, including entropy change (S 0), enthalpy change (H 0), and Gibbs free energy change (G 0) were evaluated. The adsorption process was endothermic and the mechanism followed a physisorption process.

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Section: Rationalementioning

confidence: 99%

Sorption studies of methyl red dye removal using lemon grass (Cymbopogon citratus)

Ahmad

Ahmed

Adegoke

et al. 2019

Chemical Data Collections

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“…Many physiochemical methods like coagulation, flocculation, ion exchange, membrane separation, photodegradation, electrochemical oxidation etc. have been used for the treatment of contaminated water (Bhattacharyya and Sharma, 2005; Wang and Zhu, 2007; Gupta et al, 2013b,c, 2014; Pathania and Rathore, 2014). Among these methods, adsorption is known to be efficient, and is widely used in wastewater treatment because of its simplicity, economic viability, technical feasibility, and social acceptability.…”

Section: Introductionmentioning

confidence: 99%

Microwave induced synthesis of graft copolymer of binary vinyl monomer mixtures onto delignified Grewia optiva fiber: application in dye removal

et al. 2014

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Grafting method, through microwave radiation technique is very effective in terms of time consumption, cost effectiveness and environmental friendliness. Via this method, delignified Grewia optiva identified as a waste biomass, was graft copolymerized with methylmethacrylate (MMA) as an principal monomer in a binary mixture of ethyl methacrylate (EMA) and ethyl acrylate (EA) under microwave irradiation (MWR) using ascorbic acid/H2O2 as an initiator system. The concentration of the comonomer was optimized to maximize the graft yield with respect to the primary monomer. Maximum graft yield (86.32%) was found for dGo-poly(MMA-co-EA) binary mixture as compared to other synthesized copolymer. The experimental results inferred that the optimal concentrations for the comonomers to the optimized primary monomer was observed to be 3.19 mol/L × 10−1 for EMA and 2.76 mol/L × 10−1 for EA. Delignified and graft copolymerized fiber were subjected to evaluation of physicochemical properties such as swelling behavior and chemical resistance. The synthesized graft copolymers were characterized with Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA) and X-ray diffraction techniques. Thermal stability of dGo-poly(MMA-co-EA) was found to be more as compared to the delignified Grewia optiva fiber and other graft copolymers. Although the grafting technique was found to decrease percentage crystallinity and crystallinity index among the graft copolymers but there was significant increase in their acid/base and thermal resistance properties. The grafted samples have been explored for the adsorption of hazardous methylene dye from aqueous system.

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“…The intraparticle diffusion model was also employed to study the diffusion mechanism for adsorbate/adsorbent interaction, see Equation (4) [ 36 ]:

where k d is the intraparticle diffusion rate constant.…”

Section: Resultsmentioning

confidence: 99%

Nanocellulose from Cotton Waste and Its Glycidyl Methacrylate Grafting and Allylation: Synthesis, Characterization and Adsorption Properties

et al. 2021

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Nanocellulose (NC) is getting ahead as a renewable, biodegradable and biocompatible biomaterial. The NCs for this study were recovered from industrial cotton waste (CFT) by acid hydrolysis (HNC) and by 2,2,6,6-tetramethylpiperidine-1-oxyl (TEMPO) mediated oxidation (ONC). They were functionalized by radical based glycidyl methacrylate (GMA) grafting providing crystalline HNC-GMA and ONC-GMA, and by allylation (ALL) providing amorphous HNC-ALL and ONC-ALL. HNC, ONC and their derivatives were chemically and morphologically characterized. Crystalline NCs were found capable to adsorb, from diluted water solution (2 × 10−3 M), the antibiotics vancomycin (VC), ciprofloxacin (CP), amoxicillin (AM) and the disinfectant chlorhexidine (CHX), while amorphous NCs did not show any significant adsorption properties. Adsorption capability was quantified by measuring the concentration change in function of the contact time. The adsorption kinetics follow the pseudo-second order model and show complex adsorption mechanisms investigated by an intraparticle diffusion model and interpreted by structure-property relationships. ONC and ONC-GMA loaded with VC, and HNC and HNC-GMA loaded with CP were not colonized by Staphylococcus aureus and by Klebsiella pneumonia and suggested long lasting release capability. Our results can envisage developing CFT derived NCs for environmental applications (water remediation) and for biomedical applications (antibacterial NC). Among the future developments, it could also be of interest to take advantage of acidic, glycidyl and allyl groups’ reactivity to provide other NCs from the NC object of this study.

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Remediation and recovery of methyl orange from aqueous solution onto acrylic acid grafted Ficus carica fiber: Isotherms, kinetics and thermodynamics

Cited by 82 publications

References 52 publications

Sorption studies of methyl red dye removal using lemon grass (Cymbopogon citratus)

Sorption studies of methyl red dye removal using lemon grass (Cymbopogon citratus)

Microwave induced synthesis of graft copolymer of binary vinyl monomer mixtures onto delignified Grewia optiva fiber: application in dye removal

Nanocellulose from Cotton Waste and Its Glycidyl Methacrylate Grafting and Allylation: Synthesis, Characterization and Adsorption Properties

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