Sorption of Ni(II), Pb(II) and Cu(II) ions from aqueous solutions by cellulose grafted with poly(HEMA-co-AAc): Kinetic, isotherm and thermodynamic study

Kumar, Rajesh; Sharma, Rajeev Kr.; Singh, Anirudh P.

doi:10.1016/j.jece.2019.103088

Cited by 24 publications

(13 citation statements)

References 75 publications

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“…Due to the low adsorption efficiency of the hydroxyl group of the extracted cellulose, this group must be modified before it can be used in practice. Examples of functional groups bonded to extracted cellulose to increase its adsorption efficiency include carboxyl, amidoxime, , amide, ethylenediaminetetraacetic acid (EDTA), , sulfur as an anionic ligand, and triethylenetetramine. , Common metal ions that are studied include Pb, Cd, Cu, Zn, and Ni. ,,,− It was found that the adsorption efficiencies of these modified celluloses were clearly higher than those of the unmodified cellulose.…”

Section: Introductionmentioning

confidence: 99%

Removal of Heavy Metal Ions Using Modified Celluloses Prepared from Pineapple Leaf Fiber

et al. 2020

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Since large amounts of pineapple leaves are abandoned after harvest in agricultural areas, the possibility of developing value-added products from them is of interest. In this work, cellulose fiber was extracted from pineapple leaves and modified with ethylenediaminetetraacetic acid (EDTA) and carboxymethyl (CM) groups to produce Cell-EDTA and Cell-CM, respectively, which were then used as heavy metal ion adsorbents. A solution of either lead ion (Pb 2+ ) or cadmium ion (Cd 2+ ) was used as wastewater for the purpose of studying adsorption efficiencies. The adsorption efficiencies of Cell-EDTA and Cell-CM were significantly higher than those of the unmodified cellulose in the pH range 1−7. Maximum adsorptions toward Pb 2+ and Cd 2+ were, for Cell-EDTA, 41.2 and 33.2 mg g −1 , respectively, and, for Cell-CM, 63.4 and 23.0 mg g −1 , respectively. The adsorption behaviors of Cell-CM for Pb 2+ and Cd 2+ fitted well with a pseudo-first-order model, but those of Cell-EDTA for Pb 2+ and Cd 2+ fitted well with a pseudo-second-order model. All of the adsorption behaviors could be described using the Langmuir adsorption isotherm. Desorption studies of Pb 2+ and Cd 2+ on both adsorbents using 1 M HCl suggested that regenerability of Cell-EDTA was, for both adsorbates, better than that of Cell-CM. Moreover, adsorption measurements in a mixture of Pb 2+ and Cd 2+ at various ratios showed that for both adsorbents the adsorption of Pb 2+ was higher than that of Cd 2+ , while the adsorption selectivity for Pb 2+ of Cell-CM was greater than that of Cell-EDTA. This study showed that the modified cellulosic adsorbents made from pineapple leaves were able to efficiently adsorb metal ions.

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Section: Introductionmentioning

confidence: 99%

Removal of Heavy Metal Ions Using Modified Celluloses Prepared from Pineapple Leaf Fiber

et al. 2020

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“…0.1 g of the RDSA hydrogel film was taken in 30 mL of variable metal ion concentrations (1–4 mg/L for copper nitrate, 1–5 mg/L nickel nitrate). The basic approaches usually favorable to adsorption include Langmuir and Freundlich adsorption isotherms . In addition, two models were also studied: Temkin and Flory–Huggins.…”

Section: Resultsmentioning

confidence: 99%

“…The effect of concentration change on detoxification efficiency was studied, and maximum adsorption was found to be at maximum copper or nickel ion concentration. The higher the concentration of metal ion for a fixed number of adsorbent sites, the greater the number of sites occupied by metal ion, and hence, the detoxification percentage observed was higher . First-order and second-order kinetics are the most studied models.…”

Section: Resultsmentioning

confidence: 99%

“…The higher the concentration of metal ion for a fixed number of adsorbent sites, the greater the number of sites occupied by metal ion, and hence, the detoxification percentage observed was higher. 45 First-order and secondorder kinetics are the most studied models. In addition, we have also plotted graphs for the intraparticle diffusion model and the Elovich model (eqs 12−15).…”

Section: Sensing Toxic Metalmentioning

confidence: 89%

“…The basic approaches usually favorable to adsorption include Langmuir and Freundlich adsorption isotherms. 45 In addition, two models were also studied: Temkin and Flory−Huggins. The following eqs (eq 8−11) are graphically studied to check which plot is most linear and hence, being followed.…”

Section: Sensing Toxic Metalmentioning

confidence: 99%

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Riboflavin Functionalized Dextrin-Sodium Alginate Based Fluorescent Sensor: Detoxification of Cu²⁺ and Ni²⁺ Ions

Sharma

Priya

Kaith

et al. 2019

ACS Appl. Polym. Mater.

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The research work performed and described here is in regard to synthesis of dextrin-sodium alginate based hybrid hydrogel film. It showed the maximized percentage swelling at 1145% after optimization of all reaction parameters. It was further functionalized with a fluorophore, i.e., riboflavin, to introduce luminescent behavior to the film. The RDSA film can not only remove but also sense the copper and nickel ions in the surroundings very sensitively up to 0.4445 μM and 0.2571 μM, respectively, which is in the desired range of EPA limits. The RDSA film could detoxify the 5 μM copper and nickel ion concentrated solution to an extent of 95.54% and 91.30%, respectively. The adsorption followed the Flory–Huggins model along with second-order kinetics specifically for higher metal ion concentrations. The detection and adsorption occur as a result of complex formation between the film and metal ion. The intraparticle diffusion mechanism is of two steps and occurs through the outer surface to the inner pores. The ions can also be desorbed with EDTA to reuse the film for further recovery of the metal ions. It can be done for multiple cycles, and finally the film can be degraded biologically when it is of no use. It is due to natural materials being used for the synthesis.

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Bio-based activated carbon for Cu(II), Ni(II), and Pb(II) ions aqueous sequestration: physiochemical characterization, isotherms, and kinetics

Imran-Shaukat,

Wahi,

Ngaini

2024

Int. J. Environ. Sci. Technol.

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Sorption of Ni(II), Pb(II) and Cu(II) ions from aqueous solutions by cellulose grafted with poly(HEMA-co-AAc): Kinetic, isotherm and thermodynamic study

Cited by 24 publications

References 75 publications

Removal of Heavy Metal Ions Using Modified Celluloses Prepared from Pineapple Leaf Fiber

Removal of Heavy Metal Ions Using Modified Celluloses Prepared from Pineapple Leaf Fiber

Riboflavin Functionalized Dextrin-Sodium Alginate Based Fluorescent Sensor: Detoxification of Cu²⁺ and Ni²⁺ Ions

Bio-based activated carbon for Cu(II), Ni(II), and Pb(II) ions aqueous sequestration: physiochemical characterization, isotherms, and kinetics

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Sorption of Ni(II), Pb(II) and Cu(II) ions from aqueous solutions by cellulose grafted with poly(HEMA-co-AAc): Kinetic, isotherm and thermodynamic study

Cited by 24 publications

References 75 publications

Removal of Heavy Metal Ions Using Modified Celluloses Prepared from Pineapple Leaf Fiber

Removal of Heavy Metal Ions Using Modified Celluloses Prepared from Pineapple Leaf Fiber

Riboflavin Functionalized Dextrin-Sodium Alginate Based Fluorescent Sensor: Detoxification of Cu2+ and Ni2+ Ions

Bio-based activated carbon for Cu(II), Ni(II), and Pb(II) ions aqueous sequestration: physiochemical characterization, isotherms, and kinetics

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Product

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Riboflavin Functionalized Dextrin-Sodium Alginate Based Fluorescent Sensor: Detoxification of Cu²⁺ and Ni²⁺ Ions