Preconcentration and Immobilization of Phosphate from Aqueous Solutions in Environmental Cleanup by a New Bio-based Anion Exchanger

Marković-Nikolić, Dragana; Bojić, Aleksandar; Bojić, Danijela V.; Cvetković, Dragan; Cakić, Milorad D.; Nikolić, Goran

doi:10.1007/s12649-018-0401-z

Cited by 6 publications

(9 citation statements)

References 35 publications

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“…On the other hand, these results validate the superiority of LGS biomass, or LVAT precursors, for cationic modification compared to numerous agricultural by-products, as well as commercial anion exchanger resins (e.g. QA52 -quaternary ammonium cellulose) tested for anionic species removal (primarily phosphate and nitrate) from aqueous solutions [48].…”

Section: Characterization Of Synthesized Cationic Sorbentssupporting

confidence: 59%

“…However, it should be noted that these bands, together with a deformation vibration band of OH group (in plane) at 1423 cm -1 and a wide band of the vibration of the cellulose ester group at 1260 cm -1 , are correlated with the crystalline cellulose structure [43]. Thus, the apparently small changes in band intensity indicate a 8(2) (2019) [46][47][48][49][50][51][52][53][54][55][56][57] proportional change in the fraction of the crystalline to amorphous form of certain cellulose areas in the treated sample, which favors more efficient sorbent synthesis based on this precursor.…”

Section: (2) (2019) 46-57mentioning

confidence: 99%

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Development and characterisation of miscellaneous cationic sorbents based on lignocellulosic gourd shell

Nikolić¹,

Marković-Nikolić²,

Kostic³

et al. 2019

Adv Techol

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The aim of this study is to develop miscellaneous cationic sorbents based on the lignocellulosic biomass of Lagenaria vulgaris fruit, with the property of efficient sorption of anionic pollutants from aqueous solutions. The lignocellulosic gourd shell (LGS biomass), as a potentially valuable agro-waste, was examined and used for the synthesis of sorbents. The preparation of synthesis precursor (LVAT) was performed by alkaline pretreatment of LGS biomass. Pretreatment under weak alkaline conditions with green carbonate solution was carried out for partial delignification and extraction of depolymerized hemicellulose, thereby achieving higher material porosity and activation of cellulose microfibrils. This activation involves the translation of available-OH functional groups into-ONa form (alkali-cellulose), while maintaining the initial biomass composition. Synthesis of the cationic sorbents was performed in three ways. Different N-reagents, such as tertiary amino and quaternary ammonium compounds, were used in the cation modification of LGS biomass and LVAT precursor, to determine the effects of reagent structure and hydrophobicity on the synthesis outcome, and primarily on the sorption properties of the resulting sorbents. The synthesized cationic sorbents were characterized by physico-chemical methods and tested for the removal of anionic pollutants from water, especially phosphates and nitrates. The various chemical modifications of lignocellulosic biomass provide a scientific contribution to a better understanding of the mechanism of anions sorption on the sorbent surface.

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Section: Characterization Of Synthesized Cationic Sorbentssupporting

confidence: 59%

Section: (2) (2019) 46-57mentioning

confidence: 99%

Development and characterisation of miscellaneous cationic sorbents based on lignocellulosic gourd shell

Nikolić¹,

Marković-Nikolić²,

Kostic³

et al. 2019

Adv Techol

Self Cite

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“…In addition to elemental analysis, reaction efficiency (RE) analysis was performed to assess added functional groups in the sorbent during the modification process. 7 Table 1 shows the elemental compositions and the amount of nitrogen added (N add ). It was found that the H/C ratio of 0.13 was retained in the QABG sorbent.…”

Section: Resultsmentioning

confidence: 99%

“…A barrier to the reactivity of biomass with the reactant can be the variation of bulk density as a function of biomass composition. 7,19…”

Section: Resultsmentioning

confidence: 99%

“…These peaks are used for the detection of structural changes during chemical modification of raw LVS biomass. 7 The decrease in band intensity and shifting of their positions typical for C=O and C–OH groups may be due to the breakdown of the lignocellulosic structure and the reaction of glucopyranose units with CHTAC. 21 Most importantly, the FTIR spectrum of QABG (Figure 1(b)) shows the emergence of a new weak band at 1490 cm −1 , corresponding to the C–H bending vibration from quaternary –N + –(CH 3 ) 3 groups.…”

Section: Resultsmentioning

confidence: 99%

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Kinetics, thermodynamics and mechanisms of phosphate sorption onto bottle gourd biomass modified by (3-chloro-2-hydroxypropyl) trimethylammonium chloride

Marković-Nikolić¹,

Cakić

Petković³

et al. 2019

Progress in Reaction Kinetics and Mechanism

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The sorption kinetics and thermodynamic parameters of phosphate removal from aqueous solution using quaternary ammonium–modified bottle gourd biomass as a sorbent were studied in a batch reactor. The cationic sorbent, containing trimethylammonium and hydroxypropyl groups, was obtained through the chemical reactions of the lignocellulosic Lagenaria vulgaris shell with (3-chloro-2-hydroxypropyl)trimethylammonium chloride. Experimental data of phosphate sorption from aqueous solutions of different initial concentrations (5–140 mg P L−1) have been analysed by reaction kinetics and diffusion models. The characteristic rate constants calculated by linear and non-linear regression analyses of the experimental results are presented. The phosphate sorption reaches equilibrium in 20–30 min, depending on the initial phosphate concentration. The maximum sorption capacity of quaternary ammonium–modified bottle gourd (QABG) sorbent was 18 mg P g−1 at 20 oC. The sorption system is best described by a non-linear equation of the pseudo first-order model ( R2 > 0.996). The Weber–Morris model indicated that the sorption process took place in three steps, whereby the intra-particle diffusion is not the only rate-controlling step. In addition, the effect of temperature (20 oC–50 oC) on sorption kinetics was also investigated. The various thermodynamic parameters suggest that phosphate sorption is favoured and is an exothermic process. The activation energy and the sticking probability confirmed that anion exchange is the dominant mechanism. These results provide valuable information for the potential use of agricultural residues in the treatment of wastewaters.

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Nitrate Removal by Sorbent Derived from Waste Lignocellulosic Biomass of Lagenaria vulgaris: Kinetics, Equilibrium and Thermodynamics

et al. 2021

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Preconcentration and Immobilization of Phosphate from Aqueous Solutions in Environmental Cleanup by a New Bio-based Anion Exchanger

Cited by 6 publications

References 35 publications

Development and characterisation of miscellaneous cationic sorbents based on lignocellulosic gourd shell

Development and characterisation of miscellaneous cationic sorbents based on lignocellulosic gourd shell

Kinetics, thermodynamics and mechanisms of phosphate sorption onto bottle gourd biomass modified by (3-chloro-2-hydroxypropyl) trimethylammonium chloride

Nitrate Removal by Sorbent Derived from Waste Lignocellulosic Biomass of Lagenaria vulgaris: Kinetics, Equilibrium and Thermodynamics

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