Adsorption kinetics of Cr(VI) ions onto biochar from brewer’s spent grain

Kukić, Dragana V.; Vasic, M Vesna; Panić, Sanja; Radosavljevic, S Milos; Sciban, B Marina; Prodanović, Maša; Blagojev, T Nevena; Pejin, Dušanka J.

doi:10.2298/apt1950134k

Cited by 4 publications

(4 citation statements)

References 23 publications

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“…Ca 2+ , as a divalent cation, was removed from the alkalized juice in a greater amount (30.2 %) than monovalent cations: Na + (11.0 %) and K + (9.3 %), all after 90 min. Kukić et al obtained similar results regarding reaching equilibrium after 90 min in the study of removing Cr (VI) onto activated and non-activated biochar from brewer's spent grain [29]. Successful adsorption of the brewer's spent grain can be attributed to high adsorption capacity of the biosorbent and at the same time high specific area.…”

Section: Sbp Removal Efficiency and Kinetic Studymentioning

confidence: 75%

“…where y is amount of adsorbed metals at exact time (mg g −1 ); q e is amount of adsorbate in solution at equilibrium (mg g −1 ); k 2 is second-order rate constant (g mg min −1 ); t is biosorption time (min) [28,29]. The Elovich model of adsorption behavior could be calculated according to equation:…”

Section: Kinetic Modelsmentioning

confidence: 99%

“…Two steps are related to the dissociation of the metal ions from the solution and attaching metal ions onto biosorbent. The first segregate phase is attributed to the diffusion of adsorbate through liquid and surface binding on the biosorbent and represents external surface adsorption, while the second phase is attributed to the equilibrium of the biosorption process onto SBP [29].…”

Section: Sbp Removal Efficiency and Kinetic Studymentioning

confidence: 99%

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Utilization of Sugar Beet Pulp as Biosorbent for Molassigenic Metal Ions: Kinetic Study of Batch Biosorption

Tukuljac

Krulj²,

Pezo³

et al. 2022

Period. Polytech. Chem. Eng.

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The sugar industry is facing problems with high amount of molassigenic metal ions remained after the purification step in sugar juice. In this investigation the application of unmodified sugar beet pulp as a weak monofunctional cation-exchange biosorbent for molassigenic metal ions (Na+, K+ and Ca2+) removal from the alkalized sugar juice was studied. The batch biosorption experiments were performed at temperature (70 °C) and pH (10.5) of alkalized sugar juice similar to industrial conditions. The highest removal efficiency was noticed for divalent Ca2+ (30.2%), while monovalent Na+ and K+ ions were removed with 10.9 and 9.1% efficiency, respectively. Biosorption equilibrium was established in 90 min for all tested metals. Sugar beet pulp characterization from the perspective of cation-exhange material was conducted. The structure of the biosorbent and an insight of the functional groups were also characterized by scanning electron microscopy and Fourier transform infrared spectroscopy. The biosorption data were analyzed using four non-linear kinetic (pseudo-first order, pseudo-second order and Elovich) and diffusion models (Weber-Morris). The time course data of biosorption processes fitted well to the pseudo-first and the pseudo-second-order kinetic models indicating ion-exchange and chemisorption as dominant mechanisms for metal ions removal from the alkalized juice. HNO3 as a desorption reagent showed the highest average molassigenic metal ions desorption efficiency (54.4%). Utilization of sugar beet biomass as cation-exchange material imposes as a potential solution for more successful sugar juice purification.

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Section: Sbp Removal Efficiency and Kinetic Studymentioning

confidence: 75%

Section: Kinetic Modelsmentioning

confidence: 99%

Section: Sbp Removal Efficiency and Kinetic Studymentioning

confidence: 99%

See 1 more Smart Citation

Utilization of Sugar Beet Pulp as Biosorbent for Molassigenic Metal Ions: Kinetic Study of Batch Biosorption

Tukuljac

Krulj²,

Pezo³

et al. 2022

Period. Polytech. Chem. Eng.

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“…Washing can be performed with water, an acid, or a base depending on the biomass type and composition [20]. In addition, biomass can be used to produce materials such as hydrochar and biochar [32][33][34] or to isolate lignin [35][36][37], which can also be considered an adsorbent.…”

Section: Lignocellulose-based Biosorbents: Types and Preparation Methodsmentioning

confidence: 99%

Lignocellulose-Based Biosorbents for the Removal of Contaminants of Emerging Concern (CECs) from Water: A Review

Vasić,

Kukić,

Šćiban

et al. 2023

Water

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Contaminants of emerging concern (CECs) are chemicals or materials that are not under current regulation but there are increasing concerns about their possible occurrence in the environment because of their potential threat to human and environmental health, with wastewater perceived as their primary source. Although various techniques for their removal from water have been studied, it should be emphasized that the choice should also consider the use of resources and energy within the removal processes, which must be minimized to avoid additional carbon footprints and environmental impact. In this context, the use of biomass-based sorbents might represent a cost-effective and environmentally friendly approach for the removal of CECs from water because they are based on preferably local renewable resources with lower negative impacts on the global carbon cycle through greenhouse gas emissions than the conventional nonrenewable ones. This paper provides an overview of the studies dealing with the application of such so-called biosorbents for the removal of CECs from water and discusses the use of their different forms: sorbents after a minimal pretreatment of the original lignocellulosic biomass; sorbents extracted from lignocellulosic biomass and/or modified; and biochar-based sorbents obtained after thermochemical conversion of biomass. It explains possible modifications of biosorbents and discusses the efficiency of various biosorbents for the removal of selected emerging compounds that belong to the classes of pharmaceuticals, personal care products, and pesticides and compares the adsorption capacities, kinetic models, and mechanisms reported in the relevant literature. Biochar-based sorption has been studied more often if compared to other considered biosorbents. In some cases, removal efficiencies of contaminants greater than 90% were achieved, but nonetheless a wide range of efficiencies for different CECs indicates that for successful simultaneous multicompound removal, a combination of different processes seems to be a more appropriate approach than the stand-alone use of biosorbents. Finally, this review discusses the reasons behind the limited commercial application of the considered biosorbents and provides directions for possible further research, in particular the use of spent biosorbents from a perspective of circular systems.

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