Hybrid pectin-based biosorbents for zinc ions removal

Jakóbik‐Kolon, Agata; Bok-Badura, Joanna; Karoń, Krzysztof; Mitko, Krzysztof; Milewski, Andrzej

doi:10.1016/j.carbpol.2017.03.095

Cited by 50 publications

(22 citation statements)

References 32 publications

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“…However, some agreement between the present studies and our preliminary studies concerning these hybrid beads formation and pH-dependent sorption studies may be found. Based on the amount of released calcium ions during preliminary sorption studies, it was stated that in the case of agar-agar addition, probably only Zn-Ca ion-exchange mechanism occurs, in opposite to hybrid biosorbents with guar gum, where physisorption may also take place [ 34 ]. The results obtained in current studies for beads with agar additive indicate the pseudo-second-order kinetics (this model fits better to obtained data due to higher R 2 ), thus, chemisorption.…”

Section: Resultsmentioning

confidence: 99%

“…For example, in our previous studies we proposed the use of polysaccharides, such as agar-agar, arabic gum, tragacanth gum, guar gum, karaya gum, and phospholipids, such as lecithin, as the additives for pectin-based biosorbents for zinc ion removal. We proved that the additives influenced the structure of the obtained biosorbents, as well as their properties, e.g., the swelling index [ 34 ]. Taking into account the mentioned properties of pectin-based biosorbents and cost of the applied additives, the biosorbents with agar-agar and guar gum additives were selected for further examination.…”

Section: Introductionmentioning

confidence: 99%

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Zinc Sorption Studies on Pectin-Based Biosorbents

2017

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The previously-obtained and characterized hybrid pectin-based beads containing agar-agar and guar gum, as well as sole pectin beads (P, for comparison) were examined for zinc ions sorption and desorption properties. The sorption kinetics and equilibrium in the studied system was described by two kinetic models (pseudo-first- and pseudo-second-order) and two isotherms (Langmuir and Freundlich), respectively. The desorption kinetics and equilibrium was also investigated by applying various inorganic acids (nitric, hydrochloric, and sulfuric acid) of various concentrations. In the case of guar gum additive, no significant change in sorption capacity compared to sole pectin beads was observed (q: 37.0 ± 2.6 and 34.7 ± 2.0 mg/g, respectively). Addition of agar-agar significantly decreased the sorption capacity to 22.3 ± 1.0 mg/g, but stripping of zinc(II) ions from this biosorbent was complete even with very diluted acids (0.01 M). Total desorption of zinc from sole pectin and pectin-guar gum beads required acid solution of higher concentration (0.1 M). Sorption rates for all biosorbents are roughly the same and maximum sorption is achieved after 4–5 h. Obtained results and the advantage of our sorbent’s shape formation ability, make the pectin-based biosorbents interesting alternative for zinc(II) ions removal.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Zinc Sorption Studies on Pectin-Based Biosorbents

2017

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“…These results were consistent with the previous investigations on HAP 6,11,27 and pectin. 28,29 However, under the same experimental conditions, the capacity of ve different HAP/pectin hybrids averaged more than 225 mg Zn 2+ per gram of adsorbent. By adjusting the mass ratio of HAP and pectin; and modifying the synthesis procedure (with or without ethanol dehydration treatment), the best performing hybrid (6H1P) achieved 285.6 AE 3.3 mg Zn 2+ per gram of hybrid adsorbent.…”

Section: Synthesis Optimizationmentioning

confidence: 93%

Synthesis and appraisal of a hydroxyapatite/pectin hybrid material for zinc removal from water

Fox

2019

RSC Adv.

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Section: Introductionmentioning

confidence: 99%

“…From an industrial point of view, zinc has unique properties that encourage its extensive use in various sectors, such as in steel surface coatings, construction materials, batteries and paints. 1 On the other hand, although no maximum limits have been established for discharge of zinc-contaminated wastewater, concentrations above 3.0 mg L -1 may not be considered suitable. 2 This is because even though it is considered a trace element of extreme importance for any living organism, 3 zinc ions can be associated with human diseases when present in excess.…”

Section: Introductionmentioning

confidence: 99%

Dealginated seaweed waste for Zn(II) continuous removal from aqueous solution on fixed‐bed column

Cardoso

Costa

Silva

et al. 2017

J of Chemical Tech & Biotech

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BACKGROUND The alginate extraction residue from Brazilian Sargassum filipendula was employed as biosorbent for Zn(II) removal through a fixed‐bed column in order to explore its adsorptive properties and to establish a new use for this waste. RESULTS The best operating conditions were 0.5 mL min‐1 and 1.0 mmol L‐1 (inlet concentration), providing lower mass transfer zone and higher uptake. Elution percentages of 52 and 73% were obtained for the first and second desorption cycles, respectively, using CaCl2 as eluent. The Yan et al. model was more representative of the experimental data. Characterization revealed that ion exchange is involved between zinc ions and light metals (Ca, Na, K and Mg). A decrease was observed in real and apparent densities of biomass, with an increase in particle porosity of the residue after process. CONCLUSION The study revealed that this biomass has potential for Zn removal from aqueous solution, encouraging its application as a biosorbent in future studies involving multicomponent systems. © 2017 Society of Chemical Industry

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Hybrid pectin-based biosorbents for zinc ions removal

Cited by 50 publications

References 32 publications

Zinc Sorption Studies on Pectin-Based Biosorbents

Zinc Sorption Studies on Pectin-Based Biosorbents

Synthesis and appraisal of a hydroxyapatite/pectin hybrid material for zinc removal from water

Dealginated seaweed waste for Zn(II) continuous removal from aqueous solution on fixed‐bed column

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