Cited by 151Adsorption and biosorption for pollutant removalChemical Synthesis and CharacterizationEnvironmental remediation with nanomaterials

Removal of toxic metals from wastewater by Brazilian natural scolecite

Dal Bosco, Sandra Maria, Jimenez, Ricardo Sarti, Carvalho, Wagner Alves·2005·Journal of Colloid and Interface Science

Abstract

The cation-exchange capacity of Brazilian natural zeolite, identified as scolecite, was studied with the aim of evaluating its applications in wastewater control. We investigated the process of sorption of chromium(III), nickel(II), cadmium(II), and manganese(II) in synthetic aqueous effluents, including sorption isotherms of single-metal solutions at 298, 313, and 333 K, by batch experiments, and the influence of pH on the process. The results have demonstrated that removal of metals from specific metal solutions is best described by a Freundlich isotherm, in which the values obtained for the Kf constants were in the following order: Cr > Mn > Cd > Ni. A Lagergren pseudo-second-order was the model that best described the sorption mechanism. The retention of metals was shown to be a function of the pH; the maximum binding capacity occurring at pH values around 6.0. Thermodynamic data indicate the spontaneity of the endothermic cation-exchange process. The values of Delta G0 suggest the following selectivity series at 298 K: Ni > Cr > Cd > Mn. The desorption process reaches equilibrium during the first 60 min of binding, suggesting that the mechanism involves specific sites located in the external surface of the scolecite.

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Crossref · 10.1016/j.jcis.2004.08.060

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  • The adsorption percentage of cadmium removal by natural zeolites could be 100% based on the literature.

    “The adsorption percentage of cadmium removal by natural zeolites could be 100% based on the literature (Dal Bosco et al., 2005).”

    From Adsorption of heavy metals on natural zeolites: A review (2023) · cites this paper as Dal Bosco et al., 2005

  • There are two main categories of reagents to wash and recover natural zeolites by removing heavy metals: acids and alkalis.

    “there are two main categories of reagents to wash and recover natural zeolites by removing heavy metals i.e., acids (HCl, H 2 SO 4 , HNO 3 , HCOOH, CH 3 COOH), and alkalis (NaCl, KCl, NH 4 Cl, NaOH, NaHCO 3 , Na 2 CO 3 , KOH, K 2 CO 3 Ca (NO 3 ) 2 ).”

    From Adsorption of heavy metals on natural zeolites: A review (2023) · cites this paper as Dal Bosco et al., 2005

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Authors
Dal Bosco, S. M., Jimenez, R. S., & Carvalho, W. A.
Affiliations
Pontifícia Universidade Católica de Campinas (BR)
Corresponding author
Carvalho, Wagner Alves
Venue
Journal of Colloid and Interface Science
Publisher
Elsevier BV
Published
2005-01
Volume
281
Issue
2
Pages
424-431
ISSN
0021-9797 (ISSN-L)
OpenAlex
W1970716074
Cited by
151
References
31
Citations by year
2026: 3 · 2025: 6 · 2024: 4 · 2023: 5 · 2022: 4 · 2021: 4 · 2020: 6 · 2019: 5 · 2018: 5 · 2017: 3 · 2016: 5 · 2015: 10 · 2014: 8 · 2013: 9 · 2012: 9
FWCI
11.78
Type
journal article
Language
en
Open access
closed
Locations
  • Journal of Colloid and Interface Science (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Physical Sciences › Environmental Science › Water Science and Technology › Adsorption and biosorption for pollutant removal
  • Physical Sciences › Environmental Science › Waste Management and Disposal › Chemical Synthesis and Characterization
  • Physical Sciences › Engineering › Biomedical Engineering › Environmental remediation with nanomaterials
Keywords
scolecite, natural zeolite, heavy metal removal, wastewater treatment, cation exchange, trivalent chromium, nickel(II), cadmium(II), manganese(II), sorption isotherms, Freundlich isotherm, pseudo-second-order kinetics, pH effect, sorption thermodynamics, metal ion selectivity, desorption

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