Heavy metals adsorption using CDW adsorbents: A sustainable path for water purification
The result's identifiers
Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F46747885%3A24620%2F25%3A00013671" target="_blank" >RIV/46747885:24620/25:00013671 - isvavai.cz</a>
Result on the web
<a href="https://doi.org/10.1016/j.hazadv.2025.100883" target="_blank" >https://doi.org/10.1016/j.hazadv.2025.100883</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.hazadv.2025.100883" target="_blank" >10.1016/j.hazadv.2025.100883</a>
Alternative languages
Result language
angličtina
Original language name
Heavy metals adsorption using CDW adsorbents: A sustainable path for water purification
Original language description
Effective removal of heavy metals from water is crucial for human health and environmental protection, and adsorbents provide a sustainable, cost-effective treatment solution. This study is the first to investigate Low-Density Concrete (LDC) for removing selected heavy metals (Pb2+, Co2+, and Mn2+) from water. The adsorbent was characterised using X-ray fluorescence (XRF), Fourier Transform Infrared spectrophotometry (FTIR), Brunauer-Emmett-Teller (BET) analysis, X-ray diffraction (XRD) analysis, and Field Emission Scanning Electron Microscopy (FE-SEM). The One-Factor-at-A-Time (OFAT) method optimised the essential parameters affecting the metal removal. Eight different isotherm models were used to determine the adsorption parameters and elucidate the associated sorption mechanism. Then, its kinetic behavior and selectivity for decontamination were analyzed. The outcomes demonstrated that the adsorption capacities for Pb2+, Mn2+, and Co2+ were 43.1, 23.5, and 15.2 mg g⁻¹, respectively. Moreover, the second-order kinetic rate constants for Pb²⁺, Mn²⁺, and Co²⁺ were determined to be 1.99, 0.076, and 0.49 g mg⁻¹ min⁻¹, respectively. As a novel contribution, the regeneration process of heavy metal adsorption is modelled by Thales-based theorem. In this study, synthetic wastewater was used, while regeneration conditions simulated industrial effluents to enhance real-world relevance. Finally, the applied construction and demolition waste (CDW) adsorbent is evaluated by Sustainable Material Management, EPA models. The isothermal modelling illustrated that the adsorption of Pb2+, Co2+, and Mn2+ onto LDC wastes is done physically and on the heterogeneous surface as multilayer adsorption. The Thales-based model demonstrated that after nine cycles of adsorption and formal regeneration with acid, the LDC adsorbent consistently maintained lead concentrations below the World Health Organization (WHO) standard.
Czech name
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Czech description
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Classification
Type
J<sub>imp</sub> - Article in a specialist periodical, which is included in the Web of Science database
CEP classification
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OECD FORD branch
10511 - Environmental sciences (social aspects to be 5.7)
Result continuities
Project
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Continuities
R - Projekt Ramcoveho programu EK
Others
Publication year
2025
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Data specific for result type
Name of the periodical
Journal of hazardous materials advances>
ISSN
2772-4166
e-ISSN
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Volume of the periodical
20
Issue of the periodical within the volume
NOV
Country of publishing house
NL - THE KINGDOM OF THE NETHERLANDS
Number of pages
18
Pages from-to
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UT code for WoS article
001576212400001
EID of the result in the Scopus database
2-s2.0-105016402712