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Removal of Copper from Mining Wastewater Using Natural Raw Material—Comparative Study between the Synthetic and Natural Wastewater Samples

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2020
minerals-10-00753.pdf (6.382Mb)
Authors
Milićević, Sonja
Vlahović, Milica
Kragović, Milan
Martinović, Sanja
Milošević, Vladan
Jovanović, Ivana
Stojmenović, Marija
Article (Published version)
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Abstract
The intent in this paper is to define how the batch equilibrium results of copper removal from a synthetic solution on natural zeolite can be used for prediction of the breakthrough curves in the fixed-bed system for both a synthetic solution and wastewater. Natural zeolite from the Vranjska Banja deposit, Serbia, has been fully characterized (XRD, chemical composition, DTA/TG, SEM/EDS) as a clinoptilolite with cation exchange capacity of 146 meq/100 g. The maximum adsorption capacity (qm) in the batch of the mono-component system (synthetic copper solution) obtained using the Langmuir isotherm model was 7.30 and 6.10 mg/g for particle size below 0.043 and 0.6–0.8 mm, respectively. Using the flow-through system with the 0.6–0.8 mm zeolite fixed-bed, almost double the adsorption capacity (11.2–12.2 mg/g) has been achieved in a saturation point for the copper removal from the synthetic solution, compared to the batch. Better results are attributed to the constant high concentration gradi...ent in flow-through systems compared to the batch. The complex composition of wastewater and large amounts of earth alkaline metals disturb free adsorption sights on the zeolite surface. This results in a less effective adsorption in flow-through systems with adsorption capacity in breakthrough point of 5.84 mg/g (~0.95 × qm) and in a saturation point of 7.10 mg/g (~1.15 × qm).

Keywords:
zeolite / wastewater / heavy metals / batch / fixed-bed / adsorption capacity
Source:
Minerals, 2020, 10, 9, 753-
Publisher:
  • MDPI
Projects:
  • Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 451-03-68/2020-14/200023 (Institute of Technology of Nuclear and Other Mineral Row Materials - ITNMS, Belgrade) (RS-200023)
  • info:eu-repo/grantAgreement/MESTD-2020/inst/200026/RS// (RS-200026)

DOI: 10.3390/min10090753

ISSN: 2075-163X

WoS: 000580670100001

Scopus: 2-s2.0-85090604119
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URI
https://cer.ihtm.bg.ac.rs/handle/123456789/3762
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