Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff
Само за регистроване кориснике
2017
Чланак у часопису (Објављена верзија)
Метаподаци
Приказ свих података о документуАпстракт
The present study was aimed at examining the ability of the natural zeolitic tuff from the Zlatokop deposit in Serbia to remove Pb(II) ions from aqueous solutions under various conditions. It has been found that the adsorption proceeds via an ion-exchange reaction in which the Na+ ions from the clinoptilolite phase of the tuff are replaced to a high degree by aqueous Pb(II) ions. The removal capacity of the clinoptilolite at 298 K varies from 78 mg Pb g(-1) (for C-0 = 100 mg Pb dm-3) to 92.5 mg Pb g(-1) (for C-0 = 400 mg Pb dm(-3)), the capacity markedly increasing with temperature. The adsorption isotherm is in accord with the Langmuir model. The ion-exchange kinetics can be best described by the pseudo-second-order model. Intra-particle diffusion of Pb2+ is present in the process, but it is not the rate-limiting step and that can be explained by a modification of the Pb(II) hydration sphere during the ion-exchange. From the adsorption of Pb(II) on the studied zeolitic tuff, it is rev...ealed that the ion-exchange process is spontaneous and endothermic, and that the standard free energy decreases with temperature.
Кључне речи:
lead / kinetics / thermodynamics / clinoptilolite / natural zeolite / heavy metalИзвор:
Environmental Engineering and Management Journal, 2017, 16, 1, 131-140Издавач:
- Gheorghe Asachi Technical University of Iasi, Romania
Финансирање / пројекти:
- Порозни материјали на бази оксида у заштити животне средине од генотоксичних супстанци (RS-MESTD-Basic Research (BR or ON)-172018)
DOI: 10.30638/eemj.2017.015
ISSN: 1582-9596
PubMed:
WoS: 000399094900015
Scopus: 2-s2.0-85045077611
Институција/група
Tehnološko-metalurški fakultetTY - JOUR AU - Stojaković, Đorđe AU - Jovanović, Mina AU - Rajić, Nevenka PY - 2017 UR - http://TechnoRep.tmf.bg.ac.rs/handle/123456789/3501 AB - The present study was aimed at examining the ability of the natural zeolitic tuff from the Zlatokop deposit in Serbia to remove Pb(II) ions from aqueous solutions under various conditions. It has been found that the adsorption proceeds via an ion-exchange reaction in which the Na+ ions from the clinoptilolite phase of the tuff are replaced to a high degree by aqueous Pb(II) ions. The removal capacity of the clinoptilolite at 298 K varies from 78 mg Pb g(-1) (for C-0 = 100 mg Pb dm-3) to 92.5 mg Pb g(-1) (for C-0 = 400 mg Pb dm(-3)), the capacity markedly increasing with temperature. The adsorption isotherm is in accord with the Langmuir model. The ion-exchange kinetics can be best described by the pseudo-second-order model. Intra-particle diffusion of Pb2+ is present in the process, but it is not the rate-limiting step and that can be explained by a modification of the Pb(II) hydration sphere during the ion-exchange. From the adsorption of Pb(II) on the studied zeolitic tuff, it is revealed that the ion-exchange process is spontaneous and endothermic, and that the standard free energy decreases with temperature. PB - Gheorghe Asachi Technical University of Iasi, Romania T2 - Environmental Engineering and Management Journal T1 - Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff EP - 140 IS - 1 SP - 131 VL - 16 DO - 10.30638/eemj.2017.015 ER -
@article{ author = "Stojaković, Đorđe and Jovanović, Mina and Rajić, Nevenka", year = "2017", abstract = "The present study was aimed at examining the ability of the natural zeolitic tuff from the Zlatokop deposit in Serbia to remove Pb(II) ions from aqueous solutions under various conditions. It has been found that the adsorption proceeds via an ion-exchange reaction in which the Na+ ions from the clinoptilolite phase of the tuff are replaced to a high degree by aqueous Pb(II) ions. The removal capacity of the clinoptilolite at 298 K varies from 78 mg Pb g(-1) (for C-0 = 100 mg Pb dm-3) to 92.5 mg Pb g(-1) (for C-0 = 400 mg Pb dm(-3)), the capacity markedly increasing with temperature. The adsorption isotherm is in accord with the Langmuir model. The ion-exchange kinetics can be best described by the pseudo-second-order model. Intra-particle diffusion of Pb2+ is present in the process, but it is not the rate-limiting step and that can be explained by a modification of the Pb(II) hydration sphere during the ion-exchange. From the adsorption of Pb(II) on the studied zeolitic tuff, it is revealed that the ion-exchange process is spontaneous and endothermic, and that the standard free energy decreases with temperature.", publisher = "Gheorghe Asachi Technical University of Iasi, Romania", journal = "Environmental Engineering and Management Journal", title = "Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff", pages = "140-131", number = "1", volume = "16", doi = "10.30638/eemj.2017.015" }
Stojaković, Đ., Jovanović, M.,& Rajić, N.. (2017). Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff. in Environmental Engineering and Management Journal Gheorghe Asachi Technical University of Iasi, Romania., 16(1), 131-140. https://doi.org/10.30638/eemj.2017.015
Stojaković Đ, Jovanović M, Rajić N. Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff. in Environmental Engineering and Management Journal. 2017;16(1):131-140. doi:10.30638/eemj.2017.015 .
Stojaković, Đorđe, Jovanović, Mina, Rajić, Nevenka, "Lead(ii) removal from aqueous solutions by Serbian zeolitic tuff" in Environmental Engineering and Management Journal, 16, no. 1 (2017):131-140, https://doi.org/10.30638/eemj.2017.015 . .