The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent
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2018
Authors
Karanac, MilicaĐolić, Maja B.
Veljović, Đorđe N.
Rajaković-Ognjanović, Vladana N.
Veličković, Zlate S.
Pavićević, Vladimir
Marinković, Aleksandar D.
Article (Published version)
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© 2018 Elsevier Ltd.
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This study focuses on the use of raw fly ash (FA) and modified fly ash – activated by lime (MFA), as effective and low-cost adsorbents for the removal of heavy metals (Zn2+, Pb2+and As(V)), followed by the revalorization of the exhausted adsorbent. The granulometric, elemental analysis, point of zero charge (pHPZC), radiochemical and structural characterization were conducted using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and gamma spectrometry techniques. The optimal conditions and key factors influencing the adsorption process were assessed using the response surface method (RSM). The adsorption capacity of the MFA adsorbent for Zn2+, Pb2+and As(V) removal, calculated by the Langmuir model, was found to be 33.13, 26.06, and 29.71 mg g−1, respectively. The kinetic and thermodynamic parameters indicated that the adsorption process is spontaneous and endothermic. Due to their low desorption potential of ...the exhausted adsorbents, their effective reuse was established to be feasible. For this reason, the valorization of this material as an additive in construction materials was thereafter studied, where testing its toxicity leaching (TCLP) as well as the mechanical properties of construction material containing exhausted MFA confirmed its safe use. Hence, this study points to a possible “two-in-one” reuse of coal ash, initially as an adsorbent and later as an additive in a construction material.
Keywords:
(re)valorization of waste material / chemical activation / construction material / fly ash/Ca(OH)2Source:
Waste Management, 2018, 78, 366-378Funding / projects:
- Advanced technologies for monitoring and environmental protection from chemical pollutants and radiation burden (RS-43009)
- Cleaner production: power plant wastewater treatment process development (RS-34009)
DOI: 10.1016/j.wasman.2018.05.052
ISSN: 0956-053X
WoS: 000444660600039
Scopus: 2-s2.0-85048732410
URI
https://linkinghub.elsevier.com/retrieve/pii/S0956053X18303490https://vinar.vin.bg.ac.rs/handle/123456789/7728
Institution/Community
VinčaTY - JOUR AU - Karanac, Milica AU - Đolić, Maja B. AU - Veljović, Đorđe N. AU - Rajaković-Ognjanović, Vladana N. AU - Veličković, Zlate S. AU - Pavićević, Vladimir AU - Marinković, Aleksandar D. PY - 2018 UR - https://linkinghub.elsevier.com/retrieve/pii/S0956053X18303490 UR - https://vinar.vin.bg.ac.rs/handle/123456789/7728 AB - This study focuses on the use of raw fly ash (FA) and modified fly ash – activated by lime (MFA), as effective and low-cost adsorbents for the removal of heavy metals (Zn2+, Pb2+and As(V)), followed by the revalorization of the exhausted adsorbent. The granulometric, elemental analysis, point of zero charge (pHPZC), radiochemical and structural characterization were conducted using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and gamma spectrometry techniques. The optimal conditions and key factors influencing the adsorption process were assessed using the response surface method (RSM). The adsorption capacity of the MFA adsorbent for Zn2+, Pb2+and As(V) removal, calculated by the Langmuir model, was found to be 33.13, 26.06, and 29.71 mg g−1, respectively. The kinetic and thermodynamic parameters indicated that the adsorption process is spontaneous and endothermic. Due to their low desorption potential of the exhausted adsorbents, their effective reuse was established to be feasible. For this reason, the valorization of this material as an additive in construction materials was thereafter studied, where testing its toxicity leaching (TCLP) as well as the mechanical properties of construction material containing exhausted MFA confirmed its safe use. Hence, this study points to a possible “two-in-one” reuse of coal ash, initially as an adsorbent and later as an additive in a construction material. T2 - Waste Management T1 - The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent VL - 78 SP - 366 EP - 378 DO - 10.1016/j.wasman.2018.05.052 ER -
@article{ author = "Karanac, Milica and Đolić, Maja B. and Veljović, Đorđe N. and Rajaković-Ognjanović, Vladana N. and Veličković, Zlate S. and Pavićević, Vladimir and Marinković, Aleksandar D.", year = "2018", abstract = "This study focuses on the use of raw fly ash (FA) and modified fly ash – activated by lime (MFA), as effective and low-cost adsorbents for the removal of heavy metals (Zn2+, Pb2+and As(V)), followed by the revalorization of the exhausted adsorbent. The granulometric, elemental analysis, point of zero charge (pHPZC), radiochemical and structural characterization were conducted using X-ray diffraction (XRD), Brunauer–Emmett–Teller (BET), scanning electron microscopy (SEM), Fourier transform infrared (FTIR) and gamma spectrometry techniques. The optimal conditions and key factors influencing the adsorption process were assessed using the response surface method (RSM). The adsorption capacity of the MFA adsorbent for Zn2+, Pb2+and As(V) removal, calculated by the Langmuir model, was found to be 33.13, 26.06, and 29.71 mg g−1, respectively. The kinetic and thermodynamic parameters indicated that the adsorption process is spontaneous and endothermic. Due to their low desorption potential of the exhausted adsorbents, their effective reuse was established to be feasible. For this reason, the valorization of this material as an additive in construction materials was thereafter studied, where testing its toxicity leaching (TCLP) as well as the mechanical properties of construction material containing exhausted MFA confirmed its safe use. Hence, this study points to a possible “two-in-one” reuse of coal ash, initially as an adsorbent and later as an additive in a construction material.", journal = "Waste Management", title = "The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent", volume = "78", pages = "366-378", doi = "10.1016/j.wasman.2018.05.052" }
Karanac, M., Đolić, M. B., Veljović, Đ. N., Rajaković-Ognjanović, V. N., Veličković, Z. S., Pavićević, V.,& Marinković, A. D.. (2018). The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent. in Waste Management, 78, 366-378. https://doi.org/10.1016/j.wasman.2018.05.052
Karanac M, Đolić MB, Veljović ĐN, Rajaković-Ognjanović VN, Veličković ZS, Pavićević V, Marinković AD. The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent. in Waste Management. 2018;78:366-378. doi:10.1016/j.wasman.2018.05.052 .
Karanac, Milica, Đolić, Maja B., Veljović, Đorđe N., Rajaković-Ognjanović, Vladana N., Veličković, Zlate S., Pavićević, Vladimir, Marinković, Aleksandar D., "The removal of Zn2+, Pb2+, and As(V) ions by lime activated fly ash and valorization of the exhausted adsorbent" in Waste Management, 78 (2018):366-378, https://doi.org/10.1016/j.wasman.2018.05.052 . .