A nappies management by-product for the treatment of uranium-contaminated waters
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Anastopoulos, Ioannis
Milojković, Jelena

Tsigkou, Konstantina
Zafiri, Constantina
Lopičić, Zorica

Kornaros, Michael
Pashalidis, Ioannis
Article (Published version)

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The direct disposal of municipal solid waste such as nappies to the environment may create serious pollution problems. Based on the circular economy and waste management concepts, the conversion of nappies and/or their ingredients (such as super absorbent polymer (SAP)) to high added value products is of great importance. In this work, a modified SAP (MSAP) was examined as an adsorbent for treatment of contaminated waters and uranium recovery. Batch experiments and spectroscopic techniques were used to examine the effect of various parameters (pH, contact time, temperature, initial concentration, and ionic strength), and the mechanism of adsorption U(VI) and desorption process. The U(VI) concentration was determined by alpha spectroscopy after addition of U-232 standard tracer solution to account for possible interferences during electrodeposition and alpha particle counting. The maximum adsorption monolayer capacity was found to be 217.4 mg/g at pH 4.0 and at 298 K. The adsorption of ...U(VI) on MSAP seems to occur mainly via the formation of inner-sphere surface complexes between U(VI) and the carboxylic surface moieties of MSAP. The MSAP could satisfactorily be regenerated with 0.1 M Na2CO3 (>90%) and it also shows a promising applicability to real wastewaters contaminated with U(VI).
Keywords:
Waste management / Uranium / Nappies / Modified super absorbent polymer / Isotherms / Adsorption modellingSource:
Journal of Hazardous Materials, 2021, 404Publisher:
- Elsevier, Amsterdam
Funding / projects:
- University of Cyprus
- Ministry of Education, Science and Technological Development, Republic of Serbia, Grant no. 200023 (Institute of Technology of Nuclear and Other Mineral Row Materials - ITNMS, Belgrade) (RS-200023)
- European Commission - Executive Agency for SMEs (EA small and medium-sized enterprises) Project WASTE4THINK [H2020 - GA 688995]
DOI: 10.1016/j.jhazmat.2020.124147
ISSN: 0304-3894
PubMed: 33059251
WoS: 000598735300008
Scopus: 2-s2.0-85092337787
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Institut za tehnologiju nuklearnih i drugih mineralnih sirovinaTY - JOUR AU - Anastopoulos, Ioannis AU - Milojković, Jelena AU - Tsigkou, Konstantina AU - Zafiri, Constantina AU - Lopičić, Zorica AU - Kornaros, Michael AU - Pashalidis, Ioannis PY - 2021 UR - https://ritnms.itnms.ac.rs/handle/123456789/601 AB - The direct disposal of municipal solid waste such as nappies to the environment may create serious pollution problems. Based on the circular economy and waste management concepts, the conversion of nappies and/or their ingredients (such as super absorbent polymer (SAP)) to high added value products is of great importance. In this work, a modified SAP (MSAP) was examined as an adsorbent for treatment of contaminated waters and uranium recovery. Batch experiments and spectroscopic techniques were used to examine the effect of various parameters (pH, contact time, temperature, initial concentration, and ionic strength), and the mechanism of adsorption U(VI) and desorption process. The U(VI) concentration was determined by alpha spectroscopy after addition of U-232 standard tracer solution to account for possible interferences during electrodeposition and alpha particle counting. The maximum adsorption monolayer capacity was found to be 217.4 mg/g at pH 4.0 and at 298 K. The adsorption of U(VI) on MSAP seems to occur mainly via the formation of inner-sphere surface complexes between U(VI) and the carboxylic surface moieties of MSAP. The MSAP could satisfactorily be regenerated with 0.1 M Na2CO3 (>90%) and it also shows a promising applicability to real wastewaters contaminated with U(VI). PB - Elsevier, Amsterdam T2 - Journal of Hazardous Materials T1 - A nappies management by-product for the treatment of uranium-contaminated waters VL - 404 DO - 10.1016/j.jhazmat.2020.124147 UR - conv_898 ER -
@article{ author = "Anastopoulos, Ioannis and Milojković, Jelena and Tsigkou, Konstantina and Zafiri, Constantina and Lopičić, Zorica and Kornaros, Michael and Pashalidis, Ioannis", year = "2021", abstract = "The direct disposal of municipal solid waste such as nappies to the environment may create serious pollution problems. Based on the circular economy and waste management concepts, the conversion of nappies and/or their ingredients (such as super absorbent polymer (SAP)) to high added value products is of great importance. In this work, a modified SAP (MSAP) was examined as an adsorbent for treatment of contaminated waters and uranium recovery. Batch experiments and spectroscopic techniques were used to examine the effect of various parameters (pH, contact time, temperature, initial concentration, and ionic strength), and the mechanism of adsorption U(VI) and desorption process. The U(VI) concentration was determined by alpha spectroscopy after addition of U-232 standard tracer solution to account for possible interferences during electrodeposition and alpha particle counting. The maximum adsorption monolayer capacity was found to be 217.4 mg/g at pH 4.0 and at 298 K. The adsorption of U(VI) on MSAP seems to occur mainly via the formation of inner-sphere surface complexes between U(VI) and the carboxylic surface moieties of MSAP. The MSAP could satisfactorily be regenerated with 0.1 M Na2CO3 (>90%) and it also shows a promising applicability to real wastewaters contaminated with U(VI).", publisher = "Elsevier, Amsterdam", journal = "Journal of Hazardous Materials", title = "A nappies management by-product for the treatment of uranium-contaminated waters", volume = "404", doi = "10.1016/j.jhazmat.2020.124147", url = "conv_898" }
Anastopoulos, I., Milojković, J., Tsigkou, K., Zafiri, C., Lopičić, Z., Kornaros, M.,& Pashalidis, I.. (2021). A nappies management by-product for the treatment of uranium-contaminated waters. in Journal of Hazardous Materials Elsevier, Amsterdam., 404. https://doi.org/10.1016/j.jhazmat.2020.124147 conv_898
Anastopoulos I, Milojković J, Tsigkou K, Zafiri C, Lopičić Z, Kornaros M, Pashalidis I. A nappies management by-product for the treatment of uranium-contaminated waters. in Journal of Hazardous Materials. 2021;404. doi:10.1016/j.jhazmat.2020.124147 conv_898 .
Anastopoulos, Ioannis, Milojković, Jelena, Tsigkou, Konstantina, Zafiri, Constantina, Lopičić, Zorica, Kornaros, Michael, Pashalidis, Ioannis, "A nappies management by-product for the treatment of uranium-contaminated waters" in Journal of Hazardous Materials, 404 (2021), https://doi.org/10.1016/j.jhazmat.2020.124147 ., conv_898 .