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).
TY - 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 .
