TY - GEN
T1 - Which Characteristics Make Drinking Water Treatment Residuals a Low-Cost Adsorbent?
AU - Sousa, Diogo
AU - Bernardo, Maria
AU - Maurício, Rita
N1 - Publisher Copyright:
© The Author(s), under exclusive license to Springer Nature Switzerland AG 2024.
PY - 2024/6/18
Y1 - 2024/6/18
N2 - Millions of tons of Drinking Water Treatment Residuals (DWTR) are daily produced globally that mainly end up in landfills. The use of DWTR as an adsorbent for nutrients and emerging pollutants may become a sustainable option for this waste that can become a by-product. The aim of this study was to analyse seven DWTR with significant activated carbon content as adsorbents of phosphate (PO43-) and trimethoprim antibiotic (TMP). DWTR characterization showed that although all samples incorporated the same water treatment chemical reagents, the amount of it and the raw water characteristics resulted in differences in their chemical and physical characteristics. The PO43- adsorption studies showed that for a solid/liquid (S/L) ratio of 1.18 g/L, uptake capacities higher than 9 mg/g were achieved for most of the DWTR, while for TMP a S/L of 0.29 g/L achieved uptake capacities higher than 1 mg/g for some DWTR samples. In this study, it was possible to conclude that the PO43- adsorption is influenced by the Al and Ca content and the pHPZC, suggesting that highly alkaline DWTR have greater adsorption capacity. For TMP adsorption, DWTR surface area is important, however, further studies are required to identify key characteristics for TMP adsorption, including optimal dosage for removal optimization. The adsorption experiments in real samples demonstrated the potential of DWTR as an adsorbent for wastewater treatment.
AB - Millions of tons of Drinking Water Treatment Residuals (DWTR) are daily produced globally that mainly end up in landfills. The use of DWTR as an adsorbent for nutrients and emerging pollutants may become a sustainable option for this waste that can become a by-product. The aim of this study was to analyse seven DWTR with significant activated carbon content as adsorbents of phosphate (PO43-) and trimethoprim antibiotic (TMP). DWTR characterization showed that although all samples incorporated the same water treatment chemical reagents, the amount of it and the raw water characteristics resulted in differences in their chemical and physical characteristics. The PO43- adsorption studies showed that for a solid/liquid (S/L) ratio of 1.18 g/L, uptake capacities higher than 9 mg/g were achieved for most of the DWTR, while for TMP a S/L of 0.29 g/L achieved uptake capacities higher than 1 mg/g for some DWTR samples. In this study, it was possible to conclude that the PO43- adsorption is influenced by the Al and Ca content and the pHPZC, suggesting that highly alkaline DWTR have greater adsorption capacity. For TMP adsorption, DWTR surface area is important, however, further studies are required to identify key characteristics for TMP adsorption, including optimal dosage for removal optimization. The adsorption experiments in real samples demonstrated the potential of DWTR as an adsorbent for wastewater treatment.
KW - Adsorption
KW - Circular Economy
KW - Drinking Water Treatment Residuals
KW - Emerging Compounds
UR - http://www.scopus.com/inward/record.url?scp=85197852655&partnerID=8YFLogxK
U2 - 10.1007/978-3-031-63353-9_37
DO - 10.1007/978-3-031-63353-9_37
M3 - Conference contribution
AN - SCOPUS:85197852655
SN - 978-3-031-63352-2
T3 - Lecture Notes in Civil Engineering
SP - 211
EP - 217
BT - Resource Recovery from Wastewater Treatment
A2 - Mannina, Giorgio
A2 - Cosenza, Alida
A2 - Mineo, Antonio
PB - Springer
CY - Cham
T2 - International Conference on Wider-Uptake of Water Resource Recovery from Wastewater Treatment, ICWRR 2024
Y2 - 18 June 2024 through 21 June 2024
ER -