Composites of construction waste with niobic acid as a new eco-friendly alternative for phosphate adsorption
Phosphate is an essential nutrient, but at high concentrations, it causes eutrophication, a global environmental concern. This study presents a novel approach for phosphate removal applying composites from construction waste (autoclaved aerated concrete, AC, and red ceramic, RC) modified with niobic...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-07-01
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| Series: | Desalination and Water Treatment |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S1944398625003261 |
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| author | Lucas Lacerda Cabral Anna Vitória Cardoso Martins Isabele Stresser Aleluia Janete Erika Fujihara André Nagalli Fernando Hermes Passig Roberta Carolina Pelissari Rizzo-Domingues Karina Querne de Carvalho |
| author_facet | Lucas Lacerda Cabral Anna Vitória Cardoso Martins Isabele Stresser Aleluia Janete Erika Fujihara André Nagalli Fernando Hermes Passig Roberta Carolina Pelissari Rizzo-Domingues Karina Querne de Carvalho |
| author_sort | Lucas Lacerda Cabral |
| collection | DOAJ |
| description | Phosphate is an essential nutrient, but at high concentrations, it causes eutrophication, a global environmental concern. This study presents a novel approach for phosphate removal applying composites from construction waste (autoclaved aerated concrete, AC, and red ceramic, RC) modified with niobic acid (NA). The composites were chemically (NAC and NRC) and thermochemically (NTAC and NTRC) activated, and their physicochemical and morphological properties were thoroughly characterized. NAC (1.99 m2 g−1), NTAC (0.40 m2 g−1), NRC (5.72 m2 g−1), and NTRC (0.53 m2 g−1) showed low specific surface areas, rough and porous structures and adhered NA grains. The composites exhibited high phosphate removal efficiencies - 80.6 % after 24 h for NAC and 97.5 % within 60 min for NTAC. Adsorption kinetics followed the pseudo-second-order model (0.51 mg g−1 for NAC; 0.29 mg g−1 for NTAC), suggesting chemisorption and equilibrium data fit the Sips model for NAC (R2 = 0.99 and Δqe = 0.14 %) and Langmuir model for NTAC (R2 = 0.99 and Δqe = 0.10 %), indicating heterogeneous and monolayer adsorption, respectively. The proposed mechanisms included pore-filling, electrostatic attraction, surface precipitation and complexation with niobium. These findings underscore the potential of NA-modified construction waste composites as efficient, sustainable phosphate adsorbents for wastewater treatment. |
| format | Article |
| id | doaj-art-4435e66b28fa4eb1803ad2e0b08c7be1 |
| institution | Kabale University |
| issn | 1944-3986 |
| language | English |
| publishDate | 2025-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Desalination and Water Treatment |
| spelling | doaj-art-4435e66b28fa4eb1803ad2e0b08c7be12025-08-20T03:50:25ZengElsevierDesalination and Water Treatment1944-39862025-07-0132310131010.1016/j.dwt.2025.101310Composites of construction waste with niobic acid as a new eco-friendly alternative for phosphate adsorptionLucas Lacerda Cabral0Anna Vitória Cardoso Martins1Isabele Stresser Aleluia2Janete Erika Fujihara3André Nagalli4Fernando Hermes Passig5Roberta Carolina Pelissari Rizzo-Domingues6Karina Querne de Carvalho7Federal University of Paraná (UFPR), Department of Chemistry, Centro Politécnico, Jardim das Américas, postal code 19011, Paraná, Curitiba 81531-980, BrazilFederal University of Technology – Paraná (UTFPR), Chemistry and Biology Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, Paraná, Curitiba 81280-340, BrazilFederal University of Technology – Paraná (UTFPR), Chemistry and Biology Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, Paraná, Curitiba 81280-340, BrazilFederal University of Technology – Paraná (UTFPR), Civil Construction Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, Paraná, Curitiba 81280-340, BrazilFederal University of Technology – Paraná (UTFPR), Civil Construction Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, Paraná, Curitiba 81280-340, BrazilFederal University of Technology – Paraná (UTFPR), Chemistry and Biology Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, Paraná, Curitiba 81280-340, BrazilFederal University of Technology – Paraná (UTFPR), Chemistry and Biology Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, Paraná, Curitiba 81280-340, BrazilFederal University of Technology – Paraná (UTFPR), Civil Construction Academic Department, Deputado Heitor de Alencar Furtado St., 5000, Ecoville, Paraná, Curitiba 81280-340, Brazil; Corresponding author.Phosphate is an essential nutrient, but at high concentrations, it causes eutrophication, a global environmental concern. This study presents a novel approach for phosphate removal applying composites from construction waste (autoclaved aerated concrete, AC, and red ceramic, RC) modified with niobic acid (NA). The composites were chemically (NAC and NRC) and thermochemically (NTAC and NTRC) activated, and their physicochemical and morphological properties were thoroughly characterized. NAC (1.99 m2 g−1), NTAC (0.40 m2 g−1), NRC (5.72 m2 g−1), and NTRC (0.53 m2 g−1) showed low specific surface areas, rough and porous structures and adhered NA grains. The composites exhibited high phosphate removal efficiencies - 80.6 % after 24 h for NAC and 97.5 % within 60 min for NTAC. Adsorption kinetics followed the pseudo-second-order model (0.51 mg g−1 for NAC; 0.29 mg g−1 for NTAC), suggesting chemisorption and equilibrium data fit the Sips model for NAC (R2 = 0.99 and Δqe = 0.14 %) and Langmuir model for NTAC (R2 = 0.99 and Δqe = 0.10 %), indicating heterogeneous and monolayer adsorption, respectively. The proposed mechanisms included pore-filling, electrostatic attraction, surface precipitation and complexation with niobium. These findings underscore the potential of NA-modified construction waste composites as efficient, sustainable phosphate adsorbents for wastewater treatment.http://www.sciencedirect.com/science/article/pii/S1944398625003261NutrientRemovalAerated autoclaved concreteRed ceramicWastewater treatment |
| spellingShingle | Lucas Lacerda Cabral Anna Vitória Cardoso Martins Isabele Stresser Aleluia Janete Erika Fujihara André Nagalli Fernando Hermes Passig Roberta Carolina Pelissari Rizzo-Domingues Karina Querne de Carvalho Composites of construction waste with niobic acid as a new eco-friendly alternative for phosphate adsorption Desalination and Water Treatment Nutrient Removal Aerated autoclaved concrete Red ceramic Wastewater treatment |
| title | Composites of construction waste with niobic acid as a new eco-friendly alternative for phosphate adsorption |
| title_full | Composites of construction waste with niobic acid as a new eco-friendly alternative for phosphate adsorption |
| title_fullStr | Composites of construction waste with niobic acid as a new eco-friendly alternative for phosphate adsorption |
| title_full_unstemmed | Composites of construction waste with niobic acid as a new eco-friendly alternative for phosphate adsorption |
| title_short | Composites of construction waste with niobic acid as a new eco-friendly alternative for phosphate adsorption |
| title_sort | composites of construction waste with niobic acid as a new eco friendly alternative for phosphate adsorption |
| topic | Nutrient Removal Aerated autoclaved concrete Red ceramic Wastewater treatment |
| url | http://www.sciencedirect.com/science/article/pii/S1944398625003261 |
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