Techno-economic aspects of concrete lightweighting by char enrichment with phosphates from wastewater
Portland cement (PC) production is a major contributor to environmental pollution due to its resource and energy – intensive nature, ranking as the 3rd largest source. Humans excrete approximately 5 g of phosphorus (P) day-1, which is often precipitated by salts into hardly applicable minerals such...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-05-01
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| Series: | Chemical Engineering Journal Advances |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2666821125000092 |
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| author | Josef Marousek Beata Gavurova Anna Marouskova Babak Minofar |
| author_facet | Josef Marousek Beata Gavurova Anna Marouskova Babak Minofar |
| author_sort | Josef Marousek |
| collection | DOAJ |
| description | Portland cement (PC) production is a major contributor to environmental pollution due to its resource and energy – intensive nature, ranking as the 3rd largest source. Humans excrete approximately 5 g of phosphorus (P) day-1, which is often precipitated by salts into hardly applicable minerals such as struvite (in developed countries) or contributes to eutrophication (in developing countries). Worldwide, biogas plants produce a billion tons of digestate daily. Proposed solutions involve dewatering, charring and activation of digestate that is subsequently used to sorb P from wastewater and used as a PC substitute. Unique laboratory findings indicate that iron phosphates (FeP) on charred digestate can enhance concrete strength parameters (up to 80 %); reducing weight (- 18 %) and production cost (- 4 %) while turning carbon emissions into carbon sequestration. The mechanisms behind the experimental results are investigated through molecular modeling. It is revealed that interactions of char and FeP enhance aggregates, forming stronger contact ion pairs and increasing concrete strength and durability. Although the concept brings many technical, economic, and environmental improvements, further analyses are needed, especially regarding scaling up and the durability of the concrete. |
| format | Article |
| id | doaj-art-157be1ded22d49e0a1db6a89a59a7744 |
| institution | Kabale University |
| issn | 2666-8211 |
| language | English |
| publishDate | 2025-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Chemical Engineering Journal Advances |
| spelling | doaj-art-157be1ded22d49e0a1db6a89a59a77442025-02-12T05:32:58ZengElsevierChemical Engineering Journal Advances2666-82112025-05-0122100712Techno-economic aspects of concrete lightweighting by char enrichment with phosphates from wastewaterJosef Marousek0Beata Gavurova1Anna Marouskova2Babak Minofar3Technical University of Košice, Faculty of Mining, Ecology, Process Control and Geotechnologies, Letná 1/9 042 00, Košice-Sever, Slovak Republic; University of South Bohemia in České Budějovice, Faculty of Agriculture and Technology, Studentská 1668, České Budějovice 370 05, Czech Republic; Corresponding authors.Technical University of Košice, Faculty of Mining, Ecology, Process Control and Geotechnologies, Letná 1/9 042 00, Košice-Sever, Slovak RepublicTechnical University of Košice, Faculty of Mining, Ecology, Process Control and Geotechnologies, Letná 1/9 042 00, Košice-Sever, Slovak Republic; University of South Bohemia in České Budějovice, Faculty of Economics, Studentská 13, České Budějovice 370 05, Czech RepublicUniversity of Lodz, Faculty of Chemistry, Department of Physical Chemistry, Pomorska 163/165, Lodz 90-236, Poland; Corresponding authors.Portland cement (PC) production is a major contributor to environmental pollution due to its resource and energy – intensive nature, ranking as the 3rd largest source. Humans excrete approximately 5 g of phosphorus (P) day-1, which is often precipitated by salts into hardly applicable minerals such as struvite (in developed countries) or contributes to eutrophication (in developing countries). Worldwide, biogas plants produce a billion tons of digestate daily. Proposed solutions involve dewatering, charring and activation of digestate that is subsequently used to sorb P from wastewater and used as a PC substitute. Unique laboratory findings indicate that iron phosphates (FeP) on charred digestate can enhance concrete strength parameters (up to 80 %); reducing weight (- 18 %) and production cost (- 4 %) while turning carbon emissions into carbon sequestration. The mechanisms behind the experimental results are investigated through molecular modeling. It is revealed that interactions of char and FeP enhance aggregates, forming stronger contact ion pairs and increasing concrete strength and durability. Although the concept brings many technical, economic, and environmental improvements, further analyses are needed, especially regarding scaling up and the durability of the concrete.http://www.sciencedirect.com/science/article/pii/S2666821125000092WastewaterCircular economyCementConcretePhosphates |
| spellingShingle | Josef Marousek Beata Gavurova Anna Marouskova Babak Minofar Techno-economic aspects of concrete lightweighting by char enrichment with phosphates from wastewater Chemical Engineering Journal Advances Wastewater Circular economy Cement Concrete Phosphates |
| title | Techno-economic aspects of concrete lightweighting by char enrichment with phosphates from wastewater |
| title_full | Techno-economic aspects of concrete lightweighting by char enrichment with phosphates from wastewater |
| title_fullStr | Techno-economic aspects of concrete lightweighting by char enrichment with phosphates from wastewater |
| title_full_unstemmed | Techno-economic aspects of concrete lightweighting by char enrichment with phosphates from wastewater |
| title_short | Techno-economic aspects of concrete lightweighting by char enrichment with phosphates from wastewater |
| title_sort | techno economic aspects of concrete lightweighting by char enrichment with phosphates from wastewater |
| topic | Wastewater Circular economy Cement Concrete Phosphates |
| url | http://www.sciencedirect.com/science/article/pii/S2666821125000092 |
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