Preparation and ecological risk assessment of porous sewage sludge substrate for ecological restoration
Abstract Mining activities often bring great pressure to the surrounding ecological environment, so it is necessary to carry out ecological restoration in mining areas. In this study, a constructed technosol (denoted SAS) for ecological restoration was prepared with municipal sludge as main material...
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Nature Portfolio
2025-04-01
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| Series: | Scientific Reports |
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| Online Access: | https://doi.org/10.1038/s41598-025-98983-0 |
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| author | Zhenzhen Song Biwu Zhang Kai Zhou Di Su Jiyan Li Hongyu Gao |
| author_facet | Zhenzhen Song Biwu Zhang Kai Zhou Di Su Jiyan Li Hongyu Gao |
| author_sort | Zhenzhen Song |
| collection | DOAJ |
| description | Abstract Mining activities often bring great pressure to the surrounding ecological environment, so it is necessary to carry out ecological restoration in mining areas. In this study, a constructed technosol (denoted SAS) for ecological restoration was prepared with municipal sludge as main materials, and its properties and ecological risk was assessed. The results showed that the optimal conditions for preparation were as follows: raw material ratio of 0.04, water–cement ratio of 0.01, aluminum powder dosage of 0.03%, curing temperature of 40 ℃, curing time of 24 h. The solidification of cement contributed to the connection path between the sludge particles, and the bubbles generated by aluminum powder further formed the microscopic pore structure. Heavy metals chemical species analysis concluded that As, Cd and Pb were immobilized, while Cu and Ni were tended to be activated, assessment result indicated low risk level. The transformation of macromolecular organic matter into humus was beneficial to improve the structure and biological activity, and the pot experiment result also displayed the low toxicity to plants. This work enriched the research system of ecological restoration in mining areas and provides a new strategy for the recycling of municipal sludge. |
| format | Article |
| id | doaj-art-32766e94184a45c7a5c0cb4e4d87d1a4 |
| institution | OA Journals |
| issn | 2045-2322 |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Nature Portfolio |
| record_format | Article |
| series | Scientific Reports |
| spelling | doaj-art-32766e94184a45c7a5c0cb4e4d87d1a42025-08-20T02:29:38ZengNature PortfolioScientific Reports2045-23222025-04-0115111310.1038/s41598-025-98983-0Preparation and ecological risk assessment of porous sewage sludge substrate for ecological restorationZhenzhen Song0Biwu Zhang1Kai Zhou2Di Su3Jiyan Li4Hongyu Gao5Institute of Geographical Science, Taiyuan Normal UniversityInstitute of Resources and Environment Engineering, Shanxi UniversityInstitute of Resources and Environment Engineering, Shanxi UniversityInstitute of Resources and Environment Engineering, Shanxi UniversityInstitute of Geographical Science, Taiyuan Normal UniversityInstitute of Resources and Environment Engineering, Shanxi UniversityAbstract Mining activities often bring great pressure to the surrounding ecological environment, so it is necessary to carry out ecological restoration in mining areas. In this study, a constructed technosol (denoted SAS) for ecological restoration was prepared with municipal sludge as main materials, and its properties and ecological risk was assessed. The results showed that the optimal conditions for preparation were as follows: raw material ratio of 0.04, water–cement ratio of 0.01, aluminum powder dosage of 0.03%, curing temperature of 40 ℃, curing time of 24 h. The solidification of cement contributed to the connection path between the sludge particles, and the bubbles generated by aluminum powder further formed the microscopic pore structure. Heavy metals chemical species analysis concluded that As, Cd and Pb were immobilized, while Cu and Ni were tended to be activated, assessment result indicated low risk level. The transformation of macromolecular organic matter into humus was beneficial to improve the structure and biological activity, and the pot experiment result also displayed the low toxicity to plants. This work enriched the research system of ecological restoration in mining areas and provides a new strategy for the recycling of municipal sludge.https://doi.org/10.1038/s41598-025-98983-0Municipal sludgeEcological restorationEcological riskHeavy metalOrganic matterPlant toxicity |
| spellingShingle | Zhenzhen Song Biwu Zhang Kai Zhou Di Su Jiyan Li Hongyu Gao Preparation and ecological risk assessment of porous sewage sludge substrate for ecological restoration Scientific Reports Municipal sludge Ecological restoration Ecological risk Heavy metal Organic matter Plant toxicity |
| title | Preparation and ecological risk assessment of porous sewage sludge substrate for ecological restoration |
| title_full | Preparation and ecological risk assessment of porous sewage sludge substrate for ecological restoration |
| title_fullStr | Preparation and ecological risk assessment of porous sewage sludge substrate for ecological restoration |
| title_full_unstemmed | Preparation and ecological risk assessment of porous sewage sludge substrate for ecological restoration |
| title_short | Preparation and ecological risk assessment of porous sewage sludge substrate for ecological restoration |
| title_sort | preparation and ecological risk assessment of porous sewage sludge substrate for ecological restoration |
| topic | Municipal sludge Ecological restoration Ecological risk Heavy metal Organic matter Plant toxicity |
| url | https://doi.org/10.1038/s41598-025-98983-0 |
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