Utilization of dewatered alum sludge from water treatment plants as a sustainable green roof substrate
文献类型：期刊论文
| 作者 | Chi, Yanyan4; Liu, Siyang4; Ming, Di3; Huang, Xiaoyu2; Zhang, Rong1; Yin, Keke3 |
| 刊名 | PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
 |
| 出版日期 | 2025-02-01 |
| 卷号 | 194页码:1325-1333 |
| 关键词 | Water treatment plants Dewatered alum sludge Recycling Green roof Planting substrate |
| ISSN号 | 0957-5820 |
| DOI | 10.1016/j.psep.2024.12.091 |
| 通讯作者 | Liu, Siyang(liusiyang@igsnrr.ac.cn) ; Zhang, Rong(zhangrong@tcare-mee.cn) |
| 英文摘要 | Dewatered alum sludge, utilized as a rooftop greening substrate, is closely associated with the resource utilization of water treatment plant sludge and the advancement of sponge city infrastructure. However, the feasibility and specific performance of using dewatered alum sludge in rooftop greening applications remain uncertain. In this study, alum sludge from the Qujiang Water Plant in Xi'an was used to formulate a rooftop greening substrate. The experimental substrate comprised 33 % air-dried alum sludge, 33 % coconut coir, and 33 % landscaping waste, while the control substrate consisted of 33 % sandy loam, 33 % peat, and 33 % humus, with both treatments supplemented by an appropriate amount of slow-release fertilizer. Sedum hispanicum was cultivated under natural rooftop conditions, and its growth was monitored over 13 months. Additionally, a bare roof served as the control to evaluate the effects of the rooftop greening system on rainwater retention, cooling, and dust suppression. Results showed that Sedum hispanicum performed well in the experimental substrate, achieving a 100 % rooting rate, an initial coverage rate increase of 35.49 %, and a sustained coverage of over 70 % in the later stages, with a mortality rate of less than 20 % under extreme conditions, comparable to the performance in natural soil. The rooftop greening system with the alum sludge substrate demonstrated rainwater retention capacities of 78.26 % and 40.67 %, and runoff delay times of 46.96 minutes and 24.40 minutes during artificial simulations of heavy (43.70 mm) and torrential rainfall (79.22 mm), respectively. Cooling efficiency exceeded 20 %, while dust suppression reached 73.83 %. These findings highlight the significant environmental and economic advantages of using alum sludge as a rooftop greening substrate, providing a viable strategy for the resource-efficient disposal of water treatment sludge. |
| WOS关键词 | RUNOFF RETENTION ; GROWTH |
| 资助项目 | Key Research and Development and Transformation Program of Qinghai Province[2023-QY-205] |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001402204600001 |
| 出版者 | ELSEVIER |
| 资助机构 | Key Research and Development and Transformation Program of Qinghai Province |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/212825]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Liu, Siyang; Zhang, Rong |
| 作者单位 | 1.Minist Ecol & Environm, Tech Ctr Soil Agr & Rural Ecol & Environm, Beijing 100012, Peoples R China 2.Jiangsu Normal Univ, Sch Geog Geomat & Planning, Xuzhou 221116, Peoples R China 3.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 4.Chinese Acad Environm Planning, Beijing 100041, Peoples R China |
| 推荐引用方式 GB/T 7714 | Chi, Yanyan,Liu, Siyang,Ming, Di,et al. Utilization of dewatered alum sludge from water treatment plants as a sustainable green roof substrate[J]. PROCESS SAFETY AND ENVIRONMENTAL PROTECTION,2025,194:1325-1333. |
| APA | Chi, Yanyan,Liu, Siyang,Ming, Di,Huang, Xiaoyu,Zhang, Rong,&Yin, Keke.(2025).Utilization of dewatered alum sludge from water treatment plants as a sustainable green roof substrate.PROCESS SAFETY AND ENVIRONMENTAL PROTECTION,194,1325-1333. |
| MLA | Chi, Yanyan,et al."Utilization of dewatered alum sludge from water treatment plants as a sustainable green roof substrate".PROCESS SAFETY AND ENVIRONMENTAL PROTECTION 194(2025):1325-1333. |
入库方式： OAI收割
来源：地理科学与资源研究所
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