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|a 10.1016/j.wasman.2024.12.006
|2 doi
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|a pubmed24n1629.xml
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|a (PII)S0956-053X(24)00638-X
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|a DE-627
|b ger
|c DE-627
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|a eng
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|a Yang, Zhonghua
|e verfasserin
|4 aut
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|a Selective leaching and recovery of phosphorus from incinerated sewage sludge ash with CaO addition
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|c 2024
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|a Text
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|2 rdacontent
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|a ƒaComputermedien
|b c
|2 rdamedia
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|a ƒa Online-Ressource
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|a Date Revised 11.12.2024
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|a published: Print-Electronic
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|a Citation Status Publisher
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|a Copyright © 2024 Elsevier Ltd. All rights reserved.
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|a Incinerated sewage sludge ash (ISSA) with high P2O5 content is a potential phosphorus resource that can replace the non-renewable phosphorus rocks. However, extracting phosphorus from ISSA using hydrometallurgical methods also dissolves a large amount of impurity metals into the leachate. Therefore, this study proposes a new method combining high-temperature reaction with CaO addition, selective leaching, and chemical precipitation for efficient and low-cost phosphorus recovery from ISSA. During thermal treatment at 1050 °C, the addition of CaO significantly influenced the types and amounts of phosphate mineral phases in ISSA. When 20 % CaO was added, the Al/Fe-phosphate phases were completely converted into acid-soluble Ca-phosphate phases, while Al and Fe were retained in acid-insoluble phases (e.g., Al- and Fe-containing oxides and silicates). Subsequently, by controlling the pH of acidic leachate (2.0 to 1.5), Ca-phosphate phases were selectively dissolved. At a pH of 1.5, better selective leaching was achieved, with a leaching efficiency of 94.71 % for P and less than 10 % for Al, Fe and Si. The XRF results showed that the majority of SiO2 (38.39 %), Al2O3 (33.26 %) remained in the post-leaching solid residue, which was expected to be further resource utilization. Without purification treatment to remove Al, Fe and Si, almost all phosphate ions were precipitated at pH = 8.5, with P recovery efficiency of 94.07 %. XRD results showed that the precipitate was mainly composed of HAP, with a P2O5 content of 37.51 % and low level of contaminants, thereby realizing the effective recovery of phosphorus from ISSA
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|a Journal Article
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|a CaO addition
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|a Hydroxyapatite
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|a ISSA
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|a Phosphorus recovery
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| 650 |
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|a Selective leaching
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| 700 |
1 |
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|a Du, Chuanming
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Yuan, Ruiyuan
|e verfasserin
|4 aut
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| 700 |
1 |
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|a Guo, Haixin
|e verfasserin
|4 aut
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| 773 |
0 |
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|i Enthalten in
|t Waste management (New York, N.Y.)
|d 1999
|g 193(2024) vom: 10. Dez., Seite 143-154
|w (DE-627)NLM098197061
|x 1879-2456
|7 nnns
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| 773 |
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|g volume:193
|g year:2024
|g day:10
|g month:12
|g pages:143-154
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|u http://dx.doi.org/10.1016/j.wasman.2024.12.006
|3 Volltext
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