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Transformation of apatite phosphorus and non-apatite inorganic phosphorus during incineration of sewage sludge

Li, Rundong ; Zhang, Ziheng ; Li, Yanlong ; Teng, Wenchao ; Wang, Weiyun ; Yang, Tianhua

Chemosphere (Oxford), 2015-12, Vol.141, p.57-61 [Periódico revisado por pares]

England: Elsevier Ltd

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Título:
Transformation of apatite phosphorus and non-apatite inorganic phosphorus during incineration of sewage sludge
Autor: Li, Rundong ; Zhang, Ziheng ; Li, Yanlong ; Teng, Wenchao ; Wang, Weiyun ; Yang, Tianhua
Assuntos: Aluminum Compounds - chemistry ; Apatite ; Apatite phosphorus ; Apatites - chemistry ; Calcium Compounds - chemistry ; Calorimetry, Differential Scanning ; Combustion ; Crystallization ; Ferrous Compounds - chemistry ; Forming ; Incineration ; Non-apatite inorganic phosphorus ; Oxides - chemistry ; Phosphates ; Phosphates - chemistry ; Phosphorus ; Phosphorus - analysis ; Phosphorus - chemistry ; Sewage - chemistry ; Sewage sludge ; Sewage sludge ash ; Thermogravimetric analysis–differential scanning calorimetric analysis ; Transformation ; Transformations ; X-Ray Diffraction
É parte de: Chemosphere (Oxford), 2015-12, Vol.141, p.57-61
Notas: ObjectType-Article-1
SourceType-Scholarly Journals-1
ObjectType-Feature-2
content type line 23
Descrição: •A novel approach to P recovery from sewage sludge was studied by XRD and TGA–DSC.•High temperature and CaO could effectively promote transformation from NAIP to AP.•The AP percentage in total phosphorus reaches 99% at 950°C in sewage sludge ash.•Phosphorus components emerged during the thermal treatment was measurements.•The reactions between NAIP and CaO at different temperatures were concluded. The recovery of phosphorus from incinerated sewage sludge ash (SSA) is assumed to be economical. Transformation from non-apatite inorganic phosphorus (NAIP) to apatite phosphorus (AP), which has a higher bioavailability and more extensive industrial applications, was studied at 750–950°C by sewage sludge incineration and model compound incineration with a calcium oxide (CaO) additive. Thermogravimetric differential scanning calorimetry analysis and X-ray diffraction measurements were used to analyze the reactions between NAIP with CaO and crystallized phases in SSA. High temperatures stimulated the volatilization of NAIP instead of AP. Sewage sludge incineration with CaO transformed NAIP into AP, and the percentage of AP from the total phosphorus reached 99% at 950°C. Aluminum phosphate reacted with CaO, forming Ca2P2O7 and Ca3(PO4)2 at 750–950°C. Reactions between iron phosphate and CaO occurred at lower temperatures, forming Ca(PO3)2 before reaching 850°C.
Editor: England: Elsevier Ltd
Idioma: Inglês

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Transformation of apatite phosphorus and non-apatite inorganic phosphorus during incineration of sewage sludge

Li, Rundong ; Zhang, Ziheng ; Li, Yanlong ; Teng, Wenchao ; Wang, Weiyun ; Yang, Tianhua

England: Elsevier Ltd

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