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Biomass Mediated Conversion of Acidic Phosphogypsum into Alkaline Material through Thermal Treatments

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Title Biomass Mediated Conversion of Acidic Phosphogypsum into Alkaline Material through Thermal Treatments
 
Creator Karim, Adnan Asad
Kumar, Manish
Ray, Arati
Hariprasad, D
Dhal, Nabin Kumar
 
Subject Banana peduncle
Fertilizer industry
Nutrients
Pyrolysis
Solid waste
 
Description 924-928
The application of phosphogypsum waste is limited to alkaline soil primarily due to its highly acidic pH. Its application can be widen for the acidic soil by converting phosphogypsum into alkaline material. In this context, conversion of acidic phosphogypsum into alkaline material by mixing banana peduncle biomass in powder form in different proportions followed by thermal pyrolysis treatments (300–700°C) were investigated. Acidic phosphogypsum pH (3.2) increased without biomass mixing to 6.3, 6.6 and 7.4 at 300, 500 and 700°C, whereas phosphogypusm-biomass-mixtures elevated pH to relatively higher values 6.7–7.2, 8.2–9.6 and 10.1–10.4 respectively. Alkaline pyrolysed material also contained carbon (25.8%), potassium (10%), and sulfur (12%) and their toxic flouride concentration was lesser (0.39%) than raw phosphogypsum (0.44%). The XRD analysis revealed formation of water soluble anhydrite, arcanite, potassium calcium sulfate and calcite mineral phases. These results established and highlights about process of conversion of phosphatic fertiliser industry acidic phosphogypsum waste to nutrient rich alkaline material by utilising banana peduncle biomass through thermal treatment. The reseach findings has implication towards phosphogypsum industrial waste management, value addition and potential for its alternative use in acidic soils.
 
Date 2021-10-05T11:37:57Z
2021-10-05T11:37:57Z
2021-10
 
Type Article
 
Identifier 0975-1084 (Online); 0022-4456 (Print)
http://nopr.niscair.res.in/handle/123456789/58225
 
Language en
 
Publisher NIScPR-CSIR, India
 
Source JSIR Vol.80(10) [October 2021]