Sorption-Desorption of Phosphorus on Manure- and Plant-Derived Biochars at Different Pyrolysis Temperatures

Nighet Musa, Khalid Saifullah Khan (), Joseph C. Blankinship, Shahzada Sohail Ijaz, Zahid Akram, Mona S. Alwahibi, Mohammad Ajmal Ali and Munazza Yousra
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Nighet Musa: Institute of Soil and Environmental Sciences, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan
Khalid Saifullah Khan: Institute of Soil and Environmental Sciences, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan
Joseph C. Blankinship: Department of Environmental Science, The University of Arizona, Tucson, AZ 85719, USA
Shahzada Sohail Ijaz: Institute of Soil and Environmental Sciences, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46300, Pakistan
Zahid Akram: Department of Plant Breeding and Genetics, Pir Mehr Ali Shah Arid Agriculture University, Rawalpindi 46000, Pakistan
Mona S. Alwahibi: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Mohammad Ajmal Ali: Department of Botany and Microbiology, College of Science, King Saud University, Riyadh 11451, Saudi Arabia
Munazza Yousra: Land Resources Research Institute, National Agricultural Research Centre, Islamabad 45500, Pakistan

Sustainability, 2024, vol. 16, issue 7, 1-13

Abstract: Sustainable phosphorus (P) management is essential to preventing mineral fertilizer losses, reducing water pollution, and addressing eutrophication issues. Phosphorus sorption and mobility are strongly influenced by the properties of biochar, which are determined by pyrolysis temperature and type of feedstock. This understanding is crucial for optimizing biochar application for soil nutrient management. Therefore, a batch sorption-desorption experiment was conducted to examine P sorption-desorption in plant-based (parthenium, corn cobs) and manure-based (farmyard manure, poultry manure) biochars prepared at both 400 °C and 600 °C. Manure-based biochars demonstrated higher P sorption at 400 °C, with less sorption at 600 °C, while plant-based counterparts exhibited lower sorption capacities. Phosphorus desorption, on the other hand, increased at 600 °C, particularly in manure-based biochars. The scanning electron microscopy (SEM) and Fourier-transform infrared spectra (FTIR) analysis suggested that a lower pyrolysis temperature (400 °C) enhances P sorption due to higher specific surface area and different functional groups. Additionally, the manure-based biochars, which were enriched with calcium (Ca) and magnesium (Mg), contributed to increased P sorption. In summary, P sorption is enhanced by a lower carbonization (400 °C) temperature. Although manure-based biochars excel in retaining P, their effectiveness is limited to shorter durations. In contrast, plant-based biochars showcase a prolonged capacity for P retention.

Keywords: sorption and desorption; biomass; waste management; pyrolysis temperature; sustainable agriculture; wastewater management (search for similar items in EconPapers)
JEL-codes: O13 Q Q0 Q2 Q3 Q5 Q56 (search for similar items in EconPapers)
Date: 2024
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