Effects of different conditions tested “in vitro” on the phosphorus runoff potential of livestock manure

Xu, Fuqing; Ma, Hongzhen; Liang, Jingtao; Okopi, Solomon Inalegwu; Yang, Shaochen; Cao, Leipeng; Sun, Weimin

doi:10.1016/j.wasman.2022.05.008

Cited by 2 publications

(1 citation statement)

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“…P is a necessary element and a non-renewable resource in agroecological systems [6]. The extraction of excessive rock phosphate, which is expected to be exhausted within 70-140 years, would create a tremendous burden on the future sustainable use of P [7].…”

Section: Introductionmentioning

confidence: 99%

Effect of Pyrolysis Treatment on Phosphorus Migration and Transformation of Pig, Cow and Sheep Manure

Liu

Xiao²,

Fang

et al. 2023

Sustainability

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Pig, cow, and sheep manure (PM, CM, and SM) are inevitable byproducts of agricultural economic development. Converting them into high add-on value biochar (PMB, CMB, and SMB) via pyrolysis is an efficient resource utilization measure. Phosphorus (P) speciation analyses help ensure the practical feasibility of the P reclamation of animal manure and their derived biochar and a reduction in environmental risk. This study conducted a modified extraction procedure to separate five inorganic P (IP) (soluble and loosely bound IP, aluminum-bound IP, Fe-bound IP, oxide-occluded IP, and Ca-bound IP) and organic P (OP) speciations, and combined X-ray diffraction (XRD) to investigate the major phosphate compound in the derived biochar after pyrolysis. Results revealed that more than 92% of P is concentrated in the derived biochar during pyrolysis processes carried out at 200–800 °C. The percentages of soluble and loosely bound IP, aluminum-bound IP, and OP in manure decreased significantly due to their transformation into more stable P fractions such as Ca-bound IP (79.01% in PMB, 800 °C) after pyrolysis. The Olsen-P percentages had a distinct reduction at 650 °C, indicating that pyrolysis at 650 °C was the optimal condition for the reduction in Olsen-P in manure.

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Section: Introductionmentioning

confidence: 99%