ArticleEnvironmental science and pollution research international2026
Struvite precipitation from source-separated human urine: mineralogical characterization, phosphorus release kinetics, and heavy metal safety assessment.
Article in Environmental science and pollution research international, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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Abstract
The recovery of phosphorus from human urine via struvite precipitation has emerged as a promising strategy for sustainable nutrient management. However, limited understanding of the materials' physicochemical properties, phosphorus speciation, and potential contamination by tracing heavy metals continues to hinder their safe application. This study addresses these gaps by systematically characterizing struvite precipitated from source-separated human urine collected from dry toilet facilities and stored at ambient temperature for six months, representing a scarcely explored effluent matrix in nutrient recovery research. The precipitation was driven by natural microbial urease activity and by the addition of magnesium oxide (MgO) without pH adjustment (Mg:P molar ratio of 1.71:2.21). The resulting solids were analyzed via X-ray diffraction (XRD), solid-state phosphorus-31 nuclear magnetic resonance
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