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Marine waste-derived hydrochar beads for circular phosphate recovery: site energy distribution, molecular interactions and life cycle assessment
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DOI：10.1016/j.gce.2026.07.003.png)
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Abstract
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• Recyclable Mg@SHC/CS hydrogel beads were fabricated from waste seaweed, magnesite, and chitosan. • Site energy distribution analysis revealed heterogeneous binding with preferential high-energy site occupation. • DFT and IGMH calculations identified Mg–O centers, –COOH, and –NH2/–NH3+ as key active sites. • Cradle-to-gate life cycle assessment pinpointed chitosan and Mg@SHC precursor as environmental hotspots.
Keywords:
Chitosan-based composite
Hydrogel beads
Hydrochar
Phosphate recovery
Site energy distribution
Life cycle assessment
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