Authors
Yuan Fan, Yueyan Gu, Kezhou Yan, Yanxia Guo
Published in
Journal of environmental management. Volume 412. Pages 130237. Jun 19, 2026. Epub Jun 19, 2026.
Abstract
The concurrent accumulation of industrial solid residues and livestock waste presents a persistent environmental challenge, underscoring the need for circular economy strategies that integrate co-treatment with resource recovery. This study proposes an integrated "adsorption-transformation" framework, utilizing coal gasification slag (CGS) to recover dissolved organic matter (DOM) from livestock wastewater, followed by the upcycling of the spent adsorbent into a soil-like substrate. Adsorption assays revealed a 35% DOM removal efficiency, driven primarily by pore-filling and surface complexation. A fine-to-coarse CGS mass ratio of 2:1 was identified as optimal for maximizing DOM capture, demonstrating preferential selectivity for humic acid-like fractions. Subsequently, the DOM-adsorbed CGS was blended with livestock manure digestate at an 8:2 ratio to formulate a soil-like substrate. Compared to raw amendments, this soil-like substrate exhibited enhanced structural stability, superior nutrient retention, and a higher degree of humification. Greenhouse pot trials using ryegrass (Lolium perenne L.) confirmed the substrate's agronomic safety and efficacy, evidenced by significantly improved plant biomass, photosynthetic activity, and oxidative stress tolerance without detectable phytotoxicity. This closed-loop approach provides a pragmatic and scalable pathway for the synergistic valorization of multi-source wastes, offering a sustainable alternative for soil reclamation and waste management.
PMID:
42320205
Bibliographic data and abstract were imported from PubMed on 20 Jun 2026.
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