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A study was conducted on slow-release NH4+ fertilizer (SRNH4F) embedded in a hydrogel bead matrix consisted of sodium alginate, poly(acrylic acid), and carboxymethyl cellulose, both without (SPC-A) and with (SPC-B) the incorporation of oleic acid. The results demonstrated that SPC-B exhibited higher specific surface area, pore volume and a greater abundance of COOH functional groups. Swelling behavior analysis indicated that all samples achieved their highest swelling in NaOH solution. The SRNH4F release studies revealed that the inclusion of oleic acid significantly reduced NH4+ release, enabling more controlled NH4+ ion delivery in water, while also contributing to reduced CO2 emissions from soil, consistent with the observed trends in soil organic carbon levels. Furthermore, the treatment with hydrogel beads resulted in a significant increase (p ≤ 0.05) in soil available phosphorus, soil cation exchange capacity, exchangeable calcium, and available ammonium nitrogen. The immobilization rates in soil were satisfactory, reaching up to 93.36% for sulfur and 88.33% for iron with SPC-B. This technique demonstrated multifunctionality in improving nutrient management and mitigating environmental pollution.

権利情報:

• In Copyright
  

  This is an Accepted Manuscript of an article published by Taylor & Francis in Journal of Macromolecular Science, Part A on 23 Mar 2025, available at:　https://doi.org/10.1080/10601325.2025.2479002.

キーワード: Hydrogel beads, sulfur and iron contamination, immobilization, oleic acid, slow release fertilizer

刊行年月日: 2025-05-04

出版者: Informa UK Limited

掲載誌:

• Journal of Macromolecular Science, Part A (ISSN: 10601325) vol. 62 issue. 5 p. 410-418

研究助成金:

原稿種別: 著者最終稿 (Accepted manuscript)

MDR DOI: https://doi.org/10.48505/nims.5986

公開URL: https://doi.org/10.1080/10601325.2025.2479002

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更新時刻: 2025-12-10 13:29:08 +0900

MDRでの公開時刻: 2026-03-23 12:27:13 +0900