# Hydrogel beads as slow-release NH            <sub>4</sub>            <sup>+</sup>            fertilizer and reducing S and Fe in soil acidity: alginate-poly(acrylic acid)-carboxymethyl cellulose-oleic acid

https://mdr.nims.go.jp/datasets/57b26bf8-711f-4b47-9442-4026efb138dc

## File

- [Hydrogel beads as slow-release NH4  fertilizer and reducing S and Fe in soil acidity  alginate-poly acrylic acid -carboxymethyl cellulose-oleic acid_2.pdf](https://mdr.nims.go.jp/filesets/f92f4df6-8e23-46ca-8046-0d8af96e64b1/download) ([Detail](https://mdr.nims.go.jp/filesets/f92f4df6-8e23-46ca-8046-0d8af96e64b1.md))

## Id

57b26bf8-711f-4b47-9442-4026efb138dc

## Local identifier



## Visibility

open_to_public

## State

published

## Created at

2025-12-10T03:49:37.106103Z

## Updated at

2025-12-10T04:29:08.467609Z

## Published at

2026-03-23T03:27:13.679068Z

## Doi

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

## First published url

https://doi.org/10.1080/10601325.2025.2479002

## Date published

2025-05-04

## Recorded date published

2025-5-4

## Resource type

journal_article

## Manuscript type

accepted_manuscript

## Collection



## Title

- title: 'Hydrogel beads as slow-release NH            <sub>4</sub>            <sup>+</sup>            fertilizer
    and reducing S and Fe in soil acidity: alginate-poly(acrylic acid)-carboxymethyl
    cellulose-oleic acid'
  title_type: original
  lang: en

## Description

- description: 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.
  description_type: abstract
  lang: und

## Creator

- name: Endar Hidayat
  role: author
- name: Nur Ain Hannani Hamid
  role: author
- name: Nur Maisarah Mohamad Sarbani
  role: author
- name: Muhammad Aslam Mohd Safari
  role: author
- name: Mitsuru Aoyagi
  role: author
- name: Hiroyuki Harada
  role: author
- name: Sadaki Samitsu
  role: author
  orcid: https://orcid.org/0000-0002-4139-1656

## Contact agent



## Publisher

organization: Informa UK Limited

## Managing organization



## Keyword

- subject: Hydrogel beads
  schema: not_defined
- subject: sulfur and iron contamination
  schema: not_defined
- subject: immobilization
  schema: not_defined
- subject: oleic acid
  schema: not_defined
- subject: slow release fertilizer
  schema: not_defined

## Rights

- description: 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.
  identifier: http://rightsstatements.org/vocab/InC/1.0/

## Other identifier(s)



## Data origin

- data_origin_type: other

## Embargo

start_date: 2025-03-23
end_date: 2026-03-24

## Journal

- title: Journal of Macromolecular Science, Part A
  issn: '10601325'
  volume: '62'
  issue: '5'
  start_page: 410
  end_page: 418

## Conference



## Related item



## Funding



## Instrument



## Instrument operator



## Instrument managing organization



## Measurement method



## Specimen



## Chemical composition



## Structure for specimen



## Structural feature for specimen



## Specific property for specimen



## Process for specimen treatment



## Computational method



## Energy level/transition state



## Software



## Custom property



## Fileset

- id: f92f4df6-8e23-46ca-8046-0d8af96e64b1
  filename: Hydrogel beads as slow-release NH4  fertilizer and reducing S and Fe in
    soil acidity  alginate-poly acrylic acid -carboxymethyl cellulose-oleic acid_2.pdf
  content_type: application/pdf
  size: 9461516
  md5: a6da7dd4b2002bbed4a9681ee21815c0

## Thumbnail

fileset_id: f92f4df6-8e23-46ca-8046-0d8af96e64b1
filename: Hydrogel beads as slow-release NH4  fertilizer and reducing S and Fe in
  soil acidity  alginate-poly acrylic acid -carboxymethyl cellulose-oleic acid_2.pdf