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pH-Responsively Water-Retaining Controlled-Release Fertilizer Using Humic Acid Hydrogel and Nano-Silica Aqueous Dispersion

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A pH-responsively controlled-release fertilizer was prepared using humic acid (HA) hydrogel, Nanosilica aqueous dispersion (NSAD) and sodium alginate (SA). Therein, the NSAD was modified with HA owning a variety of reactive groups and good compatibility by the hydrogen bonding and playing a skeleton supporting role in the entire structural system, SA was soluble in alkaline environments thus releasing the HA. The facts showed that the gel fertilizer had a good controlled release effect and the HA was released organically in alkaline environments through structural characterization and controlled release mechanism experiments. The application test showed that the humic acid sustained-release fertilizer has obvious improvement effect on saline-alkali soil.
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Keywords: Controlled-Release; Humic Acid Gel Fertilizer; Nano-Silica Aqueous Dispersion; Saline-Alkali Soil; pH-Responsively

Document Type: Research Article

Affiliations: College of Chemistry and Chemical Engineering, Shaanxi University of Science & Technology, Xi’an 710021, China

Publication date: April 1, 2020

More about this publication?
  • Journal for Nanoscience and Nanotechnology (JNN) is an international and multidisciplinary peer-reviewed journal with a wide-ranging coverage, consolidating research activities in all areas of nanoscience and nanotechnology into a single and unique reference source. JNN is the first cross-disciplinary journal to publish original full research articles, rapid communications of important new scientific and technological findings, timely state-of-the-art reviews with author's photo and short biography, and current research news encompassing the fundamental and applied research in all disciplines of science, engineering and medicine.
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