Modified iron phosphate/polyvinyl alcohol composite film for controlled-release fertilisers.

ABSTRACT: Traditional soluble phosphorous (P) fertilisers can be easily leached to pollute water systems, resulting in water eutrophication, a major environmental problem from the oversupply of unused nutrients. One innovative solution is to control the release of P upon demands of the plants. This study established a new concept of controlled-release P fertiliser via incorporation of ferric phosphate (FePO₄) as a P source in polyvinyl alcohol (PVA) films, which can immobilise the FePO₄ particles and stimuli-responsively accelerate their release rate in the presence of citric acid. More importantly, FePO₄ used in this work originated from steelmaking slag as a potential waste reuse. Due to the low solubility of FePO₄, diethylamine was introduced to

SUBMITTER: Zhang Y 

PROVIDER: S-EPMC9080590 | biostudies-literature | 2018 May

REPOSITORIES: biostudies-literature