Environment-friendly bio-based controlled-release phosphate fertilizer with waste kitchen oil as coating material: Preparation, characterization, and mechanisms

被引：11

作者：

Liu X. ^{[1
]}

Wu L. ^{[1
]}

Zhou W. ^{[1
]}

Hu L. ^{[1
]}

Lv J. ^{[1
]}

Du W. ^{[1
]}

机构：

[1] College of Natural Resources and Environment, Northwest A& F University, Yangling, Shaanxi

来源：

Journal of Environmental Management | 2022年 / 324卷

关键词：

Bio-based controlled release fertilizers; Multi-walled carbon nanotube; Superhydrophobic; Waste kitchen oils;

D O I：

10.1016/j.jenvman.2022.116409

中图分类号：

学科分类号：

摘要：

Recently, Bio-based polyurethane controlled-release fertilizers (BPCF) have been developed rapidly owing to their environmental friendliness, renewability, and low cost. However, the unsatisfying controlled release prohibits their large-scale direct application in agricultural production. Here, we prepared bio-based controlled-release phosphate (P) fertilizers using harmful waste kitchen oils (WKO) as coating materials. The membrane shell surface was modified with multi-walled carbon nanotubes (CNT), and superhydrophobic controlled-release phosphorus fertilizers (SCRF) were obtained. After CNT modification, the controlled release period of SCRF was greatly improved. Phosphorus released period of SCRF reached over 67 d while that of BPCF was merely ∼49 d. Additionally, the surface energy, cracks, roughness, microstructure, cross-linking degree, etc., of the membrane shells were measured. The results showed that CNT greatly improved the hydrophobic properties of the membrane shells. The findings indicated the application of modified WKO with great agricultural value in preparing environment-friendly BPCFs. © 2022 Elsevier Ltd

引用

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