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

Liu, Xiaoqi; Wu, Lulu; Zhou, Wei; Hu, Liang; Lv, Jialong; Du, Wei

doi:10.1016/j.jenvman.2022.116409

Cited by 4 publications

(3 citation statements)

References 36 publications

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“…Therefore, these materials must be replaced by environmentally friendly polymers, particularly biodegradable polymers and recycled materials, to reduce environmental damage. Liu et al [ 17 ] coated a phosphate fertilizer with waste cooking oil and modified its surface with carbon nanotubes to enhance the hydrophobicity of the film; the release cycle of the phosphate fertilizer reached more than 67 days. However, CRFs coated with natural polymer material film exhibit a short service life.…”

Section: Introductionmentioning

confidence: 99%

Release and Degradation Mechanism of Modified Polyvinyl Alcohol-Based Double-Layer Coated Controlled-Release Phosphate Fertilizer

Sun,

Zhan,

Wang

et al. 2024

Polymers

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This study aims to improve the slow-release performance of a film material for a controlled-release fertilizer (CRF) while enhancing its biodegradability. A water-based biodegradable polymer material doped with biochar (BC) was prepared from modified polyvinyl alcohol (PVA) with polyvinylpyrrolidone (PVP) and chitosan (CTS), hereinafter referred to as PVA/PVP–CTSaBCb. An environmentally friendly novel controlled-release phosphate fertilizer (CRPF) was developed using PVA/PVP-CTS8%BC7% as the film. The effect of the PVA/PVP-CTS8%BC7% coating on the service life of the CRPF was investigated. The film was characterized via stress–strain testing, SEM, FTIR, XRD, and TGA analyses. The addition of the CTS modifier increased the stress of PVA/PVP-CTS8% by 7.6% compared with that of PVA/PVP owing to the decrease in the crystallinity of PVP/PVP-CTS8%. The hydrophilic –OH groups were reduced due to the mixing of CTS and PVA/PVP. Meanwhile, the water resistance of the PVA/PVP-CTS8%BC7% was improved. And the controlled-release service life of the CRPF was prolonged. Moreover, the addition of BC increased the crystallinity of the PVA/PVP-CTS8% by 10%, reduced the fracture elongation of the material, and further improved the biodegradability of the PVA/PVP-CTS8%BC7%. When the amount of BC added was 7%, the phosphorus release rate of the CRPF was 30% on the 28th day. Moreover, the degradation rate of the PVA/PVP-CTS8%BC7% polymer film was 35% after 120 days. This study provides basic data for applying water-based degradable polymer materials in CRFs.

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Section: Introductionmentioning

confidence: 99%

Release and Degradation Mechanism of Modified Polyvinyl Alcohol-Based Double-Layer Coated Controlled-Release Phosphate Fertilizer

Sun,

Zhan,

Wang

et al. 2024

Polymers

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“…Controlled release is an effective means to achieve targeted transport of substances. [1][2][3][4][5] A precisely targeted release can not only give full play to the role of the carrier, but also avoid pollution caused by improper release (such as the toxic and side effects of drugs 6,7 ). The methods to control the release can be to apply external stimuli (such as pH, temperature, light, electric field, magnetic field, etc.…”

Section: Introductionmentioning

confidence: 99%

Fabrication, encapsulation and controlled release of multilayer capsule based on thermosensitivity and host‐guest interaction

Wang,

Liu,

et al. 2024

J of Applied Polymer Sci

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As an efficient means of material carrying, multilayer capsules are widely used in medicine, agriculture, food safety and other fields. Here, we report a kind of temperature‐triggered multilayer capsule with chitosan‐sodium dodecyl benzene sulfonate (CS‐SDBS) as the shell and gelatin bead containing α‐cyclodextrin (α‐CD@gelatin) as the core. The α‐CD@gelatin/CS‐SDBS multilayer capsules can simultaneously encapsulate various substances, such as drugs, fluorescent materials, and nanoparticles. The encapsulated substances do not interfere with each other because they are located in different layers. Both the temperature‐sensitive property of gelatin and the host‐guest interaction between α‐CD and SDBS are utilized to achieve temperature‐controlled release of substances in the multilayer capsules. The release rate can be adjusted by the α‐CD amount in the gelatin beads. The controlled drug release and chemical detection of the multilayer capsules are studied with sodium salicylate, iodine, and purple cabbage pigment as the carriers. The results show that the α‐CD@gelatin/CS‐SDBS multilayer capsules have excellent capabilities of encapsulation and controlled release, which are beneficial for their application in the fields of substance encapsulation, drug‐controlled release, and chemical detection.

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“…Liu et al [19] developed a slow-release phosphate fertilizer using coatings derived from waste cooking oil. Cooking oils were used as substrates to obtain polyurethane coatings, which were modified by multi-walled carbon nanotubes.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of Kitchen Waste Recycling as Organic N-Fertiliser for Sustainable Agriculture under Cool and Warm Seasons

et al. 2023

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Kitchen waste could be processed and recycled into safe fertilizers/soil improvers for sustainable agriculture through different methods: (1) Dried pellets from model kitchen waste treated with anaerobic effective microorganisms; and (2) Anaerobically digested kitchen waste. For comparison, a commercial mineral fertilizer was used. These methods were applied in two separate glasshouse experiments: one under cool (mainly winter) conditions (X–IV) and one under warm (mainly summer) conditions (VI–X) consisting of 3–4 subsequent harvests in northern Poland. Comparing the food waste agronomic performance after anaerobic digestion and effective microorganism treatments, especially under different climatic conditions, is a novel approach. Kitchen waste served as a much better fertilizer than mineral fertilizer, but only during the cool season. In addition, it provided 20–40% more plant yields for dosages >120 kg N/ha and a similar N uptake. In the warm season, in comparison to effective microorganism-incubated kitchen waste, its anaerobic digestion improved the relative agronomic effectiveness twice after 30 days of growth (82% versus 43%). However, the total effectiveness for anaerobically digested kitchen waste versus pelleted and effective microorganism-incubated kitchen waste was 32% versus 27% (N utilization-wise) and 36% versus 21% (plant biomass yield-wise). The Monod kinetic model was applied for the internal efficiency of N utilization; for the best fitting procedure, R2 > 0.96 for the cool season and R2 > 0.92 for the warm season. Kitchen waste introduced to the soil provided better soil properties than mineral fertilizer. The study contributes to the biological systems for waste recycling in agriculture, bioproduction processes, and the global food chain.

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

Cited by 4 publications

References 36 publications

Release and Degradation Mechanism of Modified Polyvinyl Alcohol-Based Double-Layer Coated Controlled-Release Phosphate Fertilizer

Release and Degradation Mechanism of Modified Polyvinyl Alcohol-Based Double-Layer Coated Controlled-Release Phosphate Fertilizer

Fabrication, encapsulation and controlled release of multilayer capsule based on thermosensitivity and host‐guest interaction

Evaluation of Kitchen Waste Recycling as Organic N-Fertiliser for Sustainable Agriculture under Cool and Warm Seasons

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