在聚乙烯醇/淀粉水凝胶膜中加入氧化铁纳米颗粒和生物炭，增强复合肥料的缓释性能

IF 10.7 1区化学 Q1 CHEMISTRY, APPLIED

Carbohydrate Polymers Pub Date : 2024-10-09 DOI:10.1016/j.carbpol.2024.122834

Jiawei Lu , Mengqiao Wu , Linping Luo , Ruohui Lu , Jie Zhu , Yongfu Li , Yanjiang Cai , Hai Xiang , Chengfang Song , Bing Yu

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引用次数: 0

摘要

以生物炭为基础的肥料在提高养分利用率和改善土壤健康方面大有可为，但其缓释性能仍是一项挑战。在此，我们合成了在聚乙烯醇和淀粉基质（Fe/PVA/ST）中加入氧化铁纳米颗粒的水凝胶膜。利用这些膜包覆复合肥颗粒，并在外层涂上生物炭粉，形成所谓的 Fe/PVA/ST-BSRFs 。研究结果表明，与缺乏铁纳米颗粒的 PVA/ST-BSRF 和商用复合肥相比，Fe/PVA/ST-BSRF 的缓释性能明显提高。在 30 天内，铁含量为 0.75 % 的 Fe/PVA/ST-BSRF 中氮、磷和钾的累积浸出率明显低于其他测试肥料，分别为 22.87 %、34.93 % 和 84.08 %。此外，在 PVA/ST 膜中加入氧化铁纳米颗粒还能增强其膨胀和保水性能，同时不影响其生物降解性。机理研究表明，Fe/PVA/ST-BSRFs 的特殊缓释特性源于膜外营养物质扩散控制和膜的松散控制机制的结合。盆栽试验表明，Fe/PVA/ST-BSRFs 能有效促进辣椒植株的生长，同时确保 N-P-K 的高利用率，并改善辣椒果实的营养指标。经济分析进一步凸显了 Fe/PVA/ST-BSRFs 的广阔应用前景。

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Incorporating iron oxide nanoparticles in polyvinyl alcohol/starch hydrogel membrane with biochar for enhanced slow-release properties of compound fertilizers

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Incorporating iron oxide nanoparticles in polyvinyl alcohol/starch hydrogel membrane with biochar for enhanced slow-release properties of compound fertilizers

Biochar-based fertilizers show promise in enhancing nutrient utilization and soil health, but their slow-release performance remains a challenge. Herein, hydrogel membranes incorporating iron oxide nanoparticles within a polyvinyl alcohol and starch matrix (Fe/PVA/ST) were synthesized. These membranes were utilized to coat compound fertilizer particles, with biochar powder applied to the outer layer to form what is known as Fe/PVA/ST-BSRFs. The results revealed that Fe/PVA/ST-BSRFs exhibit markedly improved slow-release performance compared to both PVA/ST-BSRFs lacking iron nanoparticles and commercial compound fertilizers. Within a 30-day period, the cumulative leaching ratios of N, P, and K from Fe/PVA/ST-BSRFs with 0.75 % iron content were significantly lower compared to other tested fertilizers, with values of 22.87 %, 34.93 %, and 84.08 %, respectively. Furthermore, the incorporation of iron oxide nanoparticles into the PVA/ST membrane enhanced its swelling and water-retention properties without compromising its biodegradability. Mechanistic investigations revealed that the exceptional slow-release properties of Fe/PVA/ST-BSRFs stem from a combination of nutrient diffusion control outside the membrane and the loose control mechanism of the membrane. Pot tests demonstrated that Fe/PVA/ST-BSRFs effectively promoted the growth of chili plants while ensuring high utilization of N-P-K and improving the nutritional indices of chili fruits. Economic analysis further underscored the promising application prospects of Fe/PVA/ST-BSRFs.

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来源期刊

Carbohydrate Polymers 化学-高分子科学

CiteScore

22.40

自引率

8.00%

发文量

1286

审稿时长

47 days

期刊介绍： Carbohydrate Polymers stands as a prominent journal in the glycoscience field, dedicated to exploring and harnessing the potential of polysaccharides with applications spanning bioenergy, bioplastics, biomaterials, biorefining, chemistry, drug delivery, food, health, nanotechnology, packaging, paper, pharmaceuticals, medicine, oil recovery, textiles, tissue engineering, wood, and various aspects of glycoscience. The journal emphasizes the central role of well-characterized carbohydrate polymers, highlighting their significance as the primary focus rather than a peripheral topic. Each paper must prominently feature at least one named carbohydrate polymer, evident in both citation and title, with a commitment to innovative research that advances scientific knowledge.