Lactic acid oligomer grafted gum acacia encapsulated controlled release nitrogen fertilizer for crops improvements and greener soil sustainability

Q1 Social Sciences

South African Journal of Chemical Engineering Pub Date : 2025-04-26 DOI:10.1016/j.sajce.2025.04.017

Yihun Wasie , Selvakumar Periyasamy , Melakuu Tesfaye

{"title":"Lactic acid oligomer grafted gum acacia encapsulated controlled release nitrogen fertilizer for crops improvements and greener soil sustainability","authors":"Yihun Wasie , Selvakumar Periyasamy , Melakuu Tesfaye","doi":"10.1016/j.sajce.2025.04.017","DOIUrl":null,"url":null,"abstract":"<div><div>Nitrogen (N) is an essential nutrient for plant growth and productivity. Urea contains 46 % N, the highest content of solid nitrogenous fertilizers, but it is limited in its delivery system. In this research work, urea was encapsulated in a hydrophobic bio-adhesive, which was synthesized through a poly-condensation reaction of lactic acid (LA) and gum acacia (GA) to control its dissolution rate in water. Box-Behnken method of design expert software was used to investigate the effect of process parameters on the grafting efficiency and urea release rate. The grafting efficiency and the urea release rate were inversely proportional. The grafting of lactic acid oligomer (LAO) chains at the O<img>H and N<img>H functional groups of the GA backbone was confirmed by FTIR and NMR analyses. The solubility and hydrophobicity tests of LAO-g-GA exhibit that both increase with grafting efficiency. The study found that the urea release rate increases with the temperature of the medium and urea concentration but decreases with the increase in pH of the medium. The results observed from the study could help commercialize slow-release urea fertilizer for the effective use of nitrogen and maintain a pollution-free environment.</div></div>","PeriodicalId":21926,"journal":{"name":"South African Journal of Chemical Engineering","volume":"53 ","pages":"Pages 158-175"},"PeriodicalIF":0.0000,"publicationDate":"2025-04-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"South African Journal of Chemical Engineering","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/S1026918525000502","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"Social Sciences","Score":null,"Total":0}

引用次数: 0

Abstract

Nitrogen (N) is an essential nutrient for plant growth and productivity. Urea contains 46 % N, the highest content of solid nitrogenous fertilizers, but it is limited in its delivery system. In this research work, urea was encapsulated in a hydrophobic bio-adhesive, which was synthesized through a poly-condensation reaction of lactic acid (LA) and gum acacia (GA) to control its dissolution rate in water. Box-Behnken method of design expert software was used to investigate the effect of process parameters on the grafting efficiency and urea release rate. The grafting efficiency and the urea release rate were inversely proportional. The grafting of lactic acid oligomer (LAO) chains at the OH and NH functional groups of the GA backbone was confirmed by FTIR and NMR analyses. The solubility and hydrophobicity tests of LAO-g-GA exhibit that both increase with grafting efficiency. The study found that the urea release rate increases with the temperature of the medium and urea concentration but decreases with the increase in pH of the medium. The results observed from the study could help commercialize slow-release urea fertilizer for the effective use of nitrogen and maintain a pollution-free environment.

Abstract Image

查看原文本刊更多论文

乳酸低聚物嫁接金合欢包封控释氮肥改良作物和绿色土壤可持续性

氮是植物生长和生产所必需的营养物质。尿素含氮46%，是固体氮肥中含量最高的，但其输送系统受到限制。本研究将尿素包被在疏水生物胶中，通过乳酸（LA）和金合欢胶（GA）的缩聚反应合成了疏水生物胶，以控制其在水中的溶解速率。采用设计专家软件中的Box-Behnken方法，考察了工艺参数对接枝效率和尿素释放率的影响。接枝效率与尿素释放率成反比。乳酸低聚物（LAO）链接枝在GA主链的OH和NH官能团上，通过FTIR和NMR分析得到了证实。LAO-g-GA的溶解度和疏水性均随接枝效率的提高而提高。研究发现，尿素释放速率随培养基温度和尿素浓度的增加而增加，但随培养基pH的增加而降低。这项研究的结果可以帮助缓释尿素肥料的商业化，以有效利用氮，保持无污染的环境。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

South African Journal of Chemical Engineering Social Sciences-Education

CiteScore

8.40

自引率

0.00%

发文量

100

审稿时长

33 weeks

期刊介绍： The journal has a particular interest in publishing papers on the unique issues facing chemical engineering taking place in countries that are rich in resources but face specific technical and societal challenges, which require detailed knowledge of local conditions to address. Core topic areas are: Environmental process engineering • treatment and handling of waste and pollutants • the abatement of pollution, environmental process control • cleaner technologies • waste minimization • environmental chemical engineering • water treatment Reaction Engineering • modelling and simulation of reactors • transport phenomena within reacting systems • fluidization technology • reactor design Separation technologies • classic separations • novel separations Process and materials synthesis • novel synthesis of materials or processes, including but not limited to nanotechnology, ceramics, etc. Metallurgical process engineering and coal technology • novel developments related to the minerals beneficiation industry • coal technology Chemical engineering education • guides to good practice • novel approaches to learning • education beyond university.