Chitosan-Montmorillonite microspheres: A sustainable fertilizer delivery system

Santos, Bruna Rodrigues dos; Bacalhau, Fabiana Britti; Pereira, Tamires dos Santos; Souza, Claudinei Fonseca; Faez, Roselena

doi:10.1016/j.carbpol.2015.03.064

Cited by 121 publications

(63 citation statements)

References 27 publications

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“…However, in this treatment, the availability of fertilizer was always observed to remain below the concentrations of the treatment with microspheres throughout the two cycles, which shows a reflection of the losses occurred at the beginning of the first cycle. In the first cycle, the losses of the treatment with microspheres were lower at 0.132 dS m -1 , being justified by a nutrient release around the microspheres (Santos et al, 2015). After the losses, nutrient distribution behaved regularly and constantly during the different culture cycles.…”

Section: Resultsmentioning

confidence: 86%

“…Lettuce seedlings of the "Vanda" variety were used. The microspheres were prepared according to Santos et al (2015), with microsphere KNO3 content of 18%. Simple superphosphate fertilizer was used for the basic phosphate fertilization.…”

Section: Methodsmentioning

confidence: 99%

“…TDR has been seen as a useful tool for evaluating whether there is the release of encapsulated fertilizers (Santos et al, 2015). Messa et al (2016) successfully used the TDR technique to determine the actual nutrient-release profile using chitosan-clay hybrids for the release of fertilizer potassium nitrate.…”

Section: Introductionmentioning

confidence: 99%

“…According to Santos et al (2015), slow release fertilizers provide nutrients to plants gradually, thus requiring less frequency of inputs application, reducing labor costs for fertilizer installment, avoiding injuries to plant seeds and roots resulting from excessive applications, and being less susceptible to losses, which minimizes the risk of environmental pollution.…”

Section: Introductionmentioning

confidence: 99%

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In Situ Monitoring of a Controlled Release of Fertilizers in Lettuce Crop

et al. 2017

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Agriculture has sought ways to increase food production to meet global demands, intensifying dependence on natural resources. An alternative for intensive production has relied on the use of "smart" fertilizers that release nutrients in a controlled manner. Biodegradable polymers containing fertilizers has presented economic and environmental advantages when applied to the soil, as they release water and nutrients gradually to the environment without leaving residues. The objective of this study was to monitor the behavior of chitosan-clay hybrid microspheres, used as potassium nitrate soil ferti-releaser in lettuce cultivation. The experiment consisted of two treatments: (i) application of ferti-releasing chitosan-clay microspheres and (ii) use of conventional fertilization. Both treatments were monitored with TDR probes to measure electrical conductivity and soil moisture. The results indicate that both moisture and electrical conductivity are higher in soils treated with the ferti-releasing material. In addition, there was a gradual and homogenous release if compared to the conventional fertilization. The statistical analysis showed that the microspheres were efficient mainly for the controlled nitrogen release.

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Section: Resultsmentioning

confidence: 86%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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In Situ Monitoring of a Controlled Release of Fertilizers in Lettuce Crop

et al. 2017

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“…Previous results indicated that the release duration and burst release could be effectively improved by integrating Mt with polymers to form nanocomposites or microspheres. [21][22][23][24][25] Meanwhile, Mt is a 2:1 type swelling phyllosilicate with fine grain and large interlayer-planar spacing, which can allow cationic drug molecules intercalating into this space through ion-exchange method. It was reported that Mt intercalated with 5-fluorouracial and ibuprofen effectively improved the sustained release and loading capacity of drug molecules.…”

Section: Introductionmentioning

confidence: 99%

Controlled drug delivery for glaucoma therapy using montmorillonite/Eudragit microspheres as an ion-exchange carrier

Tian

et al. 2018

IJN

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Background Glaucoma is a serious eye disease that can lead to loss of vision. Unfortunately, effective treatments are limited by poor bioavailability of antiglaucoma medicine due to short residence time on the preocular surface. Materials and methods To solve this, we successfully prepared novel controlled-release ion-exchange microparticles to deliver betaxolol hydrochloride (BH). Montmorillonite/BH complex (Mt-BH) was prepared by acidification-intercalation, and this complex was encapsulated in microspheres (Mt-BH encapsulated microspheres [BMEMs]) by oil-in-oil emulsion–solvent evaporation method. The BH loaded into ion-exchange Mt was 47.45%±0.54%. After the encapsulation of Mt-BH into Eudragit microspheres, the encapsulation efficiency of BH into Eudragit microspheres was 94.35%±1.01% and BH loaded into Eudragit microspheres was 14.31%±0.47%. Results Both Fourier transform infrared spectra and X-ray diffraction patterns indicated that BH was successfully intercalated into acid-Mt to form Mt-BH and then Mt-BH was encapsulated into Eudragit microspheres to obtain BMEMs. Interestingly, in vitro release duration of the prepared BMEMs was extended to 12 hours, which is longer than both of the BH solution (2.5 hours) and the conventional BH microspheres (5 hours). Moreover, BMEM exhibited lower toxicity than that of BH solution as shown by the results of cytotoxicity tests, chorioallantoic membrane-trypan blue staining, and Draize rabbit eye test. In addition, both in vivo and in vitro preocular retention capacity study of BMEMs showed a prolonged retention time. The pharmacodynamics showed that BMEMs could extend the drug duration of action. Conclusion The developed BMEMs have the potential to be further applied as ocular drug delivery systems for the treatment of glaucoma.

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Recent Developments in Bio‐Based Materials for Controlled‐Release Fertilizers

Laohhasurayotin¹,

Yiamsawas²

2022

High‐Performance Materials From Bio‐based Feedstocks

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Chitosan-Montmorillonite microspheres: A sustainable fertilizer delivery system

Cited by 121 publications

References 27 publications

In Situ Monitoring of a Controlled Release of Fertilizers in Lettuce Crop

In Situ Monitoring of a Controlled Release of Fertilizers in Lettuce Crop

Controlled drug delivery for glaucoma therapy using montmorillonite/Eudragit microspheres as an ion-exchange carrier

Recent Developments in Bio‐Based Materials for Controlled‐Release Fertilizers

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