Entrapment of nano-ZnO into alginate/polyvinyl alcohol beads with different crosslinking ions for fertilizer applications

Knijnenburg, Jesper T.N.; Kasemsiri, Pornnapa; Amornrantanaworn, Kamonit; Suwanree, Siraprapa; Iamamornphan, Wimonporn; Chindaprasirt, Prinya; Jetsrisuparb, Kaewta

doi:10.1016/j.ijbiomac.2021.03.138

Cited by 22 publications

(13 citation statements)

References 42 publications

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“…The spectrum of calcium alginate (Zn0 sample) shows the characteristic peaks at 820 cm –1 related to CH bending, 1023 cm –1 related to CCH and COH bending, and 1079 cm –1 associated with CO and CCC stretching. The peaks at 1412 and 1587 cm –1 can be ascribed to the stretching vibration of the COO carboxylate groups (symmetric and asymmetric, respectively), and the wide peak between 3000 and 3500 cm –1 is related to OH stretching vibration. , As expected, alginate hydrogels crosslinked with both Ca 2+ and Zn 2+ show the location of the peak at similar positions, although some peaks are slightly shifted due to the different binding character of Ca and Zn ions, as reported previously. , Thus, no displacement was found in the band 3000–3500 cm –1 and the peak at 820 cm –1 . However, a slight shift to lower wavenumber was found in the stretching vibration of symmetric carboxylate groups (1410 cm –1 ) and CCH and COH bending (1021 cm –1 ) in samples Zn0.01 and Zn0.1, respectively, which were prepared with higher amount of Zn in the crosslinking solution.…”

Section: Resultssupporting

confidence: 83%

“…20,22 As expected, alginate hydrogels crosslinked with both Ca 2+ and Zn 2+ show the location of the peak at similar positions, although some peaks are slightly shifted due to the different binding character of Ca and Zn ions, as reported previously. 20,23 Thus, no displacement was found in the band 3000−3500 cm −1 and the peak at 820 cm −1 . However, a slight shift to lower wavenumber was found in the stretching vibration of symmetric carboxylate groups (1410 cm −1 ) and CCH and COH bending (1021 cm −1 ) in samples Zn0.01 and Zn0.1, respectively, which were prepared with higher amount of Zn in the crosslinking solution.…”

Section: ■ Introductionsupporting

confidence: 84%

“…This displacement may be related to the different binding of Ca and Zn to the M, G, and MG blocks of the alginate chains. 20,22 Toxicological and Proliferation Study. The MTT study was performed to study the viability of human keratinocyte HaCaT cells in the presence of the film extracts for 24, 72, and 96 h (Figure 5).…”

Section: ■ Introductionmentioning

confidence: 99%

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Biocompatible Alginate Film Crosslinked with Ca²⁺ and Zn²⁺ Possesses Antibacterial, Antiviral, and Anticancer Activities

et al. 2023

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Alginate is a highly promising biopolymer due to its non-toxic and biodegradable properties. Alginate hydrogels are often fabricated by cross-linking sodium alginate with calcium cations and can be engineered with highly desirable enhanced physical and biological properties for biomedical applications. This study reports on the anticancer, antiviral, antibacterial, in vitro, and in vivo toxicity, water absorption, and compound release properties of an alginate hydrogel crosslinked with calcium and different amounts of zinc cations. The results showed that the calcium alginate hydrogel film crosslinked with the highest amount of zinc showed similar water sorption properties to those of calcium alginate and released a suitable amount of zinc to provide anticancer activity against melanoma and colon cancer cells and has antibacterial properties against methicillin-resistant Staphylococcus epidermidis and antiviral activity against enveloped and non-enveloped viruses. This film is non-toxic in both in vitro in keratinocyte HaCaT cells and in vivo in the Caenorhabditis elegans model, which renders it especially promising for biomedical applications.

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Section: Resultssupporting

confidence: 83%

Section: ■ Introductionsupporting

confidence: 84%

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Biocompatible Alginate Film Crosslinked with Ca²⁺ and Zn²⁺ Possesses Antibacterial, Antiviral, and Anticancer Activities

et al. 2023

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“…Phase identification was done using QualX2.0 software (version 2.24) [21]. Fourier Transform Infrared (ATR-FTIR) spectra were collected on a Bruker TENSOR27 in the range 600 cm -1 to 4000 cm -1 by accumulating 32 scans with resolution 2 cm -1 [22]. Scanning electron microscopy (SEM) images were taken on a Hitachi SU3800.…”

Section: Biochar Characterizationmentioning

confidence: 99%

Synthesis and phosphate adsorption performance of elephant dung biochar modified with magnesium and iron

et al. 2022

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The large production volume combined with the high lignocellulose content makes elephant dung an attractive and underutilized biomass resource, but also presents waste management problems for elephant orphanages. This study explored the conversion of elephant dung into biochars by slow pyrolysis at 500°C for the recovery of phosphate. The unmodified biochar (BC500) had a specific surface area (SBET) of 62.5 m2×g-1 with point of zero charge (pHPZC) of 7.7. Biochar modification with MgCl2 (MgBC500) and FeCl3 (FeBC500) by pre-pyrolysis treatment affected the SBET (48.7 m2×g-1 and 259.4 m2×g-1, respectively) and pHPZC (8.7 and 3.3, respectively). In FeBC500, Fe was present as magnetite (Fe3O4) and hematite (α-Fe2O3) as confirmed by X-ray diffraction. Instead of adsorption, both BC500 and MgBC500 released phosphate at pH 3-6. Phosphate adsorption onto FeBC500 reached equilibrium within 24 h and followed pseudo-second order kinetics. The adsorption isotherm was best described with the Langmuir equation with a maximum adsorption capacity of 0.744 mg-P×g-1. The phosphate adsorption behavior was related to the pHPZC and metal content of the biochar. Conversion of elephant dung into biochar presents an environmentally friendly waste management solution that may find further applications in the adsorption of other nutrients or pollutants.

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“…In addition to their capacity for water retention, hydrogels, such as carboxymethyl cellulose [ 9 ], nanocomposites [ 7 ], or polyacrylamide [ 43 , 44 ] have been investigated for their use in slow-release fertilizer development. Alginate-based hydrogels also offer this opportunity, and some research has been done in the literature on the development of alginate-based hydrogels (occasionally mixed with other materials) that slowly release, for instance, pesticides [ 45 ], biocontrol agents [ 46 ], micronutrients [ 47 , 48 ], nitrogen-potassium-phosphorous fertilizers [ 49 ], or urea [ 50 , 51 ]. However, there has been little research done on the use of alginate hydrogels formulated for fertilizer release.…”

Section: Introductionmentioning

confidence: 99%

Macroalgal-Derived Alginate Soil Amendments for Water Retention, Nutrient Release Rate Reduction, and Soil pH Control

Merwe

Goosen

Pott

2022

Gels

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There is a need to develop sustainably sourced products that can address the needs for improved water retention in soils, slow the release rate of fertilizers (to prevent leaching and downstream eutrophication), and control soil pH for use in agriculture. This article investigates the use of industrial kelp solid waste extracted alginate (IW) slurries to produce soil amendment beads, potentially improving soil water retention, acting as slow-release fertilizers (SRFs), and combined with limestone controls soil pH levels. Alginate extracted from the IW was determined to have a lower guluronic (G) to mannuronic (M) acid ratio than pure laboratory-grade (LG) alginate (0.36 vs. 0.53). Hydrogels produced from the IW alginate achieved significantly higher equilibrium swelling ratios (1 wt% IW = 1.80) than LG hydrogels with similar concentrations (1 wt% LG = 0.61). Hydrogel beads were impregnated with ammonium nitrate and potassium chloride to produce potential SRFs. The release rates of K+ and NO3− nutrients from the produced SRFs into deionised water were decreased by one order of magnitude compared to pure salts. The nutrient release rates of the IW-based SRFs were shown to be similar to SRFs produced from LG alginate. Hydrogel beads were impregnated with limestone, and it was determined that the alginate-based hydrogels could significantly decrease the nutrient release rate. Using industrial kelp solid waste extracted alginate slurries shows potential for soil amendments production. This report emphasises, for the first time, the use of a crude alginate product in soil amendment formation. Further, it demonstrates slower release rates and soil pH control.

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Entrapment of nano-ZnO into alginate/polyvinyl alcohol beads with different crosslinking ions for fertilizer applications

Cited by 22 publications

References 42 publications

Biocompatible Alginate Film Crosslinked with Ca²⁺ and Zn²⁺ Possesses Antibacterial, Antiviral, and Anticancer Activities

Biocompatible Alginate Film Crosslinked with Ca²⁺ and Zn²⁺ Possesses Antibacterial, Antiviral, and Anticancer Activities

Synthesis and phosphate adsorption performance of elephant dung biochar modified with magnesium and iron

Macroalgal-Derived Alginate Soil Amendments for Water Retention, Nutrient Release Rate Reduction, and Soil pH Control

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Entrapment of nano-ZnO into alginate/polyvinyl alcohol beads with different crosslinking ions for fertilizer applications

Cited by 22 publications

References 42 publications

Biocompatible Alginate Film Crosslinked with Ca2+ and Zn2+ Possesses Antibacterial, Antiviral, and Anticancer Activities

Biocompatible Alginate Film Crosslinked with Ca2+ and Zn2+ Possesses Antibacterial, Antiviral, and Anticancer Activities

Synthesis and phosphate adsorption performance of elephant dung biochar modified with magnesium and iron

Macroalgal-Derived Alginate Soil Amendments for Water Retention, Nutrient Release Rate Reduction, and Soil pH Control

Contact Info

Product

Resources

About

Biocompatible Alginate Film Crosslinked with Ca²⁺ and Zn²⁺ Possesses Antibacterial, Antiviral, and Anticancer Activities

Biocompatible Alginate Film Crosslinked with Ca²⁺ and Zn²⁺ Possesses Antibacterial, Antiviral, and Anticancer Activities