Hydrogel/clinoptilolite nanocomposite-coated fertilizer: swelling, water-retention and slow-release fertilizer properties

Rashidzadeh, Azam; Olad, Ali; Reyhanitabar, Adel

doi:10.1007/s00289-015-1428-y

Cited by 57 publications

(31 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…As a comparison, a fertilizer with polyvinyl chloride coating has retention water of 26% after 20 days with 2% for the land used (Jamnongkan & Kaewpirom, 2010). This is different from the water retention test after 30 days for soil with hydrogel/clinoptilolite/NPK fertilizer with a yield of 69% while the soil without fertilizer was 53% (Rashidzadeh et al, 2015).…”

Section: Water Retention Testcontrasting

confidence: 68%

Phosphate Release from Slow Release fertilizer using a mixture of Chitosan and Potato Flour as a coating

Rengga

Mubarok

Cahyarini

2019

JBAT

View full text Add to dashboard Cite

Indonesia has a high fertilizer demand because its use is easily dissolved during watering, so the fertilization process is inefficient. On the other hand, crab shells accumulate every year because the waste is almost 50% of the initial weight. One way to overcome this problem is to make a modified fertilizer into a slow release fertilizer by adding a bio-gel layer from chitosan and potato flour. The hydrophobic properties of chitosan and potato powder were chosen in addition to the amylopectin content of potato flour more than other types of starch. Then chitosan was dissolved using acetic acid, while potato starch was dissolved by distilled water by heating 76 o C. Both mixtures are added to the fertilizer then stirred until the compost is coated. Scanning electron microscopy (SEM) and Fourier transform infrared spectroscopy (FTIR) were used to characterize the morphology and composition of the products. Addition of thickness to the outer layer of manure reached 35.56 µm. The O-H function group is found in the spectrum of potassium and phosphorus which shows that there is a hydrogen bond in chitosan and potato flour. The most substantial swelling is obtained at the K (chitosan): P (potato flour) ratio of 3:7. The wet retention test showed that the addition of chitosan and potato flour was able to withstand soil retention. In the release test for Phosphorus shows good results at a value of 0.923 mg/L.

show abstract

Section: Water Retention Testcontrasting

confidence: 68%

Phosphate Release from Slow Release fertilizer using a mixture of Chitosan and Potato Flour as a coating

Rengga

Mubarok

Cahyarini

2019

JBAT

View full text Add to dashboard Cite

show abstract

“…attributes to an initial swelling rate ( 0 of the hydrogel; k s (g.g -1 .min -1 ) is the constant rate of swelling; (g.g -1 ) is the theoretical equilibrium water absorption capacity (Rashidzadeh, Olad & Reyhanitabar, 2015). The plot of versus ( Fig.…”

Section: Swelling Kinetic Studiesmentioning

confidence: 99%

Superabsorbent hydrogel made of NaAlg-g-poly(AA-co-AAm) and rice husk ash: Synthesis, characterization, and swelling kinetic studies

Gharekhani

Olad

Mirmohseni

et al. 2017

Carbohydrate Polymers

Self Cite

194

View full text Add to dashboard Cite

The sodium alginate-g-poly(acrylic acid-co-acrylamide)/rice husk ash (NaAlg-g-P(AA-co-AAm)/RHA) superabsorbent nanocomposite was synthesized by the free-radical graft copolymerization of alginate (NaAlg), acrylic acid (AA), acrylamide (AAm), and RHA in aqueous solution. FTIR spectra revealed that the monomers were grafted onto NaAlg chains, and the nanocomposite was formed successfully. Incorporation of RHA into hydrogel matrix formed porous interlinked channels within hydrogel network. Superabsorbent nanocomposite showed greater equilibrium swelling capacity (1070g/g) compared with neat hydrogel (830g/g). Moreover, water transport mechanism of all hydrogels was non-Fickian diffusion type. Rheological measurements confirmed effective role of RHA in improving gel strength of superabsorbent nanocomposite. The influence of various factors, such as different loads (0.3, 0.6, 0.9 psi), solution pH, saline solution, and temperature on the swelling behavior of hydrogels was also assessed. Superabsorbent nanocomposite exhibited good pH-dependent swelling reversibility and high water retention capability, making it more efficient water-saving material for agricultural and horticultural applications.

show abstract

“…In brown algae, alginates are the most abundant polysaccharides reaching up to 40% of the dry weight [6]. Amongst the recent applications of alginates, we can highlight their use as a matrix to encapsulate and release fertilizer and also for the synthesis of superabsorbent [7][8][9]. Alginates are typically described by their M/G ratio and average molecular weight, since these parameters are closely related to the functionality of the alginates as the encapsulation material [10].…”

Section: Introductionmentioning

confidence: 99%

Characterization and properties of sodium alginate from brown algae used as an ecofriendly superabsorbent

Helmiyati

Aprilliza

2017

IOP Conf. Ser.: Mater. Sci. Eng.

115

View full text Add to dashboard Cite

Abstract. Sodium alginate obtained from the extraction of brown algae is used as the backbone for the synthesis of superabsorbent nanocomposite copolymerization. The first stage of extraction is the demineralization process using 0.1 M HCl solution and then 2% Na2CO3 solution for 2 hours at 60°C. The rendement of sodium alginate obtained was 44.32% with molecular weight of 40680 g/mol with measurement of the intrinsic viscosity. FTIR spectra of sodium alginate showed mannuronic acid functional group at wavenumber 884 cm -1 and the uronic acid at wavenumber 939 cm -1 , OH functional group at wavenumber 3200-3400 cm -1 , and CH2 stretching at wavenumber 2928 cm -1 . The diffraction pattern of isolated sodium alginate has specific 2θ at 13.068 and 21.096, amorphous intensity found specific 2θ at 18.058, and the obtained crystallinity degree of the sodium alginate is equal to 29.292% from the XRD analysis. The morphological analysis by SEM shows fibrils of isolated sodium alginate. The success isolation of sodium alginate from brown algae is supported by DSC which shows the decomposition temperature of pure sodium alginate and isolated alginate have close values, namely 251.12°C for pure sodium alginate and 229.90°C for isolated sodium alginate.

show abstract

Hydrogel/clinoptilolite nanocomposite-coated fertilizer: swelling, water-retention and slow-release fertilizer properties

Cited by 57 publications

References 33 publications

Phosphate Release from Slow Release fertilizer using a mixture of Chitosan and Potato Flour as a coating

Phosphate Release from Slow Release fertilizer using a mixture of Chitosan and Potato Flour as a coating

Superabsorbent hydrogel made of NaAlg-g-poly(AA-co-AAm) and rice husk ash: Synthesis, characterization, and swelling kinetic studies

Characterization and properties of sodium alginate from brown algae used as an ecofriendly superabsorbent

Contact Info

Product

Resources

About