Evaluation of the interactions between chitosan and humics in media for the controlled release of nitrogen fertilizer

Araújo, Bruno Rafael; Romão, Luciane Pimenta Cruz; Doumer, Marta Eliane; Mangrich, Antônio S.

doi:10.1016/j.jenvman.2016.12.059

Cited by 79 publications

(59 citation statements)

References 26 publications

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“…Chitosan nanoparticles (CNs) without any incorporation of NPK fertilizers have been tested as a foliar spray on coffee plants to evaluate its efficacy on the promotion of growth and physiology of the plants under greenhouse conditions (Van, Minh, & Anh, 2013). Recently, Araújo, Romão, Doumer, and Mangrich (2017) have utilized chitosan along with peat, humic acid, and humin as a carrier for evaluating the controlled release of urea and study its N release pattern in a laboratory experiment. Because of these properties, chitosan was advocated as a matrix for synthesizing nSRFs in this study.…”

Section: Introductionmentioning

confidence: 99%

Characterization of a chitosan‐based sustained release nanofertilizer formulation used as a soil conditioner while simultaneously improving biomass production of Zea mays L.

et al. 2020

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Slow release nanofertilizers are of interest for reducing soil nutrient losses and preventing land degradation associated with established fertilizer use due to use of fertilizers. Chitosan nanoparticles (CN) were prepared following polymerization of chitosan with methacrylic acid and later incorporated with potassium (CNK). CN as well as CNK were characterized using Fourier-transform infrared spectroscopy (FTIR), transmission electron microscopy, field-emission scanning electron microscope, and atomic force microscopy (AFM) techniques. The slow potassium release property of CNK was elucidated employing membrane diffusion studies. Zea mays plant were tested in pot trials using different doses of K-formulation with potassium incorporated or otherwise and compared with suitable controls. Soils amended with reduced potassium rates (75% CNK) significantly increased the fresh-and drybiomass accumulation by 51 and 47%, respectively, in relation to positive control (100% KCl). The use of 75% CNK improved physical properties of soil by way of enhanced porosity, higher water conductivity, and enhanced friability that favoured root growth. These along with reduced dry density induced the plants to uptake higher quantities of nutrients and develop double the root biomass relative to control. Further, no deleterious effect of the nanoformulation was apparent and the treatments showed better carbon-cycling activity. Increased fluorescein diacetate (FDA) hydrolysis in these treatments demonstrated higher soil microbial activity in relation to control. CNK was hypothesized to condition the soil by cohesive bonding of soil particles, stabilizing the soil aggregates by coating them, and preventing their degradation amidst disruptive forces such as repeated watering. Sustained nutrient release synchronize with crop demands, reduced fertilizer requirement and increased productivity.

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Section: Introductionmentioning

confidence: 99%

Characterization of a chitosan‐based sustained release nanofertilizer formulation used as a soil conditioner while simultaneously improving biomass production of Zea mays L.

et al. 2020

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“…A band at 1577 cm −1 was attributed to the stretching vibration of C=C bonds in the aromatic rings formed after carbonization. 35 Bands in the region 1260-1000 cm −1 were assigned to asymmetric stretching of C−O−C bridges or stretching of aromatic C−O. 36,37 Peaks at 785, 660, and 450 cm −1 in the spectra for the composites corresponded to Ti−O−Ti bonds, Ti−O bending, and Ti−O stretching.…”

Section: Characterization Of the Materialsmentioning

confidence: 99%

Synthesis, Characterization, and Synergic Photocatalytic Activity of Amorphous TiO2/Chitosan Carbon Microspheres

Prola

Bach-Toledo

Schultz

et al. 2020

J. Braz. Chem. Soc.

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In this work, we report the synthesis and characterization of new amorphous graphene-like TiO 2 / chitosan carbon microspheres and its performance as photocatalyst. Four different carbon chitosan microspheres materials were obtained based on the distinctive procedure to incorporate TiO 2 and TiOSO 4 to chitosan structure by pyrolysis at 600 °C. Detailed characterizations were carried out using many different techniques, as thermogravimetric analysis/differential scanning calorimetry (TGA/DSC), scanning electron miscroscopy/energy dispersive X-ray spectroscopy (SEM/EDS), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), N 2 adsorption-desorption, and the obtained materials show an amorphous and a graphene-like structure, which improve the photocatalytic activity. The synthesized materials promoted a fast degradation of three micropollutants under UV-A radiation and, in all cases the degradation rate was approximately 98% at 30 min of reaction, being superior to the P-25 TiO 2 efficiency. Due to the amorphous graphene-like structure, all the materials present low adsorption capacity, the high photocatalytic efficiency can be attributed to the material structure that promotes the effective charge separation which reduces the recombination electron/hole, enhancing the photocatalytic efficiency.

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“…Each year, the loss caused by drought alone accounts for 15% of the total loss caused by different natural disasters in China. In view of the above problems, intensively developing water saving and drought resistant technologies, and preparing slow‐release fertilizers with high selectivity and high efficiency have become one of the research priorities of scientists . Compared to traditional fertilizers, slow‐release fertilizers have many advantages, such as controlled nutrient release, long application period, high utilization, and reduced nutrient loss .…”

Section: Introductionmentioning

confidence: 99%

Preparation and properties of novel corn straw cellulose–based superabsorbent with water‐retaining and slow‐release functions

Wang

Sung-Bum

Zhang

et al. 2020

J of Applied Polymer Sci

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In this study, novel semiinterpenetrating polymer networks (semi-IPNs) superabsorbent resins with slow-release fertilizer (CSC-g-AA/APP, CSC-g-AA/PVA-APP), based on corn straw cellulose polymer and linear polyvinyl alcohol (PVA), were prepared by solution polymerization. The nitric acid-aqueous solution method was adopted to extract cellulose from corn straw. Ammonium polyphosphate (APP) was introduced to supply nitrogen and phosphorus nutrients. The prepared materials were characterized by scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), and thermogravimetric analysis (TGA). Moreover, the water absorbency and the slow-release performance of CSC-g-AA/APP and CSC-g-AA/ PVA-APP were studied. The results indicated that the two superabsorbent resins exhibited excellent water absorbency of 262.8 and 303.2 g/g in distilled water, enhanced the water-holding capacity of soil, and also released nutrients slowly. The cumulative N and P release rates of CSC-g-AA/PVA-APP were 64.47 and 53.53% after 25 days in soil, which were lower than those of CSC-g-AA/APP. The addition of these products into soil significantly reduced the leaching losses of nutrients. Therefore, it can be concluded that the superabsorbent resins with water-retaining and slow-release properties, low production costs, and environment-friendly characteristics, have great potential for applications in agricultural production.

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Evaluation of the interactions between chitosan and humics in media for the controlled release of nitrogen fertilizer

Cited by 79 publications

References 26 publications

Characterization of a chitosan‐based sustained release nanofertilizer formulation used as a soil conditioner while simultaneously improving biomass production of Zea mays L.

Characterization of a chitosan‐based sustained release nanofertilizer formulation used as a soil conditioner while simultaneously improving biomass production of Zea mays L.

Synthesis, Characterization, and Synergic Photocatalytic Activity of Amorphous TiO2/Chitosan Carbon Microspheres

Preparation and properties of novel corn straw cellulose–based superabsorbent with water‐retaining and slow‐release functions

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