Soy protein isolate/poly(lactic acid) injection-molded biodegradable blends for slow release of fertilizers

Calábria, Luciane; Vieceli, Nathália; Bianchi, Otávio; Oliveira, Ricardo Vinícius Bof de; Filho, Irajá do Nascimento; Schmidt, Vanessa

doi:10.1016/j.indcrop.2011.08.003

Cited by 55 publications

(23 citation statements)

References 26 publications

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“…Besides that, their production usually consumes CO 2 . Several examples can be cited, such as chitin, poly(lactic acid), cellulose acetate, starch, and more incipiently poly(butylene succinate) (PBS) . This polymer is obtained by the polycondensation of 1,4‐butanediol and succinic acid .…”

Section: Introductionmentioning

confidence: 99%

Controlled‐release fertilizer based on poly(butylene succinate)/urea/clay and its effect on lettuce growth

Baldanza

Souza

Filho

et al. 2018

J of Applied Polymer Sci

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Controlled‐release fertilizer is one of the most critical tools in agribusiness for decreasing environmental impacts. Thus, the development of bio‐based systems able to induce the slow release of fertilizers has become the focus of numerous researchers. In this sense, this work presents a slow‐release fertilizer prepared by melt mixing of poly(butylene succinate) filled with 30 wt % urea and 5 wt % montmorillonite clay. The obtained materials were characterized using FTIR, XRD, and SAXS. Also, the release of urea was investigated using gravimetric and spectrophotometric tests. Finally, a vegetable growth analysis was performed to evaluate the development of lettuce (Lactuca sativa L.). The best composite material can increase the diameter of the lettuce by 67%, whereas the conventional use of urea increased this diameter by 48%. Therefore, the presented materials are useful as fertilizer systems.

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Section: Introductionmentioning

confidence: 99%

Controlled‐release fertilizer based on poly(butylene succinate)/urea/clay and its effect on lettuce growth

Baldanza

Souza

Filho

et al. 2018

J of Applied Polymer Sci

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“…The energy savings realized by using the soy-based N source is substantial. Instead of using fossil fuels and/or electricity to fix atmospheric N (N 2 ) to make ammonia (the Haber-Bosch process), the N 2 fixation for biopolymer fertilizer is performed in the root nodules of soybean plants through a symbiotic relationship with Rhizobia bacteria, and the energy for this natural process is provided by the sun through photosynthesis (Calabria et al, 2012;McCabe et al, 2016b;Sawyer et al, 2010;Schrader et al, 2013).…”

Section: Unitsmentioning

confidence: 99%

Effectiveness of Biopolymer Horticultural Products for Production and Postproduction Nutrient Provision of Garden and Bedding Crops and Container Ornamentals

Schrader¹,

Currey²,

Flax³

et al. 2018

hortte

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We evaluated emerging biopolymer horticultural products that provide fertilizer nutrients to plants (fertilizing biocontainers, pelletized biopolymer fertilizer, and biopolymer fertilizer spikes) for their effectiveness during greenhouse production and garden growth of floriculture crops, and during postproduction culture of container ornamentals. Greenhouse experiments (in 4.5-inch containers) and garden trials were performed with tomato (Solanum lycopersicum), pepper (Capsicum annuum), petunia (Petunia ×hybrida), and marigold (Tagetes patula). Postproduction experiments were performed with 12-inch hanging baskets containing lobelia (Lobelia erinus), trailing petunia (Calibrachoa ×hybrida), and petunia, and with 13-inch patio planters containing zonal geranium (Pelargonium ×hortorum), spikes (Cordyline indivisa), bidens (Bidens ferulifolia), and trailing petunia. Although slightly less effective than synthetic controlled-release fertilizer (CRF), all three nutrient-containing biopolymer horticultural products were sufficient and suitable for providing fertilizer nutrients to plants grown in containers and in garden soil. Results of the postproduction experiment provided proof-of-concept for the effectiveness and potential of biopolymer fertilizer spikes as a sustainable method for providing fertilizer nutrients to containerized plants. The current formulation of pelletized biopolymer fertilizer was somewhat more effective for vegetable crops (pepper and tomato) than for floriculture crops (marigold and petunia). For plants produced in 4.5-inch containers, the combination of the fertilizing biocontainer with no additional fertilizer in the greenhouse, then burying the fertilizing container beneath the plant to degrade and provide nutrients in the garden was very effective. Biopolymer horticultural products represent a promising alternative to petroleum-based plastic containers and synthetic fertilizers. Adoption of some or all of these technologies could improve the environmental sustainability of the horticulture industry without reducing productivity or efficiency, and without increasing labor intensity.

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“…Some of polymeric materials are non-biodegradable, toxic to the plants, and change the soil's pH, which is undesirable (Azeem et al 2014). Recently, the development of bio-composite-based coating materials obtained from renewable sources has been investigated to obviate the disadvantages of non-biodegradability of certain polymer coatings and to offset higher operational costs (Calabria et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Utilization of waste lignin to prepare controlled-slow release urea

Behin

Sadeghi

2016

Int J Recycl Org Waste Agricult

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Purpose The present work reports an economically attractive improvement in the area of producing particulate slow release nitrogen fertilizer using lignin as a waste effluent of pulp and paper manufacturing process. Methods An improved coating of modified lignin was applied on the surfaces of the individual urea particles. The Kraft and Sulfite black liquors obtained from two different paper pulping units and were used as sources of sulfate and sulfite lignin, respectively. Chemical modification of extracted lignin was performed through acetylation reaction by acetic acid/sodium metabisulfite to increase its hydrophobicity character. In a separate experiment, a thin layer of synthesized acetylated lignin was coated on granular urea by fluidized-bed technique. The nitrogen release of synthesized fertilizer in the water and soil was examined by the Kjeldahl method. Results The analysis of FTIR spectra indicated the changes in the functional groups of acetylated lignin. Petrographic photography and scanning electron microscopy (SEM) analyses demonstrated a uniform and homogeneous covering of the urea surface. The 7 day nitrogen release rate of urea coated by acetylated lignin in soil was obtained 36.3 and 45.3 % for Kraft and Sulfite lignin, respectively, whereas this value was 59 % for sulfur coated urea. Conclusions Using industrial wastewater as source of lignin gives satisfactory results for industrial applications and yields a quality green fertilizer product with reduced operation difficulties while considerably preserving the environment.Keywords Controlled release fertilizer Á Fluidized-bed coating Á Kraft and sulfite liquor Á Modified lignin coated urea Abbreviations CRF Controlled-release fertilizers FTIR Fourier transform infrared SCU Sulfur coated urea SEM Scanning electron microscopy

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Soy protein isolate/poly(lactic acid) injection-molded biodegradable blends for slow release of fertilizers

Cited by 55 publications

References 26 publications

Controlled‐release fertilizer based on poly(butylene succinate)/urea/clay and its effect on lettuce growth

Controlled‐release fertilizer based on poly(butylene succinate)/urea/clay and its effect on lettuce growth

Effectiveness of Biopolymer Horticultural Products for Production and Postproduction Nutrient Provision of Garden and Bedding Crops and Container Ornamentals

Utilization of waste lignin to prepare controlled-slow release urea

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