Insight on açaí seed biomass economy and waste cooking oil: Eco-sorbent castor oil-based

Martins, Larissa de Souza; Silva, Nycolle G. S.; Claro, Amanda Maria; Amaral, Nayara Cavichiolli do; Barud, Hernane S.; Mulinari, Daniella Regina

doi:10.1016/j.jenvman.2021.112803

Cited by 18 publications

(5 citation statements)

References 54 publications

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“…Nitrogen nutrients in aquaponic water are mainly available in organic form, and therefore are not detected by an electric conductivity meter. In the first 3 days, total ammonia was higher than recommended for recirculating aquaculture system, 3 mg L −1 [22], but the non-ionized ammonia (0.045 mg L −1 ) was lower than the mean lethal concentration [23] determined for tambaqui hybrid species (Colossoma macropomum x Piaractus mesopotamicus) and for juveniles of Colossoma macropomum with LC 50-96 h of 7.76 mg L −1 of NH 3 [24]. Therefore, the ammonia and nitrate absorbed by the roots [25] were detected in the water tank at a relative low level that would not affect fish health [22,23], but were sufficient for plants nutritional requirements [20,26].…”

Section: Water and Air Qualitymentioning

confidence: 80%

Residue from Açai Palm, Euterpe oleracea, as Substrate for Cilantro, Coriandrum sativum, Seedling Production in an Aquaponic System with Tambaqui, Colossoma macropomum

et al. 2022

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The production of high-quality seedlings is important to achieve better productivity in horticulture. Despite being well developed in conventional agriculture, there are few studies on aquaponic systems. The substrate choice in this integrated culture affects plant and economic feasibility. This study verified the effects of using Euterpe oleracea residue as a substrate for Coriandrum sativum seedling production in an aquaponic system with tambaqui, Colossoma macropomum. Five mixtures of Euterpe oleracea offal (0%, 25%, 50%, 75% and 100%) with coconut fiber, nourished by aquaponic wastewater, were evaluated. Water quality, fish and plant performance were analyzed during an 18-day experiment. Although total ammonia decreased from 5.17 mg L−1 to 0.64 mg L−1, nitrite and nitrate did not exceed 1 mg L−1 and 3 mg L−1, respectively. C. macropomum mean weight gain was 118.79 g and achieved high food assimilation, with a 0.86 feed conversion rate. Mean blood hematocrit (30.20 ± 5.99%) and glucose (59.5 ± 10.06 mg dL−1) indicates good physiological status of the C. macropomum. The use of the Euterpe oleracea offal mixture at 50% decreased by half the total fresh mass of Coriandrum sativum, down to 1.12 ± 0.30 g, but did not decrease dry mass (p > 0.05). When the mixture was above 25%, plant and leaf length were 8 cm and 3 cm smaller, respectively, and the number of leaves and stem base diameter were reduced by 34% and 40%, respectively. We do not recommend using more than 25% of Euterpe oleracea offal with coconut fiber for Coriandrum sativum seedling production in an aquaponic system.

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Section: Water and Air Qualitymentioning

confidence: 80%

Residue from Açai Palm, Euterpe oleracea, as Substrate for Cilantro, Coriandrum sativum, Seedling Production in an Aquaponic System with Tambaqui, Colossoma macropomum

et al. 2022

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“…The band absorption at 2933 cm -1 is associated with C-H stretching of methyl and methylene groups of cellulose. The 1730 cm -1 band is associated with C=O carboxyl groups from hemicellulose and lignin and the 1640 cm -1 band is associated with C=O stretching of aromatic skeletal of lignin 9,37 . The spectrum of vulcanized NR without acai powder (0 phr) showed three peaks at wavelength intervals of 2852-2960 cm −1 , suggesting functional group vibrations of the NR structure.…”

Section: Infrared Spectroscopic Analysis With Fourier Transformed In ...mentioning

confidence: 99%

Acai Residue as an Ecologic Filler to Reinforcement of Natural Rubber Biocomposites

et al. 2023

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The biodiversity of plant resources is a renewable source that can use as a sustainable component in various applications. The use of vegetable waste as a filler element in polymeric composites is part of the solid waste management policy and the sustainable development of agribusiness. In this work, the natural rubber composites were prepared with acai seed in proportions of 0, 10, 20, 30, 40, and 50 phr (per hundred rubber). The composites were homogenized in an open cylinder mixer and characterized by rheometric, morphological, mechanical, and thermal tests. The addition of the organic fillers significantly reduced the vulcanization process time. Thermogravimetric analysis and infrared spectroscopy showed that the composites were thermally stable and showed no structure changes after the vulcanization process, respectively. The Lorenz-Parks method's evaluation of matrix/filler interactions showed a strong interaction between NR/Acai. The new biocomposite can replace nonecological composites economically and sustainably.

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“…A study by Alves [ 50 ] et al reported a method for preparing castor oil-based PU foams with different polyol: isocyanate concentrations for diesel oil sorption. The use of açaí seeds [ 52 ] as an ecosorbent filler in castor oil-based PU and its applications in oil/water separators in grease traps in households and restaurants was demonstrated.…”

Section: Introductionmentioning

confidence: 99%

Biobased Castor Oil-Based Polyurethane Foams Grafted with Octadecylsilane-Modified Diatomite for Use as Eco-Friendly and Low-Cost Sorbents for Crude Oil Clean-Up Applications

et al. 2022

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Herein we report the synthesis and characterization of novel castor oil-based polyurethane (PU) foam functionalized with octadecyltrichlorosilane (C18)-modified diatomaceous earth (DE) particles, exhibiting superior hydrophobicity and oil adsorption, and poor water absorption, for use in effective clean-up of crude oil spillage in water bodies. High-performance and low-cost sorbents have a tremendous attraction in oil spill clean-up applications. Recent studies have focused on the use of castor oil as a significant polyol that can be used as a biodegradable and eco-friendly raw material for the synthesis of PU. However, biobased in-house synthesis of foam modified with C18-DE particles has not yet been reported. This study involves the synthesis of PU using castor oil, further modification of castor oil-based PU using C18 silane, characterization studies and elucidation of oil adsorption capacity. The FTIR analysis confirmed the fusion of C18 silane particles inside the PU skeleton by adding the new functional group, and the XRD study signified the inclusion of crystalline peaks in amorphous pristine PU foam owing to the silane cross-link structure. Thermogravimetric analysis indicated improvement in thermal stability and high residual content after chemical modification with alkyl chain moieties. The SEM and EDX analyses showed the surface’s roughness and the incorporation of inorganic and organic elements into pristine PU foam. The contact angle analysis showed increased hydrophobicity of the modified PU foams treated with C18-DE particles. The oil absorption studies showed that the C18-DE-modified PU foam, in comparison with the unmodified one, exhibited a 2.91-fold increase in the oil adsorption capacity and a 3.44-fold decrease in the water absorbing nature. From these studies, it is understood that this novel foam can be considered as a potential candidate for cleaning up oil spillage on water bodies.

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Insight on açaí seed biomass economy and waste cooking oil: Eco-sorbent castor oil-based

Cited by 18 publications

References 54 publications

Residue from Açai Palm, Euterpe oleracea, as Substrate for Cilantro, Coriandrum sativum, Seedling Production in an Aquaponic System with Tambaqui, Colossoma macropomum

Residue from Açai Palm, Euterpe oleracea, as Substrate for Cilantro, Coriandrum sativum, Seedling Production in an Aquaponic System with Tambaqui, Colossoma macropomum

Acai Residue as an Ecologic Filler to Reinforcement of Natural Rubber Biocomposites

Biobased Castor Oil-Based Polyurethane Foams Grafted with Octadecylsilane-Modified Diatomite for Use as Eco-Friendly and Low-Cost Sorbents for Crude Oil Clean-Up Applications

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