Extraction, characterization and optimization of high quality bio-oil derived from waste date seeds
TL;DR: Extraction of high quality bio-oil from waste date seeds would convert these waste seeds to valuable product as well as avoid the hazardous effects associated with date seeds landfilling.
Abstract: Extraction of high quality bio-oil from waste date seeds would convert these waste seeds to valuable product as well as avoid the hazardous effects associated with date seeds landfilling. The prese...
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TL;DR: DP-ZnO-NPs demonstrated significant antibacterial effects on various pathogenic bacteria in terms of zone-of-inhibition measured by disc-diffusion method, and is suitable for industrial wastewater treatment.
229 citations
TL;DR: A low-cost, effectual and sustainable biosorbent for effective treatment of Cr(VI) ions polluted water streams has been reported.
57 citations
25 Feb 2020
TL;DR: Results showed that although all date fruit varieties were nutritious, they contain significant variation in their nutritional, physical, elemental, and phytochemical properties.
Abstract: Production of highly soluble date sugar powder from the nutritive date fruits will be a suitable and superior alternative to commercial refined sugar, providing sustainability in date palm cultivation. A good understanding of the nutritional and phytochemical composition of date fruits is imperative for this purpose. In this work, 11 different date fruit species commonly cultivated in the United Arab Emirates were studied for their chemical composition, physical properties, amino acids, minerals, and anti-nutritional contents. The results revealed that the date fruits contain moisture, protein, lipid, and ash content in the ranges of 14.8%–20.5%, 2.19%–3.12%, 0.25%–0.51%, and 1.37%–1.97%, respectively. Potassium was identified as the major microelement in all the date varieties. Amino acid assay depicted that the date fruits mainly contained glutamine and aspartic acids, along with other essential acids. Monosaccharides (glucose and fructose) were more prevalent in the date fruits than polysaccharides (sucrose), exhibiting the potential of date fruit for non-diabetic sugar production. Phytoconstituents present in date samples, such as flavonoids, oxalates, tannins, saponins, alkaloids, and cyanides, were also evaluated and reported. Results showed that although all date fruit varieties were nutritious, they contain significant variation in their nutritional, physical, elemental, and phytochemical properties.
35 citations
TL;DR: In this paper, a detailed assessment on the yield and quality of bio-oil produced from the fast pyrolysis process of date seeds and date syrup industrial waste is presented.
Abstract: This paper presents a detailed assessment on the yield and quality of bio-oil produced from the fast pyrolysis process of date seeds and date syrup industrial waste. Pyrolysis experiments were conducted at a temperature of 500 °C for 30 min using a laboratory-scale semi-batch reactor equipped with an inline condensing system to separate the oil fraction from the non-condensable pyrolysis gases. The physical and chemical properties of the condensed bio-oil from date seeds and syrup waste feedstocks are analyzed and compared. Results showed that the pyrolytic oil obtained from date seeds possessed relatively higher kinematic viscosity (1.42 × 10−3 kg/m s) and high heating value (29.06 × 106 J/kg) than syrup waste bio-oil (1.31 × 10−3 kg/m s and 19.29 × 106 J/kg). Gas chromatography mass–spectroscopy (GC–MS) analysis of bio-oil obtained from date seeds and syrup waste primarily contained 2-furanmethanol (21.03%) and 2-fluoroformyl-3,3,4,4-tetrafluoro-1,2-oxazetidine (31.04%) with other valuable components, respectively. The pyrolytic oil of date seeds and syrup waste could be further refined and employed as building blocks for several value-added products in biofuel production and pharmaceutical/flavoring agents. Thus, the present study provides new functionality for the date palm industry to convert the waste products into valuable commodities.
22 citations
TL;DR: In this paper, the authors used zinc oxide nanoparticles (ZnO NPs) for antifungal treatment against Alternaria alternata which caused early blight disease in Solanum lycopersicum.
Abstract: In this study, zinc oxide nanoparticles (ZnO NPs) were synthesized using leaf extract of Cinnamomum camphora (L.) Presl and zinc acetate. Its antifungal activity was evaluated against Alternaria alternata which caused early blight disease in Solanum lycopersicum. The results showed that the size of the synthesized ZnO NPs obviously depended on the pH during the reaction. The peak of the UV-Vis spectra was at 368-374 nm, which confirmed the synthesis of ZnO NPs. SEM showed that the synthesized ZnO NPs agglomerated into spherical particles. TEM reveled that the average particle sizes of ZnO NPs synthesized at pH 7, pH 8 and pH 9 were about 13.92, 15.19 and 21.13 nm, respectively. Furthermore, ZnO NPs treatments at 20-160 mg/L could significantly inhibit the mycelia growth of A. alternata, and ZnO NPs synthesized at pH 7 showed the best antifungal effect with MIC value recorded as 20 mg/L. Moreover, 20 mg/L ZnO NPs synthesized at pH 7 significantly limited spore germination and germ tube elongation of A. alternata. In addition, ZnO NPs induced excessive accumulation of MDA in A. alternata and caused the damage of cell membrane, leading to the leakage of protein and nucleic acid. Therefore, green synthesized ZnO NPs, as a promising biocontrol agent, could be used to control fungal diseases.
20 citations
References
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TL;DR: In this paper, a review summarizes the current state of knowledge regarding the effect of feedstock and pretreatments on the yield, product distribution, and upgradability of bio-oil.
494 citations
"Extraction, characterization and op..." refers methods in this paper
...Pretreatment of the biomass using a suitable physical/chemical medium is a most common practice adopted for improved oil yield from the biomass (Carpenter et al., 2014)....
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TL;DR: In this paper, Fourier transform infrared (FTIR) spectroscopy has been used for analysis of extra virgin olive oil (EVOO) adulterated with palm oil (PO), and two multivariate calibrations, namely partial least square (PLS) and principle component regression (PCR), were optimized for constructing the calibration models, either for normal spectra or its first and second derivatives.
383 citations
"Extraction, characterization and op..." refers result in this paper
...As observed in the figure, the characteristic peaks in date seed oil (Figure 6(A)) matched very well with those observed in olive oil (Figure 6(B)) (Rohman and Man, 2010)....
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TL;DR: Various aspects of three commonly used pretreatment methods, viz., steam explosion, acid and alkaline, applied on various lignocellulosic biomasses to augment their digestibility alongwith the challenges associated with their processing are discussed.
375 citations
"Extraction, characterization and op..." refers background in this paper
...The low yield associated with the salt and alkali pretreatment methods can be explained by the side reactions triggered by the sodium salts leading to rancidification and saponification of oil (Singh et al., 2015)....
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TL;DR: In this article, the seeds of two date palm (Phoenix dactylifera L.) cultivars, Deglet Nour and Allig, from the Degach region of Tunisia, were analyzed for their main chemical composition.
354 citations
"Extraction, characterization and op..." refers background in this paper
...Aside the sweet pulpy fruit, dates are also known for their seeds which account for about 10–18% of the fruit weight (Besbes et al., 2004)....
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TL;DR: In this article, properties of seeds and oil extracted from fully ripened Phoenix canariensis date seeds were studied. And the physicochemical properties of the oil observed include: the saponification number 191.28; the iodine number 76.67; the peroxide value 3.62meq/kg; the unsaponifiable matter content 1.59%; the carotenoid content 5.51; and the refractive index 1.45.
220 citations
"Extraction, characterization and op..." refers methods in this paper
...Subsequently, the obtained bio-oil was cooled and flushed with a nitrogen stream to remove any trace solvent that was present in the oil (Nehdi et al., 2010)....
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