Agroindustrial Waste for Lead and Chromium Biosorption

Bioremediation is a pollutant removal method that has had a great boom due to the diversity of agroindustrial waste that can be used for this purpose, and that has shown having great efficiency and profitability in the adsorption of heavy metals, such as Pb, Cu, and Co. Based on the above, the present work carried out kinetic and equilibrium studies of bioadsorption of Cr (III) using orange peel (OP) as adsorbent, previously treated with methanol, water, and a water–methanol mixture at different pH (0.91, 1.78 and 2.72), and at 30 °C, finding that the adsorption capacity at equilibrium increases with increasing pH, having a maximum of 55 mg g−1 at pH 2.72—under these conditions, lower adsorption energy was used to remove Cr (III). In addition, it was determined that there are no external mass transfer limitations. An isoelectric point analysis indicated that the adsorption is not carried out by electrostatic forces and a FTIR study of the functional groups of OP showed a decrease in the main functional groups (pectin, cellulose, and lignin, among others), which is directly related to the adsorption capacity of the bioadsorbent.

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Morphological and physicochemical aspects of microbial lipase obtained from novel agroindustrial waste encapsulated in a sol–gel matrix

Journal of Thermal Analysis and Calorimetry ◽

10.1007/s10973-015-4494-3 ◽

2015 ◽

Vol 120 (3) ◽

pp. 1503-1509 ◽

Cited By ~ 4

Author(s):

Claudia Zubiolo ◽

Rafaela Cristiane Andrade Santos ◽

Renan Tavares Figueiredo ◽

Cleide Mara Faria Soares ◽

Luciana Cristina Lins de Aquino Santana

Keyword(s):

Sol Gel ◽

Microbial Lipase ◽

Agroindustrial Waste

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Hexavalent chromium biosorption by dried biomass of Aspergillus niger NUA101 isolated from Indian ultramafic complex

African Journal of Microbiology Research ◽

10.5897/ajmr2014.7048 ◽

2015 ◽

Vol 9 (4) ◽

pp. 220-229 ◽

Cited By ~ 3

Author(s):

Ghosh Suchhanda ◽

Mondal Arkamitra ◽

K Paul A

Keyword(s):

Aspergillus Niger ◽

Hexavalent Chromium ◽

Ultramafic Complex ◽

Chromium Biosorption

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Peanut Shell for Energy: Properties and Its Potential to Respect the Environment

Sustainability ◽

10.3390/su10093254 ◽

2018 ◽

Vol 10 (9) ◽

pp. 3254 ◽

Cited By ~ 16

Author(s):

Miguel-Angel Perea-Moreno ◽

Francisco Manzano-Agugliaro ◽

Quetzalcoatl Hernandez-Escobedo ◽

Alberto-Jesus Perea-Moreno

Keyword(s):

Energy Source ◽

Prediction Models ◽

Energy Content ◽

Co2 Reduction ◽

High Energy ◽

Peanut Shell ◽

Agroindustrial Waste ◽

Solid Biofuel ◽

Peanut Shells ◽

Industrial Heating

The peanut (Arachys hypogaea) is a plant of the Fabaceae family (legumes), as are chickpeas, lentils, beans, and peas. It is originally from South America and is used mainly for culinary purposes, in confectionery products, or as a nut as well as for the production of biscuits, breads, sweets, cereals, and salads. Also, due to its high percentage of fat, peanuts are used for industrialized products such as oils, flours, inks, creams, lipsticks, etc. According to the Food and Agriculture Organization (FAO) statistical yearbook in 2016, the production of peanuts was 43,982,066 t, produced in 27,660,802 hectares. Peanuts are grown mainly in Asia, with a global production rate of 65.3%, followed by Africa with 26.2%, the Americas with 8.4%, and Oceania with 0.1%. The peanut industry is one of the main generators of agroindustrial waste (shells). This residual biomass (25–30% of the total weight) has a high energy content that is worth exploring. The main objectives of this study are, firstly, to evaluate the energy parameters of peanut shells as a possible solid biofuel applied as an energy source in residential and industrial heating installations. Secondly, different models are analysed to estimate the higher heating value (HHV) for biomass proposed by different scientists and to determine which most accurately fits the determination of this value for peanut shells. Thirdly, we evaluate the reduction in global CO2 emissions that would result from the use of peanut shells as biofuel. The obtained HHV of peanut shells (18.547 MJ/kg) is higher than other biomass sources evaluated, such as olive stones (17.884 MJ/kg) or almond shells (18.200 MJ/kg), and similar to other sources of biomass used at present for home and industrial heating applications. Different prediction models of the HHV value proposed by scientists for different types of biomass have been analysed and the one that best fits the calculation for the peanut shell has been determined. The CO2 reduction that would result from the use of peanut shells as an energy source has been evaluated in all production countries, obtaining values above 0.5 ‰ of their total emissions.

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POTENTIAL USES OF THE PEEL AND SEED OF PASSIFLORA EDULIS SIMS F. EDULIS (GULUPA) FROM ITS CHEMICAL CHARACTERIZATION, ANTIOXIDANT, AND ANTIHYPERTENSIVE FUNCTIONALITIES

Asian Journal of Pharmaceutical and Clinical Research ◽

10.22159/ajpcr.2019.v12i10.33828 ◽

2019 ◽

pp. 104-112

Author(s):

LAURA GONZÁLEZ ◽

ANDREE ÁLVAREZ ◽

ELIZABETH MURILLO ◽

CARLOS GUERRA ◽

JONH MÉNDEZ

Keyword(s):

Antioxidant Capacity ◽

Phenolic Content ◽

Biological Activities ◽

Ethanolic Extract ◽

Seed Extract ◽

Added Value ◽

Trolox Equivalent Antioxidant Capacity ◽

Passiflora Edulis ◽

Agroindustrial Residues ◽

Agroindustrial Waste

Objective: Assess the performance of a crude ethanolic extract, a dichloromethane fraction and a hydroalcoholic residue, which are the basis for chemically and biologically characterizing the husk and seed of Passiflora edulis f. edulis, collected in the region and Colombia with a view to determining potential uses. Methods: Agroindustrial residues of gulupa (peel and seed) were analyzed through a bromatological study; subsequently, they were macerated with ethanol (96%). The crude ethanolic extract was partitioned with dichloromethane, leaving a hydroalcoholic residue. The content of total phenols, the composition of phytophenols (high-performance liquid chromatography-mass spectrometry), the total antioxidant capacity using 3-ethyl benzothiazoline-6-sulfonic acid (ABTS●+) and 2,2-diphenyl-1-pyridyl hydrazyl (DPPH●), the oxygen radical absorbance capacity (ORAC), and the ferric reduction power (FRAP) were determined to the extract, the fraction, and the residue. The evaluation of the inhibitory activity of the angiotensin-converting enzyme inhibitor (ACEI) and the cell viability assay with diphenyl bromide 3- (4,5-dimethylthiazole-2-) il) -2,5-tetrazolium on human leukocytes complemented the characterization. Results: Agroindustrial waste of P. edulis f. edulis, peel and seed, contains as main constituents: Protein (8.49 and 7.29%), fiber (34.2 and 55.7%), phosphorus (1.67 and 3.09), and boron (53.3 and 58.4 mg/kg), respectively. The seed showed 25.5% oil. The crude seed extract exhibited a higher phenolic content (15.34 gEAG/100 g). Likewise, it presented the highest antiradical capacity against ABTS●+ and DPPH● (706.17 and 82.81 trolox equivalent antioxidant capacity [TEAC], respectively) and antioxidant in ORAC and FRAP (142.79 TEAC and 103.63 equivalent ascorbic acid EAA, respectively). The ACEI activity (50% inhibitory concentration 17.62 mg/L) of the crude seed extract was higher than the other samples. No toxicity was found in the samples evaluated at concentrations higher than those of the biological activities manifested. Conclusion: The agroindustrial residues of P. edulis f. edulis (peel and seed) are rich in nutrients, which propose them for use in food matrices. The ethanolic extract from seed showed the highest antioxidant, antiradical, and inhibitory biological activity of the ACEI so that it could be proposed the gulupa seed as a promising phytotherapeutic product associated with its phenolic content, especially its flavonoids. The results obtained allow an added value to the fruit, reducing the chances that its waste contributes to environmental pollution.

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