scholarly journals Study on the Performance Identification of OpenCV in Cashew Nut Shell-based Activated Carbon

2021 ◽  
Vol 769 (3) ◽  
pp. 032030
Author(s):  
Jingchen Wang
Keyword(s):  
Activated Carbon ◽  
Cashew Nut ◽  
Cashew Nut Shell

scholarly journals Analisis Nilai Kapasitansi Komposit Lithium Besi Oksida (Li5FeO4) dan Karbon Aktif Kulit Biji Mete sebagai Bahan Dasar Elektroda Baterai Lithium: Efek Variasi Massa

2020 ◽  
Vol 5 (3) ◽  
pp. 233
Author(s):  
Ahmad Ahmad ◽  
Erniwati Erniwati ◽  
Vivi Hastuti RM
Keyword(s):  
Cyclic Voltammetry ◽  
Activated Carbon ◽  
Mass Fraction ◽  
Lithium Battery ◽  
Electrode Materials ◽  
Mass Composition ◽  
Solid State Method ◽  
Cashew Nut ◽  
Battery Electrode ◽  
Cashew Nut Shell

Previous researchers have investigated the manufacture of lithium battery electrode materials from Li5FeO4 composites with activated carbon of cashew nutshells. However, the effect of combining activated carbon to the lithium battery electrode material was not reviewed. The purpose of this study was to determine the effect of the comparison of the mass composition of Li5FeO4 and cashew nut shell active carbon on the capacitance value of the lithium battery electrode. These electrodes generated using the high-temperature solid-state method. The material used is iron oxide Fe2O3 from iron sand and LiOH.H2O, which homogenized with a sintering temperature of 850̊C for 15 hours with a ratio of 6/1 to produce Li5FeO4. Then Li5FeO4 was compiled with activated carbon of cashew nut shells with a mass fraction of activated carbon 60%, 50%, 40%, and 20%. Furthermore, it characterized using cyclic voltammetry. The results of cyclic voltammetry characterization for a mass fraction of 60% produce a capacitance of 4.7 F / g, a mass fraction of 50% produces a capacitance of 59.1 F / g, a mass fraction of 40% produces a capacitance of 87, 3 F / g, and a mass fraction of 20% produces capacitance of 243 F / g. From the four variations of mass fraction, the capacitance that meets the lithium battery electrode capacitance on the market is the mass fraction of 20%.

scholarly journals Exhaustive valorization of cashew nut shell waste as a potential bioresource material

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
James Nyirenda ◽  
Kadango Zombe ◽  
George Kalaba ◽  
Chipo Siabbamba ◽  
Inyambo Mukela
Keyword(s):  
Activated Carbon ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Acid Value ◽  
Cashew Nut Shell Liquid ◽  
Average Percentage ◽  
Cashew Nut ◽  
Spontaneous Interaction ◽  
Shell Waste ◽  
Cashew Nut Shell

AbstractIn this paper, we report extraction of cashew nut shell liquid (CNSL) from cashew nut shell waste (CNSW) and further use of residues for generation of activated carbon for removal of heavy metals and methylene blue (MB). Solvent extraction yielded 24.6 ± 0.4%, 38.2 ± 0.4% and 40.1 ± 0.9% for petroleum ether, hexane and ethanol respectively. Phytochemical screening showed presence of alkaloids, carbohydrates, saponins, phenols, tannins, flavonoids, amino acids, terpenoids, proteins, steroids, glycosides and carboxylic acids. The CNSL had a pH of 3.2, viscosity (104.6 ± 1.8 mPa s), moisture (6.5%), ash (1.6 ± 0.1%), refractive index (1.52 ± 0.001), specific density (0.9561 ± 0.0002 g/cm3), acid value (118.7 ± 9.2 mg KOH/g), free fatty acid value (60.1 ± 4.7%), saponification number (138.1 ± 3.2 mg KOH/g) and iodine value (188.1 ± 2.3 mgI 2/100 g). The average percentage removal of Cu (II), Pb (II), Cd (II) and Zn (II) was 99.4 ± 0.5, 95.4 ± 1.5, 99.5 ± 0.1, 98.4 ± 0.1%, and removal efficiency of MB at 50, 150, 250 and 350 mg/L was 99.63, 97.66, 96.48 and 94.81%, respectively. Equilibrium data were best described by the Freundlich isotherm model. The maximum monolayer adsorption capacity was 12.1 mg/g. The adsorption kinetics conformed to pseudo-second-order model. ∆G° was negative and a ∆H° of + 22.76 kJ/mol indicated that adsorption was endothermic. The ΔS° (+ 0.086 kJ/mol/K) showed that there was spontaneous interaction of the solution and adsorbate. These results show that CNSW is a potential bioresource for CNSL production for use in the paints, varnishes, surface coatings, agrochemicals and ethnomedicine industries. Residual shells can be exploited as fuels or converted to activated carbon for use as low-cost filters in water purification.

scholarly journals Detoxification of E-waste polluted site using cashew nut shell-based activated carbon

2021 ◽  
Author(s):  
Isaac Kow Tetteh ◽  
Christina Koli Gidisu ◽  
Alhassan Sulemana ◽  
Kodwo Miezah
Keyword(s):  
Activated Carbon ◽  
Activated Carbons ◽  
Electronic Waste ◽  
Polluted Soil ◽  
Environmental Research ◽  
Steam Boiler ◽  
Cashew Nut ◽  
Metal Contents ◽  
Polluted Sites ◽  
Cashew Nut Shell

Abstract This study considered the potential use of activated carbon (AC) produced from cashew nuts for remediation of electronic waste (E-waste) polluted soil sites at Agbogbloshie, Accra, Ghana. The AC supplied by Climate-Environmental Research and Technology (CLERET) Laboratory, one of the research and development (R&D) umbrellas of Explore Scientific Innovations Ltd., Ghana. It was prepared by a two-stage process involving wood-fired reactor for thermal pyrolysis at temperature ranging from 800–1000 oC, followed with activation with oxidizing gas generated by wood-fired steam boiler at 160 oC and 7.5 atm pressure for 30 minutes. The product was characterized based on bulk density, particle size, iodine number, electrical conductivity (EC), porosity, and pH. Three replicates of soil samples were scooped from at a depth of 0–15 cm using a soil auger from two randomly selected sites. The samples were digested with 10 ml of ternary solution (20 ml of HClO4; 500 ml of HNO3; 50 ml of H2SO4) on a hot plate at 90°C for 30 minutes to an hour and analyzed for selected heavy metals (Pb, Fe, Cu, Cr and Cd) using Atomic Absorption Spectrophotometer (AAS). The cashew nut shell-based AC significantly removed the heavy metal contents of the E-waste polluted soil with removal efficiency in the order: Cd (100%) > Pb (93%) > Fe (87%) > Cu (87%) > Cr (76%) for granular and Cd (100%) > Pb (98%) > Fe (96%) > Cu (94%) > Cr (87%) for powdered activated carbons. The slopes of the linear graph of the adsorption isotherms of the tested metals which is indicative of the quality of adsorption of the metals were in the order: Pb (0.9754) > Fe (0.9093) > Cr (0.8799) > Cu (0.8176) > Cd (0.7511). These agro-based waste materials therefore have great potential for effective detoxification of E-waste polluted sites.

scholarly journals Utilization of iron sand and activated carbon of cashew nut shell as a material basic of lithium battery

2019 ◽  
Author(s):  
Ahmad ◽  
Muhammad Abdullah Azam Undu ◽  
Suci Rahmadhani Ahmanas ◽  
Erniwati ◽  
Suritno Fayanto
Keyword(s):  
Activated Carbon ◽  
Lithium Battery ◽  
Cashew Nut ◽  
Cashew Nut Shell

scholarly journals Application of a cashew-based oxime in extracting Ni, Mn and Co from aqueous solution

2021 ◽  
Vol 8 (1) ◽  
Author(s):  
Chi M. Phan ◽  
Son A. Hoang ◽  
Son H. Vu ◽  
Hoang M. Nguyen ◽  
Cuong V. Nguyen ◽  
...  
Keyword(s):  
Organic Phase ◽  
Extraction Efficiency ◽  
Acidic Solution ◽  
Lithium Ion ◽  
Metal Extraction ◽  
Economic Potential ◽  
Cashew Nut ◽  
Valuable Metals ◽  
Loaded Organic Phase ◽  
Cashew Nut Shell

Abstract Background Cashew nut shell is a by-product of cashew (Anacardium occidentale) production, which is abundant in many developing countries. Cashew nut shell liquor (CNSL) contains a functional chemical, cardanol, which can be converted into a hydroxyoxime. The hydroxyoximes are expensive reagents for metal extraction. Methods CNSL-based oxime was synthesized and used to extract Ni, Co, and Mn from aqueous solutions. The extraction potential was compared against a commercial extractant (LIX 860N). Results All metals were successfully extracted with pH0.5 between 4 and 6. The loaded organic phase was subsequently stripped with an acidic solution. The extraction efficiency and pH0.5 of the CNSL-based extractant were similar to a commercial phenol-oxime extractant. The metals were stripped from the loaded organic phase with a recovery rate of 95% at a pH of 1. Conclusions Cashew-based cardanol can be used to economically produce an oxime in a simple process. The naturally-based oxime has the economic potential to sustainably recover valuable metals from spent lithium-ion batteries. Graphic abstract

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