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Water contamination by petroleum and its byproducts presents a major challenge worldwide. It is critical that sustainable treatment methods be employed for the removal of such contaminants from polluted water. For this investigation, magnetic nano silica (M-NS) was synthesized using agricultural waste from barley husk using a two-step process that is environmentally friendly and uses green chemistry synthesis. The barley husk waste was used as a precursor for the synthesis of nano-silica following a low energy and sustainable method of acid reflux and heat treatment. Nano-silica was then used for the synthesis of M-NS, with the addition of a magnetic solution of Fe3O4 nanoparticles. The magnetic nano-silica particles were characterized using scanning electron microscopy (SEM), Fourier transform infrared (FTIR), Zeta potential analysis (ZETA) and X-Ray Diffraction (XRD). Magnetic nano-silica particles were observed to have an average diameter of 162 nm and appeared to be hydrophobic, with a large surface area of ~120 m2/gm. Due to these characteristics, magnetic nano-silica was used as an adsorbent for the removal of petrol contaminants from water. The experimental procedure showed that only 0.6 gm. of M-NS was used on 40 mg/L concentration of petroleum and the experiments recorded a high uptake efficiency of 85%. The sorption was shown to be an effective process since a high amount of petroleum was removed. The study further demonstrates that as the amount of sorbent is increased, the sorption capacity also increases until an equilibrium is reached. The results of this study establish that synthesis of M-NS, using environmentally sustainable processes, has the required characteristics to serve as sorbent for petroleum and its byproducts from contaminated water, thus enhancing environmental sustainability.
Evidence Akhayere; Ashok Vaseashta; Doga Kavaz. Novel Magnetic Nano Silica Synthesis Using Barley Husk Waste for Removing Petroleum from Polluted Water for Environmental Sustainability. Sustainability 2020, 12, 10646 .
AMA StyleEvidence Akhayere, Ashok Vaseashta, Doga Kavaz. Novel Magnetic Nano Silica Synthesis Using Barley Husk Waste for Removing Petroleum from Polluted Water for Environmental Sustainability. Sustainability. 2020; 12 (24):10646.
Chicago/Turabian StyleEvidence Akhayere; Ashok Vaseashta; Doga Kavaz. 2020. "Novel Magnetic Nano Silica Synthesis Using Barley Husk Waste for Removing Petroleum from Polluted Water for Environmental Sustainability." Sustainability 12, no. 24: 10646.
In the present study, a comparative analysis was performed on the extraction of nickel ions (Ni2+) from agricultural wastewater using nanosilica (NS) synthesized from barley (NS-B) and wheat (NS-W) grass waste with a yield of 92.4%. The experimental procedure was conducted on barley and wheat waste to obtain an 85% pure NS that served as the adsorbent for nickel extraction in wastewater. The NS was characterized and studied using X-ray fluorescence (XRF), which demonstrated that NS synthesized from barley contained 94.2% SiO2, while NS synthesized from wheat contained 93.0% SiO2. Scanning electron microscopy (SEM) and atomic force microscopy (AFM) were used to determine the surface morphology of the nanoparticles. The energy-dispersive X-ray (EDX) analysis and Fourier transform infrared (FTIR) analysis were used to determine the elements and functional groups of the synthesized particles, respectively. Lastly, particle size and surface area analyses were performed using the Brunauer–Emmett–Teller (BET) method, which determined that the nanoparticles were 70 and 102 nm for NS-B and NS-W, respectively. The adsorption of nickel ions from agricultural wastewater was studied at various concentrations (10–200 mg/L). The kinetic models indicate that sorption equilibrium time was 65 min and that the reaction followed the pseudo-first-order kinetics model with a regression coefficient (R2) of 0.9289. Corresponding studies indicated that the Freundlich isotherms best describe the sorption reaction with an R2 value of 0.9958, which indicates the multilayer adsorption of nickel on the adsorbent. In their standard and real states, the samples indicated that NS-B and NS-W provided high levels of nickel (Ni2+) removal at 95 and 90%, respectively.
Evidence Akhayere; Edidiong Augustine Essien; Doga Kavaz. Effective and reusable nano-silica synthesized from barley and wheat grass for the removal of nickel from agricultural wastewater. Environmental Science and Pollution Research 2019, 26, 25802 -25813.
AMA StyleEvidence Akhayere, Edidiong Augustine Essien, Doga Kavaz. Effective and reusable nano-silica synthesized from barley and wheat grass for the removal of nickel from agricultural wastewater. Environmental Science and Pollution Research. 2019; 26 (25):25802-25813.
Chicago/Turabian StyleEvidence Akhayere; Edidiong Augustine Essien; Doga Kavaz. 2019. "Effective and reusable nano-silica synthesized from barley and wheat grass for the removal of nickel from agricultural wastewater." Environmental Science and Pollution Research 26, no. 25: 25802-25813.
In this investigation we report the synthesis of nano silica (NS) nanoparticles from barley grass waste – an environmental burden – using varying temperatures during preparation. The temperatures used during the investigation were 400, 500, 600, and 700ºC, and we studied its effects on the...
Evidence Akhayere; Doga Kavaz; Ashok Vaseashta. Synthesizing Nano Silica Nanoparticles from Barley Grain Waste: Effect of Temperature on Mechanical Properties. Polish Journal of Environmental Studies 2019, 28, 2513 -2521.
AMA StyleEvidence Akhayere, Doga Kavaz, Ashok Vaseashta. Synthesizing Nano Silica Nanoparticles from Barley Grain Waste: Effect of Temperature on Mechanical Properties. Polish Journal of Environmental Studies. 2019; 28 (4):2513-2521.
Chicago/Turabian StyleEvidence Akhayere; Doga Kavaz; Ashok Vaseashta. 2019. "Synthesizing Nano Silica Nanoparticles from Barley Grain Waste: Effect of Temperature on Mechanical Properties." Polish Journal of Environmental Studies 28, no. 4: 2513-2521.
The parabolic trough collector (PTC) is one of the most advanced solar concentrating technology available. The study employed experimental synthesis and numerical modeling to present possible solutions to the challenges of nanofluids application in solar collectors. A green alternative of using nanoparticles synthesized from green bio-matter (Olive leaf extract OLE) and agricultural waste (barley husk BH) is proposed. The synthesized nanoparticles were characterized using analytical and morphological techniques and were found to be efficient corrosion inhibitor, non-toxic and cheap to produce when compared to the conventional ones. The study presents an innovative thermal performance evaluation of a parabolic trough collector operating with green-synthesized nanofluids: water/BH-SiO2 and water/OLE-TiO2. The model of the PTC was developed on the engineering equation solver (EES) and validated using the experimental results of the Sandia National Laboratory (SNL), AZTRAK platform LS-2 test. The results of the analysis show that a 0.073% mean enhancement in the thermal efficiency is observed with the use of water/BH-SiO2 nanofluids and 0.077% mean enhancement with the use of water/OLE-TiO2 nanofluids. The heat transfer performance of the nanofluids shows a mean enhancement in heat transfer coefficient of 128% and 138% for water/OLE-TiO2 and water/BH-SiO2 nanofluids respectively. The mean variation in pressure losses between the nanofluids and base fluid was also observed to be less than 14.85% at a 3% volumetric fraction of nanoparticles.
Eric Chekwube Okonkwo; Edidiong A. Essien; Evidence Akhayere; Muhammad Abid; Doga Kavaz; Tahir Abdul Hussain Ratlamwala. Thermal performance analysis of a parabolic trough collector using water-based green-synthesized nanofluids. Solar Energy 2018, 170, 658 -670.
AMA StyleEric Chekwube Okonkwo, Edidiong A. Essien, Evidence Akhayere, Muhammad Abid, Doga Kavaz, Tahir Abdul Hussain Ratlamwala. Thermal performance analysis of a parabolic trough collector using water-based green-synthesized nanofluids. Solar Energy. 2018; 170 ():658-670.
Chicago/Turabian StyleEric Chekwube Okonkwo; Edidiong A. Essien; Evidence Akhayere; Muhammad Abid; Doga Kavaz; Tahir Abdul Hussain Ratlamwala. 2018. "Thermal performance analysis of a parabolic trough collector using water-based green-synthesized nanofluids." Solar Energy 170, no. : 658-670.