Intensive insight into the enhanced utilization of rice husk ash: Abatement of rice mill wastewater and recovery of silica as a value added product

Abstract We synthesized mesoporous SiO2 nanomatrix using rice husks as a precursor through a facile thermal combustion process. XRD, FTIR, EDX, and TEM analyses were used to validate the produced mesoporous SiO2 nanomatrix. Electrochemical measurements were used to determine the specific capacitance of mesoporous SiO2 nanomatrix, and the results showed that the specific capacitances are 216, 204, 182, 163, 152, 142, 135, 133, 124.4, 124 F/g at current densities of 0.5, 1, 2, 4, 6, 8, 10, 12, 14, and 16 A/g. The benefit of impurities, as well as the large surface area and mesoporous structure of rice husk derived SiO2 nanostructures, allow Faradaic redox reactions at the electrode surface and the resulting supercapacitive behavior. This research might lead to a low-cost technique of producing supercapacitor electrodes using rice husk-derived SiO2 as a precursor.

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Clean and Efficient Synthesis of High-Quality Silica From Rice Husk Ash

10.21203/rs.3.rs-933474/v1 ◽

2021 ◽

Author(s):

Tang Baoyu ◽

Zhang Long ◽

Yu Zaiqian

Keyword(s):

Rice Husk ◽

Production Cost ◽

Rice Husk Ash ◽

Value Added ◽

Industrial Effluents ◽

Product Yield ◽

Complex Salt ◽

Chemical Precipitation ◽

Process Efficiency ◽

Waste Biomass

Abstract Rice husk ash derived from the rice husk, a renewable waste biomass resource from rice production can be used to produce high value-added silica materials with various applications. But present technologies suffer the shortages of using inorganic acid as the precipitating agent, complex salt-containing wastewater post-treatment, higher production cost, lower product quality, and without the recycling of process additives. In this paper, improved clean chemical precipitation characterizing of recycling the by-product and surfactant used is developed with the highest silica product yield of 99.3%, pore size (21-35 nm), and specific surface area (196-462 m2/g). After the by-product solution is reused 5 times, the yield of silica can still reach 99.1%. The recovery yield of surfactant is 95.3%. The properties of the prepared silica meet the standard of silica for specific applications. The process characterized the recycling of the by-product and surfactant in the process, greener CO2 precipitant, ensuring the greenness, process efficiency, and low production cost. This opens up a new industrialization practical way for up-grading utilization of waste biomass and CO2 containing industrial effluents.

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Production and characterization of a value added biochar mix using seaweed, rice husk and pine sawdust: A parametric study

Journal of Cleaner Production ◽

10.1016/j.jclepro.2018.08.002 ◽

2018 ◽

Vol 200 ◽

pp. 641-656 ◽

Cited By ~ 26

Author(s):

Goldy De Bhowmick ◽

Ajit K. Sarmah ◽

Ramkrishna Sen

Keyword(s):

Rice Husk ◽

Parametric Study ◽

Value Added ◽

Pine Sawdust ◽

A Value

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Effect of Rice Husk Ash Silica as Cement Replacement for Making Construction Mortar

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.775.624 ◽

2018 ◽

Vol 775 ◽

pp. 624-629

Author(s):

Kantapong Boontawee ◽

Withit Pansuk ◽

Luangvaranunt Tachai ◽

Katsuyoshi Kondoh

Keyword(s):

Compressive Strength ◽

Citric Acid ◽

Rice Husk ◽

Compression Strength ◽

Rice Husk Ash ◽

Environmentally Friendly ◽

Carbon Residue ◽

Cement Replacement ◽

A Value ◽

Treated Carbon

Rice husk ash (RHA) is used as a replacement to cement to produce mortar. The effect of 5, 10, and 15wt% addition to the density and compressive strength of mortar is investigated. It was found that with the increasing addition of RHA causes the decrease of compressive strength and density of mortars. Compressive strength of mortar drops with addition of RHA, from a value of 42 MPa of no RHA addition, to 24 MPa of 15wt% RHA addition. Reduction in compression strength may be due to the decrease in density, which arises from porous RHA. This is more dominant in mortar made from addition of RHA without prior acid treated. Carbon residue and impurity in RHA further reduce the compressive strength of mortar. In addition, this research validate the use of a more environmentally friendly citric acid for partially removal of oxide impurities prior to burning the rice husk.

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Rice Husk Ash as a Renewable Source for the Production of Value Added Silica Gel and its Application: An Overview

BULLETIN OF CHEMICAL REACTION ENGINEERING AND CATALYSIS ◽

10.9767/bcrec.7.1.1216.1-25 ◽

2012 ◽

Vol 7 (1) ◽

Cited By ~ 32

Author(s):

Ram Prasad ◽

Monika Pandey

Keyword(s):

Silica Gel ◽

Rice Husk ◽

Rice Husk Ash ◽

Value Added ◽

Renewable Source

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Utilization of Rice Husk Ash in the Preparation of Graphene-Oxide-Based Mesoporous Nanocomposites with Excellent Adsorption Performance

Materials ◽

10.3390/ma14051214 ◽

2021 ◽

Vol 14 (5) ◽

pp. 1214

Author(s):

Tzong-Horng Liou ◽

Yuan Hao Liou

Keyword(s):

Electron Microscopy ◽

Graphene Oxide ◽

Adsorption Capacity ◽

Surface Area ◽

Rice Husk ◽

Rice Husk Ash ◽

High Surface ◽

Dye Adsorption ◽

Value Added ◽

Biomass Waste

Rice husk is an agricultural biomass waste. Burning rice husks in an oxygenic atmosphere releases thermal energy and produces ash that is rich in silica. Rice husk ash (RHA) can be used as a sustainable source of silica for producing high-value-added products. In this study, mesostructural graphene oxide (GO)/SBA-15, a graphene-based hybrid material, was synthesized from RHA. The materials are inspected by Fourier transform infrared spectrometer, Raman spectrometer, field-emission scanning electron microscopy, transmission electron microscopy, surface area analyzer, and X-ray diffraction analyzer. Studies have revealed that GO/SBA-15 possesses various oxygen functional groups that are helpful for dye adsorption. The material consisted of high pore volume of 0.901 cm3/g, wide pores of diameter 11.67 nm, and high surface area of 499 m2/g. Analysis of the methylene blue (MB) adsorption behavior of GO/SBA-15 composites revealed that their adsorption capacity depended on the gelation pH, GO content, adsorbent dosage, and initial dye (MB) concentration. The highest adsorption capacity of GO/SBA-15 was 632.9 mg/g. Furthermore, the adsorption isotherms and kinetics of GO/SBA-15 were investigated. This study demonstrated the great advantage of treated RHA and the potential of this material for use in organic dye adsorption.

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