scholarly journals Evaluation of Rice Husk Ash from Different Rice Varieties from Nigeria: Silica Content and Lethality to Two Storage Beetles

2021 ◽  
Vol 11 (2) ◽  
Author(s):  
Atewoja Y. Y. ◽  
Ofuya T. I. ◽  
Idoko J. E. ◽  
Adebayo R. A.
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Silica Content ◽  
Rice Varieties

scholarly journals PRODUCTION OF SODIUM SILICATE FROM RICE HUSK ASH WITH REGULATORY SETS MAGNESIUM

Tibuana ◽  
2020 ◽  
Vol 3 (01) ◽  
pp. 47-52
Author(s):  
Yanatra budi Pramana ◽  
M. Amin Pahlevi ◽  
Zhulianto Ashari ◽  
M. Fariz Effendi ◽  
Fibra Gilang Ramadhan
Keyword(s):  
Sodium Silicate ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Silica Content ◽  
Cosmetic Products ◽  
Rice Husks ◽  
Mg Addition ◽  
Increase Silica Content

Utilization of rice husks in Indonesia in general is still very limited. Utilization of silica contained in rice husk ash, which has been used, among others, in the manufacture of sodium silicate. Silica compounds themselves can be used in and manufacturing basic materials for electronic and ceramic equipment, glass, rubber, cosmetic products, and pharmaceuticals. The addition of Mg can increase the silica content (SiO2) in rice husk ash. The best results show an effective Mg ratio of Mg addition to increase silica content is 1: 1. produces the highest amount of silica which is 58.12% of the rice husk ash with a size of 140 mesh

scholarly journals Karakterisasi Bionanofiller Dari Limbah Padi Sebagai Alternatif Penguatan Pada Polimer Komposit

2018 ◽  
Vol 3 (2) ◽  
Author(s):  
Eryani . ◽  
Sri Aprilia ◽  
Farid Mulana
Keyword(s):  
Rice Straw ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Particle Density ◽  
Agricultural Waste ◽  
Xrd Analysis ◽  
Silica Content ◽  
Sem Analysis ◽  
Agricultural Produce ◽  
Mechanical Properties Characterization

<p>Agricultural waste such as rice straw, rice husk and rice husk ash have not been utilized properly. This waste of agricultural produce can actually be used as an alternative to bionanofiller because it contains an excellent source of silica. The silica content contained in the rice waste when combined with the polymer matrix can produce composites having high thermal and mechanical properties. Characterization of bionanofiller from this rice waste is done by SEM, XRF, FTIR, XRD and particle density. The result of SEM analysis from this rice waste is feasible to be used as filler because it has size 1 μm. Likewise with the results of XRF analysis that rice waste contains a high enough silica component that is 80.6255% - 89.83%. FTIR test results also show that bionanoparticles from rice waste have the same content of silica. In the XRD analysis the best selective gain of rice waste is found in rice husk ash which is characteristic of amorp silica at a range of 2ϴ = 22<br />. The largest density analysis of paddy waste was found in rice husk 0.0419 gr / cm , followed by rice straw by of 0.0417 gr / cm 3 and rice hulk ash 0.0407 g / cm 3</p>

scholarly journals The Surface Hardness of Mild Steel and Plywood Coated With Different Blending Ratio of Rice Husk Ash-Based Geopolymer

2019 ◽  
Vol 8 (3) ◽  
pp. 1849-1853
Keyword(s):  
Mild Steel ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Surface Hardness ◽  
Hardness Test ◽  
Silica Content ◽  
Rockwell Hardness ◽  
Water Based ◽  
Physical Effects ◽  
Epoxy Paint

Malaysia has a great potential to reuse the agro-waste and reduce the environmental issues generated from the painting industry and agro-waste and achieve the objective of sustainable development. The objective of this work is to analyse physical effects of different blending ratio of rice husk ash based geopolymer binder (GB) surface coating on the hardness of mild steel and plywood. Geopolymer is an inorganic material produced by activated alkaline solution and aluminosilicate sources. Since Malaysia has been producing abundant of rice husk, this rice husk as the aluminosilicate source is used to form geopolymer. As it is known that filler is one of the combinations in paint including epoxy paint, the rice husk ash which has an abundant of silica content can be a ground-breaking source. Thus, an efficient eco-friendly coating that have a good fire resistance properties are very demanding. An optimum coating was formed by optimizing different ratio of GB with water-based or oil- based paint in term of hardness of surface coated. Based on the Rockwell hardness test, the result showed that 2:1 ratio of water-based coated mild steel plate has the highest Rockwell hardness number of 53.08, which meant the lowest depth of impression of 0.1538mm due to 150kgf major and minor load. This implies that different blending ratios addition of GB on plate surface have an effect on the hardness of mild steel and plywood

scholarly journals Pemanfaatan Abu Ampas Tebu dan Abu Sekam Padi Sebagai Pozzolan dengan Agregat Kasar Batu Skoria pada Beton Ringan Struktural

Rekayasa ◽  
2020 ◽  
Vol 13 (2) ◽  
pp. 112-117
Author(s):  
Dwi Nurtanto ◽  
Muhammad Fahad Kustantiyo ◽  
Nanin Meyfa Utami ◽  
Hernu Suyoso
Keyword(s):  
Sugarcane Bagasse ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Lightweight Concrete ◽  
Agricultural Waste ◽  
Combustion Products ◽  
Silica Content ◽  
Crushing Strength ◽  
Volume Weight ◽  
Pozzolanic Properties

Study ini membandingkan kuat hancur, berat volume antara beton ringan dengan beton dengan mengganti sebagian semen (PC) dengan limbah pertanian.  Limbah pertanian yang dimaksud adalah sekam padi dan ampas tebu. Penggunaan limbah pertanian tersebut sebaga material pengganti semen dikarenakan mempunyai sifat pozzolan yang cukup tinggi.  Pemakaian limbah pertanian ini dengan membakar ampas tebu dan sekam padi dengan suhu tertentu sehingga menjadi abu. Limbah tebu diambil dari Pabrik Gula Prajekan Bondowoso, dibakar dengan suhu 8000C  selama 8 jam. Limbah Padi diambil dari limbah Pabrik Padi di Kalisat Jember, dibakar dengan suhu 8500C selama 45 menit. Kandungan silika dari hasil pembakaran tersebut masing-masing sebesar 59,5% dan 79,5% . Prosentase pengganti sebagian PC sebesar 5%, 10%, 15% dan 20%, dengan perbandingan campuran abu ampas tebu (AAT) dan abu sekam padi (ASP) adalah 1:1. Pengujian dilakukan pada umur 28 hari dengan bentuk benda uji silender berukuran 10x20 cm. Hasil kuat hancur tertinggi pada benda uji dengan subsitusi PC sebesar 5% dan berat volume yang terendah pada benda uji dengan pengantian semen sebesar 20%. Effect of Cement Substitution with Agricultural Waste on Lightweight Structural ConcreteThis study compares the shattering strength, volume weight between lightweight concrete and concrete by replacing part of the Portland cement (PC) with agricultural waste. The agricultural waste in question is rice husk and sugarcane bagasse. The use of agricultural waste is as a substitute for cement because it has quite high pozzolanic properties. Use of this agricultural waste by burning sugarcane bagasse and rice husk with a certain temperature so that it becomes ash. Sugarcane waste is taken from Bondowoso Prajekan Sugar Mill, burned at 8000C for 8 hours. Rice waste is taken from the rice factory waste in Kalisat Jember, burned at 8500C for 45 minutes. The silica content of the combustion products was 59.5% and 79.5%, respectively. The percentage of partial PC replacement is 5%, 10%, 15%, and 20%, with a ratio of bagasse ash (BA) to rice husk ash (RHA) is 1: 1. The test was carried out at 28 days in the form of a 10 x 20 cm slender test object. The highest yield of crushing strength in specimens with PC substitution of 5% and the lowest volume weight in specimens with cement replacement of 20%.

scholarly journals INVESTIGATION OF THE INFLUENCE OF PARTICLE SIZE OF RICE HUSK ASH AS ADSORBENT FOR MERCURY IN COLUMN ADSORPTION SYSTEM

Konversi ◽  
2021 ◽  
Vol 10 (2) ◽  
Author(s):  
Desi Nurandini ◽  
Riani Ayu Lestari ◽  
Isna Syauqiah ◽  
Ahmad Rizalli ◽  
Ryan Rahmatullah
Keyword(s):  
Heavy Metals ◽  
Particle Size ◽  
Rice Husk ◽  
Adsorption Process ◽  
Rice Husk Ash ◽  
Liquid Waste ◽  
Silica Content ◽  
Column Adsorption ◽  
Before And After ◽  
Adsorbent Particle

The presence of heavy metal mercury (Hg2+) in liquid waste has caused serious problems to environmental pollution. One of the most effective method to reduce the levels of heavy metals mercury (Hg2+) in liquid waste is adsorption. Rice husk ash is highly potential to adsorb heavy metals in water because it is a porous material with a high silica content. Therefore, rice husk ash can be used as an adsorbent for heavy metals in liquid waste. The purpose of this study was to determine the level of mercury (Hg2+) that can be adsorbed from the column adsorption process using adsorbent of rice husk ash and to determine the optimum mass of rice husk ash as an adsorbent. The research was conducted using a series of simple adsorption column tools with a circulation time of 120 minutes. While the independent variables were adsorbent particle size of 50, 100, and 200 mesh. Measurement of mercury (Hg2+) levels was carried out on samples before and after treatment with Atomic Absorption Spectrophotometer (AAS). The results showed a significant decrease in Hg2+ levels with the optimum adsorbent particle size of 200 mesh. The value of the adsorbed Hg2+ ion content reached 101.670 mg/L in the adsorption process using adsorbent with 200 mesh particle size . 

The Utility of Rice Husk Ash from Biomass Power Plant of Nakhon Ratchasima Province for Synthesis of Nano-Silica for Using Cathode Material of Lithium Ion Battery

2018 ◽  
Vol 766 ◽  
pp. 51-57
Author(s):  
Onlamee Kamon In ◽  
Suthum Srilomsak ◽  
Nonglak Meethong
Keyword(s):  
Chemical Composition ◽  
Silica Nanoparticles ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Lithium Ion ◽  
Physical Structure ◽  
Silica Content ◽  
Chemical Extraction ◽  
Composition Analysis ◽  
Sem Images

The high purity nanosilica materials could preparation from different synthesis route. In this research, rice husk ash was extracted into silica powder, by chemical extraction method. Then, chemical composition analysis with XRF technique. In addition, the extracted silica nanoparticles were analyzed by XRD technique. Physical structure of nanoscale particles by SEM imaging. The results showed that the chemical composition of rice husk ash consists mainly of silica. While, the extracted silica nanoparticles had a high silica content of 99.9999%. In addition, silica extracted with silica nanoparticles was confirmed by XRD at position 2θ ≈ 22° and the crystalline extracts were amorphous to the physical characteristics of the SEM images. In the future, nanosilicon powder may be used to synthesize lithium-ion batteries.

Effect of Acid Leaching on Different State of Rice Husk

2020 ◽  
Vol 1010 ◽  
pp. 532-537
Author(s):  
Nur Haslinda Mohamed Muzni ◽  
Noorina Hidayu Jamil ◽  
Faizul Che Pa ◽  
Wan Mohd Arif
Keyword(s):  
Citric Acid ◽  
Rice Husk ◽  
Amorphous Silica ◽  
High Purity ◽  
Rice Husk Ash ◽  
Combustion Process ◽  
Acid Leaching ◽  
Silica Content ◽  
Composition Analysis ◽  
Surface Areas

Rice husks (RH) are agricultural wastes available abundantly in rice producing country. A by-product obtained from combustion of rice husk is rice husk ash (RHA) which is rich in silica (SiO2) contents. This paper focused on the effect of acid leaching treatment on rice husk to produce high-purity silica. There are 4 different states of conditions involved; raw rice husk (RRH), treated rice husk (TRH), rice husk ash (RHA), and treated rice husk ash (TRHA). Citric acid; C6H8O7 was used as a leaching agent. TRH and TRHA was leached to see whether treated rice husk before combustion (TRH) or treated rice husk after combustion (TRHA) will produce more high-purity silica. Chemical composition analysis shows high amorphous silica content which is 98.47% with low metallic impurities at 1.0M C6H8O7, 70 oC for treated rice husk (TRH). X-ray diffraction (XRD) pattern shows the presence of amorphous silica in treated rice husk (TRH) and crystalline silica in treated rice husk ash (TRHA). Fragmentation of TRH into small pieces after acid leaching is seen where there is significant increase in the exposed surface areas. High-purity amorphous silica with more than 98% was prepared via citric acid leaching treatment and combustion process.

scholarly journals Rice Husk Ash-Based Concrete Composites: A Critical Review of Their Properties and Applications

Crystals ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 168
Author(s):  
Mugahed Amran ◽  
Roman Fediuk ◽  
Gunasekaran Murali ◽  
Nikolai Vatin ◽  
Maria Karelina ◽  
...  
Keyword(s):  
Rice Husk ◽  
Building Materials ◽  
Rice Husk Ash ◽  
Cost Effective ◽  
Silica Content ◽  
Emission Rates ◽  
Cement Production ◽  
Clean Environment ◽  
High Silica ◽  
Mineral Fillers

In the last few decades, the demand for cement production increased and caused a massive ecological issue by emitting 8% of the global CO2, as the making of 1 ton of ordinary Portland cement (OPC) emits almost a single ton of CO2. Significant air pollution and damage to human health are associated with the construction and cement industries. Consequently, environmentalists and governments have ordered to strongly control emission rates by using other ecofriendly supplemental cementing materials. Rice husk is a cultivated by-product material, obtained from the rice plant in enormous quantities. With no beneficial use, it is an organic waste material that causes dumping issues. Rice husk has a high silica content that makes it appropriate for use in OPC; burning it generates a high pozzolanic reactive rice husk ash (RHA) for renewable cement-based recyclable material. Using cost-effective and commonly obtainable RHA as mineral fillers in concrete brings plentiful advantages to the technical characteristics of concrete and to ensure a clean environment. With RHA, concrete composites that are robust, highly resistant to aggressive environments, sustainable and economically feasible can be produced. However, the production of sustainable and greener concrete composites also has become a key concern in the construction industries internationally. This article reviews the source, clean production, pozzolanic activity and chemical composition of RHA. This literature review also provides critical reviews on the properties, hardening conditions and behaviors of RHA-based concrete composites, in addition to summarizing the research recent findings, to ultimately produce complete insights into the possible applications of RHA as raw building materials for producing greener concrete composites—all towards industrializing ecofriendly buildings.

scholarly journals Effect of Partial Replacement of Cement by Quarry Dust, Rice Husk Ash with using Polyester Fiber in Concrete

2019 ◽  
Vol 8 (4) ◽  
pp. 9522-9524
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Silica Content ◽  
Living Environment ◽  
Polyester Fiber ◽  
Partial Replacement ◽  
Total Replacement ◽  
Binding Material ◽  
Marble Dust ◽  
Quarry Dust

Generally Portland cement is used as binding material in concrete which liberates large amount of co2 while manufacturing. Hence there is an urgent need for proper attention and to minimize their impact on the sustainability of our living environment. In this study quarry dust and Rice husk ash were partially replaced for cement material, And adding the polyester fiber to strengthening the rebar. In this investigation marble dust and rice husk ash are used as a replacement for cement in various proportions such as 0%, 10%, 15%, 20%, 30% in a total replacement of 30% of cement, Where in each proportion the remaining percentage is filled by the Rice husk ash. Marble dust contains more than 50% of silica content in it. Study of Index property and engineering property were obtained in laboratory. Cube casted along the polyester fiber with aspect ratio 100 is adding as reinforcement agent. Polyester had added as 0.1% .

Optimum Partial Replacement of Cement by Nanosilica, Microsilica and Rice Husk Ash for Mass Production of Concrete

2017 ◽  
Vol 751 ◽  
pp. 544-549
Author(s):  
Winai Ouypornprasert ◽  
Narong Traitruengtatsana ◽  
Kong Kamollertvara
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Activity Index ◽  
Silica Content ◽  
Partial Replacement ◽  
Mass Concrete ◽  
Mean Values ◽  
Nonnormal Distributions ◽  
Concrete Production ◽  
High Silica

The objective of this technical paper was to propose the use of optimum partial replacement of cement by pozzolan of high-silica content i.e. nanosilica, silica fume and rice husk ash. Firstly cement hydration, pozzolanic reactions of pozzolan and stoichiometry were reviewed. Then the optimum fractional replacement of cement by pozzolan based on the complete consumption of calcium hydroxide and the strength activity index (SAI) were formulated and proposed. After that the results of a series of tests of cement mortars were shown to verify the proposed concepts. The applicability for the mass concrete production was demonstrated by prediction of mean values of nonnormal distributions from the corresponding specifications.

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