Studi Variasi Konsentrasi NaOH dan H2SO4 Untuk Memurnikan Silika Dari Abu Sekam Padi Sebagai Adsorben Ion Logam Pb2+ dan Cu2+

A study of variations in the concentration of NaOH and H2SO4 to purify silica from rice husk ash and its application as adsorbent of Pb2+ and Cu2+ Metal Ions. The NaOH concentrations used were 8%, 9%, 10%, 11%, 12% and 13% and H2SO4 concentrations were 5.4%, 8.16%, 10.88%, and 13.61%. The process of adsorption of Pb2+ and Cu2+ metal ions was carried out at pH (3, 4, 5, 6) and silica masses. The results showed the silica yield obtained in the form of white powder. The highest silica content at 12% NaOH concentration of 41.81% with a purity of 89.09% and H2SO4 concentration is 10.88% at 65.39% with a purity of 94.94% initial content 86.02%. The results of surface structure characterization using Scanning Electron Microscope (SEM) average size of particle diameter was 0.030 µm. Optimal adsorption process of Pb2+ and Cu2+ metal ions using silica from rice husk occurred at pH 6 and the adsorbent mass was 0.3 gram, the adsorption efficiency was 98% and 86.25% respectively with adsorption capacity of 0.96 mg/g for metal Pb2+ and 0.83 mg/g for Cu2+ metals.

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

Konversi ◽

10.20527/k.v10i2.11726 ◽

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 .

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

Tibuana ◽

10.36456/tibuana.3.01.2200.47-52 ◽

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

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Synthesis of Silica-Salen Derivative from Rice Husk Ash and its Use for Extraction of Divalent Metal Ions Co(II), Ni(II) and Cu(II)

Indonesian Journal of Chemistry ◽

10.22146/ijc.38558 ◽

2019 ◽

Vol 20 (1) ◽

pp. 16 ◽

Cited By ~ 1

Author(s):

Duha Hussien Attol ◽

Hayder Hamied Mihsen

Keyword(s):

Metal Ions ◽

Rice Husk ◽

Rice Husk Ash ◽

Sol Gel ◽

Xrd Analysis ◽

Divalent Metal Ions ◽

Prepared Compound ◽

Absorption Bands ◽

Pseudo Second Order ◽

Ft Ir

Rice husk ash (RHA) was used to prepare sodium silicate, which in turn was functionalized with 3-(chloropropyl)triethoxysilane employing the sol-gel technique to form RHACCl. Chloro group in RHACCl was replaced with iodo group forming RHACI. Ethylenediamine was immobilized on RHACI in order to prepare it for the reaction with salicylaldehyde to form a silica derivative-salen. FT-IR analysis indicated the presence of secondary amine and –NH and C=N absorption bands. XRD analysis revealed the occurrence of the broad diffused peak with maximum intensity at 22–23° (2θ). BET measurements showed also that the surface area of the prepared compound is 274.55 m2/g. Elemental analysis proved the existence of nitrogen in the structure of the prepared compound. The silica derivative-salen showed high potential for extraction and removal of heavy contaminating metal ions Ni(II), Cu(II), and Co(II) from aqueous solutions. The kinetic study demonstrates that the adsorption of the metal ions follows the pseudo-second order.

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Karakterisasi Bionanofiller Dari Limbah Padi Sebagai Alternatif Penguatan Pada Polimer Komposit

Jurnal Serambi Engineering ◽

10.32672/jse.v3i2.717 ◽

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>

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Synthesis of zeolite L using rice husk ash silica for adsorption of methylene blue: kinetic and adsorption isotherm

MATEC Web of Conferences ◽

10.1051/matecconf/201819705002 ◽

2018 ◽

Vol 197 ◽

pp. 05002 ◽

Cited By ~ 3

Author(s):

Citra Deliana Dewi Sundari ◽

Soni Setiadji ◽

Yusuf Rohmatullah ◽

Sanusi Sanusi ◽

Denia Febby Nurbaeti ◽

...

Keyword(s):

Methylene Blue ◽

Rice Husk ◽

Adsorption Process ◽

Rice Husk Ash ◽

Freundlich Isotherm ◽

Particle Morphology ◽

Absorption Capacity ◽

Molar Ratio ◽

Blue Dye ◽

Zeolite L

Rice husk has a high silica content, so it can be utilized as silica source for zeolite synthesis. In this research, synthesis of zeolite L has been done using silica from rice husk ash without organic template. The synthesized zeolite L is then used as an adsorbent to adsorb methylene blue dye. The steps of zeolite L synthesis include: silica extraction from rice husk ash using NaOH and zeolite L synthesis using hydrothermal method with molar ratio 10 SiO2: Al2O3: 4 K2O: 100 H2O at 170°C for 24 hours. The resulting Zeolite L was then characterized by XRD and SEM. The absorption capacity of methylene blue solution by zeolite L was observed experimentally through the effect of pH of the solution, contact time, and initial concentration of the solution, then determining the isotherm and its absorption kinetics. From XRD and SEM results of zeolite L sample, it is shown that zeolite L has been formed and its particle morphology is a hollow cylinder with cylinder diameter of 0.049 - 0.123 μm. The adsorption process refers to the Freundlich isotherm model which provides the highest correlation coefficient. The methylene blue adsorption process by zeolite L follows pseudo second-order kinetics.

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Optimization of parameters for adsorption of metal ions onto rice husk ash using Taguchi's experimental design methodology

Chemical Engineering Journal ◽

10.1016/j.cej.2007.09.030 ◽

2008 ◽

Vol 140 (1-3) ◽

pp. 136-144 ◽

Cited By ~ 41

Author(s):

Vimal Chandra Srivastava ◽

Indra Deo Mall ◽

Indra Mani Mishra

Keyword(s):

Experimental Design ◽

Metal Ions ◽

Rice Husk ◽

Design Methodology ◽

Rice Husk Ash ◽

Optimization Of Parameters ◽

Adsorption Of Metal Ions ◽

Experimental Design Methodology

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

International Journal of Recent Technology and Engineering - 2 ◽

10.35940/ijrte.c4641.098319 ◽

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

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A STUDY ON KINETIC AND THERMODYNAMIC ADSORPTION OF FLUORIDE IN AQUEOUS SOLUTION ONTO ALUMINIUM HYDROXIDE COATED RICE HUSK ASH

Vietnam Journal of Science and Technology ◽

10.15625/0866-708x/54/6/7703 ◽

2016 ◽

Vol 54 (6) ◽

pp. 737

Author(s):

Tran Ngoc Tuyen ◽

Nguyen Duc Vu Quyen ◽

Ho Van Minh Hai ◽

Tran Ngoc Quang ◽

Hoang Trong Sy ◽

...

Keyword(s):

Rice Husk ◽

Rice Husk Ash ◽

Water Sampling ◽

First Order ◽

Fluoride Adsorption ◽

Monolayer Adsorption ◽

Endothermic Process ◽

Pseudo Second Order ◽

Initial Content ◽

Better Than

The fluoride adsorption on aluminum hydroxide coated rice husk ash material (RHA/Al(OH)3) was demonstrated in this study. The isothermal data indicated that the Langmuir model well described the adsorption system with the maximum monolayer adsorption capacity of 8.2 mg.g-1. The kinetic results revealed that the pseudo-second-order rate model fitted the experiments data better than the pseudo-first-order one. Furthermore, the adsorption of fluoride onto this material may be the chemical adsorption. Thermodynamic parameters (DG and DH) in the range of temperature from 30 to 70oC showed that the adsorption was a spontaneous and an endothermic process. RHA/Al(OH)3 could be used for well-treatment of fluoride contaminated well-water sampling in Ninhhoa district (Khanhhoa province). With the initial content of fluoride of 6.1 mg.L-1 and after 2 hours of treating with the dose of 4.0 ¸ 7.0 g.L-1, the concentration of fluoride in the samples decreased to 0.5 ¸ 1.5 g.L-1, that met acceptable limit of WHO.

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