scholarly journals Triamine-bearing activated rice husk ash as an advanced functional material for nitrate removal from aqueous solution

2018 ◽  
Vol 79 (5) ◽  
pp. 850-856 ◽  
Author(s):  
Phuoc Toan Phan ◽  
Trung Thanh Nguyen ◽  
Nhat Huy Nguyen ◽  
Surapol Padungthon
Keyword(s):  
Adsorption Capacity ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Strong Interactions ◽  
Material Structure ◽  
Functional Material ◽  
Simple Method ◽  
X Ray ◽  
Nitrate Adsorption ◽  
Advanced Functional Material

Abstract In this study, we proposed a simple method for preparing triamine-bearing activated rice husk ash material (TRI-ARHA) as an advanced functional material with high nitrate adsorption capacity and durability. The novel TRI-ARHA was generated via a post-synthesis grafting method and modified by acidification to form ammonium moiety. TRI-ARHA was then characterized by using thermogravimetric analysis, Fourier transform infrared spectroscopy, X-ray diffraction, scanning electron microscopy (SEM), energy-dispersive X-ray spectroscopy and SEM-mapping. The TRI-ARHA had high nitrate adsorption capacity of 163.4 mgNO3−/g, which was 2.06 times higher than that of a commercial anion exchange resin (Akualite A420) due to strong interactions of Si, C, and N in the material structure. This functional material with good durability after 10 cycles could be very promising for adsorption of other anions (e.g. sulfate and phosphate) in water and wastewater treatment.

scholarly journals Kajian Termodinamika Adsorpsi Hibrida Merkapto-Silika dari Abu Sekam Padi Terhadap Ion Co(II)

2013 ◽  
Vol 3 (2) ◽  
Author(s):  
Dwi Rasy Mujiyanti ◽  
Noer Komari ◽  
Ningtyas Indah Sari
Keyword(s):  
Organic Compound ◽  
Adsorption Capacity ◽  
Silica Gel ◽  
Rice Husk ◽  
Adsorption Energy ◽  
Rice Husk Ash ◽  
X Ray Diffraction ◽  
Initial Concentration ◽  
X Ray ◽  
Silica Hybrid

AbstrakTelah dilakukan penelitian tentang kajian termodinamika adsorpsi hibrida merkapto-silika dari abu sekam padi terhadap ion Co(II). Penelitian ini bertujuan untuk menentukan kapasitas dan energi adsorpsi hibrida merkapto-silika (HMS) dan silika gel (SG) terhadap ion Co(II). Pada penelitian ini, silika gel dibuat menggunakan natrium silikat dari abu sekam padi. Selanjutnya, senyawa organik 3-(trimetoksisilil)-1-propantiol diimobilisasi pada SG menghasilkan HMS. Adsorben dikarakterisasi menggunakan difraktometer sinar-X dan spektrofotometer FTIR. Larutan Co(II) kemudian dikontakkan dengan SG dan HMS pada variasi pH, waktu, dan konsentrasi awal. Hasil penelitian kapasitas adsorpsi yang diperoleh HMS hampir tiga kali lebih besar dibandingkan dengan SG, dengan besarnya kapasitas adsorpsi masing-masing yaitu 250,00 mg/g dan 90,91 mg/g. Sedangkan energi adsorpsi yang diperoleh adalah 51,69 KJ/mol untuk SG, dan 23,65 KJ/mol untuk HMS.Kata kunci : sekam padi, hibrida merkapto-silika, adsorpsi, ion Co(II)AbstractA research on the study of the thermodynamics of adsorption mercapto-silica hybrid from rice husk ash to the ions Co (II) has been done. This study aims to determine capacity and energy adsorption of hybrid mercapto-silica (HMS) and silica gel (SG) to the ions Co (II) . In this study, silica gel was made using sodium silicate from rice husk ash. Furthermore, the organic compound 3-(trimethoxysilil )-1-prophantiol immobilized on SG to HMS produced. Adsorbents were characterized using X-ray diffraction and FTIR spectrophotometer. Solution of Co (II) is then contacted with the SG and HMS at the variation of pH, time , and initial concentration. The results obtained by HMS adsorption capacity is almost three times larger than the SG, the magnitude of adsorption capacity of each is 250.00 mg / g and 90.91 mg / g . While the adsorption energy obtained is 51.69 KJ / mol for SG , and 23.65 KJ / mol for HMS.Keywords : rice husk, mercapto-silica hybrid , adsorption , ion Co(II)

Development of Ternary Concrete Utilizing Agricultural Waste Material

2022 ◽  
Author(s):  
Sunita Kumari ◽  
Dhirendra Singhal ◽  
Rinku Walia ◽  
Ajay Rathee
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Agricultural Waste ◽  
Xrd Analysis ◽  
Sem Analysis ◽  
X Ray Diffraction ◽  
X Ray ◽  
Concrete Mix ◽  
Maize Cob

Abstract The present project proposes to utilize rice husk and maize cob husk ash in the cement to mitigate the adverse impact of cement on environment and to enhance the disposal of waste in a sustainable manner. Ternary concrete / MR concrete was prepared by using rise husk and maize cob ash with cement. For the present project, five concrete mixes MR-0 (Control mix), MR-1 (Rice husk ash 10% and MR-2.5%), MR-2 (Rice husk ash 10% and MR-5%), MR-3 (Rice husk ash 10% and MR-2.5%), MR-4 (Rice husk ash 10% and MR-2.5%) were prepared. M35 concrete mix was designed as per IS 10262:2009 for low slump values 0-25mm. The purpose is to find the optimum replacement level of cement in M35 grade ternary concrete for I – Shaped paver blocks.In order to study the effects of these additions, micro-structural and structural properties test of concretes have been conducted. The crystalline properties of control mix and modified concrete are analyzed by Fourier Transform Infrared Spectroscope (FTIR), Scanning Electron Microscopy (SEM), and X-Ray Diffraction (XRD). The results indicated that 10% Rice husk ash and 5% maize cob ash replaced with cement produce a desirable quality of ternary concrete mix having good compressive strength. The results of SEM analysis indicated that the morphology of both concrete were different, showing porous structure at 7 days age and become unsymmetrical with the addition of ashes. After 28 day age, the control mix contained more quantity of ettringite and became denser than ternary concrete. XRD analysis revealed the presence of portlandite in large quantity in controlled mix concrete while MR concrete had the partially hydrated particle of alite.

scholarly journals CHARACTERISTIC OF XONOTLITE SYNTHESIZED BY HYDROTHERMAL REACTION USING RICE HUSK ASH AND ITS APPLICATION TO ABSORB CHROME (III) SOLUTION

2021 ◽  
Vol 55 (6) ◽  
Author(s):  
Trung Kien Pham ◽  
Tran Ngo Quan
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Hydrothermal Reaction ◽  
Mekong Delta ◽  
Molar Ratio ◽  
X Ray ◽  
Vis Spectroscopy ◽  
Xrf Scanning ◽  
Before And After ◽  
Chrome Iii

In this paper, we report on synthesizing xonotlite, calcium silicate hydrate (CSH), via a hydrothermal reaction using rice husk from the Mekong Delta, Vietnam. The rice husks were burnt at 1000 °C for 3 h. Grey rice husk ash was collected, then mixed with Ca(OH)2 at a Ca/Si molar ratio of 1 : 1. This was followed by a hydrothermal reaction at 180 °C for 24 h and 48 h to obtain the xonotlite mineral. Before and after adsorption, 3-mm xonotlite pellets were thoroughly characterized using X-ray diffractometry (XRD), X-ray fluorescence (XRF), scanning electron microscopy (SEM) and ultraviolet-visible (UV-VIS) spectroscopy. This material has potential application in chromium(III) removal during a chrome-plating process. The adsorption efficiency of the 3-mm pellet samples reached more than 76 % after 12 h.

Comparison between Rice Husk Ash and Commercial Silica as Filler in Polymeric Composites

2016 ◽  
Vol 869 ◽  
pp. 209-214 ◽  
Author(s):  
Iara Janaína Fernandes ◽  
Daiane Calheiro ◽  
Emanuele Caroline Araújo dos Santos ◽  
Roxane Oliveira ◽  
Tatiana Louise Avila de Campos Rocha ◽  
...  
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Polymeric Materials ◽  
Fluidized Bed Reactor ◽  
Specific Weight ◽  
High Energy ◽  
Loss On Ignition ◽  
X Ray Diffraction ◽  
X Ray ◽  
Different Sources

The use of rice husk ash (RHA) as filler in polymeric materials has been studied in different polymers. Research reported that RHA may successfully replace silica. The silica production process using ore demands high energy input and produces considerable amounts of waste. Therefore, the replacement of silica by RHA may be economically and environmentally advantageous, reducing environmental impact and adding value to a waste material. In this context, this study characterizes and compares RHA of different sources (moving grate and fluidized bed reactor) with commercially available silicas to assess performance as filler in polymeric materials. Samples were characterized by X-ray fluorescence, loss on ignition, X-ray diffraction, grain size, specific surface area, specific weight, and scanning electron microscopy. The results show that RHA may be used as a filler in several polymeric materials.

scholarly journals Bacterial Compatibility/Toxicity of Biogenic Silica (b-SiO2) Nanoparticles Synthesized from Biomass Rice Husk Ash

Nanomaterials ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 1440 ◽  
Author(s):  
Sanjeev K. Sharma ◽  
Ashish R. Sharma ◽  
Sudheer D. V. N. Pamidimarri ◽  
Jyotshana Gaur ◽  
Beer Pal Singh ◽  
...  
Keyword(s):  
Rice Husk ◽  
Photoelectron Spectroscopy ◽  
Biogenic Silica ◽  
Rice Husk Ash ◽  
Sio2 Nanoparticles ◽  
High Porosity ◽  
Xps Spectra ◽  
X Ray ◽  
Xrd Patterns ◽  
Sio2 Nanopowder

Biogenic silica (b-SiO2) nanopowders from rice husk ash (RHA) were prepared by chemical method and their bacterial compatibility/toxicity was analyzed. The X-ray diffractometry (XRD) patterns of the b-SiO2 nanopowders indicated an amorphous feature due to the absence of any sharp peaks. Micrographs of the b-SiO2 revealed that sticky RHA synthesized SiO2 nanopowder (S1) had clustered spherical nanoparticles (70 nm diameter), while b-SiO2 nanopowder synthesized from red RHA (S2) and b-SiO2 nanopowder synthesized from brown RHA (S3) were purely spherical (20 nm and 10 nm diameter, respectively). Compared to the S1 (11.36 m2g−1) and S2 (234.93 m2g−1) nanopowders, the S3 nanopowders showed the highest surface area (280.16 m2g−1) due to the small particle size and high porosity. The core level of the X-ray photoelectron spectroscopy (XPS) spectra showed that Si was constituted by two components, Si 2p (102.2 eV) and Si 2s (153.8 eV), while Oxygen 1s was observed at 531.8 eV, confirming the formation of SiO2. The anti-bacterial activity of the b-SiO2 nanopowders was investigated using both gram-positive (Escherichia coli) and gram-negative (Staphylococcus aureus) microorganisms. Compared to S2 and S3 silica nanopowders, S1 demonstrated enhanced antibacterial activity. This study signifies the medical, biomedical, clinical, and biological importance and application of RHA-mediated synthesized b-SiO2.

scholarly journals Preparation and characterization of rice husk ash (RHA)-TiO2 / ZnO composites and its application in treating effluents from textile industries

2013 ◽  
Vol 47 (4) ◽  
pp. 445-448 ◽  
Author(s):  
MH Kabir ◽  
MF Kabir ◽  
F Nigar ◽  
S Ahmed ◽  
AI Mustafa ◽  
...  
Keyword(s):  
Composite Materials ◽  
Rice Husk ◽  
Rice Husk Ash ◽  
Textile Dye ◽  
X Ray ◽  
Textile Dye Effluent ◽  
Degradation Reaction ◽  
D Values ◽  
Sun Light

Photocatalytic composite materials incorporating the photocatalysts (TiO2, ZnO) with rice husk ash (RHA) have been developed to investigate the photodegradation of real textile dye effluent. The structural characterization of the composite materials was performed using XRD (X-Ray Diffractometer). The characteristic XRD peaks together with the 2? values for both TiO2 and ZnO were in excellent agreement with the standard JCPDS d-values. The efficacy of these composites was examined through the degradation of a textile dye, collected from a local dye house. The sun light was used as the source of illumination for the preceding degradation reaction. Bangladesh J. Sci. Ind. Res. 47(4), 445-448, 2012 DOI: http://dx.doi.org/10.3329/bjsir.v47i4.14075

scholarly journals Solidification and Leachability of Cr (VI) in Rice Husk Ash-Blended Cement

2011 ◽  
Vol 2011 ◽  
pp. 1-6 ◽  
Author(s):  
Neeraj Jain
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Setting Time ◽  
Blended Cement ◽  
X Ray Diffraction ◽  
Retention Capacity ◽  
Allowable Limit ◽  
X Ray ◽  
Curing Period ◽  
Leaching Procedure

Investigations carried out to study the effect of Cr (VI) (1000–3000 mg/l) on solidification and hydration behavior of Ordinary Portland cement (OPC) and rice husk ash (RHA) blended (10%, 20%, and 30%) cement show that addition of RHA accelerates final setting as compared to control samples (OPC) and retardation in setting time has been observed on increase in rice husk ash concentration (10%–30%). Solidification studies show that the compressive strength of controls and rice husk ash blended samples increases with increase in the curing period and maximum strength was observed with 20% RHA blended samples. With the increase in Cr (VI) concentrations, the strength of OPC and RHA blended samples decreases as compared to controls (without chromium). The results of Toxicity Characteristics Leaching Procedure (TCLP) test, (pH≅3), show that the retention capacity of OPC and RHA blended samples was in the range of 92% to 99% and the leached Cr (VI) concentration was under the allowable limit (5 mg/l) of U.S. EPA. The chemistry of influence of Cr (VI) on hydration of cement was examined by X-ray diffraction which shows the formation of various crystalline phases during solidification in rice hush ash blended cement.

Variables Involved in the Planting of Rice in the Rice Husk

2012 ◽  
Vol 517 ◽  
pp. 430-436
Author(s):  
J.L. Akasaki ◽  
E.J. Silva ◽  
L.C. Sousa ◽  
J.L.P. Melges ◽  
M.M. Tashima ◽  
...  
Keyword(s):  
Rice Husk ◽  
Large Scale ◽  
Rice Husk Ash ◽  
Scale Production ◽  
X Ray Diffraction ◽  
X Ray ◽  
Large Scale Production ◽  
Pozzolanic Materials ◽  
Different Strains ◽  
Different Origins

Rice production in Brazil in 2010 was approximately 12,2 million tons, and to reach that amount several planting techniques were used with different strains of rice in different rice-growing areas. Since Rice Husk Ash (RHA) is the pozzolan of vegetable origin most studied by researchers working in the area of pozzolanic materials, the present paper evaluates the influence that the form of planting, the climate, the soil, the strain of rice and the origin/amount of nitrogen-based fertilizers used in rice cultivation has on the chemical composition and crystallographic properties of RHA. The results obtained in this paper, confirm the importance of carrying out routine chemical analysis and X-Ray diffraction to maintain the quality control of the CCAs produced, because in situations of large-scale production, husks of different origins may be used.

scholarly journals Effects of Rice Husk Ash–Magnesium Oxide Addition on Wear Behavior of Aluminum Alloy Matrix Hybrid Composites

2018 ◽  
Vol 25 (4) ◽  
pp. 15-22
Author(s):  
Abbas Y. Awad ◽  
Mohammed N. Ibrahim ◽  
Mohamed K. Hussein
Keyword(s):  
Aluminum Alloy ◽  
Wear Rate ◽  
Apparent Density ◽  
Rice Husk ◽  
Applied Load ◽  
Rice Husk Ash ◽  
Hybrid Composites ◽  
Wear Behavior ◽  
X Ray Diffraction ◽  
X Ray

A336.0 aluminum alloy used to fabricate hybrid composites using rice husk ash (RHA) and MgO particles as reinforcement. The influence of the particles on the wear behavior of A336.0 aluminum alloy as a matrix that reinforced with MgO and RHA was investigated. Firstly, the rice husk burned at 700°C and then heat treated at 1100°C for 2 hrs. The ash characterized by X-ray florescence and X-ray diffraction. Less than 53 and 125 micron are the particle sizes of MgO and RHA respectively. The hybrid composites manufactured using stir casting method in two steps. A336.0 aluminum alloy reinforced with 4:0, 3:1, 2:2, 1:3 and 0:4 of RHA: MgO with 10 wt% total reinforcement phase. Optical microscope and X-ray diffraction were used to characterize the prepared hybrid composites. Dry sliding wear, hardness, apparent density, percentage of porosity and coefficient of friction were examined. Results indicated that porosity, apparent density and hardness enhanced with increasing MgO, while increasing wt% of RHA decreased the apparent density. Results indicated that with inceasing the applied load the wear rate of the composites was enhanced. Coefficient of friction varies inversely with applied load and wt% of RHA. Hardness increased with increasing RHA while the friction coefficient and the wear rate decreased. The minimum wear rates were at 10% RHA and Al-alloy-(RHA-MgO) [3:1] composites, while the minimum friction coefficients were at 10% RHA composites.

scholarly journals Adsorption of Flagyl on Prepared Ash from Rice Husk

2021 ◽  
Vol 22 (4) ◽  
pp. 11-17
Author(s):  
Haider Abbas ◽  
Ammar S. Abbas
Keyword(s):  
Rice Husk ◽  
Rice Husk Ash ◽  
Primary Source ◽  
Alternative Methods ◽  
X Ray Diffraction ◽  
X Ray ◽  
Adsorption Data ◽  
Pseudo Second Order ◽  
Husk Rice ◽  
Increasing Temperature

In recent years, it has been evident that searching for alternative methods with low-price and eco-friendly features that produce high-quality adsorbents is in high demand. In the present work, Rice husk from Iraqi rice named (Amber) had been used as the primary source to produce rice husk ash (RHA) for the removal of the antibiotic metronidazole (Flagyl) from water. After optimum drying of rice husk, rice husk ash (RHA) was obtained at 600 °C using an electric oven. RHA has been investigated for properties using X-ray diffraction (XRD), porosity, and surface area (SA). The experimental work adsorption data were optimized to evaluate Langmuir and Freundlich constants. The thermodynamic parameters likely a change in Gipp's energy (ΔG), enthalpy (ΔH), and entropy (ΔS). The impacts of increasing temperature on adsorption capacity were investigated, and the results indicate that the pseudo-second-order kinetics model could be presented the dynamic adsorption data that it has. The resultant values for the heat of adsorption and the free energy indicated that adsorption of Flagyl is preferred at low temperatures.

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