Paraquat adsorption on porous materials synthesized from rice husk silica

2013 ◽  
Vol 68 (4) ◽  
pp. 863-869 ◽  
Author(s):  
Wina Rongchapo ◽  
Onsulang Sophiphun ◽  
Kamolwan Rintramee ◽  
Sanchai Prayoonpokarach ◽  
Jatuporn Wittayakun
Keyword(s):  
Porous Materials ◽  
Rice Husk ◽  
Langmuir Model ◽  
Blue Dye ◽  
Maximum Adsorption Capacity ◽  
Rice Husk Silica ◽  
Zeolite Nay ◽  
Commercial Grade ◽  
Efficient Adsorbent ◽  
Mcm 41

The goal of this work was to utilize rice husk silica (RHS) and porous materials synthesized with RHS, including mesoporous material (MCM-41) and microporous materials (zeolite NaY and NaBEA), for adsorption of herbicide paraquat. The adsorption occurred although cation exchange and the capacity decreased in the following order: NaY > NaBEA > MCM-41 > RHS, consistent with the amount of Al. The adsorption on all adsorbents fitted well with the Langmuir model and the maximum adsorption capacity of 185.2 mg/g-adsorbent was obtained on NaY. In addition, blue dye in commercial grade paraquat did not interfere with paraquat adsorption. Although MCM-41 was the most efficient adsorbent for the blue dye, RHS was favorable in terms of production cost. A mixture of NaY and RHS is recommended for simultaneous adsorption of paraquat and blue dye.

scholarly journals Characterization and catalytic performance of potassium loaded on rice husk silica and zeolite nay for transesterification of jatropha seed oil

Química Nova ◽  
2013 ◽  
Vol 36 (8) ◽  
pp. 1116-1120 ◽  
Author(s):  
Kathrina D. Montalbo ◽  
Rizalinda L. de Leon ◽  
Onsulang Sophiphun ◽  
Saowanee Manadee ◽  
Sanchai Prayoonpokarach ◽  
...  
Keyword(s):  
Rice Husk ◽  
Seed Oil ◽  
Catalytic Performance ◽  
Rice Husk Silica ◽  
Zeolite Nay ◽  
Jatropha Seed

Influence of CTAB molar ratio in tuning the texture of rice husk silica into MCM 41 and SBA-16

2013 ◽  
Vol 109 ◽  
pp. 70-73 ◽  
Author(s):  
N.K. Renuka ◽  
A.K. Praveen ◽  
K. Anas
Keyword(s):  
Rice Husk ◽  
Molar Ratio ◽  
Rice Husk Silica ◽  
Mcm 41

Arsenic Adsorption by Fe Loaded on RH-MCM-41 Synthesized from Rice Husk Silica

2012 ◽  
Vol 138 (1) ◽  
pp. 119-128 ◽  
Author(s):  
Kitirote Wantala ◽  
Suthipong Sthiannopkao ◽  
Bang-orn Srinameb ◽  
Nurak Grisdanurak ◽  
Kyoung-Woong Kim ◽  
...  
Keyword(s):  
Rice Husk ◽  
Arsenic Adsorption ◽  
Rice Husk Silica ◽  
Mcm 41

Synthesis and characterization of zeolite NaY from rice husk silica

2008 ◽  
Vol 25 (4) ◽  
pp. 861-864 ◽  
Author(s):  
Jatuporn Wittayakun ◽  
Pongtanawat Khemthong ◽  
Sanchai Prayoonpokarach
Keyword(s):  
Rice Husk ◽  
Synthesis And Characterization ◽  
Rice Husk Silica ◽  
Zeolite Nay

Synthesis and characterization of Fe-MCM-41 from rice husk silica by hydrothermal technique for arsenate adsorption

2010 ◽  
Vol 32 (4) ◽  
pp. 261-266 ◽  
Author(s):  
Kitirote Wantala ◽  
Suthipong Sthiannopkao ◽  
Bang-orn Srinameb ◽  
Nurak Grisdanurak ◽  
Kyoung Woong Kim
Keyword(s):  
Rice Husk ◽  
Synthesis And Characterization ◽  
Hydrothermal Technique ◽  
Rice Husk Silica ◽  
Arsenate Adsorption ◽  
Mcm 41

Adsorption of the Blue Dye Reactive Remazol RN in Cellulosic Materials

2014 ◽  
Vol 775-776 ◽  
pp. 749-754
Author(s):  
Mirna Sales Loiola Rosa ◽  
Marcos Pereira Silva ◽  
Alan Icaro Morais ◽  
Maria Rita de Morais Chaves Santos ◽  
Edson Cavalcanti Silva Filho ◽  
...  
Keyword(s):  
Low Cost ◽  
Langmuir Model ◽  
Blue Dye ◽  
Maximum Adsorption Capacity ◽  
Order Model ◽  
Textile Waste ◽  
Pseudo Second Order ◽  
Filter Papers ◽  
Best Fit ◽  
The Ideal

The disposal of textile waste in water bodies is exacerbating environmental problems, which led scientists to seek natural materials to develop more sustainable ways. Searching for low cost materials was used to remove the dye in two cellulosic sources (filter papers of different brands). The papers were characterized by XRD which confirmed crystallographic profile similar to cellulose. With the aim of optimizing the best conditions, various tests were performed, where the ideal time was 180 minutes for the paper 1 and 240 minutes for the second paper, both by adjusting the pseudo second-order model. The other parameters studied was the pH, adsorbate-adsorbent systems which have maximum adsorption capacity of 2.76 mg / g at pH 2.02 and 2 mg / g at pH 11 for the paper 1 and 10.57 mg / g pH 4 and 2 mg / g at pH 11 for the paper 2. Both adsorbents had the best fit to the Langmuir model in pHs 2 and 11 at the temperature of 298 K.

Adsorption of crude and engine oils from water using raw rice husk

2013 ◽  
Vol 69 (5) ◽  
pp. 947-952 ◽  
Author(s):  
Zahra Razavi ◽  
Nourollah Mirghaffari ◽  
Behzad Rezaei
Keyword(s):  
Rice Husk ◽  
Inductively Coupled Plasma ◽  
Low Cost ◽  
Freundlich Isotherm ◽  
Langmuir Model ◽  
Engine Oil ◽  
Maximum Adsorption Capacity ◽  
Aqueous Environment ◽  
Engine Oils ◽  
Inductively Coupled

The raw rice husk (RRH) was used as a low cost adsorbent to remove three oil compounds with different viscosities (crude oil, engine oil and spent engine oil) from an aqueous environment. Some of the sorbent specifications were characterized using a CHNSO analyzer, Fourier transform infrared, scanning electron microscope and inductively coupled plasma spectroscopy. With decreasing RRH particles size, the oil adsorption percentage was reduced for crude, spent and engine oils from 50 to 30%, 65 to 20% and 70 to 0.01%, respectively. This was probably due to damage of the microcavities. The removal percentage by sorbent at optimized conditions was 88, 80 and 55% for engine, spent and crude oils, respectively, corresponding to their descending viscosity. The adsorption of crude and spent oils on rice husk followed the Freundlich isotherm model, while the adsorption of engine oil was fitted by the Langmuir model. The maximum adsorption capacity (qmax), calculated from the Langmuir model for the adsorption of engine oil on RRH, was 1,250 mg/g.

scholarly journals UTILIZATION OF RICE HUSK AS RAW MATERIAL IN SYNTHESIS OF MESOPOROUS SILICATES MCM-41

2011 ◽  
Vol 11 (3) ◽  
pp. 279-284 ◽  
Author(s):  
Suyanta Suyanta ◽  
Agus Kuncaka
Keyword(s):  
Ftir Spectroscopy ◽  
Sodium Silicate ◽  
Rice Husk ◽  
Hydrothermal Process ◽  
X Ray Diffraction ◽  
Rice Husk Silica ◽  
X Ray ◽  
Silica Source ◽  
Significant Difference ◽  
Mcm 41

The research about synthesis and characterization of MCM-41 from rice husk has been done. Silica (SiO2) was extracted from rice husk by refluxing with 3M hydrochloric solution at 80 °C for 3 h. The acid-leached rice husk was filtered, washed, dried and calcined at 650 °C for 6 h lead the rough powder of rice husk silica with light brown in color. Characterization was carried out by X-ray diffraction (XRD) and FTIR spectroscopy method. Rice husk silica was dissolved into the sodium hydroxide solution leading to the solution of sodium silicate, and used as silica source for the synthesis of MCM-41. MCM-41 was synthesized by hydrothermal process to the mixture prepared from 29 g of distilled water, 8.67 g of cetyltrimethyl ammonium bromide (CTMAB), 9.31 g of sodium silicate solution, and amount mL of 1 M H2SO4. Hydrothermal process was carried out at 100 °C in a teflon-lined stainless steel autoclave heated in the oven for 36 h. The solid phase was filtered, then washed with deionised water, and dried in the oven at 100 °C for 2 h. The surfactant CTMAB was removed by calcination at 550 °C for 10 h with heating rate 2 °C/min. The as-synthesized and calcined crystals were characterized by using FTIR spectroscopy, X-ray diffraction and N2 physisorption methods. In order to investigate the effect of silica source, the same procedure was carried out by using pure sodium silicate as silica source. It was concluded that silica extracted from rice husk can be used as raw materials in the synthesis of MCM-41, there is no significant difference in crystallinity and pore properties when was compared to material produced from commercial sodium silicate.

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