ADSORPTIVE REMOVAL OF METHYLENE BLUE AND ACID ORANGE 7 BY HEXADECYLTRIMETHYLAMMONIUM BROMIDE MODIFIED RICE HUSK

2016 ◽  
Vol 78 (3-2) ◽  
Author(s):  
Auni Afiqah Kamaru ◽  
Nurul Soraya Ahmad Jani ◽  
Nik Ahmad Nizam Nik Malek ◽  
Nor Suriani Sani
Keyword(s):  
Methylene Blue ◽  
Adsorption Capacity ◽  
Cationic Surfactant ◽  
Rice Husk ◽  
Adsorption Site ◽  
Hexadecyltrimethylammonium Bromide ◽  
Ammonium Compound ◽  
Cationic Dye ◽  
Acid Orange 7 ◽  
Acid Orange

The feasibility of rice husk (RRH) and surfactant modified rice husk (SMRH) to adsorb cationic dye, methylene blue (MB) and acid orange 7 (AO7) from aqueous solution was studied. SMRH was prepared by reacting RRH with different initial concentrations (1.0, 2.5 and 4.0 mM) of cationic surfactant quaternary ammonium compound, hexadecyltrimethylammonium bromide (HDTMABr). RRH and SMRH were characterized using Fourier transform infrared (FTIR) spectroscopy to determine surface functional group and effect of surfactant modification on the structure of RRH. Adsorption studies were performed in a series of batch experiment and effect of initial dye and HDTMABr concentrations on the adsorption capacity of RRH and SMRH were evaluated. The results showed that the removal of MB was higher for RRH compared to SMRH meanwhile AO7 removal was higher for SMRH compared to RRH. Modification of rice husk by cationic surfactant was proven to decrease the adsorption site for MB. On the other hand, the presence of surfactant on SMRH increased the adsorption site and allows more adsorption to occur for AO7. The equilibrium data were better described by Langmuir isotherm with maximum adsorption capacity for MB was 100.0 mg/g and 200.0 mg/g for AO7. In conclusion, the modification of rice husk by HDTMABr decreased the adsorption towards cationic dye but increased the adsorption towards anionic dye

Phase-controlled synthesis of bismuth oxide polymorphs for photocatalytic applications

2018 ◽  
Vol 2 (9) ◽  
pp. 1664-1673 ◽  
Author(s):  
Thangavel Selvamani ◽  
Sambandam Anandan ◽  
Luis Granone ◽  
Detlef W. Bahnemann ◽  
Muthupandian Ashokkumar
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Bismuth Oxide ◽  
Rhodamine B ◽  
Controlled Synthesis ◽  
Acid Orange 7 ◽  
Acid Orange ◽  
Photocatalytic Applications

Bismuth oxide polymorphs (β-Bi2O3 nanoparticles and α-Bi2O3 coral-like morphology) were synthesized and they show an enhanced efficacy for the degradation of rhodamine B and acid orange 7 as compared to that of methylene blue and methyl orange under simulated solar illumination.

Two-fold 2D + 2D → 2D interweaved rhombus (4,4) grid: synthesis, structure, and dye removal properties in darkness and in daylight

2019 ◽  
Vol 48 (3) ◽  
pp. 1095-1107 ◽  
Author(s):  
Meng-Jung Tsai ◽  
Jheng-Hua Luo ◽  
Jing-Yun Wu
Keyword(s):  
Methylene Blue ◽  
Methyl Orange ◽  
Malachite Green ◽  
Dye Removal ◽  
Acid Orange 7 ◽  
High Adsorption ◽  
Acid Orange ◽  
Adsorption Capacities

A rhombus (4,4) grid showing two-fold 2D + 2D → 2D interweaved nets appeared to be a good adsorbent to selectively adsorb and separate anionic methyl orange (MO) and acid orange 7 (AO7) dyes over cationic methylene blue (MB) and malachite green (MG) from water with high adsorption capacities in both darkness and daylight.

scholarly journals Acetone fractionation: a simple and efficient method to improve the performance of lignin for dye pollutant removal

RSC Advances ◽  
2019 ◽  
Vol 9 (61) ◽  
pp. 35895-35903
Author(s):  
Hao Li ◽  
Ze Yuan ◽  
Yuyu Xing ◽  
Jiarong Li ◽  
Jing Fang ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Adsorption Capacity ◽  
Efficient Method ◽  
Pollutant Removal ◽  
Cationic Dye ◽  
Acetone Fractionation

In this work, it was found that the adsorption capacity of lignin to cationic dye (methylene blue, MB) from aqueous solution could be significantly improved by simple acetone fractionation.

ADSORPTION OF ACID ORANGE 7 BY CETYLPYRIDINIUM BROMIDE MODIFIED SUGARCANE BAGASSE

2016 ◽  
Vol 78 (1-2) ◽  
Author(s):  
Nik Ahmad Nizam Nik Malek ◽  
Nurain Mat Sihat ◽  
Mahmud A. S. Khalifa ◽  
Auni Afiqah Kamaru ◽  
Nor Suriani Sani
Keyword(s):  
Aqueous Solution ◽  
Adsorption Capacity ◽  
Sugarcane Bagasse ◽  
Freundlich Isotherm ◽  
Isotherm Models ◽  
Acid Orange 7 ◽  
Cetylpyridinium Bromide ◽  
Batch Mode ◽  
Acid Orange ◽  
Adsorption Data

In the present study, the adsorption of acid orange 7 (AO7) dye from aqueous solution by sugarcane bagasse (SB) and cetylpyridinium bromide (CPBr) modified sugarcane bagasse (SBC) was examined. SBC was prepared by reacting SB with different concentrations (0.1, 1.0 and 4.0 mM) of cationic surfactant, CPBr. The SB and SBC were characterized using Fourier transform infrared (FTIR) spectroscopy. The adsorption experiments were carried out in a batch mode. The effect of initial AO7 concentrations (5-1000 mg/L), initial CPBr concentrations and pH of AO7 solution (2-9) on the adsorption capacity of SB and SBC were investigated. The experimental adsorption data were analyzed using Langmuir and Freundlich isotherm models. The adsorption of AO7 onto SB and SBC followed Freundlich and Langmuir isotherm models, respectively. The maximum uptake of AO7 was obtained by SBC4.0 (SB treated with 4.0 mMCPBr) with the adsorption capacity of 144.928 mg/g. The highest AO7 removal was found to be at pH 2 and 7 for SB and SBC, respectively. As a conclusion, sugarcane bagasse modified with CPBr can become an alternative adsorbent for the removal of anionic compounds in aqueous solution.

Sorption of Methylene Blue and Acid Orange 7 onto Ananas comosus Peels and Leaves Based Activated Carbon

2013 ◽  
Vol 330 ◽  
pp. 112-116 ◽  
Author(s):  
Nabilah A. Lutpi ◽  
N. Najihah Jamil ◽  
C.K. Kairulazam C.K. Abdullah ◽  
Yee Shian Wong ◽  
Soon An Ong ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Activated Carbon ◽  
Contact Time ◽  
Time Effect ◽  
Ananas Comosus ◽  
Acid Orange 7 ◽  
Initial Concentration ◽  
Adsorbent Dosage ◽  
Acid Orange ◽  
Percentage Removal

The adsorption of Methylene Blue (MB) and Acid Orange 7 (AO7) dye onto Ananas Comosus Mixed Peels and Leaves (ACMPL) were carried out by conducting four different parameters such as initial concentration, pH, dosage of adsorbent, and contact time. Effect of initial concentration for both dyes showed that higher initial concentration would take longer contact time to attain equilibrium due to higher amount of adsorbate molecules. The effect of pH showed highest percentage removal for MB is at pH 9 which is 95.81%. Meanwhile for AO7 the highest percentage removal is 31.06% at pH 3. The percentage removal of MB had reached the equilibrium at dosage 0.5g while AO7 keep increasing with the increment of adsorbent dosage. The percentage removal of MB and AO7 had increased until hour 2.5 which was from 72.5% to 86.93% and 19.441% to 36.89% respectively and reached equilibrium at 3 hour contact time.

scholarly journals CuAl LDH/Rice Husk Biochar Composite for Enhanced Adsorptive Removal of Cationic Dye from Aqueous Solution

2020 ◽  
Vol 15 (2) ◽  
pp. 525-537 ◽  
Author(s):  
Neza Rahayu Palapa ◽  
Tarmizi Taher ◽  
Bakri Rio Rahayu ◽  
Risfidian Mohadi ◽  
Addy Rachmat ◽  
...  
Keyword(s):  
Adsorption Capacity ◽  
Surface Area ◽  
Malachite Green ◽  
Rice Husk ◽  
Low Cost ◽  
Bet Surface Area ◽  
Maximum Adsorption Capacity ◽  
Cationic Dye ◽  
X Ray ◽  
Adsorptive Removal

The preparation of CuAl LDH and biochar (BC) composite derived from rice husk and its application as a low-cost adsorbent for enhanced adsorptive removal of malachite green has been studied. The composite was prepared by a one-step coprecipitation method and characterized by X-ray Diffraction (XRD), Fourier Transform Infra Red (FTIR), Brunauer-Emmett-Teller (BET), and Scanning Electron Microscopy - Energy Dispersive X-ray (SEM−EDX). The result indicated that CuAl LDH was successfully incorporated with the biochar that evidenced by the broadening of XRD peak at 2θ = 24° and the appearance of a new peak at 1095 cm−1 on the FTIR spectra. The BET surface area analysis revealed that CuAl/BC composite exhibited a larger surface area (200.9 m2/g) that the original CuAl LDH (46.2 m2/g). Surface morphological changes also confirmed by SEM image, which showed more aggregated particles. The result of the adsorption study indicated the composite material was efficient in removing malachite green with Langmuir maximum adsorption capacity of CuAl/BC reaching 470.96 mg/g, which is higher than the original CuAl LDH 59.523 mg/g. The thermodynamic analysis suggested that the adsorption of malachite green occurs spontaneously (ΔG < 0 at all tested temperature) and endothermic nature. Moreover, the CuAl/BC composite showed strong potential as a low-cost adsorbent for cationic dye removal since it showed not only a high adsorption capacity but also good reusability. Copyright © 2020 BCREC Group. All rights reserved

scholarly journals Removal of Acid Orange 7 from Aqueous Solution by Metal-Organic Frameworks

Crystals ◽  
2018 ◽  
Vol 9 (1) ◽  
pp. 17 ◽  
Author(s):  
Sungwon Yoon ◽  
James Calvo ◽  
Monica So
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Bonding ◽  
Adsorption Capacity ◽  
Metal Clusters ◽  
Metal Organic Frameworks ◽  
Acid Orange 7 ◽  
Acid Orange ◽  
Zeta Potentials ◽  
Metal Organic ◽  
Capacity Data

We investigated the removal of a harmful anionic dye, acid orange 7 (AO7), from aqueous solution using metal-organic frameworks (MOFs). We prepared four different MOFs (ZIF-8, ZIF-67, UiO-66, UiO-66-NH2) by solvothermal reactions and then tested their adsorption of AO7. Infrared spectra and adsorption capacity data confirmed the removal of AO7 from aqueous solution. The factors we investigated affecting adsorption capacity include variation of the organic linkers and metal clusters of the MOFs. Our results suggest that the hydrogen bonding, π–π interactions, and zeta potentials facilitate the removal of AO7 from water. Of the four MOFs examined, ZIF-67 exhibited the highest adsorption capacity of AO7 and can be regenerated easily.

Bacterial Decolorization of Acid Orange 7 in the Presence of Ionic and Non-Ionic Surfactants

2007 ◽  
Vol 62 (1-2) ◽  
pp. 87-92 ◽  
Author(s):  
Tatyana Avramova ◽  
Lilyana Stefanova ◽  
Blaga Angelova ◽  
Sava Mutafov
Keyword(s):  
Cationic Surfactant ◽  
Anionic Surfactant ◽  
Rhodococcus Erythropolis ◽  
Reaction Medium ◽  
Alcaligenes Faecalis ◽  
Ionic Surfactant ◽  
Acid Orange 7 ◽  
Prolonged Incubation ◽  
Acid Orange ◽  
Triton X

The effects of the non-ionic surfactant Triton® X-100, the cationic surfactant cetyltrimethylammonium bromide (CTAB) and the anionic surfactant sodium N-lauroyl sarcosinate (SLS) on the decolorization of the reaction medium containing the monoazo dye Acid Orange 7 (AO7) by Alcaligenes faecalis and Rhodococcus erythropolis were studied. It was found that the surfactants influenced in different ways the rate of decolorization. At all concentrations tested the non-ionic surfactant Triton X-100 decreased the decolorization rate of R. erythropolis. At concentrations above the critical micelle concentration (CMC) Triton X-100 upset the usually observed exponential decay of the dye with A. faecalis due probably to the existence of an outer membrane in this organism. In concentrations above the CMC the anionic surfactant SLS inhibited the decolorization and, at prolonged incubation, caused partial release of the bound dye. The cationic surfactant CTAB in concentrations above and below the CMC accelerated drastically the binding of AO7 to the cells causing a rapid staining of the biomass and complete decolorization of the reaction medium. An attempt was made for explanation of the observed differences by the negative electrostatic charge of the living bacterial cell.

scholarly journals Co-adsorption of an anionic dye in the presence of a cationic dye and a heavy metal ion by graphene oxide and photoreduced graphene oxide

RSC Advances ◽  
2019 ◽  
Vol 9 (10) ◽  
pp. 5313-5324 ◽  
Author(s):  
Xiaorong Zhang ◽  
Chengbing Qin ◽  
Yani Gong ◽  
Yunrui Song ◽  
Guofeng Zhang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Methylene Blue ◽  
Graphene Oxide ◽  
Adsorption Capacity ◽  
Metal Ion ◽  
Co Adsorption ◽  
Heavy Metal Ion ◽  
Orange Ii ◽  
Cationic Dye ◽  
Anionic Dye

The adsorption capacity of graphene oxide (GO) for orange II (OII) can be remarkably enhanced in the presence of methylene blue (MB) and Pb2+.

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