Journal ArticleDOI
Highly Efficient Adsorption of Anionic Dyes from Aqueous Solutions Using Sawdust Modified by Cationic Surfactant of Cetyltrimethylammonium Bromide
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In this article, the adsorption behavior of Congo Red (CR) dye from aqueous systems onto sawdust modified by cetyltrimethylammonium bromide, CH3(CH2)15N(CH3)3Br (CTAB) was attempted.Abstract:
In the present study, the adsorption behavior of Congo Red (CR) dye from aqueous systems onto sawdust modified by cetyltrimethylammonium bromide, CH3(CH2)15N(CH3)3Br (CTAB) was attempted. Adsorption experiments were carried out using both batch and column modes under various operating conditions. The effects of some important parameters such as solution pH, adsorbent dosage, initial dye concentration and contact time were investigated. Treatment of the equilibrium data obtained in batch experiments was carried out using Langmuir and Freundlich isotherm equations. Based on the isotherm analysis, it was found that the adsorption of CR dye onto SD fits well to the Langmuir model and the adsorption pattern on CTAB modified sawdust (CTAB/SD) followed the Freundlich isotherm which is indicative of heterogeneity of the adsorption sites on the surfactant-modified sawdust. The maximum adsorption capacity of SD and CTAB/SD were found to be 5.2 and 9.1 mg g−1, respectively, according to the Langmuir model. However, much higher differences in sorption capacities were observed for CTAB/SD and SD in the column system (66.73 mg g−1). In order to find out the possibility of the exhausted column for frequent use, a regeneration study was also carried out. It was found that the dye uploaded column can be easily regenerated with a high performance using ethanol as the washing solution.read more
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Preparation of Three-Dimensional Graphene Oxide–Polyethylenimine Porous Materials as Dye and Gas Adsorbents
TL;DR: The as-prepared 3D porous materials show an excellent adsorption capacity for acidic dyes on the basis of the pore-rich and amine-rich graphene structure, which is superior to other carbon materials.
Journal ArticleDOI
Micelles as Soil and Water Decontamination Agents.
Afzal Shah,Suniya Shahzad,Azeema Munir,Mallikarjuna N. Nadagouda,Gul Shahzada Khan,Dilawar Farhan Shams,Dionysios D. Dionysiou,Usman Ali Rana +7 more
TL;DR: This Review is focused on the currently employed surfactant-based soil and wastewater treatment technologies owing to their critical role in the implementation of certain solutions for controlling pollution level, which is necessary to protect human health and ensure the quality standard of the aquatic environment.
Journal ArticleDOI
Surfactants-based remediation as an effective approach for removal of environmental pollutants—A review
TL;DR: In this paper, the authors present a review of micelles/surfactants-assisted abatement of a vast number of toxic agents from water/wastewater including volatile organic compounds, personal care products, pharmaceutically active residues, toxic metals, dye pollutants, pesticides, and petroleum hydrocarbons.
Journal ArticleDOI
Adsorption of light green anionic dye using cationic surfactant-modified peanut husk in batch mode
TL;DR: In this paper, a cationic surfactant hexadecylpyridinium bromide (CPB) was used as an adsorbent to remove light green dye (LG, anionic dye) from aqueous solution in batch mode.
Journal ArticleDOI
Synthesis, Characterization, and Silver Adsorption Property of Magnetic Cellulose Xanthate from Acidic Solution: Prepared by One Step and Biogenic Approach
TL;DR: In this article, magnetic cellulose xanthate was prepared with two different routes, i.e., fabrication of Fe3O4@cellulose followed by preparation of xanthates, and a one step approach by adding iron source to cellulose Xanthate solution.
References
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Pore- and Solid-Diffusion Kinetics in Fixed-Bed Adsorption under Constant-Pattern Conditions
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Equilibrium isotherm studies for the sorption of divalent metal ions onto peat: copper, nickel and lead single component systems
TL;DR: In this article, the Sips equation was used to determine the best fit isotherm for each system, and six error analysis methods were used to evaluate the data: the coefficient of determination, the sum of the errors squared, a hybrid error function, Marquardt's percent standard deviation, the average relative error, and sum of absolute errors.
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Removal of congo red from aqueous solution by bagasse fly ash and activated carbon: Kinetic study and equilibrium isotherm analyses
TL;DR: Thermodynamics showed that the adsorption of CR on BFA was most favourable in comparison to activated carbons, and the R-P isotherm best-fits the CR adsorbent data on all adsorbents.