Removal of Remazol brilliant violet textile dye by adsorption using rice hulls

Ribeiro, Geyse Adriana Corrêa; Silva, Domingos Sérgio Araújo; Santos, Clayane Carvalho dos; Vieira, Adriana P.; Bezerra, Cícero Wellington Brito; Tanaka, Auro Atsushi; Santana, Sirlane Aparecida Abreu

doi:10.1590/0104-1428.2386

Cited by 27 publications

(17 citation statements)

References 53 publications

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“…Following adsorption, new bands appear, including at 1398 cm -1 , representing sulfonic groups characteristic of the dye; at 1648 cm -1 , indicating naphthalene; and between 1980 and 2281 cm -1 , representing the dye fingerprint zone. Stretching vibrations appear above 2967 cm -1 , specific to phenolic O-H, secondary amine N-H, and aromatic C-H bonds [48][49][50] .…”

Section: Adsorption Kinetics and Diffusion Modelsmentioning

confidence: 99%

“…When the eggshell powder was mixed with the dye solution, calcium salts may partially dissolve and release Ca 2+ , HCO 3 − , CO 3 2− and OH − ions, which can form a negatively surfaced charge 54,55 . In acidic media (HCl), the eggshell surface exhibits a positive charge, so there is a high electrostatic attraction between the eggshell powder and the anionic, negatively charged dye (this dye contains aromatic rings such as phenolic OH and sulfonate SO 3 − groups that ionize in aqueous solution and form coloured anions 49 ). By adding NaOH, the number of negatively charged sites of eggshell increases, resulting in electrostatic repulsion.…”

Section: Possible Adsorption Mechanismmentioning

confidence: 99%

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Adsorption of Remazol Brilliant Violet-5R Textile Dye from Aqueous Solutions by Using Eggshell Waste Biosorbent

Rápó

Aradi

Szabó

et al. 2020

Sci Rep

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Based on the well-known excellent adsorbent ability of chicken eggshells, the adsorptive capacity and mechanism of Remazol Brilliant Violet-5R (RBV-5R) dye by eggshell was investigated. Exploiting the high surface-area-to-volume ratio and porous structure of this natural adsorbent, the developed procedure showed to be useful for the efficient adsorption of RBV-5R dye from contaminated water. The protocol was thoroughly optimized by investigating the effect of the dye concentration, biomasscontaminated water ratio, particle size of the adsorbent, pH and temperature, as they are key factors in the efficiency of the dye removal process. The eggshell material was characterized by different types of microscopy techniques (stereo, polarization, SEM) as well as elemental analysis (element distribution mapping, EDX), Raman spectroscopy and BET-surface density measurements. EDX, FTIR and Raman spectroscopy proved the presence of the adsorbed dye on the surface of the biomaterial. It was shown that under optimal conditions, the environmentally friendly and inexpensive eggshell could be a reliable adsorbent for Remazol dye removal from wastewater. One of today's global challenges is to supply healthy, pure and consumable water to safeguard public health since a growing variety of toxic organic and inorganic pollutants are occurring in water bodies 1. According to the 2015 World Water Development Report, the demand for water around the world will increase by 55% over the next 15 years, indicating that the Earth's current water supplies can cover only 60% of our future needs by 2030 2. With rapid industrial development, the overexploitation of natural resources, industrial and natural disasters, the number of polluted water sites contaminated with heavy metals 3-6 , radioactive elements 7,8 , nitrite 9,10 , phosphate 11,12 , pesticides 13 , dyes 14-16 , etc., are continuously increasing. Dyes are widely utilized in the paper, pulp, paint and textile industries, with a large amount of water demand for washing and cleaning purposes. Based on the Colour Index, currently, more than 10 000 various types of synthetic dyes are available worldwide. In 2014, more than 1.5 million tons of dyes were produced annually. Fifty percent of these dyes are used by the textile industry, where during the colouring process, 1-10% of these dyes are discharged 17,18. Due to the high solubility and low biodegradability of these compounds, dye-polluted industrial wastewater is one of the most difficult types of wastewater to clean. Remazol Brilliant Violet-5R (RBV-5R), a reactive dye, is used to colour cellulosic fibres. After the colorization process, approximately 10-50% of the initial dye load remains unused 19. Biosorption is a promising method for removing persistent compounds, i.e., non-biodegradable compounds. Recently, various materials such as nanocomposites, households and industrial wastes have been used as biosorbents for inorganic and organic contaminant removal 5,11,20,21. Coconut residual fibres 22 , low-cost activated charcoal from to...

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Section: Adsorption Kinetics and Diffusion Modelsmentioning

confidence: 99%

Section: Possible Adsorption Mechanismmentioning

confidence: 99%

Adsorption of Remazol Brilliant Violet-5R Textile Dye from Aqueous Solutions by Using Eggshell Waste Biosorbent

Rápó

Aradi

Szabó

et al. 2020

Sci Rep

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“…The values of the contact angles at different concentrations of stearic acid for the fabrics treated in ethanol and in toluene are reported in Table 2. [61,62]. The slight shift of the resonance corresponding to the group -CO-with respect to the same group -CO-of the stearic acid, together with the broadening of the signals corresponding to the -CH2groups of the aliphatic chain of the stearic acid, as well as a slight chemical shift, would indicate the binding or formation of ester groups in the flax fabric after treatment.…”

Section: Characterization Of Composites Reinforced With Flax Fabrics mentioning

confidence: 99%

Effect of Carbon Nanostructures and Fatty Acid Treatment on the Mechanical and Thermal Performances of Flax/Polypropylene Composites

et al. 2020

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Four different strategies for mitigating the highly hydrophilic nature of flax fibers were investigated with a view to increase their compatibility with apolar polypropylene. The effects of two carbon nanostructures (graphene nanoplatelets (GNPs) and carbon nanotubes (CNTs)), of a chemical modification with a fatty acid (stearic acid), and of maleated polypropylene on interfacial adhesion, mechanical properties (tensile and flexural), and thermal stability (TGA) were compared. The best performance was achieved by a synergistic combination of GNPs and maleated polypropylene, which resulted in an increase in tensile strength and modulus of 42.46% and 54.96%, respectively, compared to baseline composites. Stearation proved to be an effective strategy for increasing the compatibility with apolar matrices when performed in an ethanol solution with a 0.4 M concentration. The results demonstrate that an adequate selection of surface modification strategies leads to considerable enhancements in targeted properties.

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“…The observed data are well reproduced in the simulated data, as shown in Figure 7, supporting that all the isotherm data are described well by the Langmuir equation. A comparison of maximum RBV dye adsorption onto various adsorbents reported in the literature [41][42][43][44] is shown in Table 5. Chitosan 10B is found to be an efficient and promising adsorbent to remove RBV from aqueous solution.…”

Section: Langmuir Isothermmentioning

confidence: 99%

Adsorption of Remazol Brilliant Violet Onto Chitosan 10b in Aqueous Solution: Kinetics, Equilibrium and Thermodynamics Studies

Karmaker¹,

Nag²,

Saha³

2019

Cellulose Chem. Technol.

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The adsorption characteristics of Remazol Brilliant Violet (RBV) dye onto chitosan 10B were investigated in aqueous solutions as a function of solution pH, dye concentration, ionic strength and temperature, respectively. The adsorption kinetics data obtained from various batch experiments were analyzed by using pseudo-first-and pseudo-second-order, as well as Elovich and intraparticle diffusion kinetic models. The results exhibited that the sorption process obeys pseudo-second order kinetics, whereas intraparticle diffusion is the rate determining step. The equilibrium adsorption isotherm data are fitted better by the Langmuir model rather than by the Freundlich, Temkin and Dubinin-Radushkevich models. Moreover, the mean adsorption energy (E) from the Dubinin-Radushkevich isotherm and the activation energy (E a ) from the Arrhenius equation indicate that the RBV adsorption onto chitosan 10B is a physisorption process. Thermodynamic parameters, such as the changes in free energy (∆G), enthalpy (∆H) and entropy (∆S), suggest that the RBV dye adsorption onto chitosan 10B in aqueous solution is spontaneous and endothermic in nature. Desorption tests were carried out in a NaOH solution (pH 12.5) and the chitosan flakes were found to be reusable.

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Removal of Remazol brilliant violet textile dye by adsorption using rice hulls

Cited by 27 publications

References 53 publications

Adsorption of Remazol Brilliant Violet-5R Textile Dye from Aqueous Solutions by Using Eggshell Waste Biosorbent

Adsorption of Remazol Brilliant Violet-5R Textile Dye from Aqueous Solutions by Using Eggshell Waste Biosorbent

Effect of Carbon Nanostructures and Fatty Acid Treatment on the Mechanical and Thermal Performances of Flax/Polypropylene Composites

Adsorption of Remazol Brilliant Violet Onto Chitosan 10b in Aqueous Solution: Kinetics, Equilibrium and Thermodynamics Studies

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