scholarly journals Efficient removal of crystal violet dye using EDTA/graphene oxide functionalized corncob: a novel low cost adsorbent

RSC Advances ◽  
2019 ◽  
Vol 9 (38) ◽  
pp. 21996-22003 ◽  
Author(s):  
Huan Wang ◽  
Xin Lai ◽  
Wei Zhao ◽  
Youning Chen ◽  
Xiaoling Yang ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Crystal Violet ◽  
Low Cost ◽  
Tetraacetic Acid ◽  
Efficient Removal ◽  
Immersion Method ◽  
Ethylenediamine Tetraacetic Acid ◽  
Crystal Violet Dye

In this study, crystal violet dyes were adsorbed by EDTA functionalized corncob (EDTA-corncob) and EDTA/graphene oxide functionalized corncob (EDTA-GO/corncob), which were prepared using disodium ethylenediamine tetraacetic acid and the graphene oxide immersion method.

scholarly journals Efficient removal of crystal violet dye from aqueous solutions by vitreous tuff mineral

2014 ◽  
Vol 35 (12) ◽  
pp. 1508-1519 ◽  
Author(s):  
A. Blanco-Flores ◽  
A. Colín-Cruz ◽  
E. Gutiérrez-Segura ◽  
V. Sánchez-Mendieta ◽  
D.A. Solís-Casados ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Crystal Violet ◽  
Efficient Removal ◽  
Crystal Violet Dye

Degradation of Colored Polystyrene Films

2018 ◽  
Vol 930 ◽  
pp. 254-257 ◽  
Author(s):  
Francisca Pereira de Araújo ◽  
Josy Anteveli Osajima ◽  
Mônica Regina Silva de Araujo ◽  
Edson Cavalcanti da Silva Filho ◽  
João Sammy Nery de Souza
Keyword(s):  
Crystal Violet ◽  
Carbonyl Compounds ◽  
Low Cost ◽  
Chemical Properties ◽  
Polymer Materials ◽  
Visible Radiation ◽  
No Formation ◽  
Crystal Violet Dye ◽  
Physical And Chemical ◽  
And Chemical Properties

Polystyrene is commercial polymer of extensive use in industrial scale due to great physical and chemical properties and low cost. Lifespan of polymer materials can be changed by incorporation of additions to polymeric matrix.The present study aimed to evaluate the influence of crystal violet dye in polystyrene matrices when irradiated by visible radiation. The samples were studied in the form of films, in which solution of crystal violet (5.0x10-4mol.L-1) was added to the PS solution (8% w / w). The films were irradiated with commercial lamp for 150 hours and analyzed with UV-Vis and FTIR. The results showed that the dye degraded at a rate of 16%, however the FTIR analysis revealed that polystyrene did not degrade under the conditions studied, since no formation of carbonyl compounds was observed.

Effect of Ethylenediamine Tetraacetic Acid in Electrochemical Deposition of Zinc Selenide

2012 ◽  
Vol 501 ◽  
pp. 231-235
Author(s):  
Sook Mey Ng ◽  
Zulkarnain Zainal ◽  
Mat Yunus Wan Mahmood
Keyword(s):  
Zinc Selenide ◽  
Surface Defects ◽  
Low Cost ◽  
Quantum Confinement Effect ◽  
Green Light ◽  
Photoluminescence Intensity ◽  
Tetraacetic Acid ◽  
Photoelectrochemical Performance ◽  
Light Emitting ◽  
Ethylenediamine Tetraacetic Acid

Zinc selenide based materials are suitable for fabrication of light emitting diodes operating in the blue-green light. In fabrication of zinc selenide films, electrodeposition method appears to be the simplest and low-cost technique. In this work, the application of ethylenediamine tetraacetic acid (EDTA) in electrodeposition of zinc selenide was investigated to evaluate its effect on the optical and electronic properties of the films. It was found that the presence of EDTA stabilized the cathodic over potential during deposition. The zinc selenide deposits consist of small grain size deposits which contribute to enhance the photoelectrochemical performance. Besides that, the zinc selenide films produced in the presence of EDTA also shows high photoluminescence intensity due to minimized surface defects on the glass substrate. The film shows photoluminescence peak at the blue region of wavelength due to its quantum confinement effect. The optical property of zinc selenide film was measured using ultraviolet-visible spectrophotometer. The band gap of zinc selenide is 2.65 eV with direct transition.

scholarly journals Efficient removal of crystal violet dye from aqueous solutions using sodium hydroxide modified avocado shells: kinetics and isotherms modeling

2021 ◽  
Author(s):  
M. Ait Haki ◽  
A. Imgharn ◽  
N. Aarab ◽  
A. Hsini ◽  
A. Essekri ◽  
...  
Keyword(s):  
Sodium Hydroxide ◽  
Crystal Violet ◽  
Electrostatic Interactions ◽  
Fourier Transforms ◽  
Dye Adsorption ◽  
Order Kinetic ◽  
Efficient Removal ◽  
Ionic Strength Effect ◽  
Crystal Violet Dye ◽  
Kinetics And Isotherms

Abstract The main objective of this study is to optimize a new composite for the depollution of contaminated water. The sodium hydroxide-modified Avocado shells (NaOH-AS) were firstly prepared, characterized by field-emission-scanning-electron-microscopy (FE-SEM), X-ray energy dispersive spectroscopy (EDS) and Fourier transforms infrared (FT-IR) spectroscopy, and applied for efficient removal of Crystal violet dye (CV) in wastewater. In addition, the adsorption in a batch system of CV dye on the NaOH-AS material was studied. Therefore, we accomplished a parametric study of the adsorption by studying the effect of several important parameters on the decolorizing power of the used material, namely, initial pH, contact time, initial CV dye concentration, temperature, and the ionic strength effect on the CV dye adsorption process were systematically assessed. The highest adsorption efficiency of CV dye (>96.9%) by NaOH-AS was obtained at pH >8. The pseudo-second-order kinetic model gave the best description of the adsorption kinetic of CV dye on the AS and NaOH-AS adsorbents. Besides, the mass transfer of CV dye molecules from the solution to the adsorbent surface occurred in three sequential stages (boundary layer diffusion, intraparticle diffusion and adsorption equilibrium). The adsorption isotherm data were best fitted with the Freundlich model. The adsorption capacity of AS increased from 135.88 to 179.80 mg g−1 after treatment by 1 M NaOH. The thermodynamic study showed that CV dye adsorption onto NaOH-AS was an exothermic and feasible process. The electrostatic interactions acted as the only forces governing the CV adsorption mechanism. The NaOH-AS demonstrated a satisfactory reusability. Therefore, we can state that the as-developed NaOH-AS material has a potential application prospect as an efficient adsorbent for CV dye from wastewaters.

scholarly journals Highly efficient removal of crystal violet dye from water by MnO2 based nanofibrous mesh/photocatalytic process

2019 ◽  
Vol 8 (6) ◽  
pp. 5149-5159 ◽  
Author(s):  
Muniba Rahmat ◽  
Asma Rehman ◽  
Sufyan Rahmat ◽  
Haq Nawaz Bhatti ◽  
Munawar Iqbal ◽  
...  
Keyword(s):  
Crystal Violet ◽  
Photocatalytic Process ◽  
Efficient Removal ◽  
Highly Efficient ◽  
Crystal Violet Dye
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