Adsorption of hazardous dye crystal violet from wastewater by waste materials

Mittal, Alok; Mittal, Jyoti; Malviya, Arti; Kaur, Dipika; Gupta, Vinod Kumar

doi:10.1016/j.jcis.2009.11.060

Cited by 713 publications

(281 citation statements)

References 60 publications

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“…The Freundlich isotherm is based on two hypotheses: (1) adsorption occurs on a heterogeneous surface and (2) the heat of adsorption is exponentially distributed over the adsorbent surface Mittal et al 2010).…”

Section: Empirical Isotherm Modelsmentioning

confidence: 99%

“…Empirical models based on partition coefficients (K d ) or semiempirical Langmuir or Freundlich isotherms are often used to describe adsorbate partitioning between solutions and solid phases (Datta and Bhadoria 1999;Elrashidi and O'Connor 1982;Gupta et al 2007Gupta et al , 2010Mittal et al 2010;Ranjbar and Jalali 2012). However, because partition coefficients depend on solution and solid composition, they cannot be utilized beyond the conditions for which they are measured.…”

Section: Introductionmentioning

confidence: 99%

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Surface complexation model of boron adsorption by calcareous soils

Ranjbar

Jalali

2014

Int. J. Environ. Sci. Technol.

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This study aimed to evaluate boron (B) adsorption and the capacity of a surface complexation model for simulating this process in calcareous soils. Ten surface soils were collected from different land use areas in Hamedan, Western Iran, to characterize B sorption by soils. The mean B adsorbed by the sample soils varied from 8.9 to 32.8 %. Two empirical models including linear and Freundlich equations fitted well to the experimental data. The linear distribution (K d ) values varied from 1.32 to 6.86 L kg -1 , while the parameters of Freundlich equation including n and K Fr ranged from 1.16 to 1.33 and 3.31-16.81, respectively. The comparison of two empirical models indicated that B adsorption followed a nonlinear pattern. The soil organic matter had positive correlations with Freundlich and linear distribution coefficients. However, empirical models were not suitable for explaining the mechanism of B adsorption, so a surface complexation model was used to simulate and predict the B adsorption process. B adsorption modeling was conducted using Visual MINTEQ and PHREEQC, based on the assemblage of major surface components (hydrous ferric oxides, aluminum hydroxides, calcium carbonate, and humic acids). B adsorption was successfully modeled by surface complexation. The significant contribution of organic matter to B complexes was resulted from both experimental data and mechanistic modeling.

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Section: Empirical Isotherm Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Surface complexation model of boron adsorption by calcareous soils

Ranjbar

Jalali

2014

Int. J. Environ. Sci. Technol.

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“…CV is used in human and veterinary medicine as biological stains. As other TPM dyes, CV is also involved in paper, food, cosmetic, and rubber industries, and for coloring of oils, lipids, varnished plastics (Chiing-Chang et al 2007;Mittal et al 2010;Parshetti et al 2011). Due to its high aromatic content, which stabilizes the molecule, CV is poorly metabolized by microorganisms and has a long life in the environment (Moturi and Singaracharya 2009).…”

Section: Introductionmentioning

confidence: 99%

Gliding arc discharge-assisted biodegradation of crystal violet in solution with Aeromonas hydrophila strain

Njiki

Kamgang‐Youbi

Laminsi

et al. 2015

Int. J. Environ. Sci. Technol.

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The gliding arc discharge, which is a source of nonthermal plasma, was used to enhance the biodegradation of crystal violet (CV), a triphenylmethane nonbiodegradable organic dye. The determination of the biodegradability index, i.e., biochemical oxygen demand (BOD 5 )/chemical oxygen demand (COD) ratio, and the total organic carbon measurement were used to assess the biodegradability. For the biological treatment alone, a bacterial strain of Aeromonas hydrophila (8 9 10 8 -CFU mL -1 ) bleached 42 % of CV solution (50 mg L -1 ) after 12-h incubation. The bleaching rate was enhanced by increasing the initial bacterial concentration; however, a drop in the bleaching rate was noted when CV concentration was increased. For the plasma process alone, a 15-min treatment resulted in a color removal of 49.7 %, at a mineralization rate of 12.2 %, thereby increasing the BOD 5 /COD ratio from 0.11 to 0.23. There was an increase in the bleaching rate in temporal post-discharge conditions (i.e., self-continuity of reaction after the discharge was switched off): For 2 h of temporal post-discharge reaction, the color removal of the 15-min plasma-pre-treated CV increased to 55 %. The disappearance of color during each treatment method followed the first-order kinetics. With regard to the combined plasma/biological treatment process, the 15-min plasma-pre-treated sample was bleached at 92 % by A. hydrophila after 2-h incubation and completely bleached for 6 h. Therefore, there is a positive synergism of bacterial and plasma treatments. This combined treatment is useful in reducing the energy involved in complete mineralization of wastewater containing nonbiodegradable dyes.

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“…[1][2][3][4] There is a need for an effective method to remove pollutants. [5][6][7][8][9] Photocatalysis has been widely used as a novel treatment for destroying organic pollutants.…”

Section: Introductionmentioning

confidence: 99%

Preparation of C<sub>60</sub> Nanowhiskers/WO<sub>3</sub> Nanocomposites and Photocatalytic Degradation of Organic Dyes

Kim¹,

Ko²,

Ko³

2015

Elastomers and Composites

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C 60 nanowhiskers were synthesized from C 60 by liquid-liquid interfacial precipitation (LLIP) using C 60 -saturated toluene and isopropyl alcohol. The WO 3 nanoparticles were synthesized by adding 3.8 × 10 −4 mole amount of ammonium metatungstate hydrate (H 26 N 6 O 40 W 12 ·H 2 O) to 500 ml of distilled water, and the resulting solution was heated on a hot plate for 4 h. The C 60 nanowhiskers/WO 3 nanocomposites were prepared with C 60 nanowhiskers and WO 3 nanoparticles in an electric furnace at 700°C in an argon gas atmosphere for 2 h. The C 60 nanowhiskers/WO 3 nanocomposites were characterized by X-ray diffraction, scanning electron microscopy, and transmission electron microscopy. UV-vis spectroscopy was used to evaluate the performance of the C 60 nanowhiskers/WO 3 nanocomposites as a photocatalyst in the degradation of organic dyes, such as methylene blue (MB) and brilliant green (BG) under ultraviolet light (254 nm).

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Adsorption of hazardous dye crystal violet from wastewater by waste materials

Cited by 713 publications

References 60 publications

Surface complexation model of boron adsorption by calcareous soils

Surface complexation model of boron adsorption by calcareous soils

Gliding arc discharge-assisted biodegradation of crystal violet in solution with Aeromonas hydrophila strain

Preparation of C<sub>60</sub> Nanowhiskers/WO<sub>3</sub> Nanocomposites and Photocatalytic Degradation of Organic Dyes

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