Process development for the batch and bulk removal and recovery of a hazardous, water-soluble azo dye (Metanil Yellow) by adsorption over waste materials (Bottom Ash and De-Oiled Soya)

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

doi:10.1016/j.jhazmat.2007.06.059

Cited by 264 publications

(83 citation statements)

References 47 publications

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“…Similar findings were reported by Gupta et al (2011) on chromium removal that there was a limit (pH 5) at which the pH could be increased to get maximum removal efficiency. Mittal et al (2008) evaluated the effect of pH range from 1 to 10 in the uptake of azo dye by adsorption and found out that there was a drastic reduction in the amount of dye adsorbed as the pH increased. Same reason as previously given was attributed to the effects of pH.…”

Section: Effect Of Phmentioning

confidence: 99%

Application of response surface methodology (RSM) for optimization of color removal from POME by granular activated carbon

Al-Khatib

Mamun

Akbar

2014

Int. J. Environ. Sci. Technol.

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Color is one of the major remaining contaminants in the palm oil mill effluent (POME) following the conventional treatment of POME. The removal of color from POME using adsorption on activated carbon was investigated. The adsorption experimental design was performed using the standard response surface method (RSM) design that is central composite design to determine the optimum process variables for color removal by using the Design-Expert software (version 7.0. Stat-Ease, trial version). Besides obtaining optimum values, RSM also has the advantage of studying the interaction between various experimental parameters compared to one-factor-at-a-time. The equilibrium experimental data were analyzed by Langmuir and Freundlich isotherms. The statistical analysis showed that the quadratic model as well as the model terms was significant. The model had very low probability value (0.0003). The R 2 for the model was 0.9184 and the adjusted R 2 was 0.8380. The validation of the model showed experimental value and predicted value of 0.124 and 0.106, respectively. The optimum conditions suggested by the model for the process variable were 87.9 min, 4.05 and 7.86 g, for time, pH and granular activated carbon dose, respectively. The maximum removal obtained at these conditions was 89.95 %. The adsorption isotherm data were fitted well to the Langmuir isotherm compared to Freundlich isotherm with R 2 value of 0.850 for the former and 0.273 for the later.

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Section: Effect Of Phmentioning

confidence: 99%

Application of response surface methodology (RSM) for optimization of color removal from POME by granular activated carbon

Al-Khatib

Mamun

Akbar

2014

Int. J. Environ. Sci. Technol.

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“…In the last few years there has been an emphasis to develop waste materials as potential scavengers for the removal of different types of pollutants from water and waste materials such as baker's yeast [18], tamarind wood [19], agricultural waste biomass [20], gypsum [21], and sludge [22,23] have been employed. A significant contribution in the removal of toxic dyes from the wastewater has also been made from our laboratories [24][25][26][27][28][29][30][31][32][33][34][35][36].…”

Section: Introductionmentioning

confidence: 99%

Adsorptive removal of hazardous anionic dye “Congo red” from wastewater using waste materials and recovery by desorption

Mittal

Malviya

et al. 2009

Journal of Colloid and Interface Science

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662

210

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a b s t r a c tThe present investigation assesses the applicability of waste materials-bottom ash and deoiled soya-for the removal of the colorant Congo red from wastewaters. The adsorption characteristics and dye removal efficiency of adsorbents have been determined by investigating factors such as effect of pH, effect of concentration of the dye, amount of adsorbents, contact time, and temperature. Langmuir, Freundlich, Tempkin, and Dubinin-Radushkevich isotherm models have been used to evaluate the ongoing adsorption. With the help of adsorption isotherm data different thermodynamic parameters such as free energy; enthalpy, and entropy have been calculated. The estimated free energy has been obtained as À21.52 kJ mol À1 for bottom ash and À16.88 kJ mol À1 for deoiled soya. On the basis of pseudo-first-order and pseudo-second-order kinetic equations different kinetic parameters have been obtained. Column operations depicted good adsorptive tendencies for Congo red with 96.95% and 97.14% saturation of dye on bottom ash and deoiled soya, respectively. Regeneration of the saturated columns has been made by eluting NaOH solution and more than 90% dye has been recovered in both cases.

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“…Among them, we can include heavy metals, dyes, pesticides, rubber chemicals and diverse industrial wastes and different approaches have been devised in order to reduce them. These strategies include, for example, adsorption to remove heavy metals or dyes (Jain et al 2003;Gupta et al 2006Gupta et al , 2007aGupta et al , 2009Gupta et al , 2010Gupta et al , 2011Mittal et al 2008), photochemical degradation (Gupta et al 2007b), biosorption (Mittal et al 2010) and advanced oxidation process (AOP) (Karthikeyan et al 2012).…”

Section: Introductionmentioning

confidence: 99%

Isolation and characterization of an aerobic bacterial consortium able to degrade roxarsone

Guzmán‐Fierro

Moraga

León

et al. 2014

Int. J. Environ. Sci. Technol.

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Roxarsone is an organoarsenical compound used as food additive in the poultry industry. Roxarsone has the potential risk to contaminate the environment, mainly by the use of poultry industry manure as fertilizer, releasing inorganic arsenic to the soil and water. The aim of this work was to isolate and characterize a bacterial consortium capable to degrade roxarsone under aerobic conditions. A bacterial consortium was cultured from a soil sample obtained from a field fertilized with poultry litter containing roxarsone. The consortium was cultured in the presence or absence of roxarsone. Roxarsone degradation and growth kinetics were determined by incubation of the bacterial consortium in the presence of roxarsone at room temperature and under aerobiosis. Both consortiums were characterized molecularly by denaturing gradient gel electrophoresis analysis and metabolically using Biolog Ecoplates. Inorganic arsenic was assessed by precipitation with silver nitrate. The consortium was also analyzed by scanning electron microscopy. The results showed that growth rate of the bacterial consortium was 1.4-fold higher in presence of roxarsone and 81.04 % of the roxarsone was transformed after 7 days of incubation. Molecular characterization revealed the presence of different bacterial groups, being alphaproteobacteria and firmicutes the groups that showed the highest count in both consortiums. The metabolic profile of the consortium did not change in the presence of roxarsone, but it showed a greater ability to oxidize amines, suggesting production of functional amines to decrease the stability of the aromatic ring resonance energy, the principal problem associated with aromatic compounds degradation.

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Process development for the batch and bulk removal and recovery of a hazardous, water-soluble azo dye (Metanil Yellow) by adsorption over waste materials (Bottom Ash and De-Oiled Soya)

Cited by 264 publications

References 47 publications

Application of response surface methodology (RSM) for optimization of color removal from POME by granular activated carbon

Application of response surface methodology (RSM) for optimization of color removal from POME by granular activated carbon

Adsorptive removal of hazardous anionic dye “Congo red” from wastewater using waste materials and recovery by desorption

Isolation and characterization of an aerobic bacterial consortium able to degrade roxarsone

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