Malachite green adsorption by rattan sawdust: Isotherm, kinetic and mechanism modeling

Hameed, B.H.; El-Khaiary, Mohammad I.

doi:10.1016/j.jhazmat.2008.02.054

Cited by 368 publications

(142 citation statements)

References 25 publications

(25 reference statements)

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“…ions from the aqueous solution decreased and hence favouring the adsorption of protonated MG dyes onto the negatively charged adsorbent surface. Similar result was reported elsewhere by Hameed and El-Khaiary (2008). In case of azo dye AB, if the electrostatic interaction was the only step involved in the adsorption process, then, the % adsorption would have been maximum at pH ranging from 2.5 to 5.5 where the adsorbent surface will be negatively charged and the dye will be protonated as -SO 3 H. But in the observed process, JSAC might have interacted with the dye molecules through hydrogen bonding and hydrophobic-hydrophobic mechanisms as reported elsewhere by Al-Degs et al (2008).…”

Section: Influence Of Initial Phsupporting

confidence: 93%

Adsorption isotherms, kinetics and mechanism for the adsorption of cationic and anionic dyes onto carbonaceous particles prepared from Juglans regia shell biomass

Nethaji

Sivasamy

Mandal

2012

Int. J. Environ. Sci. Technol.

328

177

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In the present study, Juglans regia shells were used to prepare activated carbon by acid treatment method. J. regia shell-based activated carbon was used for the adsorption of two synthetic dyes namely, a basic dye malachite green and an acid dye amido black 10B. The prepared adsorbent was crushed and sieved to three different mesh sizes 100, 600 and 1,000 lm. The adsorbent was characterized by scanning electron microscopy, surface acidity and zero-point charge. Batch experiments were carried out by varying the parameters like initial aqueous phase pH, adsorbent dosage and initial dye concentration. The equilibrium data were tested with Langmuir, Freundlich, Redlich-Peterson and Sips isotherm at three different temperatures 293, 300 and 313 K and it was found that the Freundlich isotherm best fitted the adsorption of both the dyes. Kinetic data were tested with pseudo first-order model and pseudo second-order model. The mechanism for the adsorption of both the dyes onto the adsorbent was studied by fitting the kinetic data with intraparticle diffusion model and Boyd plot. External mass transfer was found to be the rate-determining step. Based on the ionic nature of the adsorbates, the extent of film diffusion and intraparticle diffusion varied; both being system specific. Thermodynamic parameters were also calculated. Finally, the process parameters of each adsorption system were compared to develop the understanding of the best suitable system.

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Section: Influence Of Initial Phsupporting

confidence: 93%

Adsorption isotherms, kinetics and mechanism for the adsorption of cationic and anionic dyes onto carbonaceous particles prepared from Juglans regia shell biomass

Nethaji

Sivasamy

Mandal

2012

Int. J. Environ. Sci. Technol.

328

177

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“…A similar trend was observed for the adsorption of MG to cyclodextrin-based adsorbent (Crini et al 2007), anaerobic granular sludge (Cheng et al 2008), de-oiled soya (Mittal et al 2005), hen feathers (Mittal, 2006), rattan sawdust (Hameed and El-Khaiary, 2008a;Hameed and El-Khaiary, 2008b) and rice straw.…”

Section: Effect Of Initial Phsupporting

confidence: 69%

Removal of malachite green from water by Firmiana simplex wood fiber

Jian¹,

Xiangliang²,

Zhang³

et al. 2009

Electro Journal of Biotech

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This study shows that wood fiber of Phoenix tree (Firmiana simplex) is an effective adsorbent for malachite green (MG). MG sorption behavior onto the wood adsorbent was investigated in this study. Basic condition was favorable for MG adsorption to the adsorbent. The pseudo second order equation well described MG adsorption onto the wood adsorbent. The Freundlich Isotherm could describe the sorption data. The positive value of ΔH 0 showed that adsorption of malachite green onto the wood adsorbent was endothermic. The negative values of ΔG at various temperatures indicate the spontaneous nature of the adsorption process.

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“…After surfactant modification a new small peak was observed on the IR-spectra of the organo-rice straw at 3,590cm -1 [see Fig. 2(b)], referred to as the N-H stretching group [21]. This peak indicated that an additional amount of functional groups containing N-H bonds, a major constitution of TDMA-Br, were loaded on the surface of the bio-sorbent.…”

Section: Adsorbent Characterizationmentioning

confidence: 99%

Removal of Yellow20 Dye from Aqueous Solution using Organo-rice Straw: Characteristic, Kinetic and Equilibrium Studies

Umpuch¹

2015

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Abstract.The adsolubilisation of tetradecyltrimethyl ammonium bromide byan adsorbent termed 'organorice straw' was developed in this research to enhance the decolorization behavior of yellow20 in aqueous solutions. The organo-rice straw was characterized by elemental analysis, Brunauer-Emmett-Teller (BET) method, Fourier transform infrared spectroscopy (FTIR) technique, and scanning electron microscopy (SEM) images. Batch studies were researched to address various experimental parameters such as contact time, the initial pH solution, and initial dye concentration. Results showed that the major contents of yellow20 and organo-rice straw were carbon and hydrogen indicating their hydrophobic natures. The percentage of yellow20 that was removed bythe organo-rice straw was 96.01%, higher than the 36.44% removed by the precursor. The equilibrium adsorption was reached within 3.0 h and the amount of yellow20 adsorbed was independent of the pH0. The kinetic data were fitted to pseudo-first order, pseudosecond order, and intra-particle diffusion models. Results implied that adsorption of yellow20 by this adsorbent followed the second order kinetic model and the maximum adsorption capacity was found to be 166.55 mg.g -1 . Equilibrium isotherms were analyzed by the Langmuir, Freundlich, Temkin, and DubininRadushkevtch isotherms. The Freundlich isotherm described the isotherm data with high-correlation coefficients. The results of the study indicate that organo-rice straw is a potential and active bio-sorbent for the removal of yellow20.

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Malachite green adsorption by rattan sawdust: Isotherm, kinetic and mechanism modeling

Cited by 368 publications

References 25 publications

Adsorption isotherms, kinetics and mechanism for the adsorption of cationic and anionic dyes onto carbonaceous particles prepared from Juglans regia shell biomass

Adsorption isotherms, kinetics and mechanism for the adsorption of cationic and anionic dyes onto carbonaceous particles prepared from Juglans regia shell biomass

Removal of malachite green from water by Firmiana simplex wood fiber

Removal of Yellow20 Dye from Aqueous Solution using Organo-rice Straw: Characteristic, Kinetic and Equilibrium Studies

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