Removal of cationic methylene blue and malachite green dyes from aqueous solution by waste materials of Daucus carota

Kushwaha, Atul Kumar; Gupta, Neha; Chattopadhyaya, M. C.

doi:10.1016/j.jscs.2011.06.011

Cited by 217 publications

(112 citation statements)

References 24 publications

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“…The equation assumes a heterogeneous adsorption surface and active sites with different energy. The equation is expressed as follows [4]:…”

Section: Freundlich Adsorption Isothermmentioning

confidence: 99%

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Adsorption of Malachite Green from Aqueous Solutions onto Rice Husks: Kinetic and Equilibrium Studies

Muinde¹,

Onyari²,

Wamalwa³

et al. 2017

JEP

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A study was done to evaluate the removal of a cationic dye from simulated waste water onto rice husks (RH). Spectroscopic methods such as FTIR and SEM/EDX were used for adsorbent characterization. Experimental dependency on solution pH, initial dye concentration, agitation speed, adsorbentparticle size, temperature of the solution and contact time was evaluated. The adsorption data was tested using both Langmuir and Freundlich isotherms. The data fitted well into Langmuir isotherm model with a monolayer adsorption capacity of 6.5 mg/g. Further, the separation factor (R L ) value was less than unity indicating a favorable adsorption process. Adsorption kinetics was determined using pseudo-first-order, pseudo-second-order and intra-particle diffusion models. The results showed that the adsorption of malachite green onto rice husks followed pseudo-second-order model with a determination coefficient of 0.986. This work has revealed that rice husks have a great potential to sequester cationic dyes from aqueous solutions and therefore it can be utilized to clean contaminated effluents.

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“…The equation assumes a heterogeneous adsorption surface and active sites with different energy. The equation is expressed as follows [4]:…”

Section: Freundlich Adsorption Isothermmentioning

confidence: 99%

“…Some dyes like malachite green (MG) and methylene blue (MB) are carcinogenic and therefore it is important to remove them from effluents with respect to both environmental and aesthetical reasons [3] [4].…”

mentioning

confidence: 99%

Adsorption of Malachite Green from Aqueous Solutions onto Rice Husks: Kinetic and Equilibrium Studies

Muinde¹,

Onyari²,

Wamalwa³

et al. 2017

JEP

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show abstract

“…[38] In contrast, when pH > pH pzc , the uptake of cationic dyes was greatly improved due to increased electrostatic force of attraction. [39] In future studies, the most favourable pH condition for adsorption and the surface charge potential of biochar should be determined to assess the potential of the biochars for phosphate removal and for better designing sorption experiments with biochar.…”

Section: Possible Mechanisms For Biochar Adsorption Of Pmentioning

confidence: 99%

Pyrolysis temperature and steam activation effects on sorption of phosphate on pine sawdust biochars in aqueous solutions

Lou

Rajapaksha

et al. 2016

Chemical Speciation & Bioavailability

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Biochar can be used as an adsorbent for phosphate removal in aquatic environments to treat eutrophication problems. Designing biochars that have large phosphate adsorption capacity through altering pyrolysis conditions and applying activation techniques will improve phosphate removal efficiency. In this study, four pine sawdust biochars were produced at 300 and 550 °C with and without steam activation. Batch sorption experiments including isotherm and kinetic studies were conducted to understand how phosphate removal capabilities and adsorption mechanisms of biochars were affected by pyrolysis temperature and steam activation. Our results showed that the steam activation and pyrolysis temperature did not affect phosphate adsorption by the biochars. The four biochars removed <4% of phosphate from the aqueous solution, which were not affected by the pH of the solution and biochar application rate. The repulsion forces between biochar surfaces and phosphate ions were likely the cause of the low adsorption.

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“…Author(s) agree that this article remains permanently open access under the terms of the Creative Commons Attribution License 4.0 International License Kushwaha et al, 2014).…”

Section: Introductionmentioning

confidence: 91%

Adsorption of a cationic dye by Marula (Sclerocarya birrea) fruit seed shell based biosorbent: Equilibrium and kinetic studies

Mupa¹,

Phineas²,

Isaac³

2017

Afr. J. Biotechnol.

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Adsorption of methylene blue from aqueous solution using a low cost Sclerocarya birrea fruit shell powder based biosorbent was investigated in a batch system. Results showed that optimum adsorption capacity was achieved at pH 8 and biosorbent dosage of 0.6 g, with a maximum adsorption capacity of 27.690 mg g -1 . Equilibrium studies showed that experimental data fitted well on the Temkin isotherm (R 2 = 0.9641), as well as the Langmuir isotherm (R 2 = 0.9626). The adsorption process followed the pseudosecond order rate kinetics with R 2 values greater than 0.999. Fourier transform infrared spectroscopy (FTIR) spectrum showed the presence of absorption bands typical of a plant based biomaterial. Given the abundant availability of the S. birrea trees in Southern Africa, the seed fruit shell can be used as a source of low cost biosorbent.

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Removal of cationic methylene blue and malachite green dyes from aqueous solution by waste materials of Daucus carota

Cited by 217 publications

References 24 publications

Adsorption of Malachite Green from Aqueous Solutions onto Rice Husks: Kinetic and Equilibrium Studies

Adsorption of Malachite Green from Aqueous Solutions onto Rice Husks: Kinetic and Equilibrium Studies

Pyrolysis temperature and steam activation effects on sorption of phosphate on pine sawdust biochars in aqueous solutions

Adsorption of a cationic dye by Marula (Sclerocarya birrea) fruit seed shell based biosorbent: Equilibrium and kinetic studies

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