Removal of hazardous pharmaceutical dyes by adsorption onto papaya seeds

Weber, Caroline Trevisan; Collazzo, Gabriela Carvalho; Mazutti, Márcio A.; Foletto, Edson Luiz; Dotto, Guilherme L.

doi:10.2166/wst.2014.200

Cited by 52 publications

(10 citation statements)

References 12 publications

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“…Similar trend was found by Weber et al (2014) in the adsorption of pharmaceutical dyes onto papaya seeds. Notes: Experimental conditions: pH = 4.5; T = 25°C; adsorbent mass = 50 mg; V = 100 mL.…”

Section: Adsorption Kineticssupporting

confidence: 86%

Adsorption of hazardous dye Rhodamine B onto Brazilian natural bentonite

Zimmermann

Dotto

Kuhn

et al. 2016

IJETM

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Abstract:The potential of a Brazilian natural bentonite to remove Rhodamine B (RhB) dye from aqueous solutions was evaluated. The bentonite was characterised by X-ray diffraction, thermogravimetric analysis, particle size distribution and N 2 -adsorption isotherms. The adsorption of RhB onto bentonite was evaluated in batch system. The pH effect (2.5-10.5), kinetic curves and equilibrium isotherms (initial dye concentrations from 100 to 600 mg L -1 ) were studied at 25°C and 250 rpm. It was found that the Brazilian bentonite presented a mesoporous structure with surface area of 14.35 m 2 g -1and average pore size of 28 nm. The adsorption capacity remained practically 2 B.M. Zimmermann et al.constant from pH 2.5 to pH 10.5. The Elovich model was adequate to represent the adsorption kinetic curves. Langmuir and Freundlich models were suitable to represent the adsorption isotherm. The maximum adsorption capacity was 77.3 mg g -1 , obtained at 25°C, pH of 4.5 and adsorbent dosage of 500 mg L -1 . It was demonstrated that the Brazilian bentonite can be utilised as a promising adsorbent to remove RhB from aqueous solutions.

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Section: Adsorption Kineticssupporting

confidence: 86%

Adsorption of hazardous dye Rhodamine B onto Brazilian natural bentonite

Zimmermann

Dotto

Kuhn

et al. 2016

IJETM

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“…Separation of hazardous wastes derived from organic compounds is a common problem that is often faced currently. Several conventional methods have been done to overcome the problem of dye waste, such as oxidation 4 , coagulation and floculation 5 , adsorption 6,7 , and ion exchange 8 . Among these methods, adsorption is one effective technique for separating organic compounds from waste.…”

Section: Introductionmentioning

confidence: 99%

Adsorption of Phenol and Methylene Blue in Solution by Oil Palm Shell Activated Carbon Prepared by Chemical Activation

et al. 2018

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In this research, it has been performed carbon activation of oil palm shells (CAC) prepared by chemical treatment as adsorbents of phenol and methylene blue (MB) in solution either in the form of single or in pair solution. The activation of carbon from the oil palm shells was done physically at a temperature of 700°C for 1 hour continued with chemical activation using 10% H3PO4 for 24 hours. Identification of functional groups on the carbon from oil palm shell before and after chemically activated was performed using infrared spectrophotometer (IR) and analysis of its surface morphology was carried out using scanning electron microscope (SEM). The phenol and MB adsorption process was performed in single and binary systems using the batch method. The adsorption of phenol on CAC is optimum at pH 8 while MB at pH 11 with optimum contact time of 90 min for phenol and 120 min for MB respectively. The phenol and MB adsorption data on the CAC in the single system follow the pseudo-second-order kinetics model with the adsorption rate constant of 0.399 and 0.769 g mmol-1 min-1 respectively. The adsorption isotherms of phenol and MB in CAC tend to follow Freundlich adsorption isotherm pattern with the adsorption intensity factor (n) for phenol, MB, phenol/MB, and MB/phenol: 1.739, 1.341, 1.334, and 1.293 respectively. The adsorbent of CAC is effective to remove phenol and MB in solution, either in single or paired condition.

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“…Some methods used for dye removal from industrial wastewater are flotation 3 , filtration 4 , adsorption [5][6][7][8] and photocatalysis 9,10 . Among the various available methods, the adsorption process is one of the most effective techniques, which has been successfully employed for dye removal from wastewater [11][12][13][14][15][16][17] . Adsorption process offers significant advantages such as lowcost, efficiency and operational ease 18 .…”

Section: Introductionmentioning

confidence: 99%

Use of Brazilian Kaolin as a Potential Low-cost Adsorbent for the Removal of Malachite Green from Colored Effluents

et al. 2017

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This study investigated the potential of Brazilian kaolin as a low-cost adsorbent for the removal of Malachite Green (MG) from colored effluents. The morphology, chemical structure and surface properties of the adsorbent were investigated by characterization techniques such as X-ray diffraction, N2 adsorption-desorption isotherms, Fourier transform infrared spectroscopy, X-ray fluorescence spectrometry, scanning electron microscopy, thermogravimetric analysis and particle size distribution. A possible technological application of raw kaolin is the MG removal from aqueous media, which was investigated using batch adsorption experiments. The adsorption kinetics was studied using the pseudo-first order, pseudo-second order and Elovich models. The adsorption isotherms were studied using the Langmuir, Freundlich and Sips models. The Elovich model was the more adequate to represent the adsorption kinetic, while the equilibrium was well represented by the Langmuir model. The maximum adsorption capacity, at pH of 6.3 and temperature of 25ºC, was 128 mg g -1 , and this satisfactory result may be associated with some adsorbent properties. Therefore, the results revealed that raw kaolin can be utilized as a promising low-cost adsorbent to remove MG from colored effluents.

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Removal of hazardous pharmaceutical dyes by adsorption onto papaya seeds

Cited by 52 publications

References 12 publications

Adsorption of hazardous dye Rhodamine B onto Brazilian natural bentonite

Adsorption of hazardous dye Rhodamine B onto Brazilian natural bentonite

Adsorption of Phenol and Methylene Blue in Solution by Oil Palm Shell Activated Carbon Prepared by Chemical Activation

Use of Brazilian Kaolin as a Potential Low-cost Adsorbent for the Removal of Malachite Green from Colored Effluents

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