Adsorption of dyes from aqueous solutions on activated charcoal

Iqbal, Muhammad; Ashiq, Muhammad Naeem

doi:10.1016/j.jhazmat.2006.06.007

Cited by 443 publications

(194 citation statements)

References 30 publications

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“…The positive value of ΔSº suggested increased randomness at the solid/solution interface with some structural changes in the adsorbate and the adsorbent and an affinity of the adsorbent toward dye (Srivastava et al, 2006). Though the adsorption of dyes is currently described as an exothermic phenomenon (Jain et al, 2003;Iqbal and Ashiq, 2007), endothermic adsorption was also reported in the literature: acid orange 7 dye in aqueous solutions using spent brewery grains (Silva et al, 2004), methylene blue adsorption using wheat shells (Bulut and Aydin, 2006) and malachite green and basic red using activated carbon and activated slag (Gupta et al, 1997;Gupta et al, 2003). Iqbal and Ashiq (2007) reported ΔSº negative values for the adsorption of the following dyes from aqueous solutions on activated carbon: alizarine red-S, methyl blue, methylene blue, eriochrome black-T, malachite green, phenol red and methyl violet, indicating that the randomness at the solid-solution interface decreased during adsorption.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

“…Though the adsorption of dyes is currently described as an exothermic phenomenon (Jain et al, 2003;Iqbal and Ashiq, 2007), endothermic adsorption was also reported in the literature: acid orange 7 dye in aqueous solutions using spent brewery grains (Silva et al, 2004), methylene blue adsorption using wheat shells (Bulut and Aydin, 2006) and malachite green and basic red using activated carbon and activated slag (Gupta et al, 1997;Gupta et al, 2003). Iqbal and Ashiq (2007) reported ΔSº negative values for the adsorption of the following dyes from aqueous solutions on activated carbon: alizarine red-S, methyl blue, methylene blue, eriochrome black-T, malachite green, phenol red and methyl violet, indicating that the randomness at the solid-solution interface decreased during adsorption. However in case of dye bromophenol blue, the entropy increased like in the present work and the same phenomenon was reported by Gupta et al (1997), Gupta et al (2003), Silva et al (2004), Bulut and Aydin (2006) for others dyes.…”

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

See 1 more Smart Citation

Adsorption of remazol brilliant blue on an orange peel adsorbent

Mafra

Igarashi‐Mafra

Zuim

et al. 2013

Braz. J. Chem. Eng.

126

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-A novel orange peel adsorbent developed from an agricultural waste material was characterised and utilised for the removal of Remazol Brilliant Blue from an artificial textile-dye effluent. The adsorption thermodynamics of this dye-adsorbent pair was studied in a series of equilibrium experiments. The time to reach equilibrium was 15 h for the concentration range of 30 mg L -1 to 250 mg L -1 . The adsorption capacity decreased with increasing temperature, from 9.7 mg L -1 at 20 °C to 5.0 mg L -1 at 60 °C. Both the Langmuir and Freundlich isotherm models fitted the adsorption data quite reasonably. The thermodynamic analysis of dye adsorption onto the orange peel adsorbent indicated its endothermic and spontaneous nature. Thus, the application of orange peel adsorbent for the removal of dye from a synthetic textile effluent was successfully demonstrated.

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Section: Adsorption Thermodynamicsmentioning

confidence: 99%

Section: Adsorption Thermodynamicsmentioning

confidence: 99%

Adsorption of remazol brilliant blue on an orange peel adsorbent

Mafra

Igarashi‐Mafra

Zuim

et al. 2013

Braz. J. Chem. Eng.

126

View full text Add to dashboard Cite

show abstract

“…Most of the dyes used in the textiles industries are stable to light and non biodegradable [7]. In order to reduce the risk of environmental pollution from such wastewater, it is necessary to treat them before discharging it into the environment [8]. Physical and chemical processes has been usually used to treat the wastewater.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic degradation of textile dyes by hydrogel supported titanium dioxide nanoparticles

Harikumar¹,

Joseph²,

Dhanya³

2013

J Environ Eng Ecol Sci

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Background: Textile industry has been condemned as one of the world's worst offenders in terms of pollution because 10-15% of all the dyes used in the industry are lost within wastewater during processing. The presence of even very low concentrations of dyes in effluent is highly visible and degradation products of these textile dyes are often carcinogenic. Owing to the complex nature of synthetic dyes, conventional biological treatment methods are ineffective. Hence there exist needs for developing treatment techniques that can lead to the complete destruction of the dye molecules from waste stream. The current study focused to develop a new photocatalytic reactor using immobilized TiO 2 capacity to decolourise and degrade textile industry effluent in an effective way. Methods: TiO 2 nanoparticles synthesized by simple precipitation method at pH 5 was successfully entrapped in biopolymer calcium (Ca)-alginate and used as heterogeneous photocatalyst for the degradation of various textile dyes using UV radiations. Photocatalyst was characterized by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The influence of previous operational parameters on the photodegradation has been studied by setting up a laboratory scale photocatalytic reactor. Results: The scanning electron microscopic images indicate that, the alginate gel acts as a bridge that binds the nanoparticles together. The experimental results showed that the rate of degradation depends on the chemical structure of different dyes as well as adsorption of dyes by TiO 2 which is directly proportional to the surface area and dispersion of the catalyst, the adsorption of light by the dye. The kinetics of COD disappearance was slower than the discoloration of the solution. The supported TiO 2 can be used several times without lose of efficiency Conclusions: The results of this study have shown that the degradation of different textile dyes was successfully carried out in laboratory scale photoreactor containing coated TiO 2 as photo catalyst. Calcium alginate can be used as a green support for immobilizing TiO 2 nanoparticles and can be used for developing a new environment friendly immobilization system for large scale water treatment.

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“…AC has also been used for the removal of dye wastewaters (Chandra et al, 2007;Regti et al, 2017;Hameed et al, 2017;Kumar et al, 2018). The wide application of AC was due to its high surface area and high pore volume (Iqbal and Ashiq, 2007;Sethia and Sayari, 2016). Moreover, the application of AC produces effluents containing very low of dissolved organic concentrations (Chandra et al, 2007).…”

Section: Introductionmentioning

confidence: 99%

Effects of Fe2+ and Fe3+ ratio impregnated onto local commercial activated carbon coconut shell powder on the dye removal efficiency

et al. 2018

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Sejarah artikel:The present study reports the performance of magnetic activated carbon impregnated with Fe 2+ and Fe 3+ on the removal of dye from a simulated wastewater. The magnetic activated carbon (MAC) as a magnetic absorbent was prepared by co-precipitation method and followed by impregnation process. The activated carbon (AC) was supplied from a local commercial activated carbon coconut shell powder. The objective of this study was to investigate the effects of Fe 2+ and Fe 3+ on the quality product of MAC for dye (methylene blue) adsorption. The molar ratios of Fe 2+ and Fe 3+ used during the preparation of the MAC were 1:1; 1:2, and 2:1. The MAC products were characterized by using scanning electron microscope (SEM), energy dispersive X-ray (EDX), and Fourier transform infrared spectroscopy (FT-IR) analysis techniques. The results confirmed that the concentration of magnetic particles (Fe 3 O 4 ) on the MAC surface increased following the impregnation process. However, this results lowering adsorption properties of the MAC adsorbents, which subsequently affected the dye removal performance. The ratio of Fe 2+ :Fe 3+ on the MAC preparation did not significantly change the MAC absorbent on the dye removal efficiency. Additionally, MAC derived from local AC possess a prospect as a sustainable alternative for dye pollutant adsorbent.

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Adsorption of dyes from aqueous solutions on activated charcoal

Cited by 443 publications

References 30 publications

Adsorption of remazol brilliant blue on an orange peel adsorbent

Adsorption of remazol brilliant blue on an orange peel adsorbent

Photocatalytic degradation of textile dyes by hydrogel supported titanium dioxide nanoparticles

Effects of Fe2+ and Fe3+ ratio impregnated onto local commercial activated carbon coconut shell powder on the dye removal efficiency

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