Adsorptive removal of malachite green dye from aqueous solution by bagasse fly ash and activated carbon-kinetic study and equilibrium isotherm analyses

The association of dyes with health related problems is not a new phenomenon. The effectiveness of carbon adsorption for dye removal from textile effluent has made it an ideal alternative to other expensive treatment methods. The preparation of activated carbon from agricultural waste could increase economic return and reduce pollution. Cassava peel has been used as a raw material to produce activated carbon. The study investigates the removal of malachite green dye from its aqueous solution. The effects of condition such as adsorbent dosage, initial dye concentration, pH and contact time were studied. The adsorption capacity was demonstrated as a function of time for malachite green from aqueous solution by the prepared activated carbon. The results showed that as the amount of the adsorbent was increased, the percentage of dye removal increased accordingly. Higher adsorption percentages were observed at lower concentrations of malachite green dye. Silver nitrate treated cassava peel showed a better performance compared to Sulphuric acid treated and raw carbons, thus making it an interesting option for dye removal textile effluent.

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Adsorptive removal of 2,4-dichlorophenoxyacetic acid from aqueous solution using bagasse fly ash as adsorbent in batch and packed-bed techniques

Clean Technologies and Environmental Policy ◽

10.1007/s10098-016-1124-0 ◽

2016 ◽

Vol 18 (6) ◽

pp. 1971-1983 ◽

Cited By ~ 22

Author(s):

Sunil K. Deokar ◽

Sachin A. Mandavgane ◽

Bhaskar D. Kulkarni

Keyword(s):

Aqueous Solution ◽

Fly Ash ◽

Packed Bed ◽

Dichlorophenoxyacetic Acid ◽

Adsorptive Removal ◽

Bagasse Fly Ash ◽

2,4 Dichlorophenoxyacetic Acid

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Adsorption Kinetics of Malachite Green Dye Removal from Aqueous Solution by using Banana Stem

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.e2756.0610521 ◽

2021 ◽

Vol 10 (5) ◽

pp. 215-220

Author(s):

K Arun Kumar ◽

Sandeep. S,

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Malachite Green ◽

Dye Removal ◽

Agricultural Waste ◽

Research Work ◽

Isotherm Models ◽

Maximum Adsorption Capacity ◽

Malachite Green Dye ◽

Banana Stem

This research work goals at searching the effectiveness of Malachite Green dye removal using banana stem, an agricultural waste as an activated carbon. The banana stem activated carbon was made ready in the laboratory by carbonization followed by activation. Adsorption studies were carried out to check the effect of various experimental conditions like different pH values, varying contact time, initial concentration of dye and changing banana stem carbon dosage on the removal of Malachite Green dye from aqueous solution at constant Temperature and agitation speed. The equilibrium experimental data were used for applicability of Langmuir and Freundlich isotherm models and the kinetic models. Batch test showed that maximum of 99% of dye was removed when the dye concentration was 2 mg/L, at an adsorbent dose of 0.75 gm/L at dye pH 8 in 45 minutes. From the obtained results it is validated that the equilibrium data’s favorable for both Freundlich and Langmuir isotherms. Maximum adsorption capacity of banana stem carbon on malachite green dye was found to be 8.29 mg/g. It was prevailing that the adsorption process followed the pseudo-second-order rate kinetics. It was observed that intra particle diffusion is not the only rate-limiting step in this adsorption system but also regression results indicate that the linear regression model gives the best results. The above observations recommend that Banana stem carbon can be competently implemented for removal of malachite green dye from aqueous solution in the adsorption treatment processes.

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Adsorptive Removal of Malachite Green Dye from Aqueous Solution Using Chemically Modified Charred and Xanthated Wheat Bran

Journal of Nepal Chemical Society ◽

10.3126/jncs.v41i1.30495 ◽

2020 ◽

Vol 41 (1) ◽

pp. 103-109

Author(s):

Dilli Dhami ◽

Puspa Lal Homagai

Keyword(s):

Aqueous Solution ◽

Malachite Green ◽

Wheat Bran ◽

Ph Effect ◽

Attractive Alternative ◽

Adsorptive Removal ◽

Chemically Modified ◽

Malachite Green Dye ◽

Before And After ◽

Initial Ph

Adsorptive removal of Malachite Green (MB) dye from aqueous solution using chemically modified Wheat Bran has been investigated. Wheat bran was chemically modified to charred through charring process and it was further modified to xanthated through xanthation process. Batch experiments were carried out to study the experimental parameters such as effect of pH, effect of concentration and effect of contact time for both Charred Wheat Bran (CWB) and Xanthated Wheat Bran (XWB) simultaneously. The concentrations of dye ions before and after the adsorption were determined by using UV-Visible Spectrophotometer. The dye uptake was maximum for the initial pH of 4 for both CWB and XWB but the percentage removal for XWB was found to be effective in comparison with CWB i.e., 98.45% and 93.45% respectively with adsorbent dose of 0.025g and agitation speed of 190 rpm. The applicability of Langmuir isotherm was tested. The adsorption capacity of MG dye into CWB and XWB was found to be 69 mg/g and 112.9 mg/g, respectively. Similarly, the kinetic data best fitted for pseudo-second order. Hence, the result showed that XWB may be an attractive alternative for the removal of MG dye from aqueous solution in comparison to CWB as bio-adsorbent.

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