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

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

Colloids and Surfaces A Physicochemical and Engineering Aspects ◽

10.1016/j.colsurfa.2005.03.027 ◽

2005 ◽

Vol 264 (1-3) ◽

pp. 17-28 ◽

Cited By ~ 354

Author(s):

Indra Deo Mall ◽

Vimal Chandra Srivastava ◽

Nitin Kumar Agarwal ◽

Indra Mani Mishra

Keyword(s):

Aqueous Solution ◽

Activated Carbon ◽

Fly Ash ◽

Kinetic Study ◽

Malachite Green ◽

Equilibrium Isotherm ◽

Adsorptive Removal ◽

Bagasse Fly Ash ◽

Malachite Green Dye

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Effective removal of malachite green dye from aqueous solution in hybrid system utilizing agricultural waste as particle electrodes

Chemosphere ◽

10.1016/j.chemosphere.2021.129634 ◽

2021 ◽

Vol 273 ◽

pp. 129634

Author(s):

A. Annam Renita ◽

Kilaru Harsha Vardhan ◽

P. Senthil Kumar ◽

P. Tsopbou Ngueagni ◽

A. Abilarasu ◽

...

Keyword(s):

Aqueous Solution ◽

Malachite Green ◽

Hybrid System ◽

Agricultural Waste ◽

Malachite Green Dye ◽

Effective Removal

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Photocatalytic Degradation of Malachite Green Dye from Aqueous Solution Using Environmentally Compatible Ag/ZnO Polymeric Nanofibers

Polymers ◽

10.3390/polym13132033 ◽

2021 ◽

Vol 13 (13) ◽

pp. 2033

Author(s):

Marwa F. Elkady ◽

Hassan Shokry Hassan

Keyword(s):

Photocatalytic Degradation ◽

Malachite Green ◽

Degradation Efficiency ◽

Solution Flow Rate ◽

Gravimetric Analysis ◽

Electrospinning Technique ◽

Malachite Green Dye ◽

Polymeric Nanofibers ◽

Before And After ◽

Surface Modified

An efficient, environmentally compatible and highly porous, silver surface-modified photocatalytic zinc oxide/cellulose acetate/ polypyrrole ZnO/CA/Ppy hybrid nanofibers matrix was fabricated using an electrospinning technique. Electrospinning parameters such as solution flow rate, applied voltage and the distance between needles to collector were optimized. The optimum homogenous and uniform ZnO/CA/Ppy polymeric composite nanofiber was fabricated through the dispersion of 0.05% wt ZnO into the dissolved hybrid polymeric solution with an average nanofiber diameter ranged between 125 and 170 nm. The fabricated ZnO-polymeric nanofiber was further surface-immobilized with silver nanoparticles to enhance its photocatalytic activity through the reduction of the nanofiber bandgap. A comparative study between ZnO polymeric nanofiber before and after silver immobilization was investigated using X-ray diffraction (XRD), scanning electron microscope (SEM), transmission electron microscopy (TEM), Fourier transform infrared (FTIR) and thermal gravimetric analysis (TGA). The photocatalytic degradation efficiency of the two different prepared nanofibers before and after nanosilver immobilization for malachite green (MG) dye was compared against various experimental parameters. The optimum degradation efficiency of nanosilver surface-modified ZnO-polymeric nanofibers was recorded as 93.5% for malachite green dye after 1 h compared with 63% for ZnO-polymeric nanofibers.

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