Comparative Adsorption of Methylene Blue on Different Low Cost Adsorbents by Continuous Column Process

Abstract

Abstract. Dyes are commonly found in the effluents of many industries. The effectiveness of adsorption for the removal of dye from wastewaters has been made it an ideal alternative to other expensive treatment methods. Continuous column adsorption is more affective than batch adsorption. A comparative column adsorption study was performed using three different low cost adsorbents for the removal of methylene blue from synthetic wastewater. Sand was collected from Cox's Bazar, and sugarcane bagasse and used black tea leaves were locally prepared in laboratory. Three columns were designed for different adsorbents maintaining all conditions were to be approximately similar. UV-vis spectroscopic method was used for analysis of methylene blue in solution. Column adsorption experiments were performed to investigate the comparison of breakthrough curves and exhaust capacity of three different adsorbents. Column study shows that the adsorption capacity of used black tea leaves is highest. The adsorption capacity of bagasse is lower than tea leaves but higher than sand.

A Novel Electrochemical Sensing Platform for the Sensitive Detection and Degradation Monitoring of Methylene Blue

“…A 0.1 M phosphate buffer saline (PBS) was prepared from 0.1 M Na 2 HPO 4 and 0.1 M NaH 2 PO 4 . HCl and NaOH solutions of 0.1 M each were used for the preparation of PBS solutions of different pH (3)(4)(5)(6)(7)(8)(9). The NH 2 -f MWCNTs (purity > 95%) were used for electrode modification.…”

“…MB belongs to the basic class of dyes, which has a characteristic dark green appearance with a bronze luster. It shows a deep blue color in alcoholic and aqueous media [7]. It is inodorous and stable in the air [8,9].…”

Visible Light Spectroscopic Analysis of Methylene Blue in Water

“…However, deviations from linearity of the relation between A 664 and C MB are commonplace. [4][5][6][7][8][9][10] These deviations must be ascribed to the self-aggregation tendency of dyes in solution, affecting the shape of the UV-Visible spectra. In the case of methylene blue, the long historical scientific effort to provide the reliable identification of aggregates existing in solution together with accurate optical an thermodynamic parameters of formation of the different species, 11,12,[21][22][23][24][25][26][27][28][29][30][13][14][15][16][17][18][19][20] has been recently successfully accomplished.…”