<span style="font-size:11.0pt;font-family: "Times New Roman","serif";mso-fareast-font-family:"Times New Roman";mso-bidi-font-family: Mangal;text-transform:uppercase;mso-ansi-language:EN-GB;mso-fareast-language: EN-US;mso-bidi-language:HI" lang="EN-GB">A <span style="font-size:11.0pt; font-family:"Times New Roman","serif";mso-fareast-font-family:"Times New Roman"; mso-bidi-font-family:Mangal;mso-ansi-language:EN-GB;mso-fareast-language:EN-US; mso-bidi-language:HI" lang="EN-GB">low cost adsorbent prepared from <i>Curcuma angustifolia</i> scales for removal of Basic violet 14 from aqueous solution</span></span>

Abstract

<span style="font-size:11.0pt;font-family: " times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";mso-bidi-font-family:="" mangal;mso-ansi-language:en-gb;mso-fareast-language:en-us;mso-bidi-language:="" hi"="" lang="EN-GB">The adsorption characteristics of a low cost adsorbent prepared from <i>Curcuma angustifolia </i><span style="mso-bidi-font-style:italic">scales (CA) for the removal of Basic Violet 14 from aqueous solution has been investigated. <span style="mso-bidi-font-weight: bold">The experimental data have been analyzed by Langmuir, Freundlich and Temkin isotherm models. The results show that the adsorption isotherm is best defined by the Langmuir isotherm model and the adsorption capacity is found to be 208.33 mg/g for the prepared low cost adsorbent. The adsorption capacity of the prepared low cost adsorbent is superior compared with that of the adsorption capacity of calgon carbon. <span style="font-size: 11.0pt;font-family:" times="" new="" roman","serif";mso-fareast-font-family:+mn-ea;="" mso-bidi-font-family:mangal;mso-font-kerning:12.0pt;mso-ansi-language:en-gb;="" mso-fareast-language:en-us;mso-bidi-language:hi"="" lang="EN-GB">The kinetic data result at different concentrations have been analysed using pseudo first-order and pseudo-second order model. Boyd plot indicate that the adsorption of dye onto the low cost adsorbent and calgon carbon is controlled by film diffusion.<span style="font-size:11.0pt;font-family:" times="" new="" roman","serif";="" mso-fareast-font-family:"times="" roman";mso-bidi-font-family:mangal;="" mso-ansi-language:en-gb;mso-fareast-language:en-us;mso-bidi-language:hi;="" mso-bidi-font-weight:bold"="" lang="EN-GB"> Thermodynamic analysis indicate that the adsorption process is endothermic in nature. <span style="font-size: 11.0pt;font-family:" times="" new="" roman","serif";mso-fareast-font-family:"times="" roman";="" mso-bidi-font-family:mangal;mso-ansi-language:en-gb;mso-fareast-language:en-us;="" mso-bidi-language:hi"="" lang="EN-GB">The adsorbent is characterized by Fourier transformation infrared spectrometry (FTIR) and scanning electron microscopy (SEM). <span style="mso-bidi-font-weight:bold">The material used in this study is an agricultural waste product, economical to use as an alternative to costlier adsorbents and can be an attractive option for dye removal in wastewater treatment processes in industries.</span></span></span></span></span></span></span>