Volume : 6, Issue : 1, January - 2017

ADSORPTION CHARACTERISTICS OF AZJ-NC FOR REMOVING BASIC RED 111 DYE FROM WASTEWATER

K Veeravelan, S Arivoli, V Marimuthu

Abstract :

<p>&nbsp;<span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 10pt; text-align: justify; text-indent: 0.5in;">Dyes are one of the most important industrial pollutants, especially in textile industries. Many methods have been proposed in order to remove color from wastewater among which, adsorption is more acceptable due to the ability for its use in the large scale. The objective of this study was to investigate Activated Zizyphus Jujuba seed shell (AZJ-NC) as an inexpensive adsorbent for removal of Basic Red 111 from aqueous solutions. In this work the Modified </span><i style="font-family: &quot;Times New Roman&quot;, serif; font-size: 10pt; text-align: justify; text-indent: 0.5in;">Activated Zizyphus Jujuba seed shell (AZJ-NC) </i><span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 10pt; text-align: justify; text-indent: 0.5in;">has been applied for removal of the Basic Red 111 dye from aqueous environments. The effect of pH, contact time, initial concentration and amount of adsorbent were considered. In order to investigate the mechanism of the adsorption process, several kinetic models including pseudo-first order, pseudo-second order, Elovich and intra-particle diffusion were used. In addition, equiliium data was analyses to Langmuir, Freundlich, Temkin, Dubinin-Radushkevich, Hurkins-Jura, Halsay, Radlich-Peterson, Jovanovic and BET isotherm models. Results showed that the adsorption of the Basic Red 111 was enhanced with increasing initial dye concentration, pH and contact time. The optimum pH was 9. Considering the values of R</span><sup style="font-family: &quot;Times New Roman&quot;, serif; text-align: justify; text-indent: 0.5in;">2</sup><span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 10pt; text-align: justify; text-indent: 0.5in;"> (0.999), BET isotherm model and pseudo-second order kinetic model had the best fitness.</span><b style="font-family: &quot;Times New Roman&quot;, serif; font-size: 10pt; text-align: justify; text-indent: 0.5in;"> </b><span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 10pt; text-align: justify; text-indent: 0.5in;">This study has demonstrated that the Physical modified </span><i style="font-family: &quot;Times New Roman&quot;, serif; font-size: 10pt; text-align: justify; text-indent: 0.5in;">Activated Zizyphus Jujuba seed shell (AZJ-NC) </i><span style="font-family: &quot;Times New Roman&quot;, serif; font-size: 10pt; text-align: justify; text-indent: 0.5in;">can be employed as effective and inexpensive adsorbent for the removal of Basic Red 111 from aqueous environments.</span></p> <p class="Pa8" style="text-align:justify;text-indent:.5in;line-height:115%"><span style="font-size:10.0pt;line-height:115%;font-family:&quot;Times New Roman&quot;,serif"><o:p></o:p></span></p>