Adsorption of direct black-38 azo dye on p-tert-butylcalix[6]arene immobilized material

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• 作者：Muhammad Afzal Kamboh ; Asif Ali Bhatti ; Imam Bakhsh Solangi ; S.T.H. Sherazi ; Shahabuddin Memon
• 关键词：Calixarene ; Immobilization ; Silica resin ; Direct azo dye ; Solid-phase extraction ; Batch-wise sorption
• 刊名：Arabian Journal of Chemistry
• 出版年：January, 2014
• 年：2014
• 卷：7
• 期：1
• 页码：125-131
• 全文大小：1354 K

文摘

The present study demonstrates the adsorption of the direct black-38 (DB-38) azo dye on potential and newly synthesized p-tert-butylcalix[6]arene based silica resin (4). Resin 4 was synthesized via the modification of pure silica 1 as 2 followed by the immobilization of p-tert-butylcalix[6]arene (3) onto modified silica (2). It was characterized by using different analytical techniques such as FT-IR, scanning electron microscopy (SEM) and thermo gravimetric analysis (TGA). The effect of adsorbent dosage, pH and the electrolyte effect on the removal of the DB-38 azo dye were evaluated through batch wise adsorption experiments. Maximum adsorption of 91% was achieved at pH 9.0. The textile wastewater samples were used to ensure the field applicability of the newly synthesized adsorbent 4 for the treatment of dye contaminated effluents. All results regarding the removal of the DB-38 azo dye from the aqueous environment prop up resin 4 as an effective adsorbent and it was found that resin 4 has high adsorption efficiency toward the DB-38 azo dye at a wide range of pH as compared to 1 and 2.