Removal of Chromium (VI) from Tannery Effluent Using Bio-Char of <i>Phoenix reclinata</i>Seeds

• 作者: Caroline Nakiguli Emmanuel Ntambi Joseph Katenta Paul Mukasa
• 来源期刊: 绿色与可持续化学(英文)
• 学科: 数学
• 关键词: Phoenix reclinata Chromium (VI) Tannery Effluent Adsorption
• 年，卷（期）: 2020,（3）
• 页码范围: 91-107
• 页数: 17页
• 分类号: O17

摘要

The potential of the Senegal date palm (</span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"><i></span></span></span><span><span><i><span style="font-family:""><span style="font-family:Verdana;">Phoenix </span><span style="font-family:Verdana;">reclinata</span></span></i></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><i><span style="font-family:Verdana;"></i></span></i></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;">) seed bio-char to remove chromium (VI) ions from aqueous solutions by adsorption was investigated. Adsorption experiments were performed on the tannery effluent and standard aqueous solutions of chromium (VI) for varying adsorbent doses, contact times, pH, temperatures, and interfering anionic ions by batch mode. </span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"><i></span></span></span><span><span><i><span style="font-family:""><span style="font-family:Verdana;">Phoenix </span><span style="font-family:Verdana;">reclinata</span></span></i></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><i><span style="font-family:Verdana;"></i></span></i></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> seeds (PRS) bio-char was used in the investigation and the residual chromium (VI) was determined using the atomic absorption spectrophotometer (AAS). Results showed that the bio-char removed up to 86% of chromium (VI) ions in the effluent at pH 2. The highest percentage adsorption registered was 97% in an aqueous solution of chromium (VI) at pH 1 and this dropped to less than 10% at pH greater than 2. A general increase in adsorption with</span></span></span><span style="font-family:Verdana;"><span style="font-family:Verdana;"><span style="font-family:Verdana;"> the</sp