Suresh Kumar Reddy K, Kannan Pravin, Al Shoaibi Ahmed, Srinivasakannan C
Chemical Engineering Department, The Petroleum Institute, P.O. Box 2533, Abu Dhabi, UAE E-mail:
Water Sci Technol. 2014;70(10):1633-40. doi: 10.2166/wst.2014.419.
The date palm seed being one of the major forms of biomass produced from the date industry in UAE, its potential to be an appropriate precursor for the preparation of porous carbon utilizing KOH as an activating agent is assessed in the present work. The porous carbon is prepared at an activation temperature of 600 °C, impregnation ratio of 2, and activation duration of 1 hour, in an inert atmosphere using a conventional horizontal furnace. The resultant porous carbon has a Brunauer-Emmett-Teller surface area of 892 m(2)/g, pore volume of 0.45 cm(3)/g, and an average pore diameter of 1.97 nm. This porous carbon was used for adsorption studies at different initial concentrations (100-400 mg/l) and temperatures (30-50 °C). The adsorption isotherm parameters for the Langmuir and Freundlich models were determined using experimental adsorption data and it was found that both Langmuir and Freundlich isotherms described well the adsorption behavior of phenol on porous carbon. The mono layer adsorption capacity was observed to be 333 mg/g, which is highest for the reported date pam seed biomass-based porous carbon. From the data obtained, it was concluded that the removal of phenol from aqueous solution by porous carbon prepared from data palm seed is a low-cost process with an extremely high performance.
海枣种子是阿联酋枣产业产生的主要生物质形式之一，本研究评估了其作为以氢氧化钾为活化剂制备多孔碳合适前驱体的潜力。使用传统卧式炉在惰性气氛中，于600℃的活化温度、2的浸渍比和1小时的活化持续时间下制备多孔碳。所得多孔碳的布鲁诺尔-埃米特-泰勒表面积为892 m²/g，孔体积为0.45 cm³/g，平均孔径为1.97 nm。该多孔碳用于在不同初始浓度（100 - 400 mg/l）和温度（30 - 50℃）下的吸附研究。利用实验吸附数据确定了朗缪尔和弗伦德利希模型的吸附等温线参数，发现朗缪尔和弗伦德利希等温线均能很好地描述苯酚在多孔碳上的吸附行为。单层吸附容量为333 mg/g，这是已报道的基于海枣种子生物质的多孔碳中最高的。根据获得的数据得出结论，由海枣种子制备的多孔碳从水溶液中去除苯酚是一种低成本且性能极高的过程。
