Removal of Phenolic Pollutants from Water Utilizing Mangifera indica (Mango) Seed Waste and Cement Fixation
Removal of Phenolic Pollutants from Water Utilizing Mangifera indica (Mango) Seed Waste and Cement Fixation
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DOI：
10.1080/01496390903183303
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发表时间：
2009-09
影响因子：
2.8
通讯作者：
A. Bhatnagar;A. Minocha;E. Kumar;M. Sillanpää;Byong-hun Jeon
中科院分区：
文献类型：
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作者：
A. Bhatnagar;A. Minocha;E. Kumar;M. Sillanpää;Byong-hun Jeon
摘要：研究了一种利用表面改性的芒果籽废弃物通过吸附工艺去除水中两种氯酚（2 - 氯酚和2,4 - 二氯酚），然后对负载酚的吸附剂进行水泥固化的方法。本研究的两个主要目的是通过物理化学活化利用芒果籽废弃物开发高效吸附剂，以及通过固化工艺将负载酚的吸附剂以环境友好的方式处置到水泥中。本研究结果表明，改性芒果籽吸附剂对从水中去除氯酚显示出高效的吸附潜力。在25°C时，改性芒果籽吸附剂对2 - 氯酚和2,4 - 二氯酚的最大吸附量分别为40.6和72.3 mg/g。氯酚在芒果籽吸附剂上的吸附动力学数据用准二级动力学模型能更好地描述。吸附研究之后，负载酚的吸附剂被固定在水泥中以进行最终处置。来自固定的负载酚吸附剂的渗滤液中酚浓度低于饮用水标准。本研究结果表明，农业废弃物作为从水和废水中去除酚的最有前景的活性炭前体之一具有潜在用途，并且通过固化工艺将负载酚的吸附剂安全处置到水泥中是可行的。
Abstract A process for the removal of two chlorophenols (2-chlorophenol and 2,4-dichlorophenol) from water using surface modified mango seed waste by adsorption process followed by cement fixation of the phenols-laden adsorbent is investigated. The two main objectives of this study were to develop efficient adsorbent utilizing mango seed waste by physiochemical activation and to an environmentally-friendly disposal of phenols-laden adsorbent into cement by a fixation process. The results of the present study reveal that the modified mango seed adsorbent showed an efficient adsorption potential for chlorophenols removal from water. The maximum adsorption potential of modified mango seed adsorbent for 2-chlorophenol and 2,4-dichlorophenol was 40.6 and 72.3 mg g−1, respectively at 25°C. Adsorption kinetic data of chlorophenols adsorption on mango seed adsorbent could be described more favorably by a pseudo-second-order kinetic model. After the adsorption studies, the phenol-laden adsorbent was immobilized in cement for its ultimate disposal. Leachates from the fixed phenols-laden adsorbent exhibit phenols concentrations lower than the drinking water standards. Results from this study suggest the potential utility of agricultural wastes as one of the most promising activated carbon precursors for phenols removal from water and wastewater and the safe disposal of phenol-laden adsorbent into cement by fixation process.