Adsorption of Dinitro Butyl Phenol (DNBP) from Aqueous Solutions by Fly Ash
Adsorption of Dinitro Butyl Phenol (DNBP) from Aqueous Solutions by Fly Ash
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DOI：
10.1021/ie070332d
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发表时间：
2007-07
影响因子：
4.2
通讯作者：
Huilong Wang;Wen-Feng Jiang
中科院分区：
文献类型：
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作者：
Huilong Wang;Wen-Feng Jiang
粉煤灰是当地火力发电厂产生的废物，已被收集并转化为低成本和高效的吸附剂。制备的吸附剂进行了表征，并用于从水溶液中去除典型的烷基二硝基苯酚化合物2-仲丁基-4，6-二硝基苯酚（DNBP）。吸附研究包括接触时间，温度，初始溶质浓度，吸附剂剂量，pH值和粒径对DNBP吸收的影响。结果表明，在最佳pH为4.0，使用5g/L的吸附剂，粒径为160 - 200目，平衡时间为120 min时，可获得高吸附容量和足够的去除效率。DNBP的吸附量随温度的升高而增加，表明吸附过程为吸热过程。基于统计模型计算了吸附的热力学参数（如吸附的自由能、焓和熵）。给出了结果的解释。动力学研究
Fly ash, which is a waste generated in local thermal power plants, has been collected and converted to a low-cost and efficient adsorbent. The prepared adsorbent has been characterized and used for the removal of a typical alkyl dinitro phenol compound, 2-sec-butyl-4,6-dinitrophenol (DNBP), from aqueous solution. Adsorption studies include the effect of contact time, temperature, initial solute concentration, adsorbent dosage, pH, and particle size on the uptake of DNBP. The results show that the high adsorption capacity and sufficient removal efficiencies can be achieved at an optimum pH of 4.0, using 5 g/L of adsorbent with a particle size of 160−200 mesh in 120 min of equilibration time. The adsorption of DNBP increased as the temperature increased, which indicated that the process was endothermic in nature. The thermodynamic parameters (such as the free energy, enthalpy, and entropy of adsorption) were calculated based on a statistical model. Interpretation of the results was given. Kinetic studies ha...