Malkoc Emine, Nuhoglu Yasar, Dundar Murat
Department of Environmental Engineering, Faculty of Engineering, Atatürk University, 25240 Erzurum, Turkey.
J Hazard Mater. 2006 Nov 2;138(1):142-51. doi: 10.1016/j.jhazmat.2006.05.051. Epub 2006 May 26.
The waste pomace of olive oil factory (WPOOF) was tested for its ability to remove chromium(VI) from aqueous solution by batch and column experiments. Various thermodynamic parameters, such as DeltaG degrees , DeltaH degrees and DeltaS degrees have been calculated. The thermodynamics of chromium(VI) ion onto WPOOF system indicates spontaneous and endothermic nature of the process. The ability of WPOOF to adsorb chromium(VI) in a fixed bed column was investigated, as well. The effect of operating parameters such as flow rate and inlet metal ion concentration on the sorption characteristics of WPOOF was investigated. The longest breakthrough time and maximum of Cr(VI) adsorption is obtained at pH 2.0. The total adsorbed quantities, equilibrium uptakes and total removal percents of chromium(VI) related to the effluent volumes were determined by evaluating the breakthrough curves obtained at different flow rates and different inlet chromium(VI) concentrations for adsorbent. The data confirmed that the total amount of sorbed chromium(VI) and equilibrium chromium(VI) uptake decreased with increasing flow rate and increased with increasing inlet chromium(VI) concentration. The Adams-Bohart model were used to analyze the experimental data and the model parameters were evaluated.
通过批次实验和柱实验，对橄榄油厂废果渣（WPOOF）从水溶液中去除六价铬的能力进行了测试。计算了各种热力学参数，如ΔG°、ΔH°和ΔS°。六价铬离子在WPOOF体系上的热力学表明该过程具有自发性和吸热性。还研究了WPOOF在固定床柱中吸附六价铬的能力。研究了流速和入口金属离子浓度等操作参数对WPOOF吸附特性的影响。在pH 2.0时获得最长穿透时间和最大的六价铬吸附量。通过评估在不同流速和不同入口六价铬浓度下吸附剂获得的穿透曲线，确定了与流出物体积相关的六价铬的总吸附量、平衡吸附量和总去除率。数据证实，吸附的六价铬总量和平衡六价铬吸附量随流速增加而降低，随入口六价铬浓度增加而增加。使用亚当斯-博哈特模型分析实验数据并评估模型参数。
