Prakash Kumar B G, Miranda Lima Rose, Velan M
Department of Chemical Engineering, Alagappa College of Technology, Anna University, Chennai 600025, India.
J Hazard Mater. 2005 Nov 11;126(1-3):63-70. doi: 10.1016/j.jhazmat.2005.05.043. Epub 2005 Jul 22.
Hevea brasiliensis or rubberwood tree, as it is commonly known finds limited use once the latex has been tapped. The sawdust of this tree is chosen to ascertain it viability as a precursor for activation. The carbons thus obtained were characterized in terms of iodine, methylene blue number and surface area. The best carbon in each method was utilized to study the adsorption of Bismark Brown, a dye used in the leather industry. Adsorption equilibrium studies were carried out with the synthetic solutions of the dye, at room temperature (298 K). Equilibrium data are fitted with the Langmuir and the Freundlich isotherms models for the system. The effects of contact time, adsorbent dosage and initial dye concentrations on sorption capacity were carried out. Excellent adsorption capacities of 2000 and 1111 mg g(-1) were obtained for steam and chemical followed by steam-activated carbons, respectively. Pilot-plant experimental studies have been performed using packed-bed column with different feed concentrations, flow rates and bed heights, to evaluate sorption of Bismark Brown on steam-activated carbon. Bed depth service time (BDST) design model have been used to analyze the data.
巴西橡胶树，也就是人们通常所说的橡胶木，一旦乳胶被采集后，其用途就十分有限。人们选用这种树的锯末来确定它作为活化前驱体的可行性。如此获得的碳通过碘值、亚甲基蓝值和表面积进行表征。每种方法中得到的最佳碳被用于研究皮革工业中使用的一种染料俾斯麦棕的吸附情况。在室温（298K）下，用该染料的合成溶液进行吸附平衡研究。平衡数据用该体系的朗缪尔等温线模型和弗伦德里希等温线模型进行拟合。研究了接触时间、吸附剂用量和初始染料浓度对吸附容量的影响。蒸汽活化碳和化学活化碳对俾斯麦棕的吸附容量分别达到了出色的2000和1111 mg g(-1) 。使用填充床柱，在不同的进料浓度、流速和床高条件下进行了中试实验研究，以评估蒸汽活化碳对俾斯麦棕的吸附情况。采用床层深度服务时间（BDST）设计模型对数据进行分析。
