Department of Protection and Safety, Atomic Energy Commission of Syria, Damascus, P.O. Box 6091, Syria.
Appl Biochem Biotechnol. 2010 Feb;160(4):976-87. doi: 10.1007/s12010-009-8568-1. Epub 2009 Mar 14.
The removal of metal ions from aqueous solutions by biosorption plays an important role in water pollution control. In this study, dried leaves and branches of poplar trees were studied for removing some toxic elements (cadmium, lead, and uranium) from aqueous solutions. The equilibrium experiments were systematically carried out in a batch process, covering various process parameters that include agitation time, adsorbent size and dosage, initial cadmium, lead and uranium concentration, and pH of the aqueous solution. Adsorption behavior was found to follow Freundlich and Langmuir isotherms. The results have shown that both dried leaves and branches can be effectively used for removing uranium, while only branches were found to remove lead and cadmium completely from the aqueous solution. The maximum biosorption capacity of leaves for uranium was found to be 2.3 mg g(-1) and 1.7 mg g(-1) and 2.1 mg g(-1) for lead and cadmium on branches, respectively. In addition, the studied biomass materials were used in removing lead and cadmium from contaminated water and the method was found to be effective.
生物吸附法从水溶液中去除金属离子在水污染控制中起着重要作用。本研究以杨树的干树叶和树枝为研究对象，用于从水溶液中去除一些有毒元素（镉、铅和铀）。在分批处理中系统地进行了平衡实验，涵盖了各种工艺参数，包括搅拌时间、吸附剂粒径和用量、初始镉、铅和铀浓度以及水溶液的 pH 值。吸附行为符合弗伦德利希和朗缪尔等温线。结果表明，干树叶和树枝都可以有效地用于去除铀，而只有树枝被发现可以完全从水溶液中去除铅和镉。树叶对铀的最大生物吸附容量为 2.3、1.7 和 2.1mg/g，分别为铅和镉在树枝上的吸附容量。此外，研究中使用生物质材料从受污染的水中去除铅和镉，该方法被证明是有效的。
