Fok Ying Tung Graduate School, Hong Kong University of Science and Technology, Hong Kong Special Administrative Region.
Chemical and Biomolecular Engineering Department, Hong Kong University of Science and Technology, Hong Kong Special Administrative Region.
J Hazard Mater. 2014 May 30;273:118-23. doi: 10.1016/j.jhazmat.2014.03.037. Epub 2014 Mar 28.
Cadmium is a highly toxic heavy metal even at a trace level. In this study, a novel material derived from waste PCBs has been applied as an adsorbent to remove cadmium ions from aqueous solutions. The effects of various factors including contact time, initial cadmium ion concentration, pH and adsorbent dosage have been evaluated. The maximum uptake capacity of the newly derived material for cadmium ions has reached 2.1mmol/g at an initial pH 4. This value shows that this material can effectively remove cadmium ions from effluent. The equilibrium isotherm has been analyzed using several isotherm equations and is best described by the Redlich-Peterson model. Furthermore, different commercial adsorbent resins have been studied for comparison purposes. The results further confirm that this activated material is highly competitive with its commercial counterparts.
镉是一种剧毒重金属，即使在痕量水平下也是如此。在这项研究中，一种源自废弃 PCB 的新型材料被用作吸附剂，从水溶液中去除镉离子。评估了各种因素的影响，包括接触时间、初始镉离子浓度、pH 值和吸附剂用量。在初始 pH 值为 4 的条件下，新衍生材料对镉离子的最大吸附容量达到 2.1mmol/g。这表明该材料可以有效地从废水中去除镉离子。使用几种等温方程对平衡等温线进行了分析，最佳描述模型为 Redlich-Peterson 模型。此外，还研究了几种商业吸附树脂作为比较。结果进一步证实，这种活化材料与商业同类产品相比具有很强的竞争力。
