MOE Key Laboratory of Soft Soils and Geoenvironmental Engineering, Department of Civil Engineering, Zhejiang University, Yuhangtang Road 388, Hangzhou, 310058, PR China.
J Hazard Mater. 2010 Jul 15;179(1-3):95-103. doi: 10.1016/j.jhazmat.2010.02.062. Epub 2010 Feb 26.
Cadmium pollution is known to cause severe public health problems. This study is intended to examine the effect of an activated Firmiana Simplex Leaf (FSL) on the removal of Cd(II) from aqueous solution. Results showed that the active Firmiana Simplex Leaf could efficiently remove Cd(II) from wastewater due to the preservation of beneficial groups (amine, carboxyl, and phosphate) at a temperature of 250 degrees C. The adsorbent component, dosage, concentration of the initial solute, and the pH of the solution were all found to have significant effects on Cd(II) adsorption. The kinetic constants were predicted by pseudo-first-order kinetics, and the thermodynamic analysis revealed the endothermic and spontaneous nature of the adsorption. FT-IR and XRD analyses confirmed the strong adsorption between beneficial groups and cadmium ions, and the adsorption capacity was calculated to be 117.786 mg g(-1) according to the Langmuir isotherm.
镉污染已知会对公众健康造成严重问题。本研究旨在考察活性番石榴叶（FSL）对水溶液中 Cd(II)去除的影响。结果表明，活性番石榴叶在 250°C 下由于保留了有益基团（胺、羧基和磷酸基），可有效地从废水中去除 Cd(II)。吸附剂成分、用量、初始溶质浓度和溶液 pH 都对 Cd(II)吸附有显著影响。动力学常数通过拟一级动力学预测，热力学分析表明吸附是吸热和自发的。FT-IR 和 XRD 分析证实了有益基团与镉离子之间的强吸附，根据 Langmuir 等温线计算出吸附容量为 117.786mg g(-1)。
