Oliveira Diana Q L, Gonçalves Maraísa, Oliveira Luiz C A, Guilherme Luiz R G
Universidade Federal de Lavras, Depto. de Química, Caixa Postal 3037, CEP 37200.000, Lavras-MG, Brazil.
J Hazard Mater. 2008 Feb 28;151(1):280-4. doi: 10.1016/j.jhazmat.2007.11.001. Epub 2007 Nov 9.
This study evaluated the feasibility of using a solid waste from the leather industry as an adsorbent for removal of Cr(VI) and As(V) from aqueous media. The adsorbent material was characterized by chemical analyses, infrared spectroscopy, and scanning electronic microscopy (SEM) prior to reaction in order to assess its surface properties. Langmuir and Freundlich equations were used for analyzing the experimental data, which showed a better fit to the Langmuir model, thus suggesting a monolayer adsorption process in the surface of the adsorbent. The high amounts of Cr(VI)-133 mg g(-1) and As(V)-26 mg g(-1) adsorbed demonstrates the great potential for using this solid waste from the leather industry as a low-cost alternative to the traditionally used adsorbent materials.
本研究评估了将皮革工业的固体废物用作吸附剂以从水介质中去除六价铬（Cr(VI)）和五价砷（As(V)）的可行性。在反应之前，通过化学分析、红外光谱和扫描电子显微镜（SEM）对吸附剂材料进行了表征，以评估其表面性质。使用朗缪尔（Langmuir）和弗伦德里希（Freundlich）方程分析实验数据，结果表明该数据与朗缪尔模型拟合得更好，这表明在吸附剂表面发生了单层吸附过程。所吸附的大量六价铬（133 mg g⁻¹）和五价砷（26 mg g⁻¹）表明，将这种皮革工业固体废物用作传统吸附剂材料的低成本替代品具有巨大潜力。
