Centro de Tecnología de Recursos Minerales y Cerámica, CONICET La Plata-CICPBA, CC 49, Cno Centenario y 506, 1897 MB Gonnet, Prov Buenos Aires, Argentina.
J Environ Manage. 2011 Oct;92(10):2590-5. doi: 10.1016/j.jenvman.2011.05.031. Epub 2011 Jun 22.
Modified kaolin clays were used as adsorbents for SO(2) gas adsorptions. The clays were heated up to 900 °C previous to acid treatments with 0.5 N sulfuric acid solutions at boiling temperature during different times up to 1440 min. Equilibrium adsorption at 25 °C and 0.1 MPa was carried out by using a volumetric apparatus. The samples were characterized by chemical analysis, X-ray diffraction and infrared analysis. The heating of the clays followed by acid treatment improved the adsorption capacity of the kaolin clays. The presence of amorphous silica and hydroxyl in the final products improved SO(2) adsorption capacity. Better properties for SO(2) adsorption were found in kaolin rich in not well ordered kaolinite clay mineral.
改性高岭土被用作 SO(2)气体吸附剂。这些高岭土在进行酸处理之前，先加热至 900°C，然后用 0.5N 的硫酸溶液在沸腾温度下处理不同时间，最长可达 1440 分钟。在 25°C 和 0.1MPa 下通过体积装置进行平衡吸附。通过化学分析、X 射线衍射和红外分析对样品进行了表征。高岭土的加热和酸处理提高了高岭土的吸附能力。最终产物中无定形二氧化硅和羟基的存在提高了 SO(2)的吸附能力。在富含非有序高岭石粘土矿物的高岭土中，发现了更好的 SO(2)吸附性能。
