Selvi K, Pattabhi S, Kadirvelu K
Department of Environmental Sciences, PSG College of Arts and Science, Coimbatore, Tamil Nadu, India.
Bioresour Technol. 2001 Oct;80(1):87-9. doi: 10.1016/s0960-8524(01)00068-2.
Activated carbon (AC) prepared from coconut tree sawdust was used as an adsorbent for the removal of Cr(VI) from aqueous solution. Batch mode adsorption studies were carried out by varying agitation time, initial Cr(VI) concentration, carbon concentration and pH. Langmuir and Freundlich adsorption isotherms were applied to model the adsorption data. Adsorption capacity was calculated from the Langmuir isotherm and was 3.46 mg/g at an initial pH of 3.0 for the particle size 125-250 microm. The adsorption of Cr(VI) was pH dependent and maximum removal was observed in the acidic pH range. Desorption studies were carried out using 0.01-1 M NaOH solutions.
由椰树木屑制备的活性炭（AC）被用作吸附剂，用于从水溶液中去除六价铬（Cr(VI)）。通过改变搅拌时间、初始Cr(VI)浓度、碳浓度和pH值进行了批量模式吸附研究。应用朗缪尔（Langmuir）和弗伦德利希（Freundlich）吸附等温线对吸附数据进行建模。根据朗缪尔等温线计算出吸附容量，对于粒径为125 - 250微米的颗粒，在初始pH值为3.0时吸附容量为3.46毫克/克。Cr(VI)的吸附取决于pH值，在酸性pH范围内观察到最大去除率。使用0.01 - 1 M的氢氧化钠溶液进行了解吸研究。
