Neelavathi A, Sekhar K B Chandra, Babu C Ramesh, Jayaveera K N
Department of Chemistry, J.N.T.University, Anantapur-515 001, A.P., India.
J Environ Sci Eng. 2004 Apr;46(2):137-42.
Removal of toxic Cr(VI) in aqueous medium was investigated using activated carbon adsorbents prepared from Simarouba glauca seed shells. The pH effect, Cr(VI) concentration, adsorbent dosage and contact time period were studied in batch experiment. The removal of Cr(VI) was in general most effective at pH range 2.0-4.0 and high Cr(VI) concentrations. Activated carbons are prepared at 80050 degrees C temperature. One is non-impregnated and the remaining three are impregnated with zinc chloride in 1:1,1:2,1:3 ratio. Important characteristics of activated carbons are also investigated. The data for all the adsorbents fit well to the Freundlich adsorption isotherm. The removal of Cr(VI) is around 97% was observed with 1:2 impregnated activated carbon at pH 3.0 where as other adsorbents showed much lower activities.
采用从苦木科植物苦木种子壳制备的活性炭吸附剂，研究了在水介质中去除有毒六价铬（Cr(VI)）的情况。在批量实验中研究了pH值的影响、Cr(VI)浓度、吸附剂用量和接触时间。一般来说，在pH值为2.0 - 4.0的范围内以及高Cr(VI)浓度下，去除Cr(VI)的效果最为显著。活性炭在800±50℃的温度下制备。一种是未浸渍的，其余三种分别以1:1、1:2、1:3的比例用氯化锌浸渍。还研究了活性炭的重要特性。所有吸附剂的数据都很好地符合弗伦德里希吸附等温线。在pH值为3.0时，1:2浸渍的活性炭对Cr(VI)的去除率约为97%，而其他吸附剂的活性则低得多。
