Department of Occupational Safety and Health, Chung Hwa University of Medical Technology, Tainan 717, Taiwan, ROC.
Pol J Microbiol. 2010;59(1):37-44.
Our aim was to investigate the biosorption of Pb2+, Hg2+, Cd2 from aqueous solution by Aspergillus terreus (both free and immobilized on loofa sponge discs). Our results show that the adsorption capacity of fungal biomass on loofa sponge (FBLS) is superior to free fungal biomass (FFB). The adsorption selectivity by FBLS was in the order Pb2+>Hg2+>Cd2+. The maximum metal ions adsorbed was 247.2, 37.7, 23.8 mg/g FBLS for Pb2+, Hg2+ and Cd2+, respectively. Metal uptake by FBLS was affected by the pH of the metal solution, but independent of temperature (10-50 degrees C). The Langmuir model was more suitable than the Freundlich model to describe the biosorption process of FBLS. The regenerated FBLS was found to be effective for repeated use for five cycles without significant loss in adsorption capacity. This research demonstrates that FBLS possesses excellent capacity for Pb2+ biosorption from aqueous solution and industrial wastewaters.
我们的目的是研究土曲霉（游离和固定在丝瓜络海绵片上）从水溶液中吸附 Pb2+、Hg2+、Cd2+。结果表明，真菌生物质在丝瓜络上的吸附能力（FBLS）优于游离真菌生物质（FFB）。FBLS 的吸附选择性顺序为 Pb2+>Hg2+>Cd2+。FBLS 吸附的最大金属离子量分别为 247.2、37.7、23.8 mg/g FBLS 用于 Pb2+、Hg2+和 Cd2+。FBLS 对金属溶液 pH 的影响，但不受温度（10-50°C）的影响。Langmuir 模型比 Freundlich 模型更适合描述 FBLS 的吸附过程。再生 FBLS 被发现可有效重复使用五轮，而吸附容量无明显损失。这项研究表明，FBLS 具有从水溶液和工业废水中吸附 Pb2+的优异能力。
