Iqbal M, Edyvean R G J
Department of Chemical and Process Engineering, University of Sheffield, Sheffield S1 3JD, UK.
Chemosphere. 2005 Oct;61(4):510-8. doi: 10.1016/j.chemosphere.2005.02.060. Epub 2005 Apr 18.
The potential of loofa sponge discs to immobilize fungal biomass of Phanerochaete chrysosporium (a known biosorbent) was investigated as a low cost biosorbent for the removal of Cd(II) ions from aqueous solution. A comparison of the biosorption of Cd(II) by immobilized and free fungal biomass from 10 to 500 mg l(-1) aqueous solutions showed an increase in uptake of over 19% when the biomass is immobilized (maximum biosorption capacity of 89 and 74 mg Cd(II) g(-1) biomass for immobilized and free biomass respectively at a solution pH of 6). Equilibrium was established within 1h and biosorption was well defined by the Langmuir isotherm model. The immobilized biomass could be regenerated using 50 mM HCl, with up to 99% metal recovery and reused in ten biosorption-desorption cycles without significant loss of capacity. This study suggests that such an immobilized biosorbent system has the potential to be used in the industrial removal/recovery of cadmium and other pollutant metal ions from aqueous solution.
研究了丝瓜海绵圆盘固定已知生物吸附剂黄孢原毛平革菌真菌生物质的潜力，将其作为一种低成本生物吸附剂用于从水溶液中去除镉（II）离子。比较固定化真菌生物质和游离真菌生物质对10至500 mg l(-1)水溶液中镉（II）的生物吸附，结果表明，生物质固定化后对镉（II）的吸收增加了19%以上（在溶液pH值为6时，固定化生物质和游离生物质对镉（II）的最大生物吸附容量分别为89和74 mg Cd(II) g(-1)生物质）。1小时内达到平衡，生物吸附符合朗缪尔等温线模型。固定化生物质可用50 mM盐酸再生，金属回收率高达99%，并可在十个生物吸附-解吸循环中重复使用，而容量无显著损失。本研究表明，这种固定化生物吸附剂系统有潜力用于工业上从水溶液中去除/回收镉及其他污染金属离子。
