摘要
从空气中分离了一株高效脱色真菌,经初步鉴定为青霉属(Peniciliumsp.).研究了该青霉菌菌体对水溶液中阳离子染料孔雀绿的生物吸附作用.试验考察了染料结构、菌体预处理方法和溶液初始pH值对生物吸附作用的影响.结果表明,当孔雀绿染料质量浓度为50 mg/L时,未处理菌体的吸附量为29.3 mg/g,而经过NaHCO3预处理后,效果最佳,达到35.3 mg/g.反应体系中的pH值对菌体吸附剂吸附染料影响很大,当pH值为5时,其吸附能力最大.吸附平衡试验研究表明真菌对孔雀绿的吸附符合Langmuir和Freundlich模型.其最大吸附量可达555.6 mg/g.吸附动力学可用准二级动力学方程进行描述.
A strain of fungus（Penicilium sp. ） capable of high uptake for dyes was isolated from air to remove the cationic dye malachite green from aqueous solution and the effect of fungal biosorption on dye removal was investigated experimentally, including dye structures, pretreatment methods and initial pH values of the solution. The results showed that the adsorption quantity of untreated and NaHCO3-treated fungal mycelia as biosorbent are 29.3 and 35.3 mg/g if the concentration of the dye malachite green is 50 mg/L, respectively, and the latter has best effect. In the biosorption process the pH value plays an important role, and the maximum adsorbability can be obtained at pH value 5. The Langmuir and Freundlich models are able to describe the biosorption equilibrium of malachite green with the NaHCO3-treated fungal mycelia. The maximum uptake is 555.6 mg/g dry biomass. The dye biosorption process by fungal mycelia follows the pseudo second-order kinetics equation.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2007年第10期1489-1492,共4页
Journal of Northeastern University(Natural Science)
基金
国家自然科学基金资助项目(50174014)
辽宁省自然科学基金资助项目(20042021)
关键词
青霉菌
生物吸附
孔雀绿
吸附动力学
染料
Penicilium sp.
biosorption
malachite green
adsorptive kinetics
dye
