一株耐镉真菌的鉴定及其吸附性研究

Identification and Biosorption Characteristics of a Cadmium Resistant Fungus

目的:以采于个旧市老厂尾矿区周边土壤中筛选出的一株耐镉菌株(编号:IS0675-1)为试验材料,对该菌株进行初步鉴定和吸附性研究。方法:采用形态学观察、系统发育学分析对该菌株进行初步鉴定,并探究菌株在温度、重金属浓度、菌量、pH梯度下对重金属的吸附特性。结果:耐镉菌株(IS0675-1)初步鉴定属于枝孢属(Cladosporium),温度为40℃,pH = 6,Cd2+浓度为50 mg/L,菌量0.3 g时IS0675-1菌株吸附重金属镉(Cd2+)的整体效果最佳。

Objective: A cadmium tolerant strain (IS0675-1) was isolated from the surrounding soil of Laochang tailings area in Gejiu City. The strain was preliminarily identified and its adsorption capacity was studied. Methods: Morphological observation and phylogenetic analysis were used to preliminarily identify the strain, and to explore the adsorption characteristics of the strain under temperature, heavy metal concentration, bacterial biomass and pH gradient. Results: The results showed that the cadmium tolerant strain (IS0675-1) belonged to Cladosporium. When the temperature was 40˚C, pH = 6, the concentration of Cd2+ was 50 mg/L, and the amount of strain was 0.3 g, the overall adsorption effect of IS0675-1 was the best.