摘要
在离体条件下,研究了外生菌根真菌红绒盖牛肝菌(Xerocomus chrysenteron)菌丝对Cu(Ⅱ)和Cd(Ⅱ)生物吸附的影响因子,考察了X.chrysenteron菌丝对Cu(Ⅱ)和Cd(Ⅱ)的吸附能力、去除率和平衡吸附量在不同初始质量浓度和不同温度下所受影响,并采用Freundlich和Langmuir线性化吸附等温线模型拟合X.chrysenteron菌丝的生物吸附热力学特性.结果表明:当菌丝的质量浓度为10 g/L,30℃时,X.chrysenteron非活性菌丝对Cu(Ⅱ)和Cd(Ⅱ)的最佳吸附量分别为47.11和11.72 mg/g(以菌丝干质量计);X.chrysenteron非活性菌丝对Cu(Ⅱ)和Cd(Ⅱ)的吸附能力、去除率、平衡吸附量均优于活性菌丝;X.chrysenteron菌丝对Cu(Ⅱ)和Cd(Ⅱ)的吸附能力随其初始质量浓度的增加而增大,去除率随其初始质量浓度的增大而分别呈指数下降和线性下降;30℃时X.chrysenteron菌丝对Cu(Ⅱ)和Cd(Ⅱ)的吸附能力、去除率、平衡吸附量均比25℃时大.
Xerocomus chrysenteron mycelium （XCM） was grown in media to measure the influence of temperature, initial Cu（ Ⅱ ） and Cd（ Ⅱ ） mass concentrations and other impact factors on XCM biosorption. In addition, the characteristics of biosorption thermodynamics were fitted by the Freundlich and Langmuir linear isotherm models. The results showed that the maximum equilibrium level of biosorption （ELB） was reached at an initial XCM mass concentration of 10 g/L at 30℃ ; the levels were 47.11 mg/g dry weight and 11.72 mg/g dry weight with Cu（ Ⅱ ） and Cd（Ⅱ）, respectively, by non-active XCM （NXCM）. The biosorption capacity, biosorption rate and ELB of NXCM were better than those of active XCM. The biosorption capacity of XCM to Cu（ Ⅱ ） and Cd（ Ⅱ） increased, however, the biosorption rate decreased exponentially for Cu（ Ⅱ ） and linearly for Cd（ Ⅱ ） with their initial concentrations increasing. Moreover, the biosorption capacity, biosorption rate and ELB of XCM were higher at 30℃ than at 25℃ .
出处
《环境科学研究》
EI
CAS
CSCD
北大核心
2009年第11期1334-1340,共7页
Research of Environmental Sciences
基金
国家自然科学基金项目(20777004)
关键词
外生菌根真菌
生物吸附
菌丝
铜
镉
ectoycorrhizal fungi
biosorption
mycelium
copper
cadmium
