球形棕囊藻对Pb^(2+)的吸附动力学  

Kinetics of Pb^(2+) biosorption by algae biomass of Phaeocystis globosa

作　　者：黄月华[1] 尹平河[1] 赵玲[1] 黄凤[1] 

机构地区：[1]暨南大学生命科学技术学院,广州510632

出　　处：《环境科学学报》2009年第5期930-933,共4页Acta Scientiae Circumstantiae

基　　金：广东省自然科学基金重点项目(No.04105835);国家自然科学基金(No.40673062)~~

摘　　要：研究了球形棕囊藻对金属离子Pb2+在球形棕囊藻上的生物吸附特性.结果显示,Pb2+在球形棕囊藻上的生物吸附可以分为2个阶段,第1阶段为物理吸附,在10min内快速达到平衡;第2阶段为金属离子向藻内部的迁移,过程缓慢.通过拟合得到了吸附过程的准二级动力学方程,参数k为0.0025g.mg-.1min-1,qe为19.8mg·g-1.吸附等温线结果表明,Pb2+在球形棕囊藻上的生物吸附可以用Langmuir来描述,最大吸附量qmax为20.2mg·g-1.Kinetics and equilitrium isotherm of Pb^2＋ biosorption by algae biomass of Phaeocystis globosa were investigated in this study. The experimental results showed that the process of Pb^2＋ biosorption onto the algae biomass of phaeocystis globosa took place in two stages. The first stage was a physical sorption and reached equilibrium within 10 minutes. The second stage was a slow migration of Pb^2＋ to the interior of the algae biomass. The biosorption kinetics could be described quite well by the pseudo second-order equation （R2 = 0. 999）. The kinetic parameters q, and k were 19.8 mg·g^-1 and 0. 0025 mg·g^-1·min^-1 , respectively. The equilibrium isotherm could be fitted by the Langmuir model. The algae biomass of Phaeocystis globosa demonstrated a maximum Pb^2＋ biosorption capacity of 20.2 mg·g^-1 .

关 键 词：球形棕囊藻 重金属 生物吸附 动力学 PB2+ 

分 类 号：X171[环境科学与工程—环境科学]