絮凝型生物吸附剂ZL5-2对Cr^(6+)的吸附作用研究  

ADSORPTION ACTION OF FLOC-TYPE BIOSORBENT ZL5-2 ON CHROMIUM CATION

作　　者：李强[1] 张玉臻[1] 陈明[1] 

机构地区：[1]山东大学微生物技术国家重点实验室,山东济南250100

出　　处：《水处理技术》2005年第4期48-49,59,共3页Technology of Water Treatment

基　　金：国家自然科学基金项目(30270046)

摘　　要：研究了细菌A grobacterium.sp产生的絮凝型生物吸附剂ZL5-2对Cr6+的吸附作用。结果表明,ZL5-2对C r6+吸附的最佳pH为0.5～1.5,随着pH增大,吸附作用减弱,pH>3.0后,吸附处于一个低水平的平衡。其他金属离子如N a+、C a2+、M g2+、Zn2+、A l3+、K+对吸附作用的影响不大。该吸附过程符合Langm uir和Freundlich等温吸附方程。60m in时吸附达到平衡,Cr6+吸附量可达到37.3m g/g。被吸附的Cr6+可以被解吸附,解吸率为23.6～37.9%。The adsorption action of floc-type biosorbent ZL5-2 produced by Agrobaclerium sp.on Cr6+ was studied. The results showed that the optimal pH value for the adsorption was 0.5~1.5; as pH values increased, the adsorption action weakened; after pH>3.0, the adsorption is in an equilibrium at low level; the adsorption actions on other metal ions, such as Na+, Ca2+, Mg2+, Zn2+, Al3+ and K+ are not obvious. The adsorption process is in conformity with Langmuir and Freundlich isothermal adsorption equation. When being 60 min, the adsorption reached equilibrium; the Cr6+ adsorption quantity reached to 37.3mg/g. Cr6+ adsorbed could be desorbed; the desorbing rate was 23.6~37.9%.

关 键 词：CR^6+ 生物吸附剂 吸附作用 絮凝 Langmuir 等温吸附方程 Ca^2+ MG^2+ Zn^2+ AL^3+ 最佳pH Na^+ 金属离子 吸附过程 吸附量 解吸附 解吸率 平衡 

分 类 号：X703[环境科学与工程—环境工程] TQ028.15[化学工程]