Exploring multi-metal biosorption by indigenous metal-hyperresistant Enterobacter sp J1 using experimental design methodologies

被引：24

作者：

Lu, Wei-Bin ^{[2
]}

Kao, Wei-Chen ^{[1
]}

Shi, Jun-Ji ^{[1
]}

Chang, Jo-Shu ^{[1
]}

机构：

[1] Natl Cheng Kung Univ, Dept Chem Engn, Tainan 70101, Taiwan

[2] Chung Hwa Univ Med Technol, Dept Cosmet Sci, Tainan, Taiwan

来源：

JOURNAL OF HAZARDOUS MATERIALS | 2008年 / 153卷 / 1-2期

关键词：

multi-metal biosorption; Enterobacter sp; response surface methodology; mixture design; contour-surface plot; triangular three-dimensional surfaces;

D O I：

10.1016/j.jhazmat.2007.08.059

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

A novel experimental design, combining mixture design and response surface methodology (RSM), was developed to investigate the competitive adsorption behavior of lead, copper and cadmium by an indigenous isolate Enterobacter sp. J1 able to tolerate high concentrations of a variety of heavy metals. Using the proposed combinative experimental design, two different experiment designs in a ternary metal biosorption system can be integrated to a succinct experiment and the number of experimental trials was markedly reduced from 38 to 26 by reusing the mutual experimental data. Triangular contour diagrams and triangular three-dimensional surface plots were generated to describe the ternary metal biosorption equilibrium data in mixture design systems. The results show that the preference of metal sorption of Enterobacter sp. J1 decreased in the order of Ph2+ > Cu2+ > Cd2+. The presence of other metals resulted in a competitive effect. The influence of the other two metals in ternary metal biosorption system can be easily determined by comparing the stray distance from the single metal biosorption. The behavior of competitive biosorption was successfully described and predicted using a combined Langmuir-Freundlich model along with new three-dimensional contour-surface plots. (c) 2007 Elsevier B.V. All rights reserved.

引用

页码：372 / 381

页数：10

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