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中国生物工程杂志

CHINA BIOTECHNOLOGY
中国生物工程杂志  2010, Vol. 30 Issue (06): 70-76    DOI: Q93-331
研究报告     
一株高效广谱染料降解细菌的分离鉴定及脱色特性研究
司美茹1,2**,苏涛1,杨革1,2
1.曲阜师范大学生命科学学院 曲阜 273165
2.山东大学微生物技术国家重点实验室 济南 250000
Isolation and Identification of a High-efficiency Dye-degrading Bacteria Strain Xsmr and Its Degradation Characteristics
SI Mei-ru1,2,SU Tao1,YANG Ge1,2
1.College of Life Science, QuFu Normal University, QuFu 273165,China
2.State Key Laboratory of Microbial Technology,Shandong University,JiNan 250000,China
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摘要:

通过梯度驯化,从印染废水长期污染土壤中分离筛选出能以4种不同结构类型的染料(刚果红、美蓝、孔雀绿和活性艳蓝KNR)为唯一碳源的菌株XSMR,根据其形态学特征和生理生化鉴定及16S rDNA序列分析,初步鉴定为无色杆菌属(Achromobacter sp.)的菌株。菌株XSMR对4种染料均具有强的脱色降解能力,且对染料脱色的同时,自身能够生长繁殖,培养24 h 菌体干重超过不加染料的对照。在振荡培养条件下对该菌株的脱色反应条件进行研究,结果表明,当刚果红、美蓝、孔雀绿及活性艳蓝KN-R的初始浓度分别小于200mg/L、200mg/L、150mg/L及150mg/L时,在pH7.5、温度35℃、接种量4%(V/V)条件下,接种菌株XSMR脱色14 h对4种染料的脱色率均可达到98%以上。通过对降解产物的紫外可见光谱分析,进一步证明了菌株XSMR能彻底降解染料。菌株XSMR对染料脱色的机理包括生物降解和菌株吸附两方面。

关键词: 筛选染料生物降解无色杆菌属脱色    
Abstract:

Through gradient acclination, a strain that could use four kinds of dyes (Congo Red , Malachite Green, Methylene Blue, and Reactive Blue) as sole carbon source were screened from dye waste contaminated soil and named as strain XSMR. It was identified as Achomoobacter sp. by its morphological, physiological and biochemical characters, and 16SrDNA sequence analysis. Strain XSMR had strong decoloring capability for four kinds of dyes. Moreover, strain XSMR reproduced and grew while decolorizing dyes. Bacterium dryweight was more than CK after 24h. The results from the study on the decoloring condition of strain XSMR showed that the optimum temperature for decolorization was 35 ℃, optimum pH was 7.5, and optimum inoculating dose(v/v) was 4%. The best decolorization rate could be obtained at the initial concentration with Congo Red , Methylene Blue, Malachite Green, and Reactive Blue less than 200mg/L, 200mg/L,150mg/L, and 150mg/L respectively. Under the optimum conditions, the strain could remove more than 98% of the color of four kinds of dyes in 14 h treatment. The products of four kinds of dyes degraded by XSMR were determined by UV-Visible spectra assay, and they were found that the dyes were completely degraded by XSMR. The mechanism of decolorization of dyes by XSMR includes biodegradation and biosorption.

Key words: Screening    Dye    Biodegradation    Achromobacter sp.    Decolorization
收稿日期: 2010-01-05 出版日期: 2010-06-12
基金资助:

微生物技术国家重点实验室开放基金项目

通讯作者: 司美茹     E-mail: simeiru1016@163.com
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引用本文:

司美茹 苏涛 杨革. 一株高效广谱染料降解细菌的分离鉴定及脱色特性研究[J]. 中国生物工程杂志, 2010, 30(06): 70-76.

CI Mei-Ru, SU Chao, YANG Ge. Isolation and Identification of a High-efficiency Dye-degrading Bacteria Strain Xsmr and Its Degradation Characteristics. China Biotechnology, 2010, 30(06): 70-76.

链接本文:

https://manu60.magtech.com.cn/biotech/CN/Q93-331        https://manu60.magtech.com.cn/biotech/CN/Y2010/V30/I06/70

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