| 生物合成Cr2O3纳米颗粒 |
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| 引用本文： | 董国文,吴钟海,张丽华,王仁章.生物合成Cr2O3纳米颗粒[J].三明学院学报,2014(4):1-5. |
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| 作者姓名： | 董国文 吴钟海 张丽华 王仁章 |
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| 作者单位： | 三明学院资源与化工学院,福建三明365004 |
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| 基金项目： | 国家自然科学基金（41301346）; 福建省科技厅重点项目（2012Y0061）; 福建省大学生创新计划项目（ZL1125/CS）; 2011洁净煤气化技术协同创新中心项目 |
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| 摘 要： | 微生物还原固定铬对Cr（VI）污染环境修复具有重要意义。筛选获得一株Cr（VI）还原菌株XMCr-6,并对其生物还原固定Cr（VI）进行了研究。动力学实验显示Cr（VI）是先还原,然后吸附固定在细胞表面。XPS分析表明铬在细胞表面主要是以三价的形式存在,高分辨透射电镜结合能谱分析进一步证实是形成Cr2O3纳米颗粒。
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| 关 键 词： | Cr(VI) 生物修复 纳米Cr2O3 废水处理 |
Biosynthesis of Cr_2O_3 Nanoparticles by Strain XMCr-6 |
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| DONG Guo-wen,WU Zhong-hai,ZHANG Li-hua,WANG Ren-zhang.Biosynthesis of Cr_2O_3 Nanoparticles by Strain XMCr-6[J].Journal of Sanming University,2014(4):1-5. |
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| Authors: | DONG Guo-wen WU Zhong-hai ZHANG Li-hua WANG Ren-zhang |
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| Institution: | (College of Resource and Chemical Engineering, Sanming University, Sanming 365004,China ) |
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| Abstract: | A basic understanding related to the immobilization of chromium by bacteria is essential for chromate pollutant remediation in the environment. In this work, the Cr（VI）-immobilization process by strain XMCr-6 was studied.The kinetics experiment result showed that Cr（VI） reduction and Cr（III） immobilization happened asynchronously, the binding sequence of Cr（III） on the cell surface was bound after reduction. X-ray photoelectron spectroscopy（XPS） analysis revealed that the chromium accumulated on bacteria were mostly in Cr（III） states. Scanning electron microscopy（SEM） observations showed that noticeable Cr（Ill） precipitates were accumulated on bacterial surfaces. HRTEM image coupled with energy-dispersive X-ray spectroscopy showed that the Cr2O3 nanoparticles were obtained during the Cr（VI）reduction process. |
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| Keywords: | Cr（VI） Bioremediation Cr2O3Nanoparticles waste treatment |
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