摘要
利用木霉(Trichoderma lhd)菌体作为吸附剂,对水体中的六价铬进行生物吸附,借助傅立叶红外变换光谱和拉曼光谱对六价铬的生物吸附机理进行了探讨。实验条件优化结果表明,温度28℃以及酸性环境条件(pH 1)有利于Cr(Ⅵ)的生物吸附,12 h内,Cr(VⅥ)的生物吸附去除效率达99%。吸附机理实验结果分析表明,相比于对照实验,2 350 cm^(-1)吸收峰的出现为吸附剂表面质子化的氨基如>NH_2^+,NH^+,>C=NH^+ 等基团吸附Cr(Ⅵ)所致。拉曼光谱中吸收峰2 097 cm^(-1)强度显著增强进一步表明,Cr(Ⅵ)的生勿吸附是吸附剂表面氨基基团在起作用。
The Mycelium of Trichoderma LHD was taken as sorbent for the biosorption of Cr （VI） in water. The mechanism of sorption Cr （VI） was investigated simultaneously by suing the Fourier Transform Infrared Spectroscopy and Raman Spectroscopy. The optimized results of experimental conditions showed that the optimum temperature was 28 ℃ and the acidic environmental condition （pH 1） was conducive to the biosorption of Cr （VI）. Moreover, the removal efficiency of Cr （VI） was approximate 99 % within 12 h. The experimental results of adsorption mechanism displayed that the appearance of absorption peak of
2350 cm^-1 was induced by the adsorption of Cr （VI） with the protonated amino on adsorbent surface, such as 〉NH2^＋, NH^＋, 〉C=, NH^＋ - etc. This significant enhancement of intensity for the Raman absorption peak of 2097 cm^-1 further indicated that the groups of amino on the surface of adsorbent played a major role in the biosorption of Cr （VI）.
出处
《激光生物学报》
CAS
CSCD
2010年第3期353-357,共5页
Acta Laser Biology Sinica
基金
湖南省教育厅资助科研项目(08C321)
湖南科技大学博士启动基金项目(E58125)
