Doshi Hiren, Ray Arabinda, Kothari I L
Department of Chemistry, Sardar Patel University, Gujarat, India.
Int J Phytoremediation. 2008 Jul-Aug;10:264-77. doi: 10.1080/15226510802096028.
A dead dried alga, Chlorella sp., was used for the uptake of Cr+3, Cr2O7(-2), Cu+2, and Ni+2 from the aqueous solutions of these metal ions. The equilibrium data were fitted using the Langmuir and Freundlich isotherm model and the maximum uptakes for Cr+3, Cr2O7(-2), Ni+2, and Cu+2 were 98, 104, 108, and 183 mg/g, respectively. The Freundlich model, in comparison to the Langmuir model, better represented the sorption process. The kinetics of metal ions uptake by Chlorella sp. was best described by a pseudo-second order rate equation. Infrared spectroscopic data were employed to identify the site(s) of bonding in Chlorella sp. A scanning electron microscopic (SEM) study of pure dead Chlorella sp. and the species treated with different metal ions provided an idea of the extent of metal uptake by this species. The dead Chlorella sp took up maximum Cu(II). The size of the cell of the metal-treated Chlorella sp. obtained from SEM data is in agreement with the extent of metal uptake.
一种死亡的干燥藻类小球藻（Chlorella sp.）被用于从这些金属离子的水溶液中摄取Cr+3、Cr2O7(-2)、Cu+2和Ni+2。使用朗缪尔（Langmuir）和弗伦德利希（Freundlich）等温线模型拟合平衡数据，Cr+3、Cr2O7(-2)、Ni+2和Cu+2的最大摄取量分别为98、104、108和183 mg/g。与朗缪尔模型相比，弗伦德利希模型能更好地描述吸附过程。小球藻摄取金属离子的动力学最好用准二级速率方程来描述。利用红外光谱数据确定小球藻中的键合位点。对纯死亡小球藻和用不同金属离子处理后的小球藻进行扫描电子显微镜（SEM）研究，了解了该物种摄取金属的程度。死亡的小球藻摄取的Cu(II)最多。从SEM数据获得的经金属处理的小球藻的细胞大小与金属摄取程度一致。
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