Li Z Y, Li Y G, Guo S Y, Li L, Zhang S L
School of Food & Biological Engineering, South China University of Technology, Guangzhou.
Sheng Wu Gong Cheng Xue Bao. 2000 Jan;16(1):108-12.
Some factors of Cr(III) bioaccumulation on Spirulina platensis were studied in detail. It was found that the bioaccumulation of Cr(III) on Spirulina platensis involved two steps: rapid adsorption and slow absorption. Chromic(III) compounds with weaker chemical bond had higher bioaccumulation efficiency. Under the same algal cell concentration, Cr(III) bioaccumulation rosed up with Cr(III) concentration. On the other hand, with Cr(III) concentration not changed, the total bioaccumulation of Cr(III) on Spirulina platensis increased with algal cell concentration, but the Cr(III) bioaccumulation on unit algae reduced. The study also showed that Spirulina platensis powder could bioaccumulate more Cr(III) than fresh Spirulina platensis, pH is a quite important factor and more suitable pH for Cr(III) bioaccumulation is 7. It was also proved that Cr(III) bioaccumulation benefited from the increase of temperature and light intensity. Cations had either stimulation or inhibition effects on the Cr(III) bioaccumulation on Spirulina platensis.
详细研究了钝顶螺旋藻对Cr(III)的生物累积的一些影响因素。发现钝顶螺旋藻对Cr(III)的生物累积涉及两个步骤：快速吸附和缓慢吸收。化学键较弱的铬(III)化合物具有较高的生物累积效率。在相同藻细胞浓度下，Cr(III)的生物累积量随Cr(III)浓度的增加而增加。另一方面，在Cr(III)浓度不变的情况下，钝顶螺旋藻对Cr(III)的总生物累积量随藻细胞浓度的增加而增加，但单位藻类对Cr(III)的生物累积量减少。研究还表明，钝顶螺旋藻干粉比新鲜钝顶螺旋藻能累积更多的Cr(III)，pH是一个相当重要的因素，更适合Cr(III)生物累积的pH为7。还证明了Cr(III)的生物累积受益于温度和光照强度的增加。阳离子对钝顶螺旋藻对Cr(III)的生物累积有促进或抑制作用。
