镉对固定化小球藻除磷效果的影响

采用人工配制污水进行静态模拟实验,研究了镉对被海藻酸钙凝胶包埋固定的小球藻去除磷能力的影响.结果表明:在各光照及pH条件下,镉对固定化小球藻吸收磷的效果随着实验时间的推移而变化,在实验的第一天时影响最大;总体而言,镉抑制了固定化小球藻的除磷能力,但在某些条件下镉反而提高了藻对磷的吸收;固定化处理减弱了镉对小球藻除磷能力的影响.具体的光照、pH值与镉的影响效果的关系尚待进一步探讨.

The effect of cadmium on phosphate removal by immobilized Chlorella

The effect of cadmium on phosphate removal from settled domestic wastewater by Chlorella vulgaris entrapped in cadmium alginate was studied under different light intensities and different pH, and the experiment was employed in laboratory. The result showed that, 1)the effect of cadmium on algal phosphate removal varied from day to day, and peaked in the first day; 2)under some conditions, the content of phosphate removed increased when cadmium was added, however , cadmium inhibited the uptake of phosphate by algae generally; and 3) the treatment of immobilization to algae smoothed the disruption of cadmium. In the next experiment, more attention should be paid to conduct research in the relationship between light intensities/pH and cadmium.