REMOVAL AND ASSESSMENT OF TOXICITY OF CU AND FE TO ANABAENA-DOLIOLUM AND CHLORELLA-VULGARIS USING FREE AND IMMOBILIZED CELLS

被引：39

作者：

RAI, LC

MALLICK, N

机构：

[1] Laboratory of Algal Biology, Centre of Advanced Study in Botany, Banaras Hindu University, Varanasi

来源：

WORLD JOURNAL OF MICROBIOLOGY & BIOTECHNOLOGY | 1992年 / 8卷 / 02期

关键词：

ANABAENA-DOLIOLUM; CELL IMMOBILIZATION; CHLORELLA-VULGARIS; METAL TOXICITY; REMOVAL;

D O I：

10.1007/BF01195827

中图分类号：

Q81 [生物工程学（生物技术）]; Q93 [微生物学];

学科分类号：

071005 ; 0836 ; 090102 ; 100705 ;

摘要：

Alginate-immobilized and free cells of Anabaena doliolum and Chlorella vulgaris were compared for their use in the removal and toxicity bioassays of Cu and Fe. A decrease in toxicity with regard to growth and uptake of NO3-and NH4+ was noticed following immobilization of both the organisms. In contrast, immobilized cells had higher uptake rates of Cu and Fe suggesting that immobilization offers protection against metal toxicity. Compared with free cells, the immobilized cells showed greater efficiency for metal removal, even over three repeated cycles, though with a gradual decrease in efficiency in the second and third cycles. This reduction in removal efficiency was, however, more pronounced for Fe with A. doliolum and for Cu with C vulgaris. The ease in harvesting and potential for repeated use makes the immobilized cells good tools for scavenging heavy metals from metal-contaminated environments.

引用

页码：110 / 114

页数：5

共 24 条

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