Heavy metal sorption by microalgae

作者：E. Sandau, P. Sandau, Otto Pulz · 发表于：Acta Biotechnologica · 年份：1996 · DOI：10.1002/abio.370160402 · 被引用次数：147 · 研究领域：Algal biology and biofuel production、Electrochemical sensors and biosensors

Abstract Viable microalgae are known to be able to accumulate heavy metals (bioaccumulation). Against a background of the increasing environmental risks caused by heavy metals, the microalgae Chlorella vulgaris and Spirulina platensis and their potential for the biological removal of heavy metals from aqueous solutions were taken as an example for investigation. Small‐scale cultivation tests (50 1) with Cd‐resistant cells of Chlorella vulgaris have shown that approx. 40% of the added 10 mg Cd/l was removed from the solution within seven days. At this heavy metal concentration sensitive cells died. Non‐viable microalgae are able to eliminate heavy metal ions in a short time by biosorption in uncomplicated systems, without any toxicity problems. Compared with original biomasses, the sorption capacity of microalgal by‐products changes only insignificantly. Their low price makes them economical.