Abstract
This test focuses on the screening and identification of heavy metal zinc adsorption strains in contaminated soil. Four strains with high zinc adsorption capacity are obtained by collecting contaminated soil samples, enrichment cultivation, strain isolation, and determination of adsorption rate. The strains are named ZnA-4, ZnE-3, ZnH-2 and ZnL-2 respectively. ZnH-2 strain boasts a zinc adsorption rate of 48.30%, higher than that of any other strain, followed by ZnL-2 with an adsorption rate of 42.95%. With conventional bacteria identification method, the four strains are preliminarily indentified as Bacillus.spp based on the two aspects of colony morphology & characteristics and physiological & biochemical tests. The functional strains are potential remediation agents for in-situ fixation of contaminated soil.
