Isolation and screening of lead-accumulating microorganisms and their enviro nmental applications
Hao Xia
Guizhou University of Engineering Science
Changlu Chen
Guizhou University of Engineering Science
Wenjie Ma
Guizhou University of Engineering Science
Qing You
Guizhou University of Engineering Science
DOI: https://doi.org/10.59429/pest.v7i4.12449
Keywords: lead-fixing microorganisms; XH3 strain; lead pollution; adsorption capacity; langmuir model
Abstract
This study identified a lead-tolerant microorganism XH3 from soil near lead-zinc mine tailings in Bijie City, Guizhou Province. The strain demonstrated exceptional lead tolerance, achieving a maximum concentration of 5000 mg/L. Adsorption experiments revealed that XH3 reached a peak adsorption capacity of 219 mg/g for Pb²⁺at 350 mg/L, with the adsorption process conforming to the Langmuir isotherm model, indicating single-layer chemical adsorption. These findings suggest the strain holds significant potential for leadcontaminated environment remediation.
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