Xiao Lei, Feng Luxuan, Chen Xiaofeng, Yao Jinghua, Li Yunyun, Feng Xiujuan
Key Laboratory of Coal Processing and Efficient Utilization of Ministry of Education, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
Mechano Chemistry Research Institute, China University of Mining and Technology, Xuzhou, 221116, Jiangsu, China.
Bull Environ Contam Toxicol. 2025 Feb 22;114(3):35. doi: 10.1007/s00128-024-03986-8.
Cadmium (Cd) pollution of soil is a severe environmental problem. Bioremediation of Cd-contaminated soil is an environmentally friendly and low-cost remediation method. In this work, three Cd-tolerant fungi strains, named L1, L2, and L3, were screened and domesticated. The adsorption characterization and the remediation effect of the three strains were investigated. The results show that the adsorption efficiency (AE) of Cd by the three strains reached 83.6%,73.1% and 57.1%, respectively. Scanning electron microscopy (SEM) revealed that the surface of Cd-tolerant fungus (L1) is rough, with many indents and excellent Cd adsorption sites. The prepared microbial agents reduced the exchangeable Cd content and increased other Cd contents in highly Cd-contaminated soil. In addition, the number of microorganisms and the activities of catalase and urease in the soil were also improved. The screened fungi have the remediation abilities for Cd-contaminated soil. This work aims to investigate the remediation mechanism and effect of Cd-tolerant microorganism on Cd-contaminated soil, and provide a theoretical basis for practical application.
土壤镉（Cd）污染是一个严峻的环境问题。生物修复镉污染土壤是一种环保且低成本的修复方法。在这项工作中，筛选并驯化了三株耐镉真菌菌株，命名为L1、L2和L3。研究了这三株菌株的吸附特性及修复效果。结果表明，这三株菌株对镉的吸附效率（AE）分别达到83.6%、73.1%和57.1%。扫描电子显微镜（SEM）显示，耐镉真菌（L1）表面粗糙，有许多凹陷，是优良的镉吸附位点。制备的微生物菌剂降低了高镉污染土壤中交换态镉的含量，增加了其他镉形态的含量。此外，土壤中的微生物数量以及过氧化氢酶和脲酶的活性也得到了提高。筛选出的真菌对镉污染土壤具有修复能力。这项工作旨在研究耐镉微生物对镉污染土壤的修复机制和效果，为实际应用提供理论依据。
