The interaction of bacterial biofilm and clay minerals provides great potential for heavy metal remediation in contaminated soil, yet, little is known about how heavy metal, clay minerals and their combinations affect the bacterial biofilm performance and heavy metal adsorption. In this study, the response of biofilm development as well as Cd²⁺ adsorption in the presence of Cd²⁺ and montmorillonite has been deciphered. Low concentrations of Cd²⁺ and montmorillonite or their combinations enhanced biofilm formation by increasing polysaccharides proportion in the biofilm matrix, and the maximum adsorption capacity of Cd²⁺ by biofilm was increased by 1.5 times. Furthermore, the immobilization of Cd²⁺ by soil was significantly improved when S14-biofilm was introduced. Such results could gain deeper insight into bacterial survival tactics in the complex systems which makes major contribution to microbial remediation of heavy metal polluted environments.

细菌生物膜和粘土矿物质的相互作用为污染土壤中的重金属修复提供了巨大潜力，然而，关于重金属，粘土矿物质及其组合如何影响细菌生物膜性能和重金属吸附的知之甚少。在这项研究中，已经破解了在Cd ²⁺和蒙脱石存在下生物膜形成以及Cd ²⁺吸附的响应。低浓度的Cd ²⁺和蒙脱土或它们的组合通过增加生物膜基质中多糖的比例来增强生物膜的形成，生物膜对Cd ²⁺的最大吸附能力增加了1.5倍。此外，Cd ²⁺的固定化引入S14生物膜后，土壤对土壤的吸收显着改善。这样的结果可以更深入地了解复杂系统中的细菌生存策略，这对重金属污染环境的微生物修复做出了重要贡献。