| abstract |
The present application belongs to the field of environmental microorganisms and wastewater treatment, and in particular relates to an extracellular polymer and a preparation method and application thereof. The present application provides a method for preparing an extracellular polymer, comprising: adding anions and heavy metal ions into a suspension of Alcaligenes faecalis, inducing culture, and collecting the extracellular polymer secreted by the Alcaligenes faecalis; wherein, The anion is selected from one or more of nitrate ion, chloride ion and sulfate ion. The preparation method of the present application is simple to operate and environmentally friendly. It can be seen from the analysis and test of EPS components that after induction by anions and heavy metal ions, the composition ratio of the extracellular polymer is correspondingly changed, and the heavy metal adsorption performance is greatly improved, effectively solving the existing problems. The technical problem of poor adsorption performance of heavy metal adsorbents. |