Study on Adsorption Model and Influencing Factors of Heavy Metal Cu2+ Adsorbed by Magnetic Filler Biofilm

Abstract

The use of biofilm to repair heavy metal pollution in rivers has become a research hotspot in various countries and has attracted more and more attention. The adsorption of heavy metal ions by biofilm depends on many physical and chemical factors. In this paper, the model and its influencing factors of the adsorption of heavy metals by biofilm attached onto the magnetic fillers containing 10% strontium ferrite were studied. The study found that pH is the most important factor that interferes with the adsorption of heavy metal Cu2+ in biofilm. When the pH is 6.2, the adsorption capacity of heavy metal Cu2+ reaches maximum value. In comparison, temperature has no significant effect on the adsorption of Cu2+ by biofilm. When the temperature increases from 5 to 30℃, the adsorption rate of Cu2+ increased by 11.2% accordingly. This study has important theoretical reference value for heavy metal Cu2+ in-situ repairation in rivers or lakes using magnetic filler biofilm method.