Accumulation of Cu(II) and Pb(II) by biofilms grown on particulate in aquatic systems
作者： Ya‐Bing Huang , Wen‐Hua Wang , An Peng
DOI: 10.1080/10934520009376987
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摘要: Abstract Biofilms are believed to significantly influence the accumulation, transport and transformation of heavy metals. A system bacterium‐ex opolysacchride (EPS)‐kaolinite (BEK) was used as a simulation biofilm‐coated particle discern interaction biofilms with Cu (II) Pb (II). The adsorption for single metal ions in presence two metals interpreted using Freundlich isotherms. distribution coefficients (Ka) were 270 Cu2+ 435 Pb2+, indicating has higher affinity than Where both present, Ka values 413 3.09xl04 showing that competed biofilm binding sites, being favored. Metal influenced by pH. Adsorption capacity increased elevated pH maximums 161.80±29.30 μg/g cell (dry weight) at 5.0 112.30±26.74 ng/g 4.0. With further increase pH, adsorpt...
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