The negatively charged coordination groups on the structure of these biomolecules, which is the main components of extracellular polymeric substances (EPS), have good adsorption efficiency for heavy metals. In this paper, EPS form Proteiniphilum acetatigenes PSB-W which was extracted by EDTA method, and the effects of pH, EPS dosage, adsorption time and initial metal concentration on the adsorption regularity of Cu2 and Pb2 ions on EPS structure were studied respectively, as well as the adsorption efficacy of EPS on Cu2 and Pb2 heavy metals was also studied. The results showed that the adsorption of Cu2 and Pb2 by EPS was favorable when the pH value was 6. The adsorption equilibrium time of Cu2 and Pb2 by EPS was about 50 min. When EPS concentration was 96.6 mg/L, EPS had the best adsorption effect on Cu2 and Pb2 . The adsorption efficiency of EPS to Pb2 was higher than that of Cu2 . EPS extracted from Proteiniphilum acetatigenes PSB-W can be used in the treatment of heavy metal pollution, which has great significance in the removal of heavy metals from sewage.
Cite this paper
Hu, Q. and Liu, X. (2021). Study on the Adsorption of Heavy Metal by Extracellular Polymeric Substances Extracted from Proteiniphilum acetatigenes PSB-W. Open Access Library Journal, 8, e7228. doi: http://dx.doi.org/10.4236/oalib.1107228.
Aguilera, A., Souza-egipsy, V., San, M.N.P., et al. (2008) Extracellular Matrix Assembly in Extreme Acidic Eukaryotic Biofilms and Their Possible Implications in Heavy Metal Adsorption. Aquatic Toxicology, 88, 257-266.
Tao, Y.-G. and Slater, G.W. (2011) A Simulation Model of Biofilms with Autonomous Cells, 2—Explicit Representation of the Extracellular Polymeric Substance. Macromolecular Theory and Simulations, 20, 571-583.
Chen, J., Yin, C.Q., Jin, J., et al. (2018) Characteristics of Different Molecular Weight EPS Fractions from Mixed Culture Dominated by AnAOB and Their Role in Binding Metal Ions. Environmental Science and Pollution Research, 25, 5491-5500.
Joshi, P.M. and Juwarkar, A.A. (2009) In Vivo Studies to Elucidate the Role of Extracellular Polymeric Substances from Azotobacter in Immobilization of Heavy Metals. Environmental Science & Technology, 43, 5884-5889.
Wang, J., Li, Q., Li, M.M., et al. (2014) Competitive Adsorption of Heavy Metal by Extracellular Polymeric Substances (EPS) Extracted from Sulfate Reducing Bacteria. Bioresource Technology, 163, 374-376.
Pal, A. and Paul, A.K. (2008) Microbial Extracellular Polymeric Substances: Central Elements in Heavy Metal Bioremediation. Indian Journal of Microbiology, 48, 49-64.
Hu, Q. and Gao, X. (2020) Effects of Light on Saccharide Wastewater Treatment and Resource Recovery by Proteiniphilum acetatigenes PSB-W. Open Access Library Journal, 7, e6348. https://doi.org/10.4236/oalib.1106348
Nouha, K., Kumar, R.S. and Tyagi, R.D. (2016) Heavy Metals Removal from Wastewater Using Extracellular Polymeric Substances Produced by Cloacibacterium normanense in Wastewater Sludge Supplemented with Crude Glycerol and Study of Extracellular Polymeric Substances Extraction by Different Methods. Bioresource Technology, 212, 120-129. https://doi.org/10.1016/j.biortech.2016.04.021