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Environmental Science and Pollution Research

, Volume 25, Issue 32, pp 32156–32162 | Cite as

Adsorption of heavy metal tolerance strains to Pb2+ and Cd2+ in wastewater

  • Dajun Li
  • Li Zhou
Research Article
  • 68 Downloads

Abstract

The functional strains with high tolerance to heavy metal Pb2+ and Cd2+ were screened from soil obtained in a heavy metal waste accumulation area. The immobilized biological adsorbent was made by embedding method and used for treatment of wastewater containing heavy metals. The effects of initial concentration of heavy metals, adsorption time, pH value of wastewater, and dosage of adsorbent on adsorption performance were investigated. The study showed (1) the strains tested were Brevibacterium and their maximum tolerable concentrations for Pb2+ and Cd2+ were 2200 and 700 mg/L, respectively; (2) the maximum adsorption rate for Pb2+ and Cd2+ was 87.77% and 57.50% respectively when the dosage of adsorbent was 10 g/L and the pH value of wastewater was 6; (3) Pb2+ and Cd2+ could be adsorbed in the equilibrium solution for 40 min and the maximum adsorption capacity reached 114.36 mg/g and 82.12 mg/g, respectively; and (4) when the initial pH value of the wastewater was 5–7, the adsorption rate decreased with the increase of the concentration, and the initial concentration of Pb2+ had a greater effect on the adsorption rate than Cd2+. Langmuir and Freundlich equation showed that the adsorption of Pb2+ and Cd2+ was mainly on the surface of monolayer. And the pseudo-second-order kinetic equation indicates that Cd2+ has a relatively greater adsorption rate than Pb2+ does.

Keywords

Tolerant strain Embedding method Immobilized biological adsorbent Heavy metal wastewater Adsorbent 

Notes

Funding information

This work was financially supported by the Hunan province Natural Science Foundation of China (no. 2015JJ5026) and the Scientific Research Project of the Education Department of Hunan Province (no. 14C0317) and the Project of Science and Technology Development of Hengyang City of China (no. 2015KJ31).

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Copyright information

© Springer-Verlag GmbH Germany, part of Springer Nature 2018

Authors and Affiliations

  1. 1.School of Safety and Environmental EngineeringHunan Institute of TechnologyHengyangChina
  2. 2.Engineering Training CenterHunan Institute of TechnologyHengyangChina

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