Isolation of Cu2+ tolerant bacteria used in electroplating wastewater treatment and their biosorption performance
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(State Key Laboratory of Urban Water Resource and Environment(Harbin Institute of Technology), Harbin 150090, China)

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X52

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    Abstract:

    With the improvement of urban planning, surface processing industrial parks are continuous built in China.Due to its complex water quality and abundant existence of heavy metals, the traditional biological treatment unit exposed serious threaten from the existed heavy metals.Thus, the most common cation in electroplating wastewater, Cu2+, was chosen as object and the tolerant bacteria were isolated for enhancing its bulk removal.Two bacteria strains that have strong tolerance ability to Cu2+ were isolated and named as L2 and L3, and the effect of adsorption time, pH, temperature and initial concentration on Cu2+ removal were investigated. Results showed L2 and L3 have a high Cu2+ activity both in LB medium and wastewater medium, and the adsorption of Cu2+ could be achieved in a short time, with an optimal pH of 6.0 and temperature of 28℃, respectively.Under the optimal condition, the maximum adsorption ability was 34.15 mg/g Cu2+ for L2 and 45.68 mg/g for L3. A fast and efficient removal of Cu2+ can be realized, which is anticipated to be used in the actual electroplating wastewater treatment.

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History
  • Received:January 12,2016
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  • Online: July 11,2016
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