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WU Qingru, WANG Shuxiao, HUI Mulin. Mercury flow during waste acid disposal processes[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 4965-4970. doi: 10.12030/j.cjee.201612084
Citation: WU Qingru, WANG Shuxiao, HUI Mulin. Mercury flow during waste acid disposal processes[J]. Chinese Journal of Environmental Engineering, 2017, 11(9): 4965-4970. doi: 10.12030/j.cjee.201612084
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Mercury flow during waste acid disposal processes

  • 1.

    State Key Joint Laboratory of Environmental Simulation and Pollution Control, School of Environment, Tsinghua University, Beijing 100084, China

  • 2.

    State Environmental Protection Key Laboratory of Sources and Control of Air Pollution Complex, Beijing 100084, China

  • Received Date: 02/02/2017
    Accepted Date: 13/12/2016
    Available Online: 26/08/2017
    Fund Project:
  • Waste acid is the dominant Hg-containing byproduct of nonferrous metals production processes. The mercury pollution control during the waste acid disposal processes directly impacts aquatic mercury release. This study conducted a mercury flow investigation in the waste acid disposal processes of six nonferrous metal smelters. Our study found that mercury concentrations in the waste acid were in the range of 0.3 to 90 μg·mL-1. The mercury concentrations in the waste acid slags were from 73 to 26 354 μg·g-1. The mercury concentrations in the sulfide slag of zinc smelter 1 and copper smelter 1 were 404 218 μg·g-1 and 10 972 μg·g-1, respectively. In generaly, mercury concentrations in the desulfurization slags were much lower than those in the waste acid slag and the sulfide slag. During the waste acid disposal processes, most mercury was released to the above slags. The mercury removal efficiencies during the waste acid disposal processes ranged from 72.9% to 99.9%. Compared to the lime neutralization method and the lime iron salt method, the vulcanization method removed mercury from low-mercury waste acid more stably. Mercury concentrations in the discharge water samples ranged from 0.006 to 0.065 μg·mL-1, some of which exceeded the emission standards.
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Mercury flow during waste acid disposal processes

  • Received Date: 02/02/2017
  • Accepted Date: 13/12/2016
  • Available Online: 26/08/2017
Fund Project:

Abstract: Waste acid is the dominant Hg-containing byproduct of nonferrous metals production processes. The mercury pollution control during the waste acid disposal processes directly impacts aquatic mercury release. This study conducted a mercury flow investigation in the waste acid disposal processes of six nonferrous metal smelters. Our study found that mercury concentrations in the waste acid were in the range of 0.3 to 90 μg·mL-1. The mercury concentrations in the waste acid slags were from 73 to 26 354 μg·g-1. The mercury concentrations in the sulfide slag of zinc smelter 1 and copper smelter 1 were 404 218 μg·g-1 and 10 972 μg·g-1, respectively. In generaly, mercury concentrations in the desulfurization slags were much lower than those in the waste acid slag and the sulfide slag. During the waste acid disposal processes, most mercury was released to the above slags. The mercury removal efficiencies during the waste acid disposal processes ranged from 72.9% to 99.9%. Compared to the lime neutralization method and the lime iron salt method, the vulcanization method removed mercury from low-mercury waste acid more stably. Mercury concentrations in the discharge water samples ranged from 0.006 to 0.065 μg·mL-1, some of which exceeded the emission standards.

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