Abstract
Base metal smelters may be a source of particulates containing metals of environmental concern released to the atmosphere. Knowledge of the quantitative chemical speciation of particulate releases from base metal smelters will be of value in smelter emission fingerprinting, site-specific risk assessments, predictions of the behaviour of smelter stack particulates released to the environment and in resolving liability issues related to current and historic releases. Accordingly, we have developed an innovative approach comprising bulk chemical analysis, a leaching procedure, X-ray diffraction analysis and scanning electron microscopy/electron probe microanalysis characterisation in a step-wise apportioning procedure to derive the quantitative speciation of particulate samples from the stacks of three copper smelters designated as A, B and C. For the A smelter stack particulates, the major calculated percentages were 29 CuSO4, 20 ZnSO4.H2O, 13 (Cu0.94Zn0.06)2(AsO4)(OH), 11 PbSO4 and four As2O3. For the B smelter stack particulates, the primary calculated percentages were 20 ZnSO4.H2O, 20 PbSO4, 12 CuSO4 and nine As2O3. Finally, we calculated that the C smelter stack particulates mostly comprised 34 ZnSO4.H2O, 19 (Cu0.84Zn0.16)(AsO3OH), 11 PbSO4, 10 As2O3 and nine Zn3(AsO4)2. Between 56% and 67% by weight of the smelter stack particulates, including the As, was soluble in water. For these and other operations, the data and approach may be useful in estimating metals partitioning among water, soil and sediment, as well as predictions of the effects of the stack particulates released to the environment.
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Skeaff, J.M., Thibault, Y. & Hardy, D.J. A new method for the characterisation and quantitative speciation of base metal smelter stack particulates. Environ Monit Assess 177, 165–192 (2011). https://doi.org/10.1007/s10661-010-1627-9
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DOI: https://doi.org/10.1007/s10661-010-1627-9