A bench study on lead removal from battery manufacturing wastewater by carbonate precipitation

A residual soluble Pb ≤ 0.2 mg/l has been measured after hydrocerussite precipitation in the range of pH 9–10 and filtration with 0.45 μm filter, at a total carbonate concentration ( C T ) of about 1.5 × 10 −4 M. Filterability and sedimentation were optimized by minimizing the “relative supersaturat...

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Bibliographic Details
Published in:Water research (Oxford) 1996-12, Vol.30 (12), p.3032-3036
Main Authors: Macchi, G., Marani, D., Pagano, M., Bagnuolo, G.
Format: Article
Language:English
Subjects:
Applied sciences
battery wastewater
Exact sciences and technology
hydrocerussite precipitation
Industrial wastewaters
Pollution
sedimentation
treatment
Wastewaters
Water treatment and pollution
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Summary:A residual soluble Pb ≤ 0.2 mg/l has been measured after hydrocerussite precipitation in the range of pH 9–10 and filtration with 0.45 μm filter, at a total carbonate concentration ( C T ) of about 1.5 × 10 −4 M. Filterability and sedimentation were optimized by minimizing the “relative supersaturation” coefficient during precipitation. Pb abatement was implemented in the pH range 9–9.5, following a preliminary precipitation step consisting of a slow, gradual change of pH from 6.8 to 7.8 with 0.1 M NaOH solution. The crystals formed may settle within 24 h, allowing Pb to be recovered as Pb 3(CO 3) 2(OH) 2.
ISSN:0043-1354
1879-2448
DOI:10.1016/S0043-1354(96)00089-9