Fig. 7. XRD spectra, confirming the bioremediation of heavy metals by the bacterial
mixtures grown in a sand column; XRD pattern of the control sand column (A) and
bioremediated sand column (B). Identified peaks: C, CuCO3; O, otavite (CdCO3); P,
cerussite (PbCO3); Q, quartz (SiO2).