Results confirmed that gradual increase of the applied metals produced generations with high metal resistance range that can be efficiently used in decontamination pur-
poses. These results are in agreement and supported by other studies. For example a Cd-resistant Stenotrophomonas sp. showed resistance to Se (Antonioli et al. 2007)
and Cu . a Cd-resistant Providencia sp. showed very high resistance (1,000–1,500 mg/l) to Cd,