The biosorption capability of bacterial isolates was assayed as above; the biosorption of metal ions was measured by Inductively Coupled Plasma-Optical Emission Spectroscopy (ICP-OES optima 8300, Perkin Elmer, Massachusetts, USA). The ICP-OES was calibrated with standard working metal solutions and blank as above to set limits of detection (10–1000 ppm). The emission lines used for the analysis were 327.393 nm, 228.802 nm, and 340.458 nm for copper, cadmium, and lead, respectively, under Argon plasma with the concentric nebulizer. The residual metal concentration was deduced from internal standard curve produced from standardisation before running the samples and culture free control [21 (link)].
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