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Atomic percentages of various metal ionic species in electroplating wastewater samples.
| Sample | Cr | Mn | Fe | Ni | Cu | Zn |
|---|---|---|---|---|---|---|
| “S1” (cyanide wastewater) | ND * | ND | 342.95 | 703.85 | 84.69 | 2447.67 |
| “S2” (after alkaline chlorination) | ND | 2.38 | 468.28 | 667.66 | 77.06 | 2175.26 |
* ND: not detected.
