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| sample name | spiked value (μg L–1) | before adsorption (μg L–1) | after adsorption (μg L–1) | % removal |
|---|---|---|---|---|
| electronic industrial wastewater | 7.4 ± 5 | 6.95 ± 3 | 93.5 | |
| 2.0 | 8.9 ± 7 | 8.1 ± 8 | 91.0 | |
| 5.0 | 12.9 ± 3 | 12.3 ± 9 | 95.3 | |
| 10.0 | 16.1 ± 4 | 15.7 ± 6 | 97.5 |
