Open Access
Table1
Information and use of laboratory equipment
| Index | Instrument and type | Method | Note |
|---|---|---|---|
| 3DEEM | 3DEEM analyzerHitachi F-7000 | — | The scanning speed is 2 400 nm/min. The excitation wavelength  was 200-600 nm, the emission wavelength  was 200-600 nm, and the step size was 5 nm. SigmaPlot software was used for data analysis |
| Grain diameter | Nano-particle analyzerZetasizer Nano ZS90 | — | Particle size measurement range from 2 to 3 000 nm, measurement angle of 90° |
| CODCr | COD spectrophotometerHACH DR/1010COD digestion deviceHACH DRB 200 | Potassium dichromate method | The determination of CODCr was divided into two ranges of 0-150 mg/L and 0-1 500 mg/L according to the concentration |
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