Degradation of Butyl Xanthate Using Persulfate Activated with Iron and Steel Metallurgical Slag

doi:10.12068/j.issn.1005-3026.2024.02.005

Abstract

Abstract:

Butyl xanthate in water was degraded by persulfate activated with iron and steel metallurgical slags， including steel slag， Ti-bearing blast-furnace slag and vanadium tailings. The effects of slag types and dosage， persulfate concentration and initial pH value on the degradation efficiency of butyl xanthate were analyzed. Two-way ANOVA was used to reveal the interaction characteristics between the factors. The results showed that the degradation rate of butyl xanthate increases with the increase of the slag dosage and persulfate concentration. Under the condition of 1 g/L slag， 0.5 mmol/L persulfate， reaction time of 96 h， the degradation rate of butyl xanthate reaches 96.47%， 97.70% and 95.12% with the application of steel slag， Ti-bearing blast-furnace slag and vanadium tailings， respectively. The optimal pH conditions for the above three slags are alkaline， near neutral and acid， respectively. The reactive constituents include non-free radical （¹O₂）， SO₄?^- and HO? with the activation of steel slag. The activation of Ti-bearing blast-furnace slag is dominated by both ¹O₂ and HO?. Nevertheless， the dominant reactive constituent for the activation of vanadium tailings is ¹O₂.

Key words: persulfate, butyl xanthate, steel slag, Ti-bearing blast furnace slag, vanadium tailings

CLC Number:

X 53

Mei-hang LI, Si-yu MIAO, Wei-wei ZHANG, En-zhu HU. Degradation of Butyl Xanthate Using Persulfate Activated with Iron and Steel Metallurgical Slag[J]. Journal of Northeastern University(Natural Science), 2024, 45(2): 187-192.

Figures/Tables 7

Fig. 1 XRD spectra of iron and steel metallurgical slags

Table 1 Chemical composition of iron and steel metallurgical slags （mass fraction）

CaO

Fe₂O₃

SiO₂

MgO

Al₂O₃

TiO₂

41.45

18.29

15.17

11.29

9.95

0.57

21.85

2.95

46.17

5.39

12.65

8.22

1.40

54.45

15.47

1.19

2.06

9.23

Fig. 2 Catalytic degradation and adsorption ofbutyl xanthate by different iron and steel metallurgical slags（a）—S-S：钢渣；（b）—T-S：含钛高炉渣；（c）—V-S：提钒尾渣.

Fig. 3 Effect of iron and steel metallurgical slag dosage on butyl xanthate degradation efficiency

Fig. 4 Effect of persulfate concentration on butyl xanthate degradation efficiency

Fig. 5 Effect of initial pH on butyl xanthate degradation efficiency

Fig. 6 Effect of scavengers on butyl xanthate degradation efficiency

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