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1 实验部分
1.1 原料及仪器
1.2 铁氧体共沉淀废液金属离子实验
Fig. 1 Recovery process flow of spent LIBs

1.3 掺杂有价金属铁氧体臭氧催化降解苯酚实验
Fig. 2 Devices for O3 catalytic degradation of phenol

2 结果与讨论
2.1 Fe/Me摩尔比对于金属回收率的影响及XRD晶型分析
Fig. 3 Influence of Fe/Me molar ratio on metal recovery rate

Fig. 4 XRD patterns of ferrites from different Fe/Me

2Fe2++4Fe3++1/2O2+16OH−→3α−Fe2O3+8H2O | (1) |
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(2) |
2.2 pH值对金属元素回收率的影响
Fig. 5 Influence of pH on metal recovery rate and temperature on Ni recovery rate in various pH
Fig. 5 Influence of pH on metal recovery rate and temperature on Ni recovery rate in various pH

2.3 不同pH条件下温度对金属元素回收率的影响
2.4 锂离子电池废液中有价金属铁氧体共沉积效果
Table 1 Metal concentration of spent LIBs wastewater before and after reaction
Table 1 Metal concentration of spent LIBs wastewater before and after reaction
mg·L-1 | ||||
反应状态 | Li | Mn | Co | Ni |
反应前 | 21.1 | 102.1 | 10.4 | 27.4 |
反应后(pH=9) | 18.2 | 12.5 | 0.8 | 1.3 |
反应后(pH=11) | 16.6 | 0.9 | 0.2 | 0.3 |
2.5 掺杂铁氧体臭氧催化降解苯酚实验
Fig. 6 Degradation curve of phenol by ferrite and its first-order kinetic reaction equation
Fig. 6 Degradation curve of phenol by ferrite and its first-order kinetic reaction equation

Table 2 Doped ferrites dissolving metal concentration after reaction
Table 2 Doped ferrites dissolving metal concentration after reaction
mg·L-1 | |||
Co | Ni | Mn | Fe |
0.001 6 | 0.005 8 | 0.011 6 | 0.248 1 |
Fig. 7 Time-dependent HPLC evolution and degradation pathway of ferrites degrading phenol
Fig. 7 Time-dependent HPLC evolution and degradation pathway of ferrites degrading phenol
