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1 材料与方法
1.1 材料
1.2 方法
1.2.1 污泥活性炭的制备
1.2.2 吸附实验
1.2.3 表征与测试方法
2 结果与讨论
2.1 污泥活性炭表征分析
Fig. 1 SEM images and element analysis of sludge active carbon(AC-1)

Fig. 2 XRD analysis of different material

Table 1 Characteristics of sludge activated carbon
样品名称 | 总比表面积/(m2·g−1) | 微孔比表面积/(m2·g−1) | 总孔容积/(cm3·g−1) | 微孔容积/(cm3·g−1) | 平均孔径/nm |
半成品活性炭 (CAPC) | 12.676 | -5.033 | 0.052 | -0.003 | 16.313 |
商业化活性炭 (CAC) | 864.794 | 541.726 | 0.548 | 0.275 | 2.537 |
0 %锯末活性炭(AC-0) | 368.858 | 242.520 | 0.307 | 0.122 | 3.330 |
1 %锯末活性炭(AC-1) | 588.502 | 333.121 | 0.372 | 0.188 | 2.530 |
2 %锯末活性炭(AC-2) | 571.492 | 386.320 | 0.396 | 0.197 | 2.761 |
3 %锯末活性炭(AC-3) | 564.959 | 431.214 | 0.435 | 0.217 | 3.080 |
Fig. 3 N2 adsorption-desorption isotherms of sludge active carbon(AC-1)

2.2 不同材料吸附亚甲蓝性能比较
Fig. 4 Effects of different materials on methylene blue adsorption

2.3 锯末添加量对污泥活性炭吸附效率的影响
Fig. 5 Effects of sawdust amount on methylene blue adsorption

2.4 初始pH对吸附效果的影响
Fig. 6 Effects of initial pH on methylene blue adsorption

2.5 温度对污泥活性炭吸附性能的影响
Fig. 7 Effects of adsorption temperature on methylene blue adsorption

2.6 初始浓度对污泥活性炭吸附性能的影响
Fig. 8 Effects of initial concentration on methylene blue adsorption

2.7 吸附等温线
Table 2 Fitting result of Langmuir and Freundlich equation
温度/℃ | Langmuir | Freundlich | ||||
Qm/(mg·g−1) | b/(L·mg−1) | R2 | KF | 1/n | R2 | |
25 | 79.33 | 49.02 | 0.974 | 77.83 | 0.7042 | 0.957 |
Fig. 9 Dissolution of Zn2+ of AC-1 at different pH
