School of Environment and Architecture, University of Shanghai for Science and Technology, Shanghai, 200093, China.
Environ Sci Pollut Res Int. 2018 Apr;25(10):9840-9848. doi: 10.1007/s11356-018-1335-5. Epub 2018 Jan 25.
Two-step physical activation was used to prepare activated carbon from textile waste jute. Raw material was first carbonized under nitrogen and then activated by CO. Based on yield and pore structure, the optimal carbonization temperature and time were 500 °C and 60 min, respectively. Carbonized sample was next activated. The development of porosity and surface chemistry was highly dependent on activation temperature and time. Activated carbon produced at 800 °C was predominantly microporous while that produced at 900 °C was more mesoporous and macroporous. The shift from microporosity to mesoporosity could be used to produce either microporous or mesoporous carbon just by changing the activation temperature. Activation also changed the surface chemistry and created a more carbonaceous structure. The jute-based activated carbon was mostly powdered in form, slightly acidic and effective in adsorbing both heavy metals and organics.
两步物理活化法用于从纺织废料黄麻中制备活性炭。原料首先在氮气中碳化，然后用 CO 活化。基于产率和孔结构，最佳碳化温度和时间分别为 500°C 和 60 分钟。然后对碳化样品进行活化。孔隙率和表面化学性质的发展高度依赖于活化温度和时间。在 800°C 下生产的活性炭主要是微孔的，而在 900°C 下生产的活性炭则更多是中孔和大孔的。只需改变活化温度，就可以将微孔转化为中孔，从而生产出微孔或中孔碳。活化还改变了表面化学性质并产生了更具碳质的结构。基于黄麻的活性炭大多呈粉末状，略带酸性，对重金属和有机物都有很好的吸附效果。
