硅胶负载二氧化锰吸附重金属的研究

该文以原位合成法制得S-MnO₂吸附剂,并采用XRD、FT-IR、SEM、BET/BJH等方法进行表征。考察了吸附反应时间、吸附剂用量、水浴温度、反应溶液酸碱度对S-MnO₂吸附重金属离子的影响。结果表明,S-MnO₂的吸附效果良好,去除率近100%,尤其是Cu²⁺、Pb²⁺、Zn²⁺等重金属离子都达到了饮用水标准。As⁵⁺在5 min内即可达到吸附平衡且S-MnO₂几乎不受溶液酸碱度的影响,可在大范围pH (2～10)条件下使用。该材料成本低、效率高、使用范围广、固液分离快、无二次污染,在未来的矿山废水处理领域中有着广泛的应用前景。

Adsorption of Heavy Metals on Silica Gel Loaded with Manganese Dioxide

S-MnO₂ adsorbent was synthesized by in-situ method and characterized by XRD, FT-IR, SEM, and BET/BJH. The effects of reaction time, amount of adsorbent, temperature and pH of solution on the adsorption performance of S-MnO₂ were investigated. The results showed that S-MnO₂ with excellent adsorption capacity, the removal efficiency was close to 100%, especially Cu2+, Pb2+, Zn2+, etc, which reached the drinking water standard. It could reach the adsorption equilibrium within 5min for the adsorption of As5+, and S-MnO₂ was hardly affected by the pH of the solution, which could be used in a wide range of pH (2—10). The material has low cost, high efficiency, widely apply, easy to solid-liquid separation and no secondary pollution. S-MnO₂ could be used as a promising adsorbent for the treatment of mine wastewater in the future.