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采用共沉淀法合成了镁铁水滑石(Mg_3Fe-LDHs),并用XRD、DTA等手段对其结构进行了表征。然后将合成样品的焙烧产物(Mg_3Fe-LDO),应用于模拟Cr(VI)废水的处理,对影响Mg_3Fe-LDO吸附Cr(VI)性能的各因素(吸附时间、溶液初始pH值、温度、Cr(VI)浓度等)进行探讨。得到最佳吸附条件:吸附时间为60 min,溶液初始pH值为6,温度为50℃,Cr(VI)浓度为100 mg/L,此时Mg_3Fe-LDO的最大吸附量达到了71.12 mg/g,明显优于传统吸附材料。
Magnesium iron hydrotalcite (Mg 3 Fe-LDHs) was synthesized by co-precipitation method and its structure was characterized by XRD and DTA. The calcined product (Mg_3Fe-LDO) of synthetic samples was applied to the treatment of simulated Cr (VI) wastewater. The influences of various factors such as adsorption time, initial pH value, temperature, Cr (VI) concentration, etc.) to explore. The optimal adsorption conditions were as follows: the adsorption time was 60 min, the initial pH of the solution was 6, the temperature was 50 ℃, and the Cr (VI) concentration was 100 mg / L. At this time, the maximum adsorption capacity of Mg 3 Fe-LDO reached 71.12 mg / g , Significantly better than traditional adsorbent material.