羟基镁铝复合物对于水体中镉的去除研究

Removel researching on cadmium of water by formation compound Mg-Al hydroxides

近年来,由于受到各种工业废水和固体废弃物的影响,使得水体中的重金属含量不断上升,镉污染就是受关注度较高的一种重金属污染,居民若长期食用含镉稻米或含镉水,会引发骨痛病,严重时还会危害人体生命健康。羟基镁铝复合物是在强化混凝过程中形成的,是一种较好的复合材料,能够有效去除水体中的镉。本次主要研究这种材料对于Cd离子的去除效果,可以得出如下结论:pH、混凝剂Al13是较关键的影响因素,这些因素均影响着羟基镁铝复合物的形成情况以及其对于Cd离子的去除效果。通过一些表征说明,镁铝复合物的形态呈无定形,比表面积较大,成分也较复杂,并且在一定pH保证下,聚合度较高的Al13形成复合物的颗粒较大,对于Cd离子的去除起到积极的促进作用。

In recent years, due to the influence of all kinds of industrial wastewater and solid waste, makes the rising content of heavy metals in water body, the extent of attention put on cadmium pollution is higher a kind of heavy metal pollution, cadmium can cause bone pain disease, if residents long - term edible contain rice or water containing cadmium, serious when still can endanger human body health. The compound Mg - Al hydroxides can be formed in the process of coagulation, is a kind of good composite materials, can remove the cadmium in water effectively. In this researching, we mainly use this material to study its effectiveness on removing cadmium, draws a conclusion as below： pH and coagulant Al13 is the most crucial factors, these factors affect the formation of compound Mg -A1 hydroxides and its removal efficiency for cadmium. According to some characteristics, it shows that the form of Mg - Al composite was amorphous, with a huge surface area, and the composition is relatively complex, and under a certain range of pH, high degree of polymerization of Al13 contains larger particles, do have more positive facilitation on removing polluted cadmium.