... adsorbent:Diatomite is aquatic plant diatomaceous debris sediments, its is very tiny, the size is about 10 u - 30 u. Due ... of microspore, non-crystalline SiO2. In addition, it also has little Al2O3,Fe2O3,CaO,MgO,K2O,Na2O,P2O5 and other organic ... 11~15 times of itself3.It can absorb the positive charge very good, it is widely used in waste water treatment and ...