... who precipitate have fast.3,Suitable PH value range wide( 5-9), and hydrogen ion index and alkali degree of water ... temperature is low, can still keep the steady sediment result .5,Alkaline degree salt, molysite high than other aluminum, corrode to ... %:3.5 ~ 5.03.5 ~ 5.0As%:0.00020.0002Pb%:0.0010.001Cd%:0.000020.00002Hg%:0.0000010.000001Cr+6%:0.00050.0005 spray drying PAC ...