... colorless viscous, easy soluble in water, decomposes when temperature exceeds 120 °C. There is a positive group (-CONH2) in polyacrylamide ... anionic polyacrylamide powder:(1) Industrial waste water treatment:For the neutral or alkaline waste water with pH value of 7-14, ... , it has the best treating effect, such as the waste water from iron industry, electroplating factory, metallurgical industry, coal ...