▎ 摘　　要

NOVELTY - Purifying agent includes a modified mixed flocculant and a composite activated carbon filter element. The modified solidified flocculant includes 5-15 pts. wt. sodium hydroxide, 5-15 pts. wt. sodium sulfide, 5-15 pts. wt. polyferric sulfate, 5-15 pts. wt. sodium polystyrene sulfonate, 5-15 pts. wt. potassium ferrocyanide, 5-15 pts. wt. ferric chloride, 5-15 pts. wt. potassium sulfite, 10-20 pts. wt. manganese dioxide, 10-15 pts. wt. pure water. The composite activated carbon filter element includes 35-42 pts. wt. activated carbon powder, 7-21 pts. wt. graphene oxide, 5-21 pts. wt. nano silicon dioxide powder, 2-6 pts. wt. surfactant, 14-40 pts. wt. nano-adsorbent, and purified water (balance). USE - The purifying agent is used in industrial waste water treatment. ADVANTAGE - The purifying agent: ensuring the removing effect of heavy metal thallium in the waste water, and can reach 1 ug/l. DETAILED DESCRIPTION - An INDEPENDENT CLAIM is also included for a purifying method of thallium-polluted water source metal thallium.