Heavy metal chelating agent is also named as heavy metal ion precipitine agent or heavy metal collection agent. It is widely applied in electroplating, electronic, nonferrous metals, steel smelting, photography laboratory, film laboratory, chemical industry, waste incineration plant and storage battery plant.

HSZTL is developed through special technique. It has strong absorption and ion exchange capacity. It can eliminate turbidity, chromaticity and peculiar smell in water. And it can absorb and exchange harmful heavy metal, such as, chromium, cadmium, nickel, zinc, mercy and iron ion, and organics, such as, phenol, hexachloro-cyclohexane soprocide, DDT, 3 –nitrogen, ammonia nitrogen and etc. Therefore it is reasonable new type filter material in industrial water supply, wastewater treatment and drinking water aspect.

Activated carbon has features of large specific surface area, advanced micro-hole, high mechanical strength, fast absorption speed, high purification degree and long serve life. It is widely applied in chemical, electronic, medical, dyeing, food, drinking water, industrial water aspects.