the role of Ferric chloride in the wastewater treatment has a wide range;

as flocculant and precipitant. It can precipitate heavy metals and sulfide,

In addition, the formative iron hydroxide have strong ability of adsorption for oil.

Excellent results in the industrial wastewater.

Has a good ability of flocculation and sedimentation rate higher than that of series of aluminum salt flocculants (such as aluminium sulphate and polyaluminium chloride, etc.), the formed alum flowers are dense.

ferric chloride is efficient cheap flocculant for urban sewage and industrial wastewater treatment, with significant precipitation of heavy metal and sulfide, decolorization, deodorization and oil removal, sterilization, phosphorus removal effect, to reduce the effluent COD and BOD etc.