The invention belongs to the technical field of heavy
metal wastewater treatment, and in particular relates to
cyanuric acid-based heavy
metal chelating flocculant and a preparation method thereof. In the method,
cyanuric acid is adopted as a basic framework; and
polyamine is connected to a molecule through
epoxy chloropropane, and reacts with
carbon disulfide in an alkaline condition to prepare the heavy
metal chelating flocculant of which the molecule contains a plurality of branches and a plurality of dithio
formate functional groups. The method overcomes the defects that the conventional monofunctional flocculant has small flocculating body, and poor
precipitation performance, and when polymeric chelant chelates
heavy metals, steric clash is great, and the residual heavy metal
ion concentration is difficult to meet the standard and the like. The flocculant has the advantages of simple preparation process, mild condition, easy operation and control, high yield, high
raw material utilization, less three waste
discharge and
environmental protection of technical process, convenient popularization and industrialization realization and suitability for treatment of various types of heavy metal
wastewater, such as
smelting wastewater,
electroplating wastewater, nonferrous metals
processing wastewater, mining and beneficiating wastewater,
printed circuit board wastewater, battery plants and the like.