Study on the Flocculation Treatment of Simulative Dyeing Wastewater by the Dicyandiamide Formaldehyde Polymer

Abstract

The laboratory-made dicyandiamide formaldehyde polymer is used to study the effect of the flocculation treatment of simulated wastewater of You Li Su-hong EB. And the influencing factors mainly include flocculant dosage, pH and temperature. The experimental results show that when the dicyandiamide formaldehyde flocculant dosage is 8mL / L and pH is acidic or neutral, COD and color removal rate are the highest that have reached more than 70%. Besides, temperature has little effect on the flocculation treatment, and room temperature is enough to make the treatment effect good. Finally compared with the commonly used flocculant PAC, dicyandiamide formaldehyde polymer treatment effect is better with less addition.

A novel intumescent flame retardant with nanocellulose as charring agent and its flame retardancy in polyurethane foam

“…b shows, the zeta potential of the nanocellulose suspension is below −30 mV, this result illustrates that the nanocellulose is negatively charged by combining , which is corresponding to the literature . Dicyandiamide‐formaldehyde is known as a kind of cationic flocculants, which would adsorb the negatively charged particles . In this work, APP is firstly microencapsulated by dicyandiamide‐formaldehyde, which makes it possible to absorb negatively charged nanocellulose by electrostatic flocculation.…”