high viscosity molecular polydadmac for water treatment in saudi arabia

high viscosity molecular polydadmac for water treatment in saudi arabia
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  • Is poly-DADMAC a coagulant?
  • Author to whom correspondence should be addressed. Deceased. Poly-DADMAC (PD) is a commonly used organic polymer in water treatment, known for its effectiveness as a coagulant. However, its presence as a residue in water raises concerns related to membrane fouling and the potential formation of carcinogenic compounds.
  • What aqueous solution is used for PolyDADMAC?
  • Experiments were conducted using nanopure water (Milli-Q, Millipore, USA). Commercial polyDADMAC (aqueous solution, 20 wt%) was purchased from Sigma Aldrich (St. Louis, MO, USA) and was diluted to 2 g/L with nanopure water. Solution pH was adjusted using phosphate.
  • Does high viscosity PolyDADMAC increase water flux?
  • Water flux produced by high viscosity PolyDADMAC at 0.155 g/mL is lower than the one at 0.120 g/mL. This decrease of water flux occurs due to the sharp increase of PolyDADMAC viscosity coincided with the concentration increase.
  • Which water treatment polymer produces the most NDMA?
  • Upon ozonation, polyDADMAC yields the highest amount of NDMA among several water treatment polymers, including polyamines and cationic polyacrylamides. Ozonation transforms polyDADMAC to dimethylamine (DMA) and NDMA formation is correlated to polyDADMAC degradation and DMA release.