Version 1
: Received: 22 August 2023 / Approved: 23 August 2023 / Online: 24 August 2023 (03:38:22 CEST)
Version 2
: Received: 19 September 2023 / Approved: 19 September 2023 / Online: 20 September 2023 (09:55:13 CEST)
Levakov, I.; Maor, I.; Barak, C.; Kirshenbaum, Y.; Rytwo, G. Colorimetric Quantification for Residual Poly-DADMAC in Water Treatment. Water2023, 15, 3352.
Levakov, I.; Maor, I.; Barak, C.; Kirshenbaum, Y.; Rytwo, G. Colorimetric Quantification for Residual Poly-DADMAC in Water Treatment. Water 2023, 15, 3352.
Levakov, I.; Maor, I.; Barak, C.; Kirshenbaum, Y.; Rytwo, G. Colorimetric Quantification for Residual Poly-DADMAC in Water Treatment. Water2023, 15, 3352.
Levakov, I.; Maor, I.; Barak, C.; Kirshenbaum, Y.; Rytwo, G. Colorimetric Quantification for Residual Poly-DADMAC in Water Treatment. Water 2023, 15, 3352.
Abstract
Poly-DADMAC (PD) is a common organic polymer used as an effective coagulant in water treatment. yet its residue in water raises several concerns regarding membrane fouling and the production of carcinogenic compounds. Therefore, fast and simple quantification is necessary to control and monitor the optimal poly-DADMAC concentration dose with minimal negative effects. This study introduces a new colorimetric quantification method for poly-DADMAC, based on complexation with a cationic dye (fast green- FG). The method was examined through varying conditions that included different analytical and commercial poly-DADMAC formulations and concentrations. The experiments confirm its effectiveness in quantifying poly-DADMAC with a detection limit of 3.22 µg L-1 (0.02 µM based on monomers' molecular weight), which is one order of magnitude lower than regulatory requirements (50 µg L-1). To validate the method, the effect of pH was examined, and implementation demonstrations were conducted on cyanobacteria and cowshed polluted water samples. This research presents a new, fast, easy to apply, and cost-effective method to accurately quantify poly-DADMAC, improving water treatment strategies and allowing high quality purification and water reuse.
Keywords
poly-DADMAC; fast green; colorimetric quantification; polyelectrolyte; water treatment
Subject
Environmental and Earth Sciences, Water Science and Technology
Copyright:
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
