For the polymeric flocculants such as cationic polyacrylamides, chitosan and poly(diallyldimethyl ammonium chloride) in the removal of anionic dyes from wastewater, addition of inorganic salts generally decreases the color removal efficiency due to charge screening effect. Is there a kind of polymeric flocculant that are not influenced by addition of inorganic salts? or the color removal efficiency can be enhanced with the addition of inorganic salts? If yes, what's the possible mechanism?
Dear Jerry Wenyi Wang, in general neutral polyelectrolytes have less sensitivity to hardness, but floculation efficiency is much less compared to charged polymers. So, obviously a compromise should be reached with copolymers. Please refer to the following documents. My Regards
https://doi.org/10.1080/10601325.2019.1664912
https://doi.org/10.1002/mame.201800526
https://doi.org/10.1515/epoly-2019-0063
Depending on the Characteristics of the wastewater, the presence of CDOM colour dissolved organic matter or FDOM florescent dissolved organic matter. The use of Organic materials such as fishbone has recently proved to be viable, even Moringa seed if blend with inorganic salts bet this is largely dependent on the Conductivity, alkalinity or acidity of the wastewater. Since it's a blend of organic and inorganic flocculants, the mechanism sweep floc and charge neutralization is not ascertained.
Prof Wang, your are so active in the scientifci area with so much achievements. Great job.
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