@unit392 : The specific agent shown contains more than a flocculant. It has Calcium hypochlorite. This acts in water by releasing chlorine, which acts as a disinfectant to kill bacteria and viruses. In that process, the water becomes alkaline with a high concentration of OH_ ions. These precipitate (some) of the heavy metals as hydroxides, which are gathered in the flocs for easier removal/filtration. Arsenic is also removed by flocculation using ferrous sulphate see: https://www.researchgate.net/public...ing_water_by_flocculation_and_microfiltration The higher alkalinity brought about by the hypochlorite contributes to the efficacy.
There are many other papers that you can peruse. IMO,the summary given in the CDC paper cited in my earlier post suffice. The CDC is not in the habit of producing unresearched and dubious findings.
There are many other papers that you can peruse. IMO,the summary given in the CDC paper cited in my earlier post suffice. The CDC is not in the habit of producing unresearched and dubious findings.