Regarding the issue of defluoridation
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Our company has wastewater that contains fluoride, phosphate ions, and sulfate ions； In the laboratory mixture of fluoride and phosphate ions, sulfate ions were not added; the addition of calcium ions allows for effective removal of these ions. But what if sulfate ions are present? Will they get precipitated? Moreover, first, the amount of sulfate ions is very high; second, calcium represents a certain level of hardness. I will proceed with evaporation later. How can I control the amount of calcium chloride added so that only F and P get precipitated, while sulfate ions do not? Please help me solve this problem, experts
Add sodium carbonate first to remove calcium, then use resin to remove fluoride
You can search for phosphorus ore and the production of calcium hydrogen phosphate using the sulfuric acid method; I hope this will be useful to you
If I do the math, the guy is probably in the phosphorus chemicals industry, dealing with the purification of yellow phosphorus exhaust gases?
A large amount of sulfate ions is inevitable, and the amount of precipitate generated by the defluorination process used by the original poster must be considerable