Mixed acid recovery
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There is a type of mixed acid consisting of 6% sulfuric acid, 10% nitric acid, with the rest being water. I would like to ask everyone: in which industries can this kind of acid be used?
The acid concentration is too low; a higher level would be suitable for neutralizing alkaline wastewater.
It can be used in the production of ordinary calcium phosphate
Send it to the phosphate fertilizer plant; currently, the phosphate fertilizer plants in the market are surely already saturated with acid usage, so it’s difficult to handle this. . Give it away for free
The concentration is indeed too low; consider your own energy capabilities to concentrate and increase the acid concentration or to neutralize the emissions. Currently, this concentration is available for free in the market; no one wants to pay for it
Use diffusion dialysis for recovery; consider reusing the fresh water, while sending the concentrated water to others or evaporating it. Zero emissions, right?