How to dispose of dichromate waste liquid after use and the cost is low
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How to dispose of dichromate waste liquid is the most convenient and low-cost method
If the waste liquid during analysis is not large, it can be discharged directly. After all, there is a large amount of water in the enterprise and can be diluted to meet the standards. If you are considering environmental protection, it is recommended that you collect it, concentrate it, and return it to the reagent supplier for treatment. We use this method for highly toxic and difficult-to-treat heavy metal pollutants.
:) Thank you. We are a school and the amount of salt used in analysis experiments is not very large. It seems that we can only follow your first method.
Dichromate contains heavy metals and is highly toxic. Regardless of whether the amount is large or small, or whether the discharged wastewater meets the standards, it will cause pollution to the environment after discharge. Personally, I think these reagents should be collected into special containers for recycling after use. If the unit does not have the capability in this area, it can be sent back to the reagent production unit or other units with processing capabilities. This is a matter of professional ethics and social responsibility of citizens!
It should be recycled, then treated with ferrous sulfate, the filtrate should be discharged, and the filter residue should be buried deeply.