In a wastewater to keep pH at 7 one can use KH2PO4 and K2HPO4 as phosphate buffer. but is there an upper limit for their supplied concentration?
e.g. a wastewater sample with 2500 mg/l SCOD (pH = 5.5)(characteristics close to pulp and paper). I supply 1200 mg/l KH2PO4 & 2400 mg/l K2HPO4. at the end of reaction pH goes up to 8.6. I want to keep it 7 - 7.5 and for this purpose I am thinking of increasing concentrations of buffer.. but i dont know if there is a risk of phosphate overdosing???
2007-05-04
22:39:19
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3 answers
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asked by
Anonymous
in
Environment