What can be possible causes for finished manganese to be higher than the raw manganese?
asked 13 April 2017 asked by Phill (510 points)
Chlorination can be one cause of cyclical elevated manganese infestation. The behaviour of manganese deposits within the system alone can be responsible
Are you using potassium permanganate (KMnO4) for manganese removal? An overdose of KMnO4 will produce a higher Mn level in the filters and effluent.
If you have a step of your process for manganese removal it can be a release of an accumulation somewhere in your process. If you don't have anything to remove manganese in your process but you have some oxydant (such as chlorine) and you have manganese at inlet of the plant, it will oxydise your dissolved manganese and you will accumulate the particules somewhere in your process. When you will have accumulated a certain amount, it can be released from time to time because the accumulation is too high in a reservoir, sometime from a filter. As stated by Kevin, the use of KMnO4 can be the source. If you can give us some more information about your process maybe we can help you more with your problem.
If you are feeding any type of iron chemical it will give a false reading of higher manganese. For example, if you pretreat with chlorine dioxide, and feed ferrous chloride to diminish the chlorite residual, at high mg/L ferrous can raise your manganese numbers. Also, if you have had a recent slug of manganese come into your plant and saturated your blankets it will take some time to get rid of said saturations.
I read that very high levels of gadolinium was found in San Francisco waste water ....I have thus in me from several MRIs is a toxic level but the contrast dye has added Manganese .....You should check to see if this a pharmaceutical issue ....In this article it was said the gadolinium is non-filtererable ....Also the workers had no MRIs but had very high levels of gadolinium with their family members ....I still don't know the process of this manganese but it was mentioned it was a nanotechnology process www.gadoliniumtoxicity.com
Hi, Not sure I understand. What is the link between gadolinium and manganese?
The manganese was added to MRI dyes as a chelation element to help remove the gadolinium