Tagged Questions

Filtering is a process in which chemicals are being separated using their different state of matter.

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Separating citric acid from sugar

I'm trying to get as pure citric acid as possible from a mandarin. It's not because I desperately need citric acid, but because I want to achieve this. I started by grating the mandarine and ...
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1answer
61 views

Homemade filter paper

I used normal paper from my notebook to perform filtration. The filtration is 100% perfect, but takes incredibly long to happen, because the paper is too dense. I'm not planning to buy filtration ...
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1answer
67 views

Yellow-amber debris above water filter: What is it?

I have some weird, yellow-amberish pebbles that have been filtered by my Zero waterfilter. Any idea what they are? Copper maybe? The black stuff is charcoal from the filter. The quality of the water ...
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3answers
151 views

Is there a household method to decolorize potentially contaminated water?

I am living in my dorms at the moment and apparently it is an accepted thing that the water in the building is brown and yellow. According to my RA, this is a characteristic of the town I live in. ...
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3answers
2k views

Diamond filtering - is it real or bogus?

I always hear that some big corporations use "diamond dust" to filter water seven times to make "diamond clear" vodka. I tried googling something about using diamonds for filtering, but I could not ...
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1answer
7k views

Remove formalin from food using chemical found in kitchen

In some parts of the world food is stored with formalin so it looks fresh forever! This is astonishing, but true (See refs here). As formalin is very bad for health and damages kidneys and liver very ...
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1answer
106 views

Negative retention for chloride in hydrolysate filtration

I tried to fractionate proteins as a function of their size with an ultrafiltration membrane. I observed a higher concentration of chloride in my permeate than in my feed or retentate. The proteins do ...
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1answer
2k views

Why does activated carbon preferentially adsorb anions?

Brands like Brita and Pur (in the U.S.) have made a name for themselves for the ability of their product (essentially a large-pore filter with activated carbon/charcoal) to extract the added chlorine ...