Idea is to remove the toxic contents of the tanned leather which has for some reason not useful for commercial use, and make use of the extract for future tanning, it saves cost plus can be used to certain extent to help keep nature less pollutioned or otherwise to help environment free of pollutions.
2006-12-23 15:10:08 · 2 answers · asked by MAADABUSHI R 1 in Science & Mathematics ➔ Chemistry
This may be possible through means called bioremediation. Certain plants have the capability of drawing up large amounts of metals through their root systems. I have read that the common pest ragweed has been used for this purpose, though there are probably others and you might be able to do some library research to find which plants take up more chromium than others. Harvest the plants at the end of the growing season and burn them. This drives off the carbon, hydrogen and oxygen. The ash that remains is an enriched ore for the metals. Up to 10 % of the weight of the ash can be metal. It should be possible to remove the sodium salts through filtration; I don’t believe that chromium salts are nearly as soluble as sodium salts. You might try pouring the solutions through a chromatographic column. This is usually used for analysis, but I know of no reason why it could not be scaled up to be used as a separationmethod.
24 DEC 06, 0430 hrs, GMT.
2006-12-23 15:27:06 · answer #1 · answered by cdf-rom 7 · 0⤊ 0⤋
they seem to accomplish the impossible on CSI.
2006-12-23 23:17:28 · answer #2 · answered by hemi_beepbeep 3 · 0⤊ 0⤋