yes and no. Like all chemicals too much of it would be harmful to the environment however studies have shown that adding iron to the seas cause the algae to bloom then die and sink to the bottom taking carbon dioxide with it. Therefore burying the carbon dioxide for centuries. This could help reduce the impact of climate change. However some critics are weary and are warning of unwanted environmental side effects.
Iron oxide is not very dangerous. It has a slight health risk, slight reactivity, and minimal flammability. (see http://sargentwelch.com/pdf/msds/Fer_Oxide_Red.pdf)
Copper filings are not attracted to a magnet, as iron filings are.
magnetic separation.
iron
Pure iron filings will be attracted to a magnet; but pieces of iron carbonate will not.
A magnet should be very good at picking out the iron filings.
Copper filings are not attracted to a magnet, as iron filings are.
Iron filings may be pure elemental iron, it depends on the source of the iron.
pure substance
magnetic separation.
iron
Sulfur and iron filings together are a mixture.
Fine iron filings
Pure iron filings will be attracted to a magnet; but pieces of iron carbonate will not.
separate iron filings AND ash from water by filtration or evaporation then, if required, separate iron filings from ash by using a magnetic field,
If they are iron filings, you can use the property of magnetism to remove the iron filings using a magnet. You will need to rinse the iron filings with water after you remove them with the magnet in order to completely remove the sawdust from them.
A magnet should be very good at picking out the iron filings.
No, iron filings are not a mixture