Raising pH will precipitate iron. If runoff waters from scrap field can be funnelled into pond(s), liming the water to maintain pH 8 or more, the iron should precipitate out. Liming the scrap field could also help. With acid rain, added treatments with time would be needed. Perhaps recycling the scrap metal might be considered, and makes sense to recycle or repurpose waste, rather than fouling water and damaging the community of users and dependent resources.

Well,

The best treatment method for this phenomenon is to cut the pollution from the source. Therefore, the isolation of the iron waste with clayey dams or separating walls extending below the land surface to ensure that the iron and their ions are not dispersed and mixed with runoff water or streams water.

Regards

Thanks Mr. Hansen and Hussien.

First, I agree that separation the iron scrap is best way but that could not be a method right now in my field. Thus, it is being a problem. And second I think It is worthy to try Mr. Hansen's advise, but I have a question about that way. Usually red water is produced from the rust on iron scrap pile. And the rust was usually known as FeOOH, Fe2O3, FeO2. If so, increasing pH can react the oxidized form of iron and can precipitate even thought the red water is not Fe2+ or Fe3+ ?

Hi dear,

Thanks for the question.

I agree with Pr. Kenneth M Towe ,

With my best regards!