We have completed a lot of work in the removal of iron and manganese from waters in the UK. I can supply operating details and levels of removal if you wish using Natural Charcoal
It depends on what you are going to use the grey water for but plants using sand / GAC and Bone char can be designed for this and I can help and offer a design if you wish.
Bone char is effective in both these ions, although it is more effective on Arsenic III rather than V. In floride removal Bone char will remove 80% of the ions present
We have been doing a lot of work using Bone char for this appication. and there is a lot of literature out there to support this material. It is relatively cheap material and is used in the UK to remove colour from water for drinking. Obviously it does not eliminate the problem. The Bone Char...