Figure 8
From: Removal of metal ions and humic acids through polyetherimide membrane with grafted bentonite clay

The elemental mapping of (a) silicon and (b) aluminium of PEM-3 membrane.
From: Removal of metal ions and humic acids through polyetherimide membrane with grafted bentonite clay

The elemental mapping of (a) silicon and (b) aluminium of PEM-3 membrane.