Fig. 6
![Fig. 6](http://media.springernature.com/full/springer-static/image/art%3A10.1186%2Fs42269-020-00456-z/MediaObjects/42269_2020_456_Fig6_HTML.png)
A 3-dimensional plot of concentration and pH against the percentage removal of chromium when tea bag residues are used as adsorbent
A 3-dimensional plot of concentration and pH against the percentage removal of chromium when tea bag residues are used as adsorbent