Table 2.

Percent removal of chromium from the real sample solution (diluted 25 times) (contact time 60 min, adsorbent dose 40 g/L, initial pH 3.8)

Exp. no.	Initial conc. (mg/L)	Final conc. (mg/L)	Average final conc. (mg/L)	% Removal
1	221	56.2
2	221	56.8	56.6 ± 0.3	74.4
3	221	56.8