Batch mode adsorption studies for the removal of heavy metal
ions are carried out to investigate the effect of different parameters
Fig. 2. (a) GO suspension (left) and GO particles (right) (b) UV–vis spectrum of GO nanoparticles (b) FT-IR spectrum of GO nanoparticles (c) XRD of GO nanoparticles (inset
shows XRD of graphite).
A. Gopalakrishnan et al. 16 / Journal of Industrial and Engineering Chemistry 30 (2015) 14–19 such as an adsorbate concentration, adsorbent dosage, pH and
electrical conductivity. Raw effluent was taken in separate flask
with 100 mL each and different amounts of GO adsorbent (10, 20,
30, 40, 50 and 70 mg) were added to it with one flask as blank
(0 mg). The mixture was then agitated at 400 rpm in shaker and the
same was centrifuged (6000 rpm) to obtain supernatant solution.
The obtained supernatant solution is then filtered with Whatman
filter to get GO treated pharma-effluent and the same is analyzed
for heavy metal ion removal. Fig. 6 shows the images of raw
pharma-effluent (left picture) and GO treated pharma-effluent
(right picture).