This study aims to investigate the adsorption of C.I. Acid Red 97 (AR97) onto walnut shell (WS) in order to find out the desired conditions. The effect of operational parameters including adsorbent dosage, agitation speed, contact time, pH and temperature was studied in a batch mode. The results revealed that 73.33 % of AR97 (50 mg/L) was decolorized at 60 min of contact time, agitation rate...
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