Abstract

The garden grass was utilized as low cost adsorbent to remove cadmium ions from aqueous solution usingbiosorption. All the experiments were conducted in batch system to investigate the biosorption capacity as well as the effects of pH, temperature, agitation speed, and initial metal concentration on the biosorption efficacy. Fourier Transformation Infrared Spectroscopy analysis was used to find the effectsof functional groups of garden grass in biosorptionprocess. The results showed that the garden grass could be used efficiently to remove cadmium from aqueous solution and up to 85% of cadmium removal was obtainedat the optimal conditions. The biosorption equilibrium was reached at 60 min and the maximum biosorption capacity was found to be 17.2 mg/g for 1 g dose.Experimental isotherms data well fittedthe Langmuir model. Experimental kinetics data showed that the biosorption process fitted well the pseudo-second-order kinetics model.

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