ELIMINATION OF CHEMICAL OXYGEN DEMAND IN AQUEOUS SOLUTIONS BY NIPA PALM LEAVES
Keywords:
synthetic organic chemicals, chemical oxygen demand, adsorption, Nipa Palm, carbonized carbon, wastewaterAbstract
The dosage of adsorbent has a significant consequence on the adsorption process. This short communication evaluates the effect of carbon dosage on the removal of chemical oxygen demand (COD) from organic substances contaminated aqueous solutions using Nipa palm leaves powder. The Nipa palm leaves powder were modified by distilled water (PCC), 10 % (3.27 M) H3PO4 (AAC), 10% KOH (BAC) solutions with Commercial Activated Carbon (CAC) used as the control. The result showed that, percent COD reduction by PCC, AAC, BAC and the CAC increased with increase in carbon dosage with maximum carbon dosage obtained around 0.8g/50ml. This optimum amount of 0.8g is capable of reducing COD level by 93.1%, 93.7%, 95.1%, and 96.6%, of DMABA by PCC, AAC, BAC and CAC at 30°C respectively. Meanwhile, the result for kerosene showed that COD reduction due to carbon dosage ranged from 25.5%-64.6%, 19.8%-55.8%, 20.5%-58.7% and 22.5%-61.4% by PCC, AAC, BAC and CAC respectively. The maximum COD reduction observed for kerosene was less than 65% and the percent COD reduction for n-propanol increased from 11.5 to 64.7% for PCC, 9.3 to 62.5% for AAC, 17.5 to 72.2% for BAC and 12.2 to 74.5% for CAC. Comparative analysis of the COD reduction as a function of the carbons produced from Nipa palm and CAC showed that, BAC gave optimum removal of DMABA, kerosene and n-propanol. The results obtained show that Nipa palm could be a beneficial source for the development of an eco-friendly and locally available activated carbon for removal of organic contaminants from domestic and industrial wastewaters.
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