Effectiveness of Water Hyacinth and Arum Shoot Powders to Remove Cr and Cu from Tannery Effluents

Abstract

AbstractThis research was performed to find out the efficiency of water hyacinth (Eichhornia crassipes) shoot powder (WSP) and arum (Colocasia esculenta) shoot powder (ASP) in eliminating chromium (Cr) and copper (Cu) from tannery wastewater (TWW). For this purpose, WSP and ASP were added to standard solutions (SS) of Cr and Cu; and TWW. Elimination of the metals was inspected in batch processes at diverse contact periods with the identical bio-adsorbent concentration of 5.0 mg L−1. The colour was bottle green and the odour was pungent which were totally absent after the application of the treatment. The maximum Cr was eliminated from the SS and the TWW with the WSP were 85.29% and 87.50% (reduced from 12.0 mg L−1 to 1.5 mg L−1), respectively, at 180 min. The WSP impassive the maximum amount of Cu, 87.96%, from the SS at 180 min, whereas 83.35% was the maximum elimination from the TWW at 120 min. The ASP eliminated the maximum amount of Cr, 79.46%, at 180 min from the SS, whilst 77.08% of the metal was eliminated from the TWW for the same. The maximum amount of Cu, 78.57%, was eliminated from SS at 180 min with the ASP whilst 75.0% was the maximum from the TWW for the same. The WSP was more operative than the ASP in eliminating Cr and Cu from both the solutions.KeywordsArumBatch experimentCrCuRemoval efficiencyTannery waste water