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Amutha, R.
- Utilization of Melia azedarach Fruit Based Adsorbents for the Removal of Heavy Metal Ions from Waste Water
Authors
1 Applied Sciences Department, PEC University of Technology, Chandigarh, IN
2 Biopharmaceutics and Pharmaceutical Microbiology, Nnamdi Azikiwe University, Awka, PMB 5025, Awka, Anambra State, NG
Source
Asian Journal of Research in Chemistry, Vol 4, No 11 (2011), Pagination: 1772-1776Abstract
Utilization of Melia azedarach fruit based adsorbents for the removal of heavy metals like Cu (II), Ni (II) was considered. The effect of base treatment on the adsorbent behaviour was also studied. Batch adsorption studies were conducted as a function of solution concentration, adsorbent dose, and contact time at pH 5. Equilibrium adsorption data were fitted to regressed form of Langmuir, Frendlich and Temkin isotherm equations. At room temperature, 100 mg of Melia azedarach adsorbent removed about 95% of Cu (II) ions from the aqueous solution in the concentration range of 10-25ppm. While, 69% to 86% of Ni (II) ions were removed by MA adsorbent under same conditions. Slight increase in metal ions uptake was observed in the case of base treated MA adsorbents. Equilibrium adsorption data for Cu(II) and Ni(II) fitted well in to Freundlich adsorption isotherm.
Keywords
Melia azedarach, Adsorption, Freundlich Isotherm and Pest Free Treated Water.
- Influence of Acid Treatments of Sugarcane Bagasse Carbon Sample on the Adsorption of CU (II) and PB (II) Ions from Aqueous Solution
Authors
1 Applied Sciences Department, PEC University of Technology, Chandigarh, IN
Source
Asian Journal of Research in Chemistry, Vol 4, No 11 (2011), Pagination: 1678-1684Abstract
Sugar carbon was prepared from sugarcane bagasse by carbonization with conc. H2SO4. Yield was about 20% by weight. The surface of the original unmodified sugar carbon (UM-carbon) was modified by treatment with 2M HCl (SM-A carbon), 2M NaOH (SM-B carbon) and 50% (v/v) HNO3 (SM-O carbon). Carbon samples were characterized by SEM, FTIR and XRD techniques. Lead and copper adsorption on unmodified and modified sugar carbons from aqueous solution at room temperature (25°C) was studied by batch analysis method. The solution pH was maintained at 5. Nitric acid oxidation of the original sugar carbon increased metal uptake by almost 100% and simple HCl treatment enhanced metal adsorption by about 10%. Adsorption data of both metals fit well in Freundlich adsorption isotherm equation. Lead (II) ions were adsorbed almost in double amounts of copper (II) ions confirming that pore accumulation takes place in addition to ionic interactions in solution.