期刊
QUIMICA NOVA
卷 30, 期 5, 页码 1153-1157出版社
SOC BRASILEIRA QUIMICA
DOI: 10.1590/S0100-40422007000500019
关键词
green coconut shells; toxic metals; wastewater
Green coconut shells were treated with acid, base and hydrogen peroxide solutions for 3, 6, 12 and 24 h for removing toxic metals from synthetic wastewater. The removal of ions by the adsorbent treated with 0.1 mol L-1 NaOH/3h was 99.5% for Pb2+, and 97.9% for Cu2+. The removal of Cd2+. Ni2+. Zn2+. using adsorbent treated with 1.0 mol L-1 NaOH/3 h, was 98.5, 90.3 and 95.4%, respectively. Particle size, adsorbent concentration and adsorption kinetics were also studied. An adsorbent size of 60-99 mesh and a concentration of 30-40 g/L for 5 min exposure were satisfactory for maximum uptake of Pb2+, Ni2+, Cd2+, Zn2+ and Cu2+ and can be considered as promising parameters for treatment the aqueous effluents contaminated with toxic metals.
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