Removal of lead and cadmium ions from aqueous solution by adsorption onto micro-particles of dry plants

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作者：

H Benhima，M Chiban，F Sinan，P Seta，M Persin

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摘要：

In the present work, Pb(II) and Cd(II) ion adsorption onto inert organic matter (IOM) obtained from ground dried plants: The kinetics and the maximum capacity adsorption depend on the type of plant as well as on the metal ions (atomic weight, ionic radius and electronegativity).The adsorption process is affected by various parameters such as contact time, solution volume to mass of plant particles ratio (/), particle size, solution pH and metal concentration. A dose of 25g/l of adsorbent was optimal to obtain maximum adsorption of both metal ions. The maximum metal uptake was obtained with particles of organic matter of For the two metal cations, the uptake efficiency of the studied plants ranged from: E. echinusS. anthophorbiumL. arborescensTwo different waste water types (domestic and industrial) were tested and good results were obtained for removal of Pb(II) and Cd(II) at more than 90%. The removal of the metal and mineral ions waste water was observed for PO at 88%, for NO at 96.5% and for metal ions (Pb(II), Cd(II), Cu(II) and Zn(II)) at about 100%, using IOM as absorbent.

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关键词：

initial metal ion concentration (mg/l) in solution adsorbed metal ion concentration (mg/l) final metal ion concentration (mg/l) in solution volume of ionic solution (l) mR/ (g/l) θTtCrmaxQrmax

DOI：

10.1016/j.colsurfb.2007.06.024

被引量：

162

年份：

2008