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dc.contributor.authorAchanai Buasrien_US
dc.contributor.authorNattawut Chaiyuten_US
dc.contributor.authorKittiya Phattarasirichoten_US
dc.contributor.authorPhetcharat Yongbuten_US
dc.contributor.authorLalita Nammuengen_US
dc.identifier.citationChiang Mai Journal of Science 35, 3 (September 2008),447-456en_US
dc.descriptionThe Chiang Mai Journal of Science is an international English language peer-reviewed journal which is published in open access electronic format 6 times a year in January, March, May, July, September and November by the Faculty of Science, Chiang Mai University. Manuscripts in most areas of science are welcomed except in areas such as agriculture, engineering and medical science which are outside the scope of the Journal. Currently, we focus on manuscripts in biology, chemistry, physics, materials science and environmental science. Papers in mathematics statistics and computer science are also included but should be of an applied nature rather than purely theoretical. Manuscripts describing experiments on humans or animals are required to provide proof that all experiments have been carried out according to the ethical regulations of the respective institutional and/or governmental authorities and this should be clearly stated in the manuscript itself. The Editor reserves the right to reject manuscripts that fail to do so.en_US
dc.description.abstractIn this research, the ability of natural zeolite clinoptilolite to remove lead from aqueous solutions has been investigated in batch adsorption experiments. Adsorption tests of Pb(II) were carried out using a solid to liquid ratio of 20 g/L and agitation speed of 700 rpm. The effects of particle size of the minerals (75-250 mm), solution concentration (100-1,200 ppm), initial pH (2-7), contact time (30-180 min) and temperature (30-75oC) were examined. Experimental data obtained from batch equilibrium tests have been analyzed by Langmuir and Freundlich isotherm models. It was found that over 95% of the initial Pb(II) amount for solution containing 800 ppm was removed in the 120 min and the optimum pH value of solution to be treated for adsorption was found to be 7. In adsorption studies, residual heavy metal ion concentration reached equilibrium in short duration of 30 min for initial Pb(II) concentration of 100 and 300 ppm. Maximum adsorption capacity, 58.73 mg Pb(II)/g zeolite at 75oC, showed that this adsorbent was suitable for lead removal from aqueous media. Adsorption phenomena appeared to follow Langmuir and Freundlich isotherms. The results show that there is a good fit between the experimental data and empirical isotherms.en_US
dc.publisherFaculty of Science, Chiang Mai Universityen_US
dc.subjectnatural zeoliteen_US
dc.subjection exchangeen_US
dc.subjectadsorption isothermsen_US
dc.titleUse of Natural Clinoptilolite for the Removal of Lead (II) from Wastewater in Batch Experimenten_US
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