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标题：The Adsorption Study of Copper Removal by Chitosan-Coated Sludge Derived from Water Treatment Plant
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作者：Meng-Wei Wan ; Chan-Ching Wang ; Chien-Min Chen 等
期刊名称：International Journal of Environmental Science and Development
印刷版ISSN：2010-0264
出版年度：2013
卷号：4
期号：5
页码：545-551
DOI：10.7763/IJESD.2013.V4.411
摘要：The rapid development of science and technology in recent years created a standard of living that caused serious deterioration in the environment.Heavy metal contamination in the soil, surface water and groundwater is one of the major environmental problems due to their non-biodegradability and toxicity.Thus, how to solve efficiently the heavy metal pollution in groundwater has become the most essential issue around the world.Commercialized adsorbents such as activated carbon are effective in removing heavy metals but remain costly.In this study, the removal of copper (II) from aqueous solutions using a biodegradable material, known as chitosan coated sludge (CCS), was investigated under static conditions.The sludge was obtained from a water treatment plant.Moreover, batch experiments were conducted to investigate the adsorption effect under different initial concentration (Co = 100, 500, 1000 and 2000 mg/L), solution at pH=3 to pH=4 and contact time (0.5, 1, 2, 4, 6, 12 and 24 h).Results indicated that the data fitted well with Langmuir model at Qmax value of 18.83 mg/g CCS for Cu(II) ions at two hours contact time.The kinetic data best fit the pseudo-second order equation, indicating that chemisorption is the rate-limiting step of the Cu(II) adsorption.
关键词：Adsorption; chitosan; copper; sludge; water treatment plant