Journal
JOURNAL OF ENVIRONMENTAL MANAGEMENT
Volume 180, Issue -, Pages 439-449Publisher
ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD
DOI: 10.1016/j.jenvman.2016.05.055
Keywords
Lead; Removal; Sawdust; Biochar; Modelling; Hydrus
Categories
Funding
- Tunisian Ministry of Higher Education and Scientific Research
- German-Tunisian exchange service DAAD [A/14/05079]
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Lead removal from aqueous solutions by raw cypress (Cupressus sempervirens L.) sawdust (RCS) and its derivative magnesium pretreated biochar (Mg -B) was investigated under static and dynamic conditions through batch and column assays. The Hydrus-1D model was used to estimate the transport parameters of the lead measured breakthrough curves. The batch experiments results showed that Mg -B was very efficient in removing lead compared to RCS and several other previously tested natural and modified materials. The column experiments results indicated that for both RCS and Mg -B, lead breakthrough curves and the related removal efficiencies were mainly dependent on the used initial concentration and the adsorbents bed height. The use of Hydrus-1D showed that the two-site chemical non-equilibrium model describes better the experimental lead breakthrough curves for both RCS and Mg -B as the equilibrium model. (C) 2016 Elsevier Ltd. All rights reserved.
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