期刊
BIORESOURCE TECHNOLOGY
卷 100, 期 1, 页码 235-243出版社
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2008.05.055
关键词
Sorption kinetics; Sorption isotherms; Heavy metals; Wood industry; Low-cost adsorbents
资金
- Swedish Knowledge Foundation (KK-stiftelsen)
- CAPES Foundation - Brazil Ministry of Education
- AB Gustaf Kahr
- Swedish Institute
Batch sorption with untreated Pinus sylvestris sawdust after settling/sedimentation phase to remove vanadium and lead from a real industrial wastewater was investigated using different adsorbent doses, initial pH, and contact time. The development of pH along the sorption test and a parallel investigation of metals release from sawdust in distilled water were carried out. In order to evaluate kinetic parameters and equilibrium isotherms, Lagergren first-order, pseudo-second-order, intra-particle diffusion and Freundlich models were explored. When the initial pH was reduced from 7.4 to 4.0, the sorption efficiency increased from 32% to 99% for Pb and from 43% to 95% for V. Whereas, V removal was positively correlated with the adsorbent dose, Pb removal was not. The sorption process was best described by pseudo-second-order kinetics. According to Freundlich parameters (K-f and n) sawdust presented unfavourable intensity for sorption of V. (C) 2008 Elsevier Ltd. All rights reserved.
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