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Title of Journal: Wood Sci Technol

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Abbravation: Wood Science and Technology

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Springer-Verlag

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DOI

10.1016/0197-0186(89)90033-8

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1432-5225

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Sorption of copper and lead by citric acid modifie

Authors: K S Low C K Lee S M Mak
Publish Date: 2004/11/10
Volume: 38, Issue: 8, Pages: 629-640
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Abstract

The sorption characteristics of citric acid modified wood to remove copper and lead ions from aqueous solution under batch conditions have been investigated Sorption was pH dependent with increasing uptake at higher pH values The kinetics of sorption for both ions was rapid with 90 sorption taking place within the first 60 min regardless of its initial concentration Sorption can be explained by a secondorder kinetics model from which the rate constant the equilibrium sorption capacity and the initial rate were calculated From these parameters the predictive models for Cu and Pb sorbed qt in time t and at an initial concentration Co are given by qt=Cot031Co−229+004Co+519t and qt=Cot/006Co−659+001Co+448t for Cu and Pb respectively Using these models the predicted and experimental uptakes of Cu and Pb were compared and discussed Maximum sorption capacities of modified wood under present experimental conditions were 2370 and 8264 mg/g for Cu and Pb respectively However for untreated wood the corresponding values were 256 and 771 mg/g indicating a tenfold increase in sorption upon citric acid modification Ethylene diamine tetraacetic acid and nitrilotriacetic acid complexed with both ions render sorption less favorably However salicylic acid had little influence In a binary system Pb ions were more favorably sorbed than Cu ions which could be due to the larger ionic radius of the former ions


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Other Papers In This Journal:

  1. Fourier transform infrared analyses of bog and modern oak wood ( Quercus petraea ) extractives
  2. Duration-of-load and creep effects in strand-based wood composite: experimental research
  3. Determination of the mechanical properties of Castanea sativa Mill. using ultrasonic wave propagation and comparison with static compression and bending methods
  4. Density profile relation to hardness of viscoelastic thermal compressed (VTC) wood composite
  5. Monoethanolamine extraction of copper-preservative-treated wood and reuse of the extract for wood preservation
  6. Modelling the mortality of Hylotrupes bajulus (L.) larvae exposed to anoxic treatment for disinfestation of wooden art objects
  7. Characteristic fragment ions from lignin and polysaccharides in ToF–SIMS
  8. A three-dimensional wood material model to simulate the behavior of wood with any type of knot at the macro-scale
  9. Acoustic emission analysis of industrial plywood materials exposed to destructive tensile load
  10. Electromagnetic shielding wood-based composite from electroless plating corrosion-resistant Ni–Cu–P coatings on Fraxinus mandshurica veneer
  11. The suitable harvesting season and the part of moso bamboo ( Phyllostachys pubescens ) for producing binderless boards
  12. Detection of chlorine-labelled chitosan in Scots pine by energy-dispersive X-ray spectroscopy
  13. Dynamic crushing characteristics of spruce wood under large deformations
  14. Influence of plum gum and sodium perborate addition on spruce kraft pulp properties during oxygen delignification
  15. Continuum contraction of tension wood fiber induced by repetitive hygrothermal treatment
  16. Effect of heat treatment on extracellular enzymatic activities involved in beech wood degradation by Trametes versicolor
  17. Digital radiography (DR) and imaging analysis for evaluating the penetration and distribution of organic substances used in wood conservation
  18. Longitudinal shrinkage behaviour of compression wood in radiata pine
  19. Nanoindentation of juvenile and mature loblolly pine ( Pinus taeda L.) wood fibers as affected by thermomechanical refining pressure
  20. Nanoindentation of juvenile and mature loblolly pine ( Pinus taeda L.) wood fibers as affected by thermomechanical refining pressure
  21. Influence of combined hydro-thermal treatments on selected properties of Turkey oak ( Quercus cerris L.) wood
  22. Resistance of Scots pine ( Pinus sylvestris L.) wood modified with functionalized commercial silicone emulsions against subterranean termites

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