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Sustainable natural adsorbents for heavy metal removal from wastewater: lead sorption on pine bark ( Pinus radiata D.Don)
Author(s) -
MontesAtenas Gonzalo,
Schroeder Sven L. M.
Publication year - 2015
Publication title -
surface and interface analysis
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.52
H-Index - 90
eISSN - 1096-9918
pISSN - 0142-2421
DOI - 10.1002/sia.5807
Subject(s) - sorption , adsorption , chemistry , sorbent , aqueous solution , nuclear chemistry , pinus radiata , x ray photoelectron spectroscopy , sulfuric acid , bark (sound) , fourier transform infrared spectroscopy , pulp (tooth) , metal , environmental chemistry , chemical engineering , inorganic chemistry , organic chemistry , botany , engineering , biology , medicine , physics , pathology , acoustics
Aqueous Pb(II) adsorption on pine bark (Pinus Radiata D.Don), an inexpensive and sustainable natural sorbent material, has been evaluated and the mechanism of metal retention characterized by scanning electron microscopy (SEM), diffuse reflectance infrared Fourier transform spectroscopy (DRIFTS) and X‐ray photoelectron spectroscopy (XPS). Bark pulp densities >1.5 g l −1 achieve near 100% Pb(II) removal from aqueous solutions containing 100 mg l −1 Pb(II). Adsorption rates increased with pulp density, although adsorption capacity diminished at high densities because of blockage of adsorption sites. The effects of washing and sulfuric acid activation were assessed and found to be less important than in previous metal sorption studies. Pb(II) sorption takes place mainly at the lignocellulosic C―O groups, with adsorption at phenolic sites appearing to be most significant. © 2016 The Authors. Surface and Interface Analysis published by John Wiley & Sons, Ltd.