Micro precipitation of lead on the surface of crab shell particles

Crab shell particles were used as a biosorbent to remove lead from aqueous solutions. The equilibrium isotherm showed that crab shell particles took up lead to the extent of 1300 mg Pb g(-1) crab shell. The optimum pH range for maximum lead removal was increased to 5.5-11.0 compared to the shell-free control pH of 8.5-11.0. pH values of solutions with crab shell material added were increased spontaneously to about 10 as a result of the CaCO3 present, which formed complexes with lead according to pH. Electron spectroscopy, Fourier transform infrared spectrometry, scanning electron microscopy and X-ray diffraction results confirmed that -NHCOCH3 and CO32- were involved in binding of lead. In addition, the removal of lead occurred mainly through dissolution of CaCO3 followed by precipitation of Pb-3(CO3)(2)(OH)(2) and PbCO3 near the surface of crab shell. Micro precipitates formed were then adsorbed to the chitin on the surface of the crab shell particles. (C) 1997 Elsevier Science Ltd.
Publisher
ELSEVIER SCI LTD
Issue Date
1997-11
Language
ENG
Keywords

RHIZOPUS-ARRHIZUS; METAL RECOVERY; CHITOSAN BEADS; HEAVY-METALS; BIOSORPTION; REMOVAL; BIOMASS; IONS; ADSORPTION; URANIUM

Citation

PROCESS BIOCHEMISTRY, v.32, no.8, pp.671 - 677

ISSN
0032-9592
URI
http://hdl.handle.net/10203/73512
Appears in Collection
CBE-Journal Papers(저널논문)
Files in This Item
There are no files associated with this item.
  • Hit : 151
  • Download : 0
  • Cited 0 times in thomson ci
This item is cited by other documents in WoS
⊙ Detail Information in WoSⓡClick to seewebofscience_button
⊙ Cited 56 items in WoSClick to see citing articles inrecords_button

qr_code

  • mendeley

    citeulike


rss_1.0 rss_2.0 atom_1.0