Micro precipitation of lead on the surface of crab shell particles
SCIE
SCOPUS
- Title
- Micro precipitation of lead on the surface of crab shell particles
- Authors
- Lee, MY; Park, JM; Yang, JW
- Date Issued
- 1997-11
- Publisher
- ELSEVIER SCI LTD
- Abstract
- 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.
- Keywords
- crab shell; precipitation; calcium carbonate; chitin; biosorbent; RHIZOPUS-ARRHIZUS; METAL RECOVERY; CHITOSAN BEADS; HEAVY-METALS; BIOSORPTION; REMOVAL; BIOMASS; IONS; ADSORPTION; URANIUM
- URI
- https://oasis.postech.ac.kr/handle/2014.oak/21166
- DOI
- 10.1016/S0032-9592(97)00026-5
- ISSN
- 0032-9592
- Article Type
- Article
- Citation
- PROCESS BIOCHEMISTRY, vol. 32, no. 8, page. 671 - 677, 1997-11
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