Characterization of carbonated tricalcium silicate and its sorption capacity for heavy metals: A micron-scale composite adsorbent of active silicate gel and calcite.

Characterization of carbonated tricalcium silicate and its sorption capacity for heavy metals: A micron-scale composite adsorbent of active silicate gel and calcite. Research Abstract Details 

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Characterization of carbonated tricalcium silicate and its sorption capacity for heavy metals: A micron-scale composite adsorbent of active silicate gel and calcite. Abstract Text:

Quanyuan Chen,Colin D Hills,Menghong Yuan,Huanhuan Liu,Mark Tyrer,

Adsorption-based processes are widely used in the treatment of dilute metal-bearing wastewaters. The development of versatile, low-cost adsorbents is the subject of continuing interest. This paper examines the preparation, characterization and performance of a micro-scale composite adsorbent composed of silica gel (15.9w/w%), calcium silicate hydrate gel (8.2w/w%) and calcite (75.9w/w%), produced by the accelerated carbonation of tricalcium silicate (C(3)S, Ca(3)SiO(5)). The Ca/Si ratio of calcium silicate hydrate gel (C-S-H) was determined at 0.12 (DTA/TG), 0.17 ((29)Si solid-state MAS/NMR) and 0.18 (SEM/EDS). The metals-retention capacity for selected Cu(II), Pb(II), Zn(II) and Cr(III) was determined by batch and column sorption experiments utilizing nitrate solutions. The effects of metal ion concentration, pH and contact time on binding ability was investigated by kinetic and equilibrium adsorption isotherm studies. The adsorption capacity for Pb(II), Cr(III), Zn(II) and Cu(II) was found to be 94.4mg/g, 83.0mg/g, 52.1mg/g and 31.4mg/g, respectively. It is concluded that the composite adsorbent has considerable potential for the treatment of industrial wastewater containing heavy metals.

Characterization of carbonated tricalcium silicate and its sorption capacity for heavy metals: A micron-scale composite adsorbent of active silicate gel and calcite. Publishing Authors By Initials

Q Chen,CD Hills,M Yuan,H Liu,M Tyrer,

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Characterization of carbonated tricalcium silicate and its sorption capacity for heavy metals: A micron-scale composite adsorbent of active silicate gel and calcite. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of hazardous materials

VOLUME: 153

Page Numbers: 775-83

Journal Abbreviation: J. Hazard. Mater.

ISSN: 0304-3894

DAY: 8

MONTH: 09

YEAR: 2007

Characterization of carbonated tricalcium silicate and its sorption capacity for heavy metals: A micron-scale composite adsorbent of active silicate gel and calcite. Information

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LANGUAGE: eng

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Grant and Affiliation Information for Characterization of carbonated tricalcium silicate and its sorption capacity for heavy metals: A micron-scale composite adsorbent of active silicate gel and calcite.

AFFILIATION: School of Environmental Science and Engineering, Donghua University, Shanghai 200051, PR China.

Country: Netherlands

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MEDLINETA: J Hazard Mater

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