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Citation: WU Zong-Hua, CHEN Shao-Ping, PANG Yan. Preparation of in-situ Immobilized Casuarina Bark and Its Adsorption to Cr(Ⅳ)[J]. Chinese Journal of Applied Chemistry, ;2010, 27(11): 1256-1259. doi: 10.3724/SP.J.1095.2010.00033 shu

Preparation of in-situ Immobilized Casuarina Bark and Its Adsorption to Cr(Ⅳ)

College of Chemistry and Materials Science, Fujian Normal University, Fuzhou 350007

Received Date: 13 January 2010
Revised Date: 5 May 2010

Tannin in Casuarina equisetifolia bark was in-situ immobilized by reaction of aldehydes and tannin. The adsorption behavior of the in-situ immobilized modified bark to Cr(Ⅵ) in aqueous solution was investigated. The results showed that the recovery yields of the modified barks were higher than 95% when the mass ratios of the bark to fomaldehyde,glyoxal and glutraldehyde were 1:20,1:4 and 3:25,respectively. The maximal adsorption capacity of the bark to Cr(Ⅵ) was achieved at pH=2.01.The equilibrium adsorption capacity of the barks modified with fomaldehyde,glyoxal and glutraldehyde was 68.0 mg/g,83.3 mg/g and 82.0 mg/g,respectively. The pseudo-second-order rate constant decreased with increases in the equilibrium adsorption capacity.
- Casuarina equisetifolia bark,
- in situ modification,
- adsorption,
- Cr(Ⅳ)
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