Hg(II) removal from aqueous solution by bayberry tannin-immobilized collagen fiber.
A novel adsorbent was prepared by immobilizing barberry tannin (BT) onto collagen fiber, which was found effective to remove Hg(II) from aqueous solution. The bayberry tannin-immobilized collagen fiber (BTICF) shows high adsorption capacity to Hg(II) in a wide pH range of 4.0-9.0, and a maximum adsorption capacity (198.49 mg/g) was reached at pH 7.0 and 303 K when the initial concentration of Hg(II) was 200.0 mg/L. The adsorption isothermal and kinetic data were well fitted by the Langmuir equation and the pseudo-first-order rate equation, respectively. The adsorption mechanism of BTICF to Hg(II) was proved to follow a chelating reaction. The BTICF can be easily regenerated with 0.1M lactic acid after adsorption process and recycled at least 4 times without the loss of adsorption capacity. These facts indicate that BTICF can be used as a low-cost adsorbent for effective removal of Hg(II) from aqueous solutions.
Huang
Xin
X
Department of Biomass Chemistry and Engineering, Sichuan University, Chengdu 610065, Sichuan, PR China.
Liao
Xuepin
X
Shi
Bi
B
D000327:Adsorption; D002712:Chlorides / Q000737:chemistry; D003094:Collagen / Q000737:chemistry*; D006860:Hydrogen Bonding; D006863:Hydrogen-Ion Concentration; D007202:Indicators and Reagents; D009682:Magnetic Resonance Spectroscopy; D008628:Mercury / Q000302:isolation & purification*; D008670:Metals / Q000737:chemistry; D031641:Myrica / Q000737:chemistry*; D012996:Solutions; D013634:Tannins / Q000737:chemistry*; D013816:Thermodynamics; D014867:Water
D002712:Chlorides; D007202:Indicators and Reagents; D008670:Metals; D012996:Solutions; D013634:Tannins; D014867:Water; D003094:Collagen; D008628:Mercury