Preparation of Persimmon Tannins Immobilized on Collagen Adsorbent and Research on its Adsorption to Cr(VI)
Persimmon tannins (PT) were immobilized on a matrix of collagen fiber by cross-linking of glutaraldehyde.The adsorption behaviours to Cr(VI) on PT were investigated including the effects of initial pH,initial concentration of Cr(VI),temperature,adsorbent dosage,adsorption kinetics and the recycling performance of PT adsorbents.The results showed that pH value had a major influence in adsorption.PT showed a strong adsorbability to Cr(VI) in the pH range of 1.0 to 3.0,whereas the effect of temperature on the adsorption was comparatively weaker.The adsorption equilibrium could be well described by Freundlich equation.PT adsorption efficiency of Cr(VI) reached 98.04% and the maximum equilibrium adsorption capacity of Cr(VI) was up to 49.01 mg/g at 303 K with a pH value of 2.0,100 mg/L of initial concentration of Cr(VI) and 0.1g of adsorbent dosage.The adsorption data could be well fitted by pseudo-second-order rate model.PT adsorbents were characterized by FTIR and EDS.The analysis indicated that the adsorption mechanism was mainly contributed by redox adsorption.
Persimmon tannins Collagen fiber Adsorption rate Adsorption capacity Water treatment
Jian Cui Zhongmin Wang Fenglei Liu Peibang Dai Ran Chen Huaiying Zhou
School of Materials Science and Engineering, Guilin University of Electronic Technology, Guilin 541004, China
国际会议
the Chinese Materials Congress 2012(2012年中国材料大会(CMC2012))
太原
英文
523-530
2012-07-13（万方平台首次上网日期，不代表论文的发表时间）