植物单宁对皮革中Cr(Ⅵ)的还原吸附研究  

Study on the Reduction and Adsorption of Cr(Ⅵ) in Leather Containing Tannins

作　　者：孔佳超[1,2] 付彪[2] 高文远[1] 王茹[1] 石碧[2] 

机构地区：[1]四川大学化学工程学院,四川成都610065 [2]四川大学制革清洁技术国家工程实验室,四川成都610065

出　　处：《皮革科学与工程》2010年第4期5-9,共5页Leather Science and Engineering

基　　金：国家科技支撑计划课题(2006BAC02A09)

摘　　要：以杨梅单宁、落叶松单宁和黑荆树单宁为鞣剂,模拟制革工艺条件,制得三种固载单宁皮粉材料(IT-HP),并将其作为成品革模型化合物,研究其所含单宁对Cr(Ⅵ)的还原吸附作用。系统研究了pH值、单宁含量以及初始Cr(Ⅵ)浓度对还原吸附作用的影响。结果表明:三种单宁对Cr(Ⅵ)的还原率和吸附率大小顺序为黑荆树单宁>杨梅单宁>落叶松单宁,其值均随pH值升高而降低;单宁对Cr吸附率随单宁含量的增加而增大。pH=3.0、初始Cr(Ⅵ)含量为50～100mg/kg时,IT-HP中5%的单宁可使残留在溶液中和吸附在IT-HP上的Cr(Ⅵ)含量均小于5mg/kg。Three kinds of tannin-immobilized hide powder(IT-HP) were synthesized by using bayberry tannin,larch tannin and black wattle tannin as tanning agents.The IT-HPs were employed as the models of leather,and the extents of reduction and adsorption of Cr(VI) by tannins on IT-HPs were investigated.The results indicated that the reduction and adsorption abilities of tannins were in the sequence of black wattle tannin > bayberry tannin > larch tannin,and the extents of reduction and adsorption decreased with ...

关 键 词：皮革 Cr(Ⅵ) 单宁 还原 吸附 

分 类 号：TS513[轻工技术与工程—皮革化学与工程]