期刊
APPLIED BIOCHEMISTRY AND BIOTECHNOLOGY
卷 84-6, 期 -, 页码 1021-1038出版社
HUMANA PRESS INC
DOI: 10.1385/ABAB:84-86:1-9:1021
关键词
transition metal; animal fibrous protein; plant polyphenol
Removing and collecting heavy and rare metal ions from industrial effluents and waste aqueous solutions are important problems. Our previous studies showed that animal fibrous proteins (AFPs) such as hen eggshell membrane, chicken feather (CF), wool, and silk were stable and insoluble proteins and had an excellent ability to bind not only hard (Mn2+ and Fe3+) but also soft: (Ag+, Au+, Pd2+, Pt2+, and Hg2+) acids from aqueous solutions. In this study, we synthesized some adsorbents for transition (Cr6+, Mn2+, Co2+, Ni2+, and Cu2+) and heavy (Cd2+) metal ions from AFPs (gelatin, CF, and wool) and plant polyphenols (lignin and tannin) by heating a mixture of AFPs and plant polyphenols under acidic conditions. In batch experiments, pH profile, time dependency, and isotherm analysis were performed to determine binding properties of adsorbents for transition and heavy metal ions. Column experiments were also performed to remove copper ion from aqueous solution. The results showed that the new adsorbents were effective for collecting and removing transition and heavy metal ions from aqueous solutions.
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