摘要
The silk sericin is the main residue in silk production and it is found to be a low cost and efficient bio-sorbent. In this study, sericin was characterized with various techniques including SEM （scanning electron micro- scope）, XRD, N2 physisorption, FTIR （Fourier transformed infrared spectroscopy） and XPS （X-ray photoelectron spectroscopy）. The nitrogen content of sericin was ca. 8.5 mmol.g-1 according to elemental analysis. Dye adsorption by sericin biosorbent was investigated with the acid yellow （AY）, methylene blue （MB） and copper （II） phthalocyanine-3,4＇4＂4＇＂-tetrasulfonic acid （CuPc） dyes from water. Sericin displayed large capacity for AY andCuPc adsorption with adsorption capacities of respectively 3.1 and 0.35 mmol.g-1, but it did not adsorbed methyl- ene blue dye. This selectivity is due to the basicity of amide groups in seriein biosorbents.
The silk sericin is the main residue in silk production and it is found to be a low cost and efficient biosorbent.In this study,sericin was characterized with various techniques including SEM(scanning electron microscope),XRD,N2 physisorption,FTIR(Fourier transformed infrared spectroscopy) and XPS(X-ray photoelectron spectroscopy).The nitrogen content of sericin was ca.8.5 mmol·g-1 according to elemental analysis.Dye adsorp-tion by sericin biosorbent was investigated with the acid yellow(AY),methylene blue(MB) and copper(II) phthalocyanine-3,4'4″4'″-tetrasulfonic acid(CuPc) dyes from water.Sericin displayed large capacity for AY and CuPc adsorption with adsorption capacities of respectively 3.1 and 0.35 mmol·g-1,but it did not adsorbed methylene blue dye.This selectivity is due to the basicity of amide groups in sericin biosorbents.
基金
Supported by the Hong Kong Research Grant Council(605009)
the Hong Kong Innovation Technology Fund(ITS/108/09FP)
the Environment and Conservation Fund(ECWW11EG02)
