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铁道科学与工程学报

JOURNAL OF RAILWAY SCIENCE AND ENGINEERING

Vol. 16    No. 4    August 2006

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Interaction between pyrite and cysteine
LIU Jian-she(柳建设), WANG Zhao-hui(王兆慧),
LI Bang-mei(李邦梅), ZHANG Yan-hua(张艳华)

School of Resources Processing and Bioengineering, Central South University,
Changsha 410083, China

Abstract: The adsorption mechanism of cysteine on pyrite was studied by amounts adsorbed, FTIR and XRD measurements. The results obtained by adsorption experiment suggest that as the mass ratio of mineral to cysteine mp/mc is greater than 5, the amounts adsorbed on mineral is stable after adsorption for 15 min and cysteine adsorbing with mp/mc shows the same tendency. It can be inferred by its Langmuir-type adsorption isotherm that chemical interaction governs the entire adsorption process. The results from FTIR and XRD prove that the functional groups of cysteine appear with blue shift of their characteristic adsorption peak in FTIR spectrum; meanwhile, the lattice constant obviously decreases and the widening of crystal planes such as (210), (220) and (211) is found after cysteine adsorbing on mineral.

 

Key words: pyrite; cysteine; adsorption isotherm; adsorption mechanism; lattice constant

ISSN 1672-7029
CN 43-1423/U

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