菌株XC6对10种染料的生物脱色作用

Decolorization of Various Dyes by Strain XC6

研究了菌株XC6对直接、分散、活性、酸性和碱性5大类染料的脱色性能。结果表明,最易脱色的为分散、直接和酸性染料,最难脱色的为碱性染料阳离子黄;而对于活性染料,有些极易脱色,有些却很难脱色。说明染料在生长菌体上的脱色取决于染料的结构与性质。对其脱色机理进行了初探。结果表明,菌株XC6在脱色过程中,染料先被吸附到菌体表面,然后富集到菌体内,在酶的作用下降解;活性绿还与机体内的某些成分发生反应。

In this paper, the biodecolorization capacities of strain XC6 to 10 kinds of dyes in dye wastewater, belonging to reactive, acidic, basic, direct and dispersed dye respectively, were studied that the results showed that the direct, the dispersed and dyes acidic could be completely decolorized by growing mycelia. But it was difficulted to decolorize the basic dye cationic yellow. While for the reactive dye, some were decolorized easily and others much slowly. The adsorptive decolorization capacity of growing mycelia on dye was determined by the molecular structure and characteristics of dye. In addition, the decolorization mechanism was explored by decolorization of the coloured strains with different chemical reagents and measuring the absorption curves before and after the decolorization process. The results indicated that the dyes were absorbed first to the surface of the strain mycelia, then enriched into its body and degraded by enzymes. The reactive green even was may reacted with some thing in the body of the strain to form macromolecule.