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固定化双孢菇漆酶对萘酚绿B脱色的研究

2015-07-13夏文静李飞周惠等

安徽农业科学 2015年15期

夏文静 李飞 周惠等

摘要 [目的]研究固定化双孢菇漆酶对萘酚绿B的脱色效果。[方法]利用固定化的双孢菇漆酶对萘酚绿B进行脱色,研究了温度、萘酚绿B浓度、固定化漆酶用量、酸根离子以及金属离子对脱色效果的影响。[结果]当脱色温度为40 ℃,脱色时间为4 h,萘酚绿B浓度为60 mg/L时,脱色率可以达到96.6%。酸根离子中PO3-4、CO2-3、Cl-对脱色率有抑制效果,金属离子中Cu2+、Mg2+对脱色率有促进效果,脱色率可以达到99.3%和97.6%。Fe2+对脱色率有抑制,脱色率是不添加金属离子的27%。[结论]该研究可为萘酚绿B的脱色提供了一条新途径。

关键词 固定化漆酶;萘酚绿B;金属离子;酸根离子;脱色率

中图分类号 S188 文献标识码 A 文章编号 0517-6611(2015)15-220-02

The Decoloration of Naphthol Green B by Immobilized Laccase from Agaricus bisporus

XIA Wenjing, LI Fei, ZHOU Hui et al

(School of Biotechnology and Chemical Engineering, Taizhou College, Nanjing Normal University, Taizhou, Jiangsu 225300)

Abstract [Objective] The research aimed to study the decoloration effect of naphthol green B by immobilized laccase from Agaricus bisporus. [Method] Using the immobilized laccase from Agaricus bisporus to decolor naphthol green B, the effects of temperature, naphthol green B concentration, immobilized laccase usage, acidic group ion and metal ion on the decoloration were studied. [Result] When decoloration temperature was 40 ℃, and decoloration time was 4 h, and naphthol green B concentration was 60 mg/L, decoloration rate could reach 96.6%. In acidic group ions, PO3-4, CO2-3 and Cl- had inhibition effects on decoloration rate. In metal ions, Cu2+ and Mg2+ had promoting effect on decoloration, with decoloration rates of 99.3% and 97.6%, while Fe2+ had inhibition effect, which was 27% of decoloration rate not adding metal ions. [Conclusion] The research could provide a new channel for decoloration of naphthol green B.

Key words Immobilized laccase; Naphthol green B; Metal ion; Acidic group ion; Decoloration rate

目前,我国工业废水对环境的污染十分严重,尤其是染料废水的污染。每年产生的染料已经超过了7 000万t[1-2] 。国内使用的大多染料稳定性好、耐光、耐微生物腐蚀,因此排放到环境中的染料废水难被降解。漆酶能够催化许多芳香族化合物并有广泛的作用底物,具有很大的实际应用价值[3]。目前人们对漆酶的研究越来越多,漆酶成为环境保护用酶研究的热点。笔者利用筛选的双孢菇所产的漆酶对萘酚绿B进行脱色研究,为萘酚绿B的脱色提供了一条新途径。

1 材料与方法

1.1 材料

漆酶:南京师范大学泰州学院微生物实验室所产的杏鲍菇漆酶。

试剂:萘酚绿B、磷酸钠、碳酸钠、氯化钠、硫酸钠、硫酸铜、硫酸亚铁、硫酸铝、硫酸镁、硫酸钾、硫酸钠(国药)。

1.2 试验方法

1.2.1 100 mg/L的萘酚绿B的配制。称取0.01 g的萘酚绿B,用95%的乙醇溶解至10 ml,萘酚绿B的浓度为1 g/L,再用缓冲液柠檬酸钠稀释成100 mg/L的浓度。……

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