Study on adsorption properties of surface-modified Aspergillus fumigatus on Congo Red

doi:10.11894/iwt.2018-0840

Abstract

Abstract:

The cationic surfactant cetyltrimethylammonium bromide(CTAB) was utilized to chemically modify the inactive Aspergillus fumigatus(AFB). The adsorption properties of AFB and modified AFB(MAFB) on the anionic dye Congo Red(CR) was comparatively studied. The results showed that both AFB and MAFB could effectively adsorb the CR in the solution. Compared with AFB, the adsorption effect of MAFB on CR was significantly enhanced. The adsorption process accorded with the pseudo-second-order kinetic model and the Freundlich isotherm model. The amino group was the leading group to adsorb CR, and hydroxyl and carboxyl groups played a certain role.

Key words: Aspergillus fumigatus, biosorption, Congo Red, cetyltrimethylammonium bromide (CTAB)

摘要：

采用阳离子表面活性剂十六烷基三甲基溴化铵（CTAB）对无活性烟曲霉菌体（AFB）进行化学修饰，对比研究了AFB和改性后的烟曲霉菌体（MAFB）对阴离子染料刚果红（CR）的吸附性能。结果表明，AFB和MAFB均可有效吸附溶液中的CR；相比于AFB，MAFB对CR的吸附效果明显增强。吸附过程符合伪二级动力学模型以及Freundlich等温线模型。氨基是吸附CR的主要基团，羟基和羧基则起着一定的作用。

关键词: 烟曲霉, 生物吸附, 刚果红, 十六烷基三甲基溴化铵

CLC Number:

X703

Xianchun Jin, Jianing Song. Study on adsorption properties of surface-modified Aspergillus fumigatus on Congo Red[J]. Industrial Water Treatment, 2019, 39(10): 74-77.

金显春, 宋嘉宁. 表面修饰烟曲霉对刚果红的吸附性能研究[J]. 工业水处理, 2019, 39(10): 74-77.

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URL: https://www.iwt.cn/EN/10.11894/iwt.2018-0840

https://www.iwt.cn/EN/Y2019/V39/I10/74

Figures/Tables 7

References 11

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温度/℃	17	27	37
Langmuir模型
AFB
q_max/（mg·g^-1）	64.103	66.657	79.923
K_L/（L·mg^-1）	0.120	0.114	0.105
R²	0.961	0.972	0.984
MAFB
q_max/（mg·g^-1）	85.763	90.909	96.154
K_L/（L·mg^-1）	0.196	0.190	0.181
R²	0.980	0.963	0.972
Freundlich模型
AFB
K_F/（mg·g^-1）	24.296	26.829	31.340
n	3.874	3.568	2.501
R²	0.999	0.999	0.999
MAFB
K_F/（mg·g^-1）	46.132	48.529	53.703
n	5.471	4.250	1.562
R²	0.999	0.999	0.999

温度/℃	17	27	37
Langmuir模型
AFB
q_max/（mg·g^-1）	64.103	66.657	79.923
K_L/（L·mg^-1）	0.120	0.114	0.105
R²	0.961	0.972	0.984
MAFB
q_max/（mg·g^-1）	85.763	90.909	96.154
K_L/（L·mg^-1）	0.196	0.190	0.181
R²	0.980	0.963	0.972
Freundlich模型
AFB
K_F/（mg·g^-1）	24.296	26.829	31.340
n	3.874	3.568	2.501
R²	0.999	0.999	0.999
MAFB
K_F/（mg·g^-1）	46.132	48.529	53.703
n	5.471	4.250	1.562
R²	0.999	0.999	0.999

	伪一级动力学模型			伪二级动力学模型
	q_e/（mg·g^-1）	k₁/min^-1	R²	q_e/（mg·g^-1）	k₂ /（g·mg^-1·min^-1）	R²
AFB	79.12（78.56）	0.193 6	0.982	79.12（79.16）	0.002 49	0.999
MAFB	98.71（96.78）	0.232 0	0.986	98.71（98.67）	0.002 93	0.999

	伪一级动力学模型			伪二级动力学模型
	q_e/（mg·g^-1）	k₁/min^-1	R²	q_e/（mg·g^-1）	k₂ /（g·mg^-1·min^-1）	R²
AFB	79.12（78.56）	0.193 6	0.982	79.12（79.16）	0.002 49	0.999
MAFB	98.71（96.78）	0.232 0	0.986	98.71（98.67）	0.002 93	0.999

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