Efficient mycosorption of anionic azo dyes by Mucor circinelloides: Surface functional groups and removal mechanism study

被引:40
作者
Azin, Ehsan [1 ]
Moghimi, Hamid [1 ]
机构
[1] Univ Tehran, Coll Sci, Sch Biol, Dept Microbial Biotechnol, Tehran 1417864411, Iran
来源
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING | 2018年 / 6卷 / 04期
关键词
Azo dye; Biosorption; Chitin; Chitosan; Functional groups; Mycosorption; REACTIVE BLACK 5; CONGO-RED; AQUEOUS-SOLUTION; HEAVY-METALS; WASTE-WATER; ADSORPTION MECHANISM; ASPERGILLUS-NIGER; RHIZOPUS-ARRHIZUS; BIOSORPTION; BIOMASS;
D O I
10.1016/j.jece.2018.06.002
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
In this study, fungal isolates were purified from contaminated soil and dyestuff wastewater samples. Among 58 fungal isolates, Mucor circinelloides with 94% Congo red removal capacity at the concentration of 150 mg/L was selected as the superior isolate. Comparison of we and dried we biomass showed that dye adsorption of wet biomass was 39% more than that of dried we biomass. The maximum Langmuir adsorption capacity was calculated 169.49 mg dye/g we biomass of M. circinelloides. Pretreatment of biomass with sodium hydroxide enhanced dye removal for 19%. Acetone 50% and 0.1 M acetic acid had the highest and the less effect on desorption of dye molecules from fungal cells, respectively. Light and scanning microscopy imaging' Fourier transform infrared spectroscopy, pretreatment and zeta potential analysis indicated that dye removal was performed through biosorption process and hydroxyl and amine groups in the cell wall polymers have the main role in dye biosorption. M. circinelloides could produce crude chitin as 57% of its dry biomass. Chitin and chitosan in zygomyceta cell wall such as Mucor genus are probably main adsorption contributing surface polymers.
引用
收藏
页码:4114 / 4123
页数:10
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