Biosorption of Uranium from Aqueous Solution by Live and Dead Aspergillus niger

被引：1

作者：

Solat, Sana ^{[1
]}

Reza, Roostaazad ^{[2
]}

Soheila, Yaghmaei ^{[1
]}

机构：

[1] Sharif Univ Technol, Chem & Petr Engn Dept, Tehran 113651155, Iran

[2] Sharif Univ Technol, Tehran 113659465, Iran

来源：

JOURNAL OF HAZARDOUS TOXIC AND RADIOACTIVE WASTE | 2014年 / 18卷 / 03期

关键词：

Biosorption; Uranium; Aspergillus niger; Isotherm;

D O I：

10.1061/(ASCE)HZ.2153-5515.0000220

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The ability of live and dead biomass of indigenous Aspergillus niger was examined for the removal of uranium ( VI) from dilute aqueous solutions. The influences of different experimental parameters such as initial solution pH, initial uranium concentration, biomass concentration, and contact time were investigated. The results indicated that the maximum sorption of biomass was observed at pH 5 and pH 4, and biosorption equilibrium was established in 120 and 60 min, for live and dead biomass, respectively. Optimal biosorption was observed at concentrations of 0.2 and 0.3 g dry biomass per 100 mL for live and dead biomass, respectively. Langmuir and Freundlich models were well able to explain the sorption-equilibrium data with satisfactory correlation coefficients higher than 0.9 for both sorbents. Moreover, the Langmuir isotherm in linear form fit better for both live and dead biomass of A. niger. The kinetic study showed that the pseudosecond-order model was appropriate to describe the sorption process. (C) 2014 American Society of Civil Engineers.

引用

页数：7

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