Biosorption potency of Aspergillus niger for removal of chromium (VI)

被引：106

作者：

Srivastava, Shaili ^{[1
]}

Thakur, Indu Shekhar ^{[1
]}

机构：

[1] Jawaharlal Nehru Univ, Sch Environm Sci, New Delhi 110067, India

来源：

CURRENT MICROBIOLOGY | 2006年 / 53卷 / 03期

关键词：

D O I：

10.1007/s00284-006-0103-9

中图分类号：

Q93 [微生物学];

学科分类号：

071005 ; 100705 ;

摘要：

Aspergillus niger isolated from soil and effluent of leather tanning mills had higher activity to remove chromium. The potency of Aspergillus niger was evaluated in shake flask culture by absorption of chromium at pH 6 and temperature 30 degrees C. The results of the study indicated removal of more than 75% chromium by Aspergillus niger determined by diphenylcarbazide colorimetric assay and atomic absorption spectrophotometry after 7 days. Study of microbial Cr(VI) reduction and identification of reduction intermediates has been hindered by the lack of analytical techniques that can identify the oxidation state with subcellular spatial resolution. Therefore, removal of chromium was further substantiated by transmission electron microscopy (TEM), scanning electron microscopy (SEM), and energy-dispersive X-ray spectroscopy (EDX), which indicated an accumulation of chromium in the fungal mycelium.

引用

页码：232 / 237

页数：6

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