ISOLATION AND CHARACTERIZATION OF A STAIN OF MERCURY VOLATIZING FUNGUS

SI Guang-zheng; YANG Qing-chen; DONG Jia; YAN Tian-ge; CHANG Jun-jun; CHEN Jin-quan

doi:10.13205/j.hjgc.202009040

Volume 38 Issue 9

Nov. 2020

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Article Navigation > ENVIRONMENTAL ENGINEERING > 2020 > 38(9): 247-252

SI Guang-zheng, YANG Qing-chen, DONG Jia, YAN Tian-ge, CHANG Jun-jun, CHEN Jin-quan. ISOLATION AND CHARACTERIZATION OF A STAIN OF MERCURY VOLATIZING FUNGUS[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 247-252. doi: 10.13205/j.hjgc.202009040

Citation:

SI Guang-zheng, YANG Qing-chen, DONG Jia, YAN Tian-ge, CHANG Jun-jun, CHEN Jin-quan. ISOLATION AND CHARACTERIZATION OF A STAIN OF MERCURY VOLATIZING FUNGUS[J]. ENVIRONMENTAL ENGINEERING , 2020, 38(9): 247-252. doi: 10.13205/j.hjgc.202009040

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ISOLATION AND CHARACTERIZATION OF A STAIN OF MERCURY VOLATIZING FUNGUS

doi: 10.13205/j.hjgc.202009040

1. Key Laboratory of Plateau Mountain Ecology and Degraded Environment Rehabilitation, College of Ecology and Environment, Yunnan University, Kunming 650091, China;
2. Institute of International Rivers and Eco-Security, Yunnan University, Kunming 650091, China

Received Date: 2019-07-09

Abstract

Abstract

In recent years, soil contaminated with mercury (Hg) has become serious problem on earth, endangering the environment and human health. Therefore, it is urgent to develop a reasonable and effective method to remediate it. Some microorganisms have capacity of adsorption and volatilization for Hg(Ⅱ), and can be applied to the bioremediation of Hg-contaminated environments. In this study, a highly Hg-resistant fungus (DC-F9) was isolated from the heavy metal-contaminated soil with a minimum inhibitory concentration (MIC) of 160 mg/L. The strain belonged to the genus Aspergillus by the phylogenetic analysis of its ITS sequence. In the medium supplemented with Hg(Ⅱ) concentration of 5 mg/L, the volatilization rate, adsorption rate and total removal rate of Hg(Ⅱ) were 36.8%, 58.4%, 95.2% respectively; and they were 45.4%, 40.2%, 85.6% respectively at Hg(Ⅱ) concentration of 10 mg/L. The strain exhibited a variety of physiological changes in response to mercury stress by FTIR analyses. These results showed that the DC-F9 had potentials of bioremediation for Hg-contaminated environment.
- Hg-contaminated soil,
- volatilization,
- fungi,
- adsorption

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References(29)

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