BIOSORPTION OF HEAVY METALS BY USING PRETREATED BIOMASS OF METAL-TOLERANT FUNGI
Abstract
- Soil samples were collected from selected area of Pathein Township during June to July, 2015. Fourteen different soil fungi were isolated by using physical treatment dilution method and soil plating method. All isolates were initially grown on PGA medium and selected heavy metals such as Cu2+, Cr6+ and Ni2+ tolerance activities were checked by plate diffusion method. In plate diffusion method, results of zone formation indicate the ability of the isolates as heavy metal-resistant or sensitive. Based on their zone of inhibition, the maximum tolerance levels of isolates were chosen. Four different fungi (OMA-4, OMA-9, OMA-11 and OMA-14) were found to possess the metal tolerance potential in terms of minimum inhibitory concentration (MIC). Moreover, functional group and elemental analysis of active surface of fungi were characterized by FT IR and EDXRF analyses. The metal-tolerant fungi were carried out to investigate the production of biomass by time course of incubation, effect of pH, effect of carbon source consumption and effect of nitrogen source consumption. The observed conditions were applied for the biosorption process by effect of solution pH, biomass dosage, metal ion concentration and contact time. Experimental results revealed that the isolated soil fungi have shown a high level of resistance to tested metals and which makes them attractive potential for their ability to remove metal ions.
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Year
- 2019
Author
-
Ohnmar Aye
Subject
- Chemistry
Publisher
- Myanmar Academy of Arts and Science (MAAS)