Bioaugmentation-assisted bioremediation and kinetics modelling of heavy metal-polluted landfill soil

Bioaugmentation-assisted bioremediation and kinetics modelling of heavy metal-polluted landfill soil

The research is aimed to conduct onsite bioremediation of heavy metal-impacted landfill soil using fungal consortium. The setup involved treatment (soil augmented with fungal consortium) and control (soil without fungal augmentation). The experiment was conducted for 100 days and monitored on Day 20...

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Bibliographic Details
Published in:International journal of environmental science and technology (Tehran) Vol. 19; no. 7; pp. 6729 - 6754
Main Authors: Hassan, A., Pariatamby, A., Ossai, I. C., Ahmed, A., Muda, M. A., Wen, T. Z., Hamid, F. S.
Format: Journal Article
Language:English
Published: Berlin/Heidelberg Springer Berlin Heidelberg 01-07-2022
Subjects:
Aquatic Pollution
Earth and Environmental Science
Ecotoxicology
Environment
Environmental Chemistry
Environmental Science and Engineering
Original Paper
Soil Science & Conservation
Waste Water Technology
Water Management
Water Pollution Control
Consortium
Enzyme activity
Leachate
Filamentous fungi
FTIR
Contamination
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Summary:The research is aimed to conduct onsite bioremediation of heavy metal-impacted landfill soil using fungal consortium. The setup involved treatment (soil augmented with fungal consortium) and control (soil without fungal augmentation). The experiment was conducted for 100 days and monitored on Day 20, Day 60, and Day 100. The targeted metals removed from the soil were As, Cr, Cu, Fe, Mn, Ni, Pb, and Zn. The highest metal removal was in bioaugmented soil, with 67% Mn, 67% Ni and 66% Zn removed. The enzyme activities were highest in the treated soil, and the maximum for urease, dehydrogenase, invertase, and acid phosphatase was 2.9 mg NH 4 -N g −1 dry soil 3 h −1 , 1.97 mg TPF g −1 dry soil 24 h −1 , 2.5 mg glucose g −1 dry soil h −1 , and 2.5 µmol PNP g −1 dry soil h −1 , respectively. The results of Fourier transform infrared revealed the presence of thiols, thioethers, disulphides (780–686 cm −1 ), amines (3441–3374 cm −1 ), phosphates (913 cm −1 ), methyl (1422 cm −1 ), and hydroxyl groups (3526—3695 cm −1 ) which supported the proposed mechanisms of the metal removal. The maximum rates of metal removal in the treated soil were As (0.0105/day), Mn (0.0111/day), Ni (0.0110/day), and Zn (0.0108/day). All coefficients of determination were high with the maximum as 0.9996 and 0.9994 for Fe and As, respectively. Bioaugmentation using blended fungi was efficient in enhancing the metal removal from the soil. It is presumed that bioaugmentation can serve as an effective approach for enhancing the clean-up of metal-contaminated soil.
ISSN:1735-1472
1735-2630
DOI:10.1007/s13762-021-03626-2