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Sustainable long-alkanes biodegradation with moderate pre-oxidation in soil.
- Source :
- Soil & Sediment Contamination; 2023, Vol. 32 Issue 2, p194-214, 21p
- Publication Year :
- 2023
-
Abstract
- This study aimed to investigate the mechanism of sustainable biodegradation of long-alkanes with moderate pre-oxidation in soil. Moderate pre-oxidation was performed with two consecutive doses of 1.35 mL 30% of H<subscript>2</subscript>O<subscript>2</subscript> (225 mM) in two soil. After moderate pre-oxidation, the experiment of sustainable biodegradation of long-alkanes during 80 d was conducted. Then, long-alkanes relative activity coefficient (K), NH<subscript>4</subscript><superscript>+</superscript>-N allocation (G) and the performance of hydrocarbon degraders (E) was calculated. Long-alkanes were sustainably biodegraded with moderate pre-oxidation (1765 mg/kg, 2438 mg/kg and 2672 mg/kg). Long-alkanes biodegradation (8723 mg/kg) with moderate pre-oxidation was 2.5 folds of excessive pre-oxidation. The average increment in long-alkanes biodegradation with moderate pre-oxidation was 30–38% as K values improved (0.28–0.48). The bacterial destruction D decreased to 14–17% and hydrocarbon degraders activity increased to 0.065 mol CO<subscript>2</subscript>/kg with moderate pre-oxidation. Basidiomycota and Acinetobacter sp. showed high tolerance with moderate pre-oxidation and remained dominant strains throughout the bioremediation. NH<subscript>4</subscript><superscript>+</superscript>-N consumption played an essential role as nutrients in growth of hydrocarbon degraders (Basidiomycota and Acinetobacter sp.). Then, high and sustained E was achieved with decreased D and elevated hydrocarbon degraders activity, resulting in high K. So, long-alkanes sustainably increasing biodegraded under high E assisted with elevated G with moderate pre-oxidation. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 15320383
- Volume :
- 32
- Issue :
- 2
- Database :
- Complementary Index
- Journal :
- Soil & Sediment Contamination
- Publication Type :
- Academic Journal
- Accession number :
- 161160653
- Full Text :
- https://doi.org/10.1080/15320383.2022.2066627