TY - JOUR
T1 - Soil treatment using a biosurfactant producing bacterial consortium in rice fields contaminated with oily sludge— a sustainable approach
AU - Patowary, Kaustuvmani
AU - Bhuyan, Tamanna
AU - Patowary, Rupshikha
AU - Mohanta, Yugal Kishore
AU - Panda, Bibhu Prasad
AU - Deka, Suresh
AU - Islam, Nazim Forid
AU - Joshi, Sanket J.
AU - Sarma, Hemen
N1 - Publisher Copyright:
© 2022 Elsevier Inc.
PY - 2023/3/1
Y1 - 2023/3/1
N2 - A consortium of two biosurfactant-producing bacteria (Bacillus pumilus KS2 and Bacillus cereus R2) was developed to remediate petroleum hydrocarbon-contaminated paddy soil. Soil samples from a heavily contaminated rice field near Assam's Lakwa oilfield were collected and placed in earthen pots for treatment. After each month of incubation, 50 g of soil from each earthen pot was collected, and the soil TPH (ppm) in each sample was determined. The extracted TPH samples were analysed by Gas chromatography-mass spectrometry (GC-MS) to confirm microbial degradation. The soil samples were examined for changes in pH, conductivity, total organic content (TOC), water holding capacity, and total nitrogen content in addition to TPH degradation. An increasing trend in TPH degradation was observed with each passing month. After six months of treatment, the sample with the lowest initial TPH concentration (1735 ppm) had the highest degradation (91.24%), while the soil with the highest amount of TPH (5780 ppm) had the lowest degradation (74.35%). A wide range of aliphatic hydrocarbons found in soil samples was degraded by the bacterial consortium. The soil samples contained eight different low- and high-molecular-weight PAHs. Some were fully mineralized, while others were significantly reduced. With the decrease in the TPH level in the polluted soil, a significant improvement in the soil's physicochemical qualities (such as pH, electrical conductivity, total organic content, and water-holding capacity) was observed.
AB - A consortium of two biosurfactant-producing bacteria (Bacillus pumilus KS2 and Bacillus cereus R2) was developed to remediate petroleum hydrocarbon-contaminated paddy soil. Soil samples from a heavily contaminated rice field near Assam's Lakwa oilfield were collected and placed in earthen pots for treatment. After each month of incubation, 50 g of soil from each earthen pot was collected, and the soil TPH (ppm) in each sample was determined. The extracted TPH samples were analysed by Gas chromatography-mass spectrometry (GC-MS) to confirm microbial degradation. The soil samples were examined for changes in pH, conductivity, total organic content (TOC), water holding capacity, and total nitrogen content in addition to TPH degradation. An increasing trend in TPH degradation was observed with each passing month. After six months of treatment, the sample with the lowest initial TPH concentration (1735 ppm) had the highest degradation (91.24%), while the soil with the highest amount of TPH (5780 ppm) had the lowest degradation (74.35%). A wide range of aliphatic hydrocarbons found in soil samples was degraded by the bacterial consortium. The soil samples contained eight different low- and high-molecular-weight PAHs. Some were fully mineralized, while others were significantly reduced. With the decrease in the TPH level in the polluted soil, a significant improvement in the soil's physicochemical qualities (such as pH, electrical conductivity, total organic content, and water-holding capacity) was observed.
KW - Bacillus cereus, hydrocarbon contamination
KW - Bacillus pumilus
KW - Biosurfactant
KW - PAHs
KW - TPH
KW - Biodegradation, Environmental
KW - Sewage/microbiology
KW - Soil/chemistry
KW - Soil Microbiology
KW - Petroleum/analysis
KW - Hydrocarbons
KW - Bacteria/metabolism
KW - Soil Pollutants/analysis
KW - Oryza
UR - http://www.scopus.com/inward/record.url?scp=85145693670&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85145693670&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/cff8b954-5472-3b68-8164-06472eb65128/
U2 - 10.1016/j.envres.2022.115092
DO - 10.1016/j.envres.2022.115092
M3 - Article
C2 - 36587720
AN - SCOPUS:85145693670
SN - 0013-9351
VL - 220
JO - Environmental Research
JF - Environmental Research
M1 - 115092
ER -