Nanoparticles Show Promise in Cleaning Up Petroleum Waste Contamination

Strategic Insights -

Research conducted by scientists at the University of Peshawar in Pakistan has explored the potential of nanoparticles and bacterial consortiums in remediating soils contaminated with petroleum waste. The study found that a combination of oil-degrading bacteria and silver nanoparticles was able to increase the degradation rate of total petroleum hydrocarbons (TPHs) by 70% in just 20 days. The researchers also observed a significant increase in the bacterial population in contaminated soils, which was positively correlated with the degradation of TPHs.

Key Takeaways:

  • A combination of oil-degrading bacteria and silver nanoparticles was able to increase the degradation rate of TPHs by 70% in just 20 days.
  • The application of nanoparticles and fertilizer had non-significant effects on the consortium degradation potential.
  • Fertilizer alone or in combination with AgNPs and consortium slowed the rate of degradation of TPHs over a short period but subsequently accelerated the rate of degradation.
  • The bacterial consortium alone showed the maximum increase in the degradation of TPHs at 20 days.
  • The study found a positive correlation between TPH degradation and the 100-fold increase in bacterial population in contaminated soils.
  • The researchers used four oil-degrading strains, namely *Bacillus pumilus*, *Exiguobacterium aurantiacum*, *Lysinibacillus fusiformis*, and *Pseudomonas putida*, which were selected based on their in vitro hydrocarbon-degrading efficiency.
  • The study monitored the degradation rate of TPHs of the soil samples with GC-FID at different intervals of the incubation period (0, 5, 20, 60, 240 days).

Statistics:

  • 70% increase in TPH degradation with a consortium after 20 days of incubation.
  • 100-fold increase in bacterial population in contaminated soils.
  • 20 days: the optimal duration for the bacterial consortium to degrade TPHs.
  • 240 days: the duration of the incubation period.
  • 4 oil-degrading strains used in the study.

Sources:

  • "Comparative Analysis of Microbial Consortiums and Nanoparticles for Rehabilitating Petroleum Waste Contaminated Soils." Molecules, vol. 27, no. 1945, 2022, pp. 1945.
  • National Centre of Excellence in Geology, University of Peshawar, Peshawar 25130, Pakistan.
  • Shehla Sattar (corresponding author), Samina Siddiqui, Asim Shahzad, Asghari Bano, Muhammad Naeem, Rahib Hussain, Naeem Khan, Basit Latief Jan, Humaira Yasmin.