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Full-scale bioremediation of petroleum-contaminated soils via integration of co-composting

  • Soils, Sec 3 • Remediation and Management of Contaminated or Degraded Lands • Research Article
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Abstract

Purpose

Pollution from oil operations; exploration, drilling, transfer, transport, refinery and distribution reduce soil quality, and results in the removal of a large amount of soil from annual utilization cycles. Soil quality is an essential asset of sustainable development and is negatively affected by erosion and anthropogenic activity. Co-composting is a biological technique used in the bioremediation of soils, which was investigated in this study.

Materials and methods

This study focused on the remediation of 1200 m3 of saline contaminated soil from an oil-polluted operational area in Iran. The initial total petroleum hydrocarbon (TPH) content of the soil was between 6.9 and 17.1 g kg−1 and was contaminated with heavy oil. Initial water repellency of the soil was between 1500 and 12,500 S. The remediation procedure commenced with trials in which organic waste of a local sugarcane sugar factory, mixed urea, sugar, and compost mixtures was added to contaminated soils.

Results

After irrigation and aeration of piles of organic materials and soil over 3 months of operation, the TPH reduced from 4.86, 6.52, and 9.89 to 0.068, 0.080, and 0.109 g kg−1, in the moderately, highly, and very highly polluted soil piles respectively. At the end of the remediation project, following gas chromatography analysis of contaminant content, and in accordance with governmental authorities, recovered soils were added to the surrounding environment to the support growth of the natural ecosystem.

Conclusion

Soil recovery and remediation utilizing valorization and complimentary local industries have a transferable quality that may be adapted to additional vulnerable sites in droughted and variable edaphic and climatic conditions.

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Acknowledgements

This manuscript is a description of a method for “oil-contaminated bioremediation.” The project was financially supported by Parnian Sazeh Chehelsotoun Co. (PSCCO) in Ahvaz, Iran. We graciously acknowledge the support of Mr. Reza Parnian (CEO of PSCCO) and Mr. Mohamad Zaki-Pour (Supervisor of the project, AOGC).

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Correspondence to Amir Parnian.

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The authors declare no competing interests.

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Responsible editor: Yanzheng Gao

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Parnian, A., Parnian, A., Pirasteh-Anosheh, H. et al. Full-scale bioremediation of petroleum-contaminated soils via integration of co-composting. J Soils Sediments 22, 2209–2218 (2022). https://doi.org/10.1007/s11368-022-03229-5

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  • DOI: https://doi.org/10.1007/s11368-022-03229-5

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