A case study of petroleum degradation in different soil textural classes

Reginald Kogbara, Josiah M. Ayotamuno, Daniel C. Worlu, Isoteim Fubara-Manuel

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Background: Patents have been granted for a number of techniques for petroleum biodegradation including use of micro-organisms for degradation of hydrocarbon-based substances and for hydrocarbon degradation in oil reservoirs, but there is a dearth of information on hydrocarbon degradation in different soil textures. Objective: Hence, this work investigated the effects of different soil textures on degradation of petroleum hydrocarbons during a six-week period. Methods: Five soil textural classes commonly found in Port Harcourt metropolis, Nigeria, namely sand, loamy sand, sandy loam, silty clay and clay, were employed. The soils were contaminated with the same amount of crude oil and then remediated by biostimulation. Selected soil properties were monitored over time. Results: Bacterial numbers declined significantly in the fine soil textures after petroleum contamination, but were either unaffected or increased significantly in the coarser soil textures. Hydrocarbon losses ranged from 42% - 99%; the sandy loam had the highest, while the clay soil had the least total hydrocarbon content (THC) reduction. The total heterotrophic bacterial (THB) counts generally corroborated the THC results. Fold increase in bacterial numbers due to remediation treatment decreased with increasing clay content. Conclusion: The results suggest that higher sand than clay content of soil favours faster hydrocarbon degradation. Hydrocarbon degradation efficiency increased with silt content among soil groupings such as fine and coarse soils but not necessarily with increasing silt content of soil. Thus, there seems to be cut-off sand and clay contents in soil at which the effect of the silt content becomes significant.

Original languageEnglish
Pages (from-to)108-115
Number of pages8
JournalRecent Patents on Biotechnology
Volume9
Issue number2
Publication statusPublished - 1 Aug 2015
Externally publishedYes

Fingerprint

Petroleum
Soil
Crude oil
Hydrocarbons
Soils
Degradation
Clay
Silt
Sand
Textures
Oil and Gas Fields
Patents
Bacterial Load
Nigeria
Biodegradation
Remediation
clay
Oils
Contamination

Keywords

  • Bacteria count
  • Bioremediation
  • Biostimulation
  • Contaminated soil
  • Soil texture
  • Total hydrocarbon content

ASJC Scopus subject areas

  • Biotechnology
  • Bioengineering
  • Applied Microbiology and Biotechnology

Cite this

Kogbara, R., Ayotamuno, J. M., Worlu, D. C., & Fubara-Manuel, I. (2015). A case study of petroleum degradation in different soil textural classes. Recent Patents on Biotechnology, 9(2), 108-115.

A case study of petroleum degradation in different soil textural classes. / Kogbara, Reginald; Ayotamuno, Josiah M.; Worlu, Daniel C.; Fubara-Manuel, Isoteim.

In: Recent Patents on Biotechnology, Vol. 9, No. 2, 01.08.2015, p. 108-115.

Research output: Contribution to journalArticle

Kogbara, R, Ayotamuno, JM, Worlu, DC & Fubara-Manuel, I 2015, 'A case study of petroleum degradation in different soil textural classes', Recent Patents on Biotechnology, vol. 9, no. 2, pp. 108-115.
Kogbara, Reginald ; Ayotamuno, Josiah M. ; Worlu, Daniel C. ; Fubara-Manuel, Isoteim. / A case study of petroleum degradation in different soil textural classes. In: Recent Patents on Biotechnology. 2015 ; Vol. 9, No. 2. pp. 108-115.
@article{ef76a1885fc541f798fc82773b348c7e,
title = "A case study of petroleum degradation in different soil textural classes",
abstract = "Background: Patents have been granted for a number of techniques for petroleum biodegradation including use of micro-organisms for degradation of hydrocarbon-based substances and for hydrocarbon degradation in oil reservoirs, but there is a dearth of information on hydrocarbon degradation in different soil textures. Objective: Hence, this work investigated the effects of different soil textures on degradation of petroleum hydrocarbons during a six-week period. Methods: Five soil textural classes commonly found in Port Harcourt metropolis, Nigeria, namely sand, loamy sand, sandy loam, silty clay and clay, were employed. The soils were contaminated with the same amount of crude oil and then remediated by biostimulation. Selected soil properties were monitored over time. Results: Bacterial numbers declined significantly in the fine soil textures after petroleum contamination, but were either unaffected or increased significantly in the coarser soil textures. Hydrocarbon losses ranged from 42{\%} - 99{\%}; the sandy loam had the highest, while the clay soil had the least total hydrocarbon content (THC) reduction. The total heterotrophic bacterial (THB) counts generally corroborated the THC results. Fold increase in bacterial numbers due to remediation treatment decreased with increasing clay content. Conclusion: The results suggest that higher sand than clay content of soil favours faster hydrocarbon degradation. Hydrocarbon degradation efficiency increased with silt content among soil groupings such as fine and coarse soils but not necessarily with increasing silt content of soil. Thus, there seems to be cut-off sand and clay contents in soil at which the effect of the silt content becomes significant.",
keywords = "Bacteria count, Bioremediation, Biostimulation, Contaminated soil, Soil texture, Total hydrocarbon content",
author = "Reginald Kogbara and Ayotamuno, {Josiah M.} and Worlu, {Daniel C.} and Isoteim Fubara-Manuel",
year = "2015",
month = "8",
day = "1",
language = "English",
volume = "9",
pages = "108--115",
journal = "Recent Patents on Biotechnology",
issn = "1872-2083",
publisher = "Bentham Science Publishers B.V.",
number = "2",

}

TY - JOUR

T1 - A case study of petroleum degradation in different soil textural classes

AU - Kogbara, Reginald

AU - Ayotamuno, Josiah M.

AU - Worlu, Daniel C.

AU - Fubara-Manuel, Isoteim

PY - 2015/8/1

Y1 - 2015/8/1

N2 - Background: Patents have been granted for a number of techniques for petroleum biodegradation including use of micro-organisms for degradation of hydrocarbon-based substances and for hydrocarbon degradation in oil reservoirs, but there is a dearth of information on hydrocarbon degradation in different soil textures. Objective: Hence, this work investigated the effects of different soil textures on degradation of petroleum hydrocarbons during a six-week period. Methods: Five soil textural classes commonly found in Port Harcourt metropolis, Nigeria, namely sand, loamy sand, sandy loam, silty clay and clay, were employed. The soils were contaminated with the same amount of crude oil and then remediated by biostimulation. Selected soil properties were monitored over time. Results: Bacterial numbers declined significantly in the fine soil textures after petroleum contamination, but were either unaffected or increased significantly in the coarser soil textures. Hydrocarbon losses ranged from 42% - 99%; the sandy loam had the highest, while the clay soil had the least total hydrocarbon content (THC) reduction. The total heterotrophic bacterial (THB) counts generally corroborated the THC results. Fold increase in bacterial numbers due to remediation treatment decreased with increasing clay content. Conclusion: The results suggest that higher sand than clay content of soil favours faster hydrocarbon degradation. Hydrocarbon degradation efficiency increased with silt content among soil groupings such as fine and coarse soils but not necessarily with increasing silt content of soil. Thus, there seems to be cut-off sand and clay contents in soil at which the effect of the silt content becomes significant.

AB - Background: Patents have been granted for a number of techniques for petroleum biodegradation including use of micro-organisms for degradation of hydrocarbon-based substances and for hydrocarbon degradation in oil reservoirs, but there is a dearth of information on hydrocarbon degradation in different soil textures. Objective: Hence, this work investigated the effects of different soil textures on degradation of petroleum hydrocarbons during a six-week period. Methods: Five soil textural classes commonly found in Port Harcourt metropolis, Nigeria, namely sand, loamy sand, sandy loam, silty clay and clay, were employed. The soils were contaminated with the same amount of crude oil and then remediated by biostimulation. Selected soil properties were monitored over time. Results: Bacterial numbers declined significantly in the fine soil textures after petroleum contamination, but were either unaffected or increased significantly in the coarser soil textures. Hydrocarbon losses ranged from 42% - 99%; the sandy loam had the highest, while the clay soil had the least total hydrocarbon content (THC) reduction. The total heterotrophic bacterial (THB) counts generally corroborated the THC results. Fold increase in bacterial numbers due to remediation treatment decreased with increasing clay content. Conclusion: The results suggest that higher sand than clay content of soil favours faster hydrocarbon degradation. Hydrocarbon degradation efficiency increased with silt content among soil groupings such as fine and coarse soils but not necessarily with increasing silt content of soil. Thus, there seems to be cut-off sand and clay contents in soil at which the effect of the silt content becomes significant.

KW - Bacteria count

KW - Bioremediation

KW - Biostimulation

KW - Contaminated soil

KW - Soil texture

KW - Total hydrocarbon content

UR - http://www.scopus.com/inward/record.url?scp=84961744138&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84961744138&partnerID=8YFLogxK

M3 - Article

VL - 9

SP - 108

EP - 115

JO - Recent Patents on Biotechnology

JF - Recent Patents on Biotechnology

SN - 1872-2083

IS - 2

ER -