Landfarming operation of oily sludge in arid region—human health risk assessment

Hejazi, Ramzi Fouad; Husain, Tahir; Khan, Faisal

doi:10.1016/s0304-3894(03)00062-1

Cited by 72 publications

(44 citation statements)

References 7 publications

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“…According to Hejazi et al (2003), landfarming at the site poses risk of detrimental effects through the air pathway (through the inhalation exposure route) to site workers during the initial period of landfarming. Contaminated soils are excavated and spread on a pad with a built-in system to collect any 'leachate' or contaminated liquids that seep out of contaminant-soaked soil.…”

Section: Ecological Risk Managementmentioning

confidence: 99%

“…The petroleum products from the soil during landfarming are largely removed through volatilisation, biodegradation and adsorption (Morgan & Watkinson 1989;Devliegher & Verstraete 1996;Margesin et al 1999;Hejazi et al 2003). Lighter (more volatile) petroleum products like gasoline tend to be removed by volatilisation during landfarm aeration process and to a lesser extent, degraded by microbial respiration (EPA 1994).…”

Section: Introductionmentioning

confidence: 99%

“…The volatile organic compounds (VOCs) from the landfarm area can present air pollution problems if the treatment area is not properly covered to minimise the emissions (Hejazi et al 2003). Apart from the VOC emissions, other constraints faced by the rehabilitation practitioners considering landfarming as a treatment option include, requirements for large land area for treatment, availability of the pollutant degrading bacteria, effectiveness of the technology at high constituent concentration (more than 50,000 ppm), improved concentration reductions in cases requiring more than 95% of pollution reduction and the flexibility of the technology in integrating the removal of petroleum hydrocarbons with other contaminants that may occur with the petroleum products.…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Bioremediation of petroleum hydrocarbons through landfarming: Are simplicity and cost-effectiveness the only advantages?

Maila

Cloete

2004

Rev Environ Sci Biotechnol

104

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Section: Ecological Risk Managementmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Bioremediation of petroleum hydrocarbons through landfarming: Are simplicity and cost-effectiveness the only advantages?

Maila

Cloete

2004

Rev Environ Sci Biotechnol

104

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“…In recent years, most refineries treat oil sludge using conventional methods which includes; physical treatment (storage, landfilling, combustion and incineration in a rotary kiln, lime stabilization, stabilization and solidification) (Wright and Noordhius, 1991;Karamalidis and Voudrias, 2001;Bhattacharyy and Shekdar, 2003;Radetski et al, 2006;Beech et al, 2009;Liu et al, 2010), chemical treatment (oxidative thermal treatment, treatment with fly-ash, pyrolysis treatment and solvent extraction) (Bonnier et al, 1980;Atlas, 1984;Taiwo and Otolorin, 2009) and biological treatment (landfarming, bio-reactor treatment and composting) (Pereira-Neta, 1987;Piotrowski, 1991;Lees, 1996;Singh et al, 2001;Hejazi et al, 2003;Mahmoud, 2004;De-qing et al, 2007;Srinivasarao et al, 2011;Udotong et al, 2011;Besalatpour et al, 2011). Most of the physical and chemical methods require expensive equipments and high energy to treat the oil sludge.…”

Section: Treatment Technologies and Disposal Of Oil Sludgementioning

confidence: 99%

“…Proper landfarming practice has minimal impact on the environment (good site appearance, absence of odour, relatively low-cost compliance with sound industrial practices and government regulation, minimal residue disposal problems and compatibility of the method with the climate, location and type of sludge treated). Landfarming gained popularity over incineration and landfilling following its advantages such as low energy consumption, low risk of pollution of the surface and groundwater due to the immobility of hydrocarbons and metals through the soil (Hejazi et al, 2003;Besalatpour et al, 2011). Landfarming technique only lost its popularity when the USA Environmental Protection Agency (USEPA), issued the land disposal restriction conservation and recovery act (RCRA), establishing treatment standards under the land disposal restriction program (USEPA, 1997).…”

Section: Landfarmingmentioning

confidence: 99%

Biological degradation of oil sludge: A review of the current state of development

O¹,

Atagana²,

Thantsha³

2013

Afr. J. Biotechnol.

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Oil sludge is a thick viscous mixture of sediments, water, oil and hydrocarbons, encountered during crude oil refining, cleaning of oil storage vessels and waste treatment. Polycyclic aromatic hydrocarbons (PAHs), which are components of crude oil sludge, constitute serious environmental concerns, as many of them are cytotoxic, mutagenic and potentially carcinogenic. Improper management and disposal of oil sludge causes environmental pollution. The adverse effects of oil sludge on soil ecology and fertility have been of growing interest among environmental scientist and an important consideration in the development of efficient technologies for remediation of contaminated land, with a view to making such land available for further use. Oil sludge can be treated by several methods such as physical, chemical and biological processes. The biological processes are mostly cost effective and environmentally friendly, as they are easy to design and implement, as such they are more acceptable to the public. Compost, the product of biological breakdown of organic matter is a rich source of hydrocarbon-degrading microorganisms such as bacteria and fungi. These microorganisms can degrade the oil sludge to less toxic compounds such as carbon dioxide, water and salts. Compost bioremediation, the application of composting in remediation of contaminated environment, is beginning to gain popularity among remediation scientists. The success or failure of compost bioremediation depends on a number of factors such as nutrients, pH, moisture, aeration and temperature within the compost pile. The bioavailability and biodegradability of the substrate to the degrading microorganisms also contributes to the success of the bioremediation process. This is a review on the biological remediation technologies employed in the treatment oil sludge. It further assesses the feasibility of using compost technology for the treatment of oil sludge, as a better, faster and more cost effective option.

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Oily waste containing natural radionuclides: does it cause stimulation or inhibition of soil bacterial community?

Galitskaya

Gumerova

Ratering

et al. 2015

J. Plant Nutr. Soil Sci.

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Contamination with oily wastes containing natural radionuclides is a potential hazard for soil health and function. Our study aimed to reveal both structural and functional changes of the microbial community resistant to and able to decompose oily wastes in soil. To do this, we determined CO 2 efflux, microbial biomass (by the extraction-fumigation method), and community structure (by PCR-SSCP) for 120 d after application of radioactive oily wastes to the soil at the ratio 1:4. The addition of the waste resulted in an increase of the activity concentration of 226 Ra by 130 times (up to 643 Bq kg -1 ) and of 232 Th by 29 times (up to 254 Bq kg -1 ). The calculated weighted dose for the radionuclide 226 Ra was found to be below the values that are known to affect microorganisms. However, the cumulative effect of a repeated deposition of radioactive oily waste may result in an increase of the weighted dose up to an effective level. During the incubation, the hydrocarbon (HC) content of the waste-treated soil decreased from 156 to 54 g kg -1 of soil indicating intensive decomposition of added organics by soil microorganisms. The waste application, however, led to an inhibition of soil microbial biomass compared with the control (by 26-47%). Microbial respiration was stimulated in the first month of incubation and then decreased until the end of the incubation period (by up to 74% compared to the control). The qCO 2 was estimated to be 3-fold higher than the control on day 1 of incubation and equal to the control on day 120 of incubation. The bacterial diversity decreased in the contaminated soil compared with the control soil. The bacterial community structure was altered by domination of new oil degrader species belonging to the genera Dyella, Pseudoxanthomonas, Sinobacter, and Parvibaculum. Thus, disposal of radioactive petroleum waste strongly altered the structure of the microbial community resulting in the selection of resistant species able to decompose pollutants and also affected the community function (inhibition of microbial biomass and stimulation of respiration) which tended to stabilize after long-term incubation.

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Landfarming operation of oily sludge in arid region—human health risk assessment

Cited by 72 publications

References 7 publications

Bioremediation of petroleum hydrocarbons through landfarming: Are simplicity and cost-effectiveness the only advantages?

Bioremediation of petroleum hydrocarbons through landfarming: Are simplicity and cost-effectiveness the only advantages?

Biological degradation of oil sludge: A review of the current state of development

Oily waste containing natural radionuclides: does it cause stimulation or inhibition of soil bacterial community?

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