Effect of Woodchips on Bioremediation of Crude Oil-polluted Soil

Rapid population growth resulting in industrial proliferation and urbanization has led to the rapid increase in pollution of the environment. Paint industries in urban areas mostly channel their wastewater into streams and on land, which results in the pollution of the receiving environment. This study aims to determine the impact of effluent discharges from paint industries on the soils’ physicochemical properties and the clean-up of the polluted soil through monitored natural attenuation. Composite samples of paint-effluents and soils were collected from paint industries. Their bioattenuation levels and changes in their physicochemical properties were monitored over a six-month period. Fungal isolates from the effluents include Saccharomyces cerevisiae (20%), Rhodotorula species (15%), Aspergillus niger (25%), Aspergillus flavus (15%), and Penicillum notatum (25%), while the bacterial isolates include Staphylococcus aureus (30%), Bacillus sp. (20%), Klebsiella sp.(15%), Escherichia coli (15%), Salmonella sp. (10%), and Staphylococcus species (10%). The effluents showed slightly alkaline pH values while the soils showed slightly acidic pH values. There were significant reductions in the heavy metal contents of the effluent polluted soils as remediation time increased, thus reducing the toxicity of such soil environments. Monitored natural-attenuation methods should be employed and improved as a means of reducing the toxicity of effluents on the environment since they are cheap and effective compared to other methods.

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“…Microbiological examination of the effluents mixed with the virgin soil was done by using the previous method [18].…”

Section: Microbiological and Physicochemical Analyses Of Polluted Soilmentioning

confidence: 99%

Effects of Effluents’ Discharge from Some Paint Industries on Soil’s Physicochemical Properties and Bioattenuation of Polluted Soil

Chukwuma

Uchenna

Ogonna

et al. 2022

Ind. Domest. Waste Manag.

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“…The bacterial population was estimated using the soil extract agar medium [31]. The oil content of the polluted and remediated soil samples was determined through gas chromatography (GC) by using the toluene extraction method [32] and sonication water bath method [33]. The hydrocarbon content of the samples was determined using GC-mass spectrometry (MS)-Agilent 6890N GC, Santa Clara, USA, equipped with MS and a GC column (DB-5 MS 30 m × 0.25 mm and 0.25 µm).…”

Section: Characterisation Of Soil Poultry Droppings and Sunflower Smentioning

confidence: 99%

Study on a novel N-doped mesoporous carbon for the efficient removal of methylene blue from aqueous solution

Yao

Wang

Jiang

et al. 2020

Environmental Engineering Research

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To remediate crude oil-contaminated soil, poultry droppings and sunflower seed husk were incorporated at various concentrations. Initially, the pH, moisture content, total organic carbon (TOC), total nitrogen content, and bacterial population of soil, poultry droppings, and sunflower seed husk were determined. The initial bacterial population was 35 × 10 8 colony forming units/g soil (dry weight basis). The total petroleum hydrocarbon (TPH) content in crude oil-contaminated soil was 7,048.4 mg/kg, in which 857.9 mg/kg accounted for eicosane. Naphthalene and acenaphthalene were the two polyhydroxy aromatic hydrocarbons present in soil at low concentrations. After the amendment, the pH, moisture content, microbial population, and TPH content of soil were determined on days 20, 40, and 60. The TPH concentration was considerably decreased in the treatment T4 wherein 250 g of soil was mixed with 125 g of poultry droppings and 125 g of sunflower seed husk. The indigenous bacterial population was also increased tremendously. The dehydrogenase enzyme activity was increased in the amended soil (T4: 0.74 ± 0.06 µg TPF/g/h). After the treatment of soil, the germination percentage and vigour index of maize, lady's finger and tomato seeds were enhanced.

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“…They are normally found on land and in the sea. These microorganisms have been isolated from heavily oil-polluted reservoirs or a variety of soils and waters continuously exposed to hydrocarbons for several years [14,15]. In this work, we aimed to investigate the effects of petroleum pollution on soil physicochemical properties, microflora and ecotoxicity assessment using germination index of bean seeds.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of the Impact of Crude Oil Contamination on Soil's Physicochemical Characteristics, Micro-flora and Crop Yield

Okafor

2023

Trop. Aqua. Soil Pollut.

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The effects of crude oil pollution on soil physicochemical properties, microflora, and ecotoxicity were evaluated. Soil samples were contaminated with crude oil, and the effects of contamination on the physicochemical parameters, microflora, and growth index of bean (Phaseolus vulgaris) seeds were studied over a 6-month period. The heterotrophic bacteria isolated from the uncontaminated soil were Micrococcus, Klebsiella, Flavobacterium, Bacillus, Pseudomonas, and Serratia species, and the moulds included microbes such as Aspergillus niger, Fusarium, and Mucor sp. Petroleum contamination increased the pH of the soils to alkaline values while increasing the total nitrogen, organic carbon, and phosphorus contents. Electrical conductivity, nitrogen content, and phosphorus content were significantly reduced after petroleum contamination (p ˂ 0.05). The heavy metal contents of the contaminated soils decreased with increasing remediation time. Zinc, total nitrogen, total organic carbon, and electrical conductivity contents were statistically significantly different among samples throughout the bioremediation period (p ˂ 0.05). The ability of isolates to utilise hydrocarbons was highest for Pseudomonas and Bacillus species and lowest for Klebsiella and Serratia species. After a germination period of 12 days, a germination test showed that the bioattenuated polluted soil improved germination of bean seeds. Bioattenuation methods should be used and improved as a means of remediating petroleum-polluted sites because they are cost-effective and environmentally friendly.

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Effect of Woodchips on Bioremediation of Crude Oil-polluted Soil

Cited by 10 publications

References 0 publications

Effects of Effluents’ Discharge from Some Paint Industries on Soil’s Physicochemical Properties and Bioattenuation of Polluted Soil

Effects of Effluents’ Discharge from Some Paint Industries on Soil’s Physicochemical Properties and Bioattenuation of Polluted Soil

Study on a novel N-doped mesoporous carbon for the efficient removal of methylene blue from aqueous solution

Evaluation of the Impact of Crude Oil Contamination on Soil's Physicochemical Characteristics, Micro-flora and Crop Yield

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