Soil contamination by waste transformer oil: A review

Tiwari, Richa; Agrawal, Pratibha S.; Bawa, S.; Karadbhajne, Vijay; Agrawal, Amit J

doi:10.1016/j.matpr.2022.07.403

Cited by 5 publications

(3 citation statements)

References 19 publications

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“…Soil contamination from oil can change the physical properties of the soil [25]. Therefore, we measured soil temperature (ST), soil moisture (SM), soil electrical conductivity (EC) near the soil collar, and soil CO 2 efflux (F c ).…”

Section: Soil Physical Propertiesmentioning

confidence: 99%

Impact of Three Chainsaw Lubricants on Forest Soil Bacterial Community, Soil Respiration and Seedling Growth

Kim,

Shin,

Kim

et al. 2023

Forests

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Lubricants are applied onto chainsaw blades to achieve their optimum cutting performance; however, during logging or timber operations, lubricants may penetrate the forest soil. The persistent organic pollutants in lubricants may cause environmental damage, and different types of lubricants vary in terms of their environmental impact. Hence, selecting appropriate lubricants for timber operations is important for sustainable forest management. In this study, the effects of three lubricant types—biodegradable oil (bio-oil), petroleum-based bar-and-chain oil (mineral oil), and petroleum-based recycled oil (recycled oil)—on soil health were evaluated. The study was conducted in a controlled nursery setting, simulating post-logging reforestation. Sixteen types of polycyclic aromatic hydrocarbons and the total petroleum hydrocarbon concentrations in the soil samples were analyzed. Bio-oil facilitated faster recovery from soil contamination, whereas mineral oil exhibited slow and incomplete recovery. Recycled lubricants appear to be more environmentally sustainable options, indicating lower long-term soil contamination risks than petroleum-based lubricants. From a productivity perspective, the lubricant that supported the growth of seedlings was bio-oil. The findings of our study contribute to responsible lubricant selection for enhancing the overall health and sustainability of forest ecosystems.

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Section: Soil Physical Propertiesmentioning

confidence: 99%

Impact of Three Chainsaw Lubricants on Forest Soil Bacterial Community, Soil Respiration and Seedling Growth

Kim,

Shin,

Kim

et al. 2023

Forests

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“…3,5 Currently, the global annual consumption of transformer oil exceeds 160 billion liters. Considering that waste oil could cause severe damage to water sources, soil, 6 and air within ecosystems, 7 recycling and reclamation of aged transformer oil is a more ideal choice compared to direct replacement. Methods for the reuse of transformer oil include incineration for energy recovery, 8 solvent extraction, and vacuum distillation for purification of waste oil.…”

Section: Introductionmentioning

confidence: 99%

K₂CO₃‐loaded γ‐Al₂O₃ for acid removal in waste transformer oil

Fei,

Dong,

Shi

et al. 2023

Asia-Pacific J Chem Eng

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Transformer oil plays a critical role in ensuring the insulation and normal operation of power transformers. However, during operation, the transformer oil would undergo oxidation and degradation, leading to the formation of acids and polar compounds that increase its acidity and degrade its performance. Hence, the recycling and regeneration of aged transformer oil is an essential practice in transformer maintenance, contributing significantly to the extension of a transformer's operational lifespan and the reduction of potential risks. Adsorption separation is a preferred method for regeneration, offering simplicity and high efficiency. This study focuses on impregnated γ‐Al2O3 as an adsorbent for acidity removal in waste transformer oil. We conducted static adsorption experiments to investigate the optimal loading amount of the active component and the best calcination temperature for acid removal. XRD technique is employed to monitor the phase changes of the carrier during the calcination process. BET analysis is used to observe variations in the specific surface area and pore volume of the adsorbent during the modification process. DTG‐TGA is utilized to assess the weight loss during the calcination process. FTIR is employed to observe changes in functional groups during modification and adsorption processes. Along with these investigations, a study is also carried out to assess the dynamic acid removal performance of the acid‐removing adsorbent loaded into a fixed bed. The findings contribute to the development of sustainable methods for regenerating transformer oil, ensuring efficient and environmentally friendly operations.

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“…The issue of soil contamination from waste transformer oil (WTO) can be avoided with the use of natural ester-based substances such as vegetable oil. In a recent report by Tiwari et al [ 17 ] on soil contamination caused by WTO, they highlighted the presence of heavy metals in WTO that affects the microbiological activity of soil and the adverse effects on human beings and other living things. However, one of the significant limitations of vegetable oil is the high viscosity value which limits the heat dissipation capacity.…”

Section: Introductionmentioning

confidence: 99%

Thermophysical Properties of Vegetable Oil-Based Hybrid Nanofluids Containing Al2O3-TiO2 Nanoparticles as Insulation Oil for Power Transformers

2022

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The massive demand in the electrical power sector has resulted in a large demand for reliable, cost efficient, and environmentally friendly insulation oil to reduce the dependency on mineral oil. The hybridization of nanoparticles in vegetable oil is a novel method to enhance the thermal properties of vegetable oil. This study focuses on the experimental investigation of the thermophysical properties of coconut oil, soybean oil, and palm oil-based hybrid nanofluids suspended with Al2O3-TiO2 nanoparticles at a mass concentration of 0.2, 0.4, and 0.6%. The ratio between Al2O3 and TiO2 nanoparticles was maintained constant at 50:50. The main purpose of the study is to evaluate the thermal conductivity, dynamic viscosity, and density of different vegetable base oils suspended with Al2O3-TiO2 in the temperature range of 30 to 60 °C. The influence of temperature on the augmentation of thermophysical properties for different vegetable oil-based hybrid nanofluids is investigated experimentally. The experimental results for thermal conductivity for the three types of base fluids show that the effect of nanoparticle mass concentration in thermal conductivity enhancement is less significant for temperatures more than 50 °C. The palm oil with a 0.6% Al2O3-TiO2 nanoparticle concentration exhibited the highest thermal conductivity with a 27.5% thermal conductivity enhancement relative to the base oil. The effect of nanofluid temperature on density and viscosity augmentation is more distinct compared with the impact of Al2O3-TiO2 nanoparticles concentrations. Among all three types of hybrid nanofluids, palm oil based nanofluids were found to have superior thermophysical properties compared with coconut oil and soybean oil, with the highest thermal conductivity of 0.628 W/m·k and lowest viscosity of 17.772 mPa·s.

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Soil contamination by waste transformer oil: A review

Cited by 5 publications

References 19 publications

Impact of Three Chainsaw Lubricants on Forest Soil Bacterial Community, Soil Respiration and Seedling Growth

Impact of Three Chainsaw Lubricants on Forest Soil Bacterial Community, Soil Respiration and Seedling Growth

K₂CO₃‐loaded γ‐Al₂O₃ for acid removal in waste transformer oil

Thermophysical Properties of Vegetable Oil-Based Hybrid Nanofluids Containing Al2O3-TiO2 Nanoparticles as Insulation Oil for Power Transformers

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Soil contamination by waste transformer oil: A review

Cited by 5 publications

References 19 publications

Impact of Three Chainsaw Lubricants on Forest Soil Bacterial Community, Soil Respiration and Seedling Growth

Impact of Three Chainsaw Lubricants on Forest Soil Bacterial Community, Soil Respiration and Seedling Growth

K2CO3‐loaded γ‐Al2O3 for acid removal in waste transformer oil

Thermophysical Properties of Vegetable Oil-Based Hybrid Nanofluids Containing Al2O3-TiO2 Nanoparticles as Insulation Oil for Power Transformers

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Product

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About

K₂CO₃‐loaded γ‐Al₂O₃ for acid removal in waste transformer oil