Micro-macrobubbles interactions and its application in flotation technology for the recovery of high density oil from contaminated sands

Lim, Mee Wei; Lau, Ee Von; Poh, Phaik Eong

doi:10.1016/j.petrol.2017.11.064

Cited by 36 publications

(6 citation statements)

References 27 publications

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“…Gas bubbles-oil contaminants are aggregated on the surface where they are skimmed off (Tao, 2005). Lim, Lau, and Poh (2018), studied the interaction of micro and macro bubbles in floatation techniques for recovering oil from contaminated sandy soil in laboratory conditions. The oil recovery efficacy rate was approximately 70% from sandy soil.…”

Section: Physical Methodsmentioning

confidence: 99%

Different strategies and bio-removal mechanisms of petroleum hydrocarbons from contaminated sites

Ahmed¹,

Kumari²,

Singh³

2023

AGJSR

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PurposePetroleum hydrocarbons are naturally occurring flammable fossil fuels used as conventional energy sources. It has carcinogenic, mutagenic properties and is considered a hazardous pollutant. Soil contaminated with petroleum hydrocarbons adversely affects the properties of soil. This paper aim to remove pollutants from the environment is an urgent need of the hour to maintain the proper functioning of soil ecosystems.Design/methodology/approachThe ability of micro-organisms to degrade petroleum hydrocarbons makes it possible to use these microorganisms to clean the environment from petroleum pollution. For preparing this review, research papers and review articles related to petroleum hydrocarbons degradation by micro-organisms were collected from journals and various search engines.FindingsVarious physical and chemical methods are used for remediation of petroleum hydrocarbons contaminants. However, these methods have several disadvantages. This paper will discuss a novel understanding of petroleum hydrocarbons degradation and how micro-organisms help in petroleum-contaminated soil restoration. Bioremediation is recognized as the most environment-friendly technique for remediation. The research studies demonstrated that bacterial consortium have high biodegradation rate of petroleum hydrocarbons ranging from 83% to 89%.Social implicationsProper management of petroleum hydrocarbons pollutants from the environment is necessary because of their toxicity effects on human and environmental health.Originality/valueThis paper discussed novel mechanisms adopted by bacteria for biodegradation of petroleum hydrocarbons, aerobic and anaerobic biodegradation pathways, genes and enzymes involved in petroleum hydrocarbons biodegradation.

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Section: Physical Methodsmentioning

confidence: 99%

Different strategies and bio-removal mechanisms of petroleum hydrocarbons from contaminated sites

Ahmed¹,

Kumari²,

Singh³

2023

AGJSR

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“…With properties such as a high internal gas density [14], a large specific surface area, a spontaneously charged surface, and the ability to generate free radicals [15], they have been extensively used in promoting biological growth [16], improving the soil environment [17,18], wastewater treatment [19], targeted drug delivery [20], and ultrasonography [21]. At present, micro-/nano-bubble technology has shown good cleaning effects on excavated porcelain with hard adherents on the surface [22], fruits and vegetables with microbial contamination on the surface [23,24], oily soil [25], membrane contaminants [26], and grease on metal surfaces [27,28], etc. Here, we study the cleaning effect of water containing micro-/nanobubbles on the 3D-printed products of polymers.…”

Section: Introductionmentioning

confidence: 99%

Green Cleaning of 3D-Printed Polymeric Products by Micro-/Nano-Bubbles

et al. 2023

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3D printing technology has been used to directly produce various actual products, ranging from engines and medicines to toys, especially due to its advantage in producing items of complicated, porous structures, which are inherently difficult to clean. Here, we apply micro-/nano-bubble technology to the removal of oil contaminants from 3D-printed polymeric products. Micro-/nano-bubbles show promise in the enhancement of cleaning performance with or without ultrasound, which is attributed to their large specific surface area enhancing the adhesion sites of contaminants, and their high Zeta potential which attracts contaminant particles. Additionally, bubbles produce tiny jets and shock waves at their rupture, driven by coupled ultrasound, which can remove sticky contaminants from 3D-printed products. As an effective, efficient, and environmentally friendly cleaning method, micro-/nano-bubbles can be used in a range of applications.

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“…According to ISO 20480-1:2017, the diameter of fine bubbles is <100 μm and thus includes microbubbles (diameter 1–100 μm; MBs) and nanobubbles (or ultrafine bubbles, diameter <1 μm; NBs). Compared to larger bubbles, MBs and NBs have several distinguishing characteristics, such as a slow rising speed, a large specific surface area, and a hydrophobic and negatively charged surface; they are also associated with the generation of free radicals. − MBs and NBs have been used in a wide variety of applications, such as degradation of organic pollutants, − decontamination of sand/soil, ,, degreasing/reducing fouling of membranes, ,− enhanced flotation, , sterilization, , and bioprocess enhancement . In the cleaning field, Ikeura et al used ozone MBs to remove residual pesticide from vegetables and found that when MBs were generated by decompression they gave better results than when a gas–water circulation method was used.…”

Section: Introductionmentioning

confidence: 99%

Microbubbles for Effective Cleaning of Metal Surfaces Without Chemical Agents

Wang

Liao

et al. 2022

Langmuir

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Traditional cleaning methods involving surfactants and ultrasound generate large amounts of wastewater. Microbubbles offer a more eco-friendly technology for interface cleaning. Here, we explored the efficiency of microbubbles for cleaning oil from metal surfaces. Air microbubbles at concentrations as high as 10 6 particles/mL were generated by hydrodynamic cavitation. Under optimal conditions, cleaning efficiencies for the removal of oil from carbon-steel and stainless-steel surfaces were 78.5 and 49.8% after 15 min, respectively, compared to only 6.5 and 9.9% without microbubbles. Additionally, combining microbubble treatment with the ultrasonic method achieved a higher efficiency than ultrasonic cleaning alone, achieving an efficiency of 85.5% after 3 min compared to 69.0%. The mechanism of microbubble cleaning was determined using a fluorescence observation system, and a model was established to describe the cleaning process. The use of microbubbles produced less emulsified oil wastewater because the oil that attaches to the microbubble surface floats with the bubbles to the surface of the cleaning water, where it can be removed, allowing for water recycling. This novel microbubble cleaning technology, which both enhances cleaning efficiency and reduces wastewater production, represents a viable and eco-friendly option for degreasing processes.

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Micro-macrobubbles interactions and its application in flotation technology for the recovery of high density oil from contaminated sands

Cited by 36 publications

References 27 publications

Different strategies and bio-removal mechanisms of petroleum hydrocarbons from contaminated sites

Different strategies and bio-removal mechanisms of petroleum hydrocarbons from contaminated sites

Green Cleaning of 3D-Printed Polymeric Products by Micro-/Nano-Bubbles

Microbubbles for Effective Cleaning of Metal Surfaces Without Chemical Agents

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