Treatment of Oily Wastewater with Iron-Carbon Internal Electrolysis Process Enhanced by Ultrasonic

Song-jiang, MA; Wu, Nianfen; Ma, Qianli; Fang-wen, LI; Yang, Juan; Li, Duo; Li, Jun

doi:10.1166/asl.2013.4605

Cited by 4 publications

(2 citation statements)

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“…Many strategies, including the gravity separation, coalescence technology, filtration/membrane separation, − absorption, air flotation, coagulation sedimentation, electrolysis process, ultrasonic treatment, , biological treatment, , etc., have been widely adopted to separate the oil from the O/W emulsions. However, most of the separation technologies are very costly, energy-intensive, complex, and time-consuming.…”

Section: Introductionmentioning

confidence: 99%

Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets

et al. 2015

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Seeking highly-efficient, rapid, universal and low-cost demulsification materials to break up the crude/heavy oil-in-water emulsion and emulsified oily wastewater at ambient condition has been the goal of petroleum industry. In this work, an amphiphilic material, graphene oxide nanosheets (GO), was introduced as a versatile demulsifier to break up the oil-in-water emulsion at room temperature. It was encouraging to find that the small oil droplets in the emulsion quickly coalesced to form the oil phase and separated with the water within a few minutes. The demulsification tests indicated that the residual oil in separated water samples were as low as ∼30 mg/L corresponding to a demulsification efficiency over 99.9% at an optimum GO dosage. More importantly, GO is not only useful for ordinary crude oil emulsion, but also can be used to break up the extra heavy oil emulsion. Effect of the 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 2 emulsion pH on the demulsification was also investigated. It was interesting to find that the distribution of GO either in oil or in water phase after demulsification was dependent on the pH value of the solution, which was attributed to the pH-dependent amphiphilicity of GO. The prominent demulsification ability of GO was attributed to the strong adsorption between the GO nanosheets and molecules of asphaltenes/resins driven by π-π interaction and/or n-π interaction. The findings in this work indicate that the GO nanosheets is a simple, high-efficient and universal demulsifier to separate the oil from the crude/heavy oil-in-water emulsions at ambient condition, which shows a good application prospect in oil industry.

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Section: Introductionmentioning

confidence: 99%

Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets

et al. 2015

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“…Zhong 2010), but this approach has problems of high cost and di cult regeneration. In terms of absolute content, only the method of ozone oxidation in investigated samples can minimize the concentration of petroleum pollutants in water (0.19 mg/L;Ma et al 2013). The key to the removal of emulsi ed oil in mine water is to break the "protective" boundary membrane of tyrosine components, which is called "demulsi cation".…”

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confidence: 99%

Study on the occurrence characteristics and removal of DOM based on the mine water treatment station

Dong

Yang

Huang

2022

Preprint

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In order to find out the status of organic pollutants in coal mine area of Ordos Basin in northwest China, we used an excitation emission matrix combined with parallel factor analysis to study the compositional characteristics and fluorescence intensity of dissolved organic matter (DOM) in mine water. In this way, we found that the DOM in the Mongolia-Shaanxi border mining area of Ordos Basin has four main components: two that resemble fulvic acid (C1/C3), a protein-like tryptophan substance (C2), and a protein-like tyrosine substance (C4). The fluorescence intensity of the fulvic acid-like component increased from 334.73 a.u to 440.33 a.u after treatment, and the fluorescence intensity of the protein-like tyrosine-component decreased from 330.18 a.u to 295.78 a.u. And then we investigated the removal efficiency of DOM and other pollution in the Caojiatan mine water treatment plant’s coagulation - filter – ultrafiltration process. In this process, the removal efficiency of the protein-like tryptophan components reaches 90%, while that of chemical oxygen demand / NO2− and the total organic carbon is about 50%. The removal efficiency of the Cu2+ and F−is less than 30%, and almost none of the protein-like tyrosine components, electrical conductivity, total dissolved solids, and NH4+. Thus, It’s proved that aliphatic hydrocarbons such as alkanes and cycloalkanes in mine water were removed in the treatment process, whereas macromolecular aromatic hydrocarbons and other groups were not removed. In the end, we put forward the ozone air flotation process, ozone effect makes the water of oxygen functional groups such as carboxyl, hydroxyl content increased, allowing more of the aluminum, iron, magnesium, and calcium ion complexing, precipitation, leading to desorption from the particulate organic matter, reduce the space steric hindrance and electrostatic repulsion, the effect of enhanced coagulation, Promote the condensation of particulate matter by means of adsorption bridge. This provides theoretical support for research on the source and fate of the carbon trajectory in the water cycle in a coal mine area and provides guidance on the removal of DOM from mine water.

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Trends in Sonochemical Treatment of Oily Wastewater

Al-Rubaiey

2024

Pet. Chem.

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Treatment of Oily Wastewater with Iron-Carbon Internal Electrolysis Process Enhanced by Ultrasonic

Cited by 4 publications

References 0 publications

Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets

Demulsification of Crude Oil-in-Water Emulsions Driven by Graphene Oxide Nanosheets

Study on the occurrence characteristics and removal of DOM based on the mine water treatment station

Trends in Sonochemical Treatment of Oily Wastewater

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