Mechanism and Characteristics of Oil Recovery from Oily Sludge by Sodium Lignosulfonate Treatment

Ma, Ye; Yao, Mingzhu; Liu, Lu; Qin, Chengrong; Qin, Baicheng; Deng, Ningkang; Liang, Chen; Yao, Shuangquan

doi:10.1021/acsomega.1c04369

Cited by 9 publications

(7 citation statements)

References 47 publications

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“…The efficiency of oil removal using traditional SL treatment and DL treatment were compared. Traditional SL treatment was performed according to the method reported by Ma et al [ 24 ]. The specific method and process of DL treatment were described by Zhao et al [ 65 ].…”

Section: Methodsmentioning

confidence: 99%

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Efficient Separation and Recovery of Petroleum Hydrocarbon from Oily Sludge by a Combination of Adsorption and Demulsification

Yao

Liu

et al. 2022

IJMS

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The treatment of oily sludge (OS) can not only effectively solve environmental pollution but also contribute to the efficient use of energy. In this study, the separation effect of OS was analyzed through sodium lignosulfonate (SL)-assisted sodium persulfate (S/D) treatment. The effects of SL concentration, pH, temperature, solid–liquid ratio, revolving speed, and time on SL adsorption solubilization were analyzed. The effects of sodium persulfate dosage, demulsification temperature, and demulsification time on sodium persulfate oxidative demulsification were analyzed. The oil removal efficiency was as high as 91.28%. The results showed that the sediment was uniformly and finely distributed in the S/D-treated OS. The contact angle of the sediment surface was 40°, and the initial apparent viscosity of the OS was 56 Pa·s. First, the saturated hydrocarbons and aromatic hydrocarbons on the sediment surface were adsorbed by the monolayer adsorption on SL. Stubborn, cohesive oil agglomerates were dissociated. Sulfate radical anion (SO4−·) with a high oxidation potential, was formed from sodium persulfate. The oxidation reaction occurred between SO4−· and polycyclic aromatic hydrocarbons. A good three-phase separation effect was attained. The oil recovery reached 89.65%. This provides theoretical support for the efficient clean separation of oily sludge.

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Section: Methodsmentioning

confidence: 99%

“…The separation of OS using SL was investigated in our previous study. The oil removal efficiency was higher by 12.86% compared to using traditional sodium dodecyl sulfonate [ 24 , 25 ]. However, SL is a randomly branched polymer and differs from ordinary surfactants in that it cannot form a regular phase interface state.…”

Section: Introductionmentioning

confidence: 99%

Efficient Separation and Recovery of Petroleum Hydrocarbon from Oily Sludge by a Combination of Adsorption and Demulsification

Yao

Liu

et al. 2022

IJMS

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“…Ions, lignin sulfonates, and calcium chloride are the main chemical substitutes [ 14 , 15 ]. Chemical compounds bind soil particles, causing them to solidify inside soil pores, increasing soil strength [ 16 , 17 ] and decreasing permeability [ 18 , 19 ]. Compared with physical methods, chemical methods are generally more expensive and require sophisticated processes that disrupt the acid-base balance of the environment by considerably increasing the alkalinity of the soil.…”

Section: Introductionmentioning

confidence: 99%

The performance of partially substituted composite ester materials with weathered red-bed soil in ecological restoration

Liu,

Wu,

Liao

et al. 2024

PLoS ONE

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Ester materials have become a significant topic in ecological restoration because of their degradability and lack of pollution. However, these artificial materials have issues such as high resource consumption and high cost. Therefore, finding a scientific substitute for ester materials is crucial to reduce costs. This study proposes the use of weathered red-bed soil to partially replace ester materials. Orthogonal coupled compounding and ecological effect tests were performed to analyze the soil improvement mechanism based on the mineral composition, soil structure, and electrical conductivity properties of the weathered red-bed soil. The experimental findings indicated that the soil modified using ester materials exhibited improved strength, water retention, and aeration owing to changes in the soil structure. Plant germination and height increased by 55% and 37 mm, respectively, when using a ratio of 15 g/m2 absorbent ester material, 2.5 g/m2 adhesive ester material, and 5% weathered red-bed soil. Through this approach, the amount of ester material to be used could be further reduced by 75%. The weathered red-bed soil offers improved ecological effects by altering the physical, mechanical, and hydraulic properties of the soil structure. This study presents a theoretical foundation for ecological conservation using weathered red-bed soil as a substitute for certain ester materials.

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“…Oily sludge has become a serious environmental problem in many countries. It is reported that China produces about 3 million tons of oily sludge every year [2]. Due to the large amount of toxic substances such as petroleum hydrocarbons in oily sludge, it is listed as hazardous waste in many countries.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the treatment of oily sludge has become an urgent issue. Among the existing oily sludge treatment methods, solvent extraction method has a good application prospect with the advantages of simple operation, high efficiency and short treatment time [2]. However, a large amount of organic solvent needs to be consumed in the extraction process.…”

Section: Introductionmentioning

confidence: 99%

Evaluation and Prediction on the Effect of Ionic Properties of Solvent Extraction Performance of Oily Sludge Using Machine Learning

Zhu

et al. 2021

Molecules

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Oily sludge produced in the process of petroleum exploitation and utilization is a kind of hazardous waste that needs to be urgently dealt with in the petrochemical industry. The oil content of oily sludge is generally between 15–50% and has a great potential for oil resource utilization. However, its composition is complex, in which asphaltene is of high viscosity and difficult to separate. In this study, The oily sludge was extracted with toluene as solvent, supplemented by three kinds of ionic liquids (1-ethyl-3-methylimidazole tetrafluoroborate ([EMIM] [BF4]), 1-ethyl-3-methylimidazole trifluoro-acetate ([EMIM] [TA]), 1-ethyl-3-methylimidazole Dicyandiamide ([EMIM] [N(CN)2])) and three kinds of deep eutectic solutions (choline chloride/urea (ChCl/U), choline chloride / ethylene glycol (ChCl/EG), and choline chloride/malonic acid (ChCl/MA)). This experiment investigates the effect of physicochemical properties of the solvents on oil recovery and three machine learning methods (ridge regression, multilayer perceptron, and support vector regression) are used to predict the association between them. Depending on the linear correlation of variables, it is found that the conductivity of ionic liquid is the key characteristic affecting the extraction treatment in this system.

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Mechanism and Characteristics of Oil Recovery from Oily Sludge by Sodium Lignosulfonate Treatment

Cited by 9 publications

References 47 publications

Efficient Separation and Recovery of Petroleum Hydrocarbon from Oily Sludge by a Combination of Adsorption and Demulsification

Efficient Separation and Recovery of Petroleum Hydrocarbon from Oily Sludge by a Combination of Adsorption and Demulsification

The performance of partially substituted composite ester materials with weathered red-bed soil in ecological restoration

Evaluation and Prediction on the Effect of Ionic Properties of Solvent Extraction Performance of Oily Sludge Using Machine Learning

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