JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY
·
2023
·
IF 2.2
Jian Zhang,Shanshan Wang,Xiujun Wang,Bo Huang,Mingsheng Zuo,Hao Chen
Spontaneous imbibition is one of the important means to enhance oil recovery in low permeability reservoirs, and it has good field application effects. Through the interfacial tension (IFT), contact angle (CA), and adsorption experiments, the effects of SDBS surfactant on IFT and reservoir wettability were studied, and the adsorption rule of SDBS at the mineral surface was obtained. On this basis, the imbibition recovery and mechanism of cores with different permeability are studied. The study showed that in low permeability reservoir, gravity and capillary force are the main controlling factors of imbibition. In the early stage, gravity determines the recovery, because the imbibition rate is 2.75 times that dominated by capillary force. The capillary force can continue to produce oil in small pores, and the imbibition time is twice that of gravity, which determines the recovery in the late imbibition stage. Therefore, the synergistic effect of gravity and capillary force can optimize the imbibition recovery, in low permeability reservoirs. When the concentration of SDBS solution is CMC (0.1%), due to the mineral interface adsorbs, the capillary force decreases by 10.76%, and the adhesion work increases by 3.42 times, resulting in a decrease in the imbibition recovery. The imbibition driving force is different for different reservoir properties, which can be adjusted by adding a surfactant to change IFT and CA.
研究领域:
石油工程
·
界面化学
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产品关联
DOI
高影响因子
ENVIRONMENTAL RESEARCH
·
2025
·
IF 7.7
Ziju Yan,Yuchen Liu,Yuyun Chen,Fei Wang
This study presents the synthesis and application of a bifunctional modified magnetic chitosan microsphere (MCS-II) for the simultaneous removal of Cu 2+ and sodium dodecylbenzene sulfonate (SDBS) from electroplating wastewater. The adsorbent was functionalized with polyethyleneimine (PEI) and ethylenediaminetetraacetic acid (EDTA) and embedded with Fe 3 O 4 nanoparticles to enhance adsorption capacity and magnetic separability. Batch adsorption experiments demonstrated that MCS-II exhibited a maximum adsorption capacity of 141.0 mg/g for Cu 2+ (pH = 6, T = 55 °C) with a removal efficiency of 96 %, and a maximum adsorption capacity of 1632 mg/g for SDBS (pH = 2, T = 25 °C) with a removal efficiency of 95 %. Kinetic studies revealed that the adsorption processes for both pollutants followed pseudo-second-order kinetics, indicating chemisorption as the dominant mechanism. Isotherm analysis showed that Cu 2+ adsorption fitted the Langmuir model, suggesting monolayer coverage, while SDBS adsorption exhibited characteristics of both monolayer and multilayer adsorption. Thermodynamic parameters indicated that Cu 2+ adsorption was endothermic (ΔH > 0) and spontaneous (ΔG < 0), whereas SDBS adsorption was exothermic (ΔH < 0) and spontaneous (ΔG < 0). In binary systems, synergistic effects were observed, with SDBS enhancing Cu 2+ adsorption via additional binding sites, while Cu 2+ exerted minimal inhibition on SDBS removal. Characterization techniques (SEM, FT-IR, XPS, etc.) confirmed the successful incorporation of amino and carboxyl groups, which facilitated chelation with Cu 2+ and electrostatic/hydrophobic interactions with SDBS. Moreover, MCS-II demonstrated excellent recyclability and magnetic recovery: after 4 adsorption-desorption cycles, its Cu 2+ adsorption capacity remained at ∼85–92 % of the original, and SDBS removal rate stayed at ∼95 % through 5 cycles, maintaining high adsorption efficiency for practical application. This work provides a promising strategy for designing multifunctional adsorbents to treat complex wastewater containing both heavy metals and anionic surfactants, offering potential for practical environmental remediation applications.
研究领域:
环境科学
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材料化学
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水处理技术
·
吸附
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重金属修复
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表面活性剂去除
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产品关联
DOI
PubMed
高影响因子
GEOFLUIDS
·
2024
·Vol. 2024
·期 1
·9112308
·
IF 1.2
Hongmei Li,Yun Zhao,Jie Deng,Jing Xie,Weiqi Zhou,Yiting Liu,Luming Li,Futing Xia,Rui Qi
The optimization of coal dust management in fluidized mining environments is of paramount importance, yet it is currently impeded by a gap in understanding chemical dust suppression mechanisms. This study combines indoor experiments with molecular simulation to investigate the mechanisms by which three anionic surfactants with different hydrophilic and hydrophobic groups (SDBS, SDS, and SLS) influence coal wettability. Using hydrophobic bituminous coal as the experimental subject, basic physical and chemical properties are analyzed through proximate analysis, XRD, and FTIR. The effect of different surfactants on coal wettability is characterized based on sedimentation experiments, while the coal–surfactant–water three-phase model examines the equilibrium adsorption configuration, water molecule diffusion coefficient, and interaction energy in different adsorption systems. The surface free energy of coal dust and its components is measured before and after surfactant adsorption, verifying the adsorption-wetting mechanism of surfactants at the coal–water interface. Results show that anionic surfactants enhance wettability through a bidirectional adsorption mechanism at the coal–water interface: the hydrophobic tail adheres to the coal surface via van der Waals forces, while the hydrophilic head faces the water phase, driven by electrostatic and hydrogen bonding interactions. This coordinated adsorption process alters water diffusion and the surface free energy of coal, thereby improving wettability. SDBS, due to its benzene ring, significantly amplifies the bidirectional adsorption effect, achieving the most substantial improvement in coal dust wettability. The findings provide a robust theoretical framework for developing dust control strategies in fluidized mining operations, advancing the field toward more efficient and sustainable mining practices.
研究领域:
矿业工程
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化学工程
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计算科学
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DOI
高影响因子
Soft Matter
·
2014
·Vol. 10
·期 30
·5463-5471
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IF 4.151
Nan Sun,Lijuan Shi,Fei Lu,Shuting Xie,Liqiang Zheng
The phase behavior of a kind of pseudogemini surfactant in aqueous solutions, formed by the mixture of sodium dodecyl benzene sulfonate (SDBS) and butane-1,4-bis (methylimidazolium bromide) ([mim-C4-mim]Br2) or butane-1,4-bis(methylpyrrolidinium bromide) ([mpy-C4-mpy]Br2) in a molar ratio of 2 : 1, is reported in the present work. When [mim-C4-mim]Br2 or [mpy-C4-mpy]Br2 is mixed with SDBS in aqueous solutions, one cationic [mim-C4-mim]Br2 or [mpy-C4-mpy]Br2 molecule “bridges” two SDBS molecules by noncovalent interactions (e.g. electrostatic, π–π stacking, and σ–π interactions), behaving like a pseudogemini surfactant. Vesicles can be formed by this kind of pseudogemini surfactant, determined by freeze-fracture transmission electron microscopy (FF-TEM) or cryogenic-transmission electron microscopy (cryo-TEM) and dynamic light scattering (DLS). The mixed system of sodium dodecyl sulfate (SDS) with [mim-C4-mim]Br2 or [mpy-C4-mpy]Br2 was also constructed, and only micelles were observed. We infer that a pseudogemini surfactant is formed under the synergic effect of electrostatic, π–π stacking, and σ–π interactions in the SDBS/[mim-C4-mim]Br2/H2O system, while electrostatic attraction and hydrophobic interactions may provide the directional force for vesicle formation in the SDBS/[mpy-C4-mpy]Br2/H2O system.
研究领域:
化学
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材料科学
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胶体与界面科学
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DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2016
·
IF 2.76
Honghong Li,Qian Li,Jingcheng Hao,Zhenghe Xu,Dejun Sun
We prepared a CO 2 responsive emulsion by using switchable hydrophobic tertiary amine, N , N -dimethylcyclohexylamine (DMCHA). DMCHA exhibits little miscibility with water in the absence of CO 2 , but shows a complete miscibility with water in the presence of CO 2 . DMCHA converts to water-soluble bicarbonate salts upon treatment with CO 2 , which could induce the ionic strength increase of aqueous phase. Together with paraffin oil, DMCHA was used to prepare CO 2 responsive O/W emulsions with a conventional surfactant, sodium dodecyl benzene sulfonate (SDBS), as the emulsifier. Emulsions containing DMCHA in paraffin oil were more stable than those without DMCHA, as a result of electrostatic interactions between a small fraction of protonated DMCHA and SDBS, confirmed by surface tension and 1 H NMR measurements. However, when exposed to CO 2 most of the paraffin oil and water separate from the emulsion with formation of a middle phase microemulsion. More significantly, DMCHA could be separated from the lower water phase upon removal of CO 2 and recycled.
研究领域:
化学工程
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材料科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2021
·
IF 7.312
Wei Liu,Danyu Liu,Hao Yin,Chunyan Yang,Ke Lu
Foam fractionation is an adsorption bubble separation technique allowing recovery and immediate reuse of surfactants. This work was aimed at investigating the variations in recovery efficiency and physicochemical property of sodium dodecyl benzene sulfonate (SDBS) through multiple foam fractionation operation. First, a suitable SDBS concentration of 0.05 g/L was determined for preparing feeding solution. Subsequently, effects of volumetric air flow rate, height ratio of liquid phase and foam phase, and pore diameter of gas distributor on recovery efficiency of SDBS were investigated, respectively. Response surface methodology (RSM) was used to optimize the operating conditions of foam fractionation for separating SDBS. Under the conditions of volumetric air flow rate 80 mL/min, height ratio of liquid phase and foam phase 1:2, and pore diameter of gas distributor 0.180 mm, enrichment ratio and recovery percentage of SDBS were 134.83 ± 6.74 and 63.43 ± 3.17%, respectively. In repetitive separation experiments, the maximum separation number of recovered SDBS by foam fractionation was 3. Experimental results of surface activity and foam properties of recovered SDBS solution suggested that the interfacial adsorption and desorption processes had induced the structural transition and irreversible aggregation of SDBS molecules after multiple foam fractionation operation.
研究领域:
化学工程
·
环境科学
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DOI
高影响因子
JOURNAL OF SURFACTANTS AND DETERGENTS
·
2019
·Vol. 23
·期 1
·169-176
·
IF 1.672
Jian Zou,Yigang Liu,Qiuxia Wang,Hao Liu,Han Jia,Peng Lian
The dynamic noncovalent interaction between the anionic surfactant sodium dodecyl benzene sulfonate (SDBS) and 1,3-diphenylguanidine (DPG) was employed to control the interfacial activity of the surfactant. At high HCl concentration (1000 mg L −1 ), the SDBS/DPG n+ system could reduce the water/oil interfacial tension (IFT) to 10 −4 mN m −1 order of magnitude, which was much lower than the IFT values in the SDBS/DPG + system with a low HCl concentration (100 mg L −1 ) and the individual SDBS system by three and four orders of magnitude, respectively. The pH-switchable protonation of amido groups in DPG molecules determines the SDBS/DPG molecular interaction and the amplitude of IFT reduction, which was confirmed by control experiments using two other surfactants (sodium dodecyl sulfate [SDS] and dodecyl trimethylammonium bromide [DTAB]). Moreover, the investigation of the NaCl and temperature effects on the IFT indicated the intensity of mixed SDBS/DPG n+ adsorption layers at the water/oil interface.
研究领域:
化学
·
界面科学
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产品关联
DOI
高影响因子
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
·
2025
·
IF 5.4
Juan Zhang,Hongbo Wang,Hongsheng Zhang,Peng Zhang,Chen Li,Yulong Yang
The careful design and synthesis of CO 2 stimulus-responsive surfactants are critical to the effective application of CO 2 -switchable emulsion for reducing the viscosity of heavy crude oil. In this study, a simple alternative method was proposed to construct CO 2 -responsive emulsions using a series of N, N-dimethylalkyl tertiary amines with different chain lengths as CO 2 -responsive agents, in combination with sodium dodecylbenzene sulfonate (SDBS) as emulsifiers. The stability, responsiveness, reversibility, demulsification performance and mechanism of emulsions formed with dodecane and crude oil respectively, were evaluated by interfacial tension, electrical conductivity, particle size, Zeta potential and 1 H NMR measurements. The results show that the incorporation of the amines enhanced emulsion stability by 10～20 %, with the crude oil-in-water emulsion exhibiting approximately three times greater stability than its dodecane-in-water counterpart. Remarkably, the emulsification of the crude oil resulted in a nearly 96.77 % reduction in viscosity. Moreover, the crude oil emulsions underwent rapid demulsification within minutes upon CO 2 exposure. These distinctive properties underscore the strong potential of CO 2 -responsive surfactants for viscosity reduction in heavy oil applications.
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产品关联
DOI
高影响因子
CHEMICAL PHYSICS
·
2026
·
IF 2.8
Zilong Liu,Fengzhi Guo,Huan Wang,Tianfang Yang,Yanxiao Hei,Xin Wang,Xiaonan Hou,Zhenxuan Yue,Weichao Sun
The efficiency of chemical enhanced oil recovery (EOR) is significantly influenced by the adsorption behavior of surfactants on rock surfaces, a phenomenon not fully understood in terms of molecular structuring and interfacial dynamics. In this study, we present a multi-scale investigation that integrates static adsorption experiments, quartz crystal microbalance with dissipation (QCM-D), and molecular dynamics (MD) simulations to elucidate the adsorption characteristics of two representative nonionic and anionic surfactants, Triton X-100 and sodium dodecyl benzene sulfonate (SDBS). Their adsorption capacities followed the order: montmorillonite > calcium carbonate > silicon dioxide. The adsorption isotherm of surfactants on calcium carbonate and silicon dioxide followed the Langmuir model, while adsorption on montmorillonite aligned more with the Freundlich model. Kinetic studies indicated that the adsorption processes for both surfactants followed the pseudo-second-order model. Thermodynamic analysis revealed that the adsorption processes were both exothermic and spontaneous. Notably, QCM-D measurements further confirmed bilayer adsorption structures for both surfactants at the solid-liquid interface. Complementary MD simulations provided molecular-level insights into adsorption energy, conformational arrangement, spatial distribution, and hydrogen bonding networks, revealing distinct interaction mechanisms for the two surfactants. The obtained results offer a comprehensive understanding of surfactant-rock interactions, which are crucial for optimizing chemical flooding processes in EOR applications.
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DOI
高影响因子
POLYMERS FOR ADVANCED TECHNOLOGIES
·
2022
·Vol. 33
·期 12
·4290-4301
·
IF 3.348
Ping Lyu,Yongbo Hou,Rongzhen Wang,Mingliang Ma,Yan Chen,Qiyang Xing,Yong Ma,Shuang Wang,Yuefeng Wu,Weibo Huang
The flame retardant zinc ferrite@Mg-Al-sodium dodecyl benzene sulfonate layered double hydroxide (ZnFe 2 O 4 @Mg-Al-SDBS LDH) was prepared successfully by simple hydrothermal method and co-precipitation method. ZnFe 2 O 4 nanoparticle was used as the core on which Mg-Al LDH was encapsulated to form a spherical structure with a lamellar intercalation layer. The microstructure, the phase structure, and the thermal properties of flame retardant were characterized in detail. Compared with pure polyurea (PUA), the total heat release (THR), peak heat release rate (PHRR) and smoke factor (SF) of PUA/ZnFe 2 O 4 @Mg-Al-SDBS LDH 3.0 wt% decreased by 17.64%, 20.13%, and 28.42%, respectively. In the combustion process, Mg-Al LDH could generate porous metal oxides (Al 2 O 3 and MgO), and ZnFe 2 O 4 could also be decomposed into ZnO and Fe 2 O 3 . These oxides catalyzed cross-linking of polymer molecules, to promote the formation of a dense char layer, and isolated heat and combustible gases from the underlying material. The improved flame retardant properties of the modified intercalated microspheres could be attributed to catalytic carbonization and physical barrier. Moreover, the mechanical properties of PUA composites were tested by universal tensile testing machine. The results showed that the addition of ZF@MASL flame retardant had little influence on the mechanical properties of PUA composites.
研究领域:
材料科学
·
燃烧学
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
PROCESS SAFETY AND ENVIRONMENTAL PROTECTION
·
2024
·
IF 6.9
Yun Xue,Xingan Feng,Jiadong Wang,Jianzhang Gao,Lijun Zhang,Qi Chen,Fuqiu Ma,Yongde Yan
The immobilization of uranium in nuclear wastewater is of paramount importance for environmental and human health. However, there is a paucity of research on the immobilization of uranium in alkaline wastewater, particularly with regards to the application of novel electrodes. This article presents the utilization of an electrochemically polymerized polypyrrole stainless steel (PPy-SUS304) electrode for the effective electrochemical deposition and removal of uranium from alkaline wastewater containing uranium. According to the electrodeposition results, the uranium deposition efficiency of the novel electrode reached 96.82 %, with a uranium deposition rate of 0.048 mg U/(h·cm 2 ) and a charge efficiency of 0.055 mg U/C. These findings demonstrate the successful electrochemical reduction of UO 2 (CO 3 ) 3 4- in alkaline uranium-containing wastewater using the novel electrode, resulting in improved charge deposition efficiency. The electrode surface products were investigated using scanning electron microscopy (SEM), Energy-dispersive X-ray spectroscopy (EDS), and X-Ray Photoelectron Spectroscopy (XPS). The SEM and EDS results demonstrate the formation of a uniform PPy film on the surface of SUS304. In addition, the White light interferometer (WLI) test reveals that the PPy-SUS304 electrode exhibits increased roughness compared to the SUS304 electrode. The XPS results revealed that the electrode surface products of PPy-SUS304 were actually U compounds constituted of U(IV) oxides or hydroxides. This study provides a new perspective for the development of novel electrodes to suppress side reactions and efficiently recover uranium from alkaline uranium-containing wastewater.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
JOURNAL OF PHYSICAL CHEMISTRY B
·
2022
·
IF 3.466
Shu-Qian Hu,Shi-Yong Ran
Lead ions can bind to DNA via nonelectrostatic interactions and hence alter its structure, which may be related to their adverse effects. The dynamics of Pb2+–DNA interaction has not been well understood. In this study, we report the monomolecular dynamics of the Pb2+–DNA interaction using a magnetic tweezers (MT) setup. We found that lead cations could induce DNA compaction at ionic strengths above 1 μM, which was also confirmed by morphology characterization. The chelation behavior of the Pb2+–DNA and the Cd2+–DNA complex solutions after adding EDTA were compared. The results showed that EDTA chelated with the bound metal ions on DNA and consequently led to restoring the DNA to its original length but with different restoration speeds for the two solutions. The fast binding dynamics and the slower chelation dynamics of the Pb2+ scenario compared to that of Cd2+ suggested that Pb2+ was more capable to induce DNA conformational change and that the Pb2+–DNA complex was more stable than the Cd2+–DNA complex. The stronger affinities for DNA bases and the inner binding of lead cations were two possible causes of the dynamics differences. Three agents, including EDTA, sodium gluconate, and SDBS, were used to remove the bound lead ions on DNA. It was shown that EDTA was the most efficient, and sodium gluconate could not fully restore DNA from its compact state. We concluded that both EDTA and SDBS were good candidates to restore the Pb2+-bound DNA to its original state.
研究领域:
生物化学
·
分子生物学
·
生物物理学
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产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）