ACS Applied Materials & Interfaces
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2021
·
IF 9.229
Wanshun Deng,Gang Wang,Lei Tang,Zhixiang Zeng,Tianhui Ren,Qunji Xue
Viscous oil adherence onto solid surfaces is ubiquitous and has caused intractable fouling problems, impairing the function of solid surfaces in various areas such as optics and separation membranes. Materials with superhydrophilicity and underwater superoleophobicity are very effective in elimination of oil fouling. However, most of them cannot dewet viscous oils and may malfunction without prehydration treatment. Herein, we report a facile and environmental strategy to prepare barium sulfate (BaSO4) nanocoating to dewet viscous oils on dry surfaces. Abundant surface polar groups (surface hydroxyl) on BaSO4 nanocoating enhance both hydrophilicity after oil fouling (underoil water contact angle <10°) and underwater superoleophobicity (underwater–oil contact angle >155°) and then facilitate oil dewetting ability. Different oils with viscosity up to 900 mPa·s can be easily eliminated after immersion into water. The results and force analysis also demonstrate that small surface roughness and ultrahydrophilicity under oil are beneficial to achieve oil dewetting property on dry surfaces. Furthermore, BaSO4 nanocoating displays excellent mechanical, thermal and chemical stability and can maintain oil repellency through various harsh conditions. Outstanding antioil fouling ability also enables the fabric coated by BaSO4 nanocoating to separate crude oil/water with flux higher than 28 000 Lm2–h–1 and separation efficiency larger than 99.9% and maintain effective separation performance even after 100 times of separation. Thus, the robust superhydrophilic BaSO4 nanocoating is potential in oil dewetting and waste oil remediation.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF ENVIRONMENTAL MANAGEMENT
·
2025
·
IF 8.4
Yin Wang,Jiao Zhao,Xianmeng Liu,Xiaojia Tang,Tie Li,Yimin Zhu
Oily sludge not only seriously pollutes the ecological environment, but also endangers human health. Additionally, the complex properties pose significant challenges in its treatment. The single technology has limited capacity and poor treatment effect. Consequently, the combined technology is being developed due to the exceptional treatment effect. Herein, a new combined technology was proposed to treat oily sludge, which combined high-speed stirring cleaning with thermal-activated Na 2 S 2 O 8 oxidation. The bulk of petroleum pollutants were efficiently removed by high-speed stirring cleaning firstly, and the residual petroleum pollutants were decomposed by thermal-activated Na 2 S 2 O 8 . After treatment, the oil content of the oily sludge decreased from 13.81 % to 0.47 % with the removal rate of 96.6 % under the optimal conditions, which had reached the discharge and reuse standards. The high-speed stirring had remarkable removal effect on saturated hydrocarbons, aromatic hydrocarbons and resins. In addition to the three components mentioned above, thermal-activated Na 2 S 2 O 8 also had excellent removal effect on asphaltenes in the cleaned oily sludge based on the strong oxidation effect of SO 4 − · and OH·. This work demonstrates a new method to treat oily sludge efficiently, which not only reduces the burden of petrochemical industries and provides support for their green development, but also has important scientific significance for environmental protection and environmental management.
研究领域:
环境科学
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化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
International Journal of Environmental Research and Public Health
·
2023
·Vol. 20
·期 4
·2841
·
IF 4.614
Qinghong Li,Huan Yang,Ping Chen,Wenxue Jiang,Fei Chen,Xiaorong Yu,Gaoshen Su
The co-pyrolysis of oily sludge and walnut shell is a reliable method for solid waste treatment and waste recycling. In this paper, a thermogravimetric analysis was used to study the thermodynamics and synergy effect of oily sludge (OS) and walnut shell (WS) at four heating rates (10, 20, 30, and 40 °C/min) in the temperature range from 50–850 °C. Two model-free methods (FWO and KAS) were used to calculate the activation energy. The results showed that the heating rate had no significant effect on the pyrolysis process. The addition of walnut shell improved the pyrolysis process of the samples. Mixture 1OS3WS had a synergy effect, while other blends showed an inhibitory effect. The synergy effect of co-pyrolysis was strongest when the mass ratio of oily sludge was 25%. The activation energy of the Zn-ZSM-5/25 catalyst was the lowest, and the residual substances were the least, indicating that the Zn-ZSM-5/25 was beneficial to the co-pyrolysis of oily sludge and walnut shell. The analysis of catalytic pyrolysis products by Py-GC/MS found that co-pyrolysis was beneficial to the generation of aromatic hydrocarbons. This study provided a method for the resource utilization of hazardous waste and biomass waste, which was conducive to the production of aromatic chemicals with added value while reducing environmental pollution.Keywords:oily sludge;co-pyrolysis;biomass;ZSM-5
研究领域:
环境科学
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能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES
·
2022
·Vol. 23
·期 14
·7504
·
IF 6.208
Mingzhu Yao,Yun Ma,Lu Liu,Chengrong Qin,Haibo Huang,Zhiwei Zhang,Chen Liang,Shuangquan Yao
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.Keywords:oily sludge;sodium lignosulfonate;adsorption demulsification;separation;recovery
研究领域:
环境科学
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能源工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
NANOTECHNOLOGY
·
2024
·Vol. 35
·期 30
·305703
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IF 2.9
Lang Liu,Wei Wang,Ye Hong
Membrane distillation technology could utilize low-grade heat to desalinate brine, but the membrane material often suffers from disadvantages of low permeation flux and weak robustness to contaminants. To address these issues, the commercial polytetrafluoroethylene (PTFE) membrane was modified by cost-effective chemicals of tannic acid and (3-Aminopropyl)-triethoxysilane (APTES) to construct hydrophilic/underwater superoleophobic nano-rough structures on the surface to enhance its flux and oil-fouling resistance in direct contact membrane distillation. The results show that a high underwater oil contact angle of 180° is observed to the membrane surface due to the rough nanostructures functionalized by abundant hydroxyl groups. Despite the additional mass transfer resistance provided by the rough nanostructures, the flux was increased noticeably. This is mainly attributed to the strong interactions between the abundant hydroxyl groups of hydrophilic layer surface and water molecules, leading to a part of free water staying at intermediate transition state (IW). The mass transfer resistance of the hydrophilic layer itself is reduced as a consequence of decreased evaporation enthalpy of water, thereby increasing the flux. Moreover, while the flux of the pristine membrane is reduced by 84.18%, the flux of Janus membrane remains the same when treating mineral oil brine emulsions with oil concentration up to 1500 ppm in comparison with the result for 35 g l−1 brine solution, indicating that the Janus membrane is safe from the oil contamination. Our work provides a fine guidance for membrane distillation to treat high oily brine.
研究领域:
环境科学
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材料科学
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产品关联
DOI
PubMed
高影响因子
KOREAN JOURNAL OF CHEMICAL ENGINEERING
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2018
·Vol. 35
·期 5
·1119-1127
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IF 2.199
Li Yuan,Liu Xiaodong,Cai Weijie,Cao Yafeng,Sun Yanfeng,Tan Fengzhi
This work mainly focused on the preparation of a low-cost, ultralight absorbent from renewable corn straw and filter paper via a facile and environmental-friendly approach containing high-shear blending and freeze-drying operation. The physicochemical properties of aerogel were thoroughly examined by several characterization techniques. The satisfactory hydrophobicity of the spongy aerogel was attributed to the formation of polysiloxane on the surface of methyltrimethoxysilane (MTMS) by the silanization reaction. Owing to its superior features, such as ultralow density, high porosity, desirable hydrophobicity, the corn straw based spongy aerogel exhibited a remarkable absorption capacity for both crude oil (36 g/g) and common organic solvents including carbon tetrachloride (CCl 4 , 45 g/g), dimethyl sulphoxide (DMSO, 24 g/g), N, N-dumethylformamide (DMF, 45 g/g). This might shed light on the design of efficient adsorbent for oil spills and organic pollutants to meet with the sustainable development.
研究领域:
材料科学
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环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
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2016
·Vol. 4
·期 20
·7869-7874
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IF 8.262
Peng Wang,Mingji Chen,Huilong Han,Xiaoliang Fan,Qing Liu,Jinfeng Wang
This paper reports an easy method to prepare a transparent superhydrophobic coating which shows a robust resistance to oil contamination, knife-scratch, sandpaper abrasion and strong acid/base attack. A PDMS interlayer was introduced to support the partially embedded fluoroalkylsilane treated silica nanoparticles, and thus the coating retained superhydrophobicity and self-cleaning properties after knife-scratch or 9 sandpaper abrasion cycles. An OSP scraping ink bar was introduced to control the thickness of the silica nanoparticle suspension, and thus the coating shows good transparency for visible light. Moreover, this transparent superhydrophobic coating shows self-cleaning properties in either air or oil environment.
研究领域:
材料科学
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表面工程
✓ 已验证
产品关联
DOI
高影响因子
CARBOHYDRATE POLYMERS
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2015
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IF 4.074
Wenbo Chai,Xiaoyan Liu,Junchen Zou,Xinying Zhang,Beibei Li,Tiantian Yin
Pomelo peel (PP), as one of the well-known agricultural wastes, is cost-effective and environmentally friendly. Based on PP, two new kinds of oil sorbents were prepared by using acetic anhydride and styrene. The structures of raw pomelo peel (RP), acetic anhydride-treated pomelo peel (AP) and styrene-treated pomelo peel (SP) were characterized by Fourier transform infrared (FTIR) spectroscopy and scanning electron microscopy (SEM), contact-angle (CA) measurements. The optimum reaction conditions for preparation of AP and SP were also investigated. The resulting products exhibited better oil sorption capacity than that of RP for diesel and lubricating oil, also SP had better oil sorption capacity than AP, while the oil sorption capacities of SP for diesel and lubricating oil reached 18.91 and 26.36 g/g, respectively. Adsorption kinetics was well described by the pseudo-second-order model. The results indicated that AP and SP, especially SP could be used as the substitute for non-biodegradable oil sorption materials.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2022
·
IF 9.136
Yunyun Wang,Li Chen,Yinhua Jiang,Xinyan Yang,Jiangdong Dai,Xiaohui Dai,Mingdong Dong,Yongsheng Yan
Applying polyvinylidene fluoride (PVDF) monolith for phosphates removal can improve the operability of the adsorption process compared with some other powder nanomaterials. However, as the commonly used synthesis strategy, non-solvent induced phase separation (NIPS) was deemed not environmentally friendly enough since the dissolution of PVDF often involved volatile organic compounds (VOCs). This article designed a salt sacrificial template method to fabricate a 3D porous PVDF monolith, and then in-situ growth of lamellar La(OH) 3 on the PVDF foam was realized to enhance the adsorption affinity to phosphates pollution. No VOCs were used or released during the whole synthesis process. The adsorption for phosphates was as high as 56.2 mg g −1 , and easy reusability of the novel PVDF monolith was realized. In addition, this PVDF-La(OH) 3 foam exhibited good adsorption properties in both oil and water environments, which implied it could not only adsorb phosphates in actual water samples but also separate oil contaminants from water. All these implied that this PVDF-La(OH) 3 foam could be a potential candidate for large-scale industrial adsorption and separation of phosphates. This PVDF-La(OH) 3 foam could be a potential candidate for large-scale industrial adsorption and separation of phosphates.
研究领域:
环境科学
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材料科学
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产品关联
DOI
高影响因子
DESALINATION
·
2021
·
IF 9.501
Minyuan Han,Yuting Wang,Jingmei Yao,Caihong Liu,Jia Wei Chew,Yi Wang,Yingchao Dong,Le Han
This study mainly focused on enhancing oil-membrane electrostatic repulsion towards anti-oil-fouling via electrically conductive hydrophobic membrane in electricity-assisted membrane distillation (MD). Carbon nanotubes (CNTs) were coated on commercial membranes to fabricate membrane cathode. For concentrated hexadecane-in-saline water emulsions, the modified membrane exhibited significantly less flux decline, < 5% in dealing with extreme high-concentration oil emulsion (2000 ppm) at cell potential of 3.0 V. The anti-oil-fouling robustness was further confirmed over a continuous three-cycle operation with in-situ DI rinse. The anti-fouling mechanism was systematically discussed regarding the hydrophilicity of the membrane interface , charge repulsion between the oil and membrane cathode as well as slippery property at the liquid-gas-solid triple-phase interface. A modeled fouling rate constant was negatively associated with the calculated capacitive surface charge of the membrane cathode. Thermodynamics analysis suggested enhanced foulant-membrane electrostatic repulsion leads to a significant energy barrier which favored anti-fouling performance. Interestingly, the sliding dynamics of oil droplet along the interface of membrane cathode was found, tuned by the herein weak cell potential, which could also contribute to the fouling mitigation. Our results insight that the electrically conductive membrane cathode could modulate the foulant-membrane interaction which plays an important role in mitigating fouling/wetting occurred at the triple-phase interface.
研究领域:
环境工程
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材料科学
✓ 已验证
DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
·
2025
·
IF 9
Jinmei He,Mengge Cao,Yuhang Gao,Menglin Zhu,Jin Zhang,Xiao Wei,Yurou Dong,Cai-Li Sun,Mengnan Qu
Microplastic (MPs) and oil spills have emerged as critical global environmental challenges due to their persistence, bioaccumulation, and difficulty with their removal from aquatic ecosystems. These pollutants not only deteriorate aquatic environments but also pose significant risks to human health via the food chain. Consequently, developing efficient removal technologies is essential for environmental protection and ecosystem recovery. To this end, a superhydrophobic sponge material (PPNP) based on melamine foam (MF) was prepared using a simple dipping method. The sponge was coated with polydopamine (PDA), Ni-MOF, polypyrrole (PPy), and polydimethylsiloxane (PDMS) in layers, endowing it with photothermal conversion capability, superhydrophobicity (WCA = 154.5°) and the ability to adsorb MPs. Tests showed that PPNP exhibited excellent photothermal conversion performance under different light conditions, with surface temperatures reaching up to 135.1℃, thus enhancing crude oil recovery efficiency through photothermal-assisted methods. Additionally, PPNP demonstrated outstanding performance in removing MPs from water, with a removal efficiency as high as 98.4 %. Furthermore, density functional theory (DFT) calculations were employed to analyze the various forces involved in the adsorption of MPs by the composite sponge, considering the material’s properties. The prepared composite sponge provides an efficient and environmentally friendly solution for the removal of environmental pollutants, demonstrating broad application potential.
研究领域:
环境科学
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材料科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2020
·Vol. 138
·期 11
·50043
·
IF 2.52
Haitao Meng,Tong Xu,Mingyuan Gao,Jie Bai,Chunping Li
Oil–water separation is an urgent issue due to the frequently occurred oil leakages and increasing discharge of oily wastewater. The pollutional and wastewater can not only damage the environment, but endanger human health. Owing to the small particle size of the oil contamination, it is still a challenge for the separation of oil–water emulsion. In this study, we developed a facile strategy to prepare a hydrophilic polyvinylpyrrolidone/polyacrylonitrile (PVP/PAN) nanofibrous membrane for oil–water mixture and emulsion separation. The lowest water contact angle on the membrane surface can achieve 16.7°, thus the membranes can effectively resist the oil contamination on them. Moreover, the membrane can efficiently separate oil–water mixtures and emulsion by gravity. In addition, it can separate oil–water mixtures in harsh conditions (pH = 1 and 14). Membranes prepared in this work would hold a great potential in the practical use of water treatment and environmental industry.
研究领域:
环境科学
·
材料科学
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）