CHEMICAL ENGINEERING JOURNAL
·
2024
·
IF 13.3
Sheng-Jie Chen,Ming-Jun Zhu,Si-Ying Cui
High salinity waste, such as food waste, is difficult for microbial utilization as high salt increases cellular osmosis. In this study, a novel cellulolytic halotolerant (<150 g/L salinity) strain Clostridium thermopalmarium HCD (halotolerant and cellulose-degrading strain) was screened from paper sludge, which obtained 108.47 and 42.53 mM hydrogen from cellobiose under 30 and 80 g/L NaCl respectively. HCD could improve 25.14 % hydrogen production of MT (a mixed thermophilic Clostridiales ) consortium from co-substrates of pretreated sugarcane bagasse and food waste as bio-enhancer. Microbial community analysis showed that the inoculation of HCD profoundly changed the original community structure and dominant species of MT with the prolongation of fermentation time, leading to increase utilization of co-substrates and higher hydrogen production. In response to high salinity, HCD regulated the cell shape from a slender rod to a stubby one, balancing the high osmotic pressure. Furthermore, HCD could secrete and transport betaine as the main response to high salinity. Betaine could mediate the Na/K pump-like transport system, especially Na + /H + antiporter to balance the intracellular osmotic pressure. Betaine could also relieve cell membrane damage, improving the transportation of extracellular P ions to the intracellular. Moreover, betaine could increase the levels of extracellular polymers and intracellular ATP. This study provided a halotolerant hydrogen-producing strain and its halotolerant mechanism, which paid a solid foundation for the utilization of high-salt waste biomass.
研究领域:
微生物学
·
环境科学
·
生物能源
✓ 已验证
产品关联
DOI
高影响因子
PHYSICAL CHEMISTRY CHEMICAL PHYSICS
·
2016
·Vol. 18
·期 36
·25394-25400
·
IF 4.449
Yuqi Li,Hui Zhang,Mizi Fan,Jiandong Zhuang,Lihui Chen
Oil–water separation has recently become an important subject due to the increasing incidence of oil spills. Materials with underwater superoleophobic properties have aroused considerable interest due to their cost-effectiveness, environmental friendliness and anti-fouling properties. This paper presents a robust salt-tolerant superoleophobic aerogel inspired by seaweed used without any further chemical modification for oil–seawater separation. The green aerogel is prepared by freeze-drying of sodium alginate (SA)–nanofibrillated cellulose (NFC) using Ca2+ ions as the crosslinking agent. The three-dimensional (3D) interconnected network structure of the developed aerogel ensures its high mechanical strength and good flexibility. The natural hydrophilicity of the polysaccharides contained in the aerogel ensures its excellent underwater superoleophobicity, antifouling and salt-tolerance properties. More impressively, the as-prepared aerogel can even keep its underwater superoleophobicity and high hydrophilicity after being immersed in seawater for 30 days, indicating its good stability in marine environments. Furthermore, the aerogel could separate oil–seawater mixtures with a high separation efficiency (of up to 99.65%) and good reusability (at least 40 cycles). The facile and green fabrication process combined with the excellent separation performance and good reusability makes it possible to develop engineering materials for oil–water separation in marine environments.
研究领域:
材料科学
·
环境科学
·
海洋科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF APPLIED POLYMER SCIENCE
·
2022
·Vol. 140
·期 3
·e53338
·
IF 3.057
Shenglong Shi,Jinsheng Sun,Kaihe Lv,Qingzhi Wen,Yingrui Bai,Jintang Wang,Jiafeng Jin,Jingping Liu,Xianbin Huang,Jian Li
To prepare the thickener of fracturing fluid with temperature resistance, salt resistance and quick dissolution, an emulsion thickener (ASC) was synthesized by acrylamide, acrylic acid, 2-acrylamide-2-methylpropanesulfonic acid, and acryloyl morpholine. The dissolution, salt resistance and drag reduction of ASC, and the viscoelasticity, temperature resistance and shear resistance and gel breaking properties of fracturing fluid formed by ASC and zirconium crosslinker were investigated. The results showed that the sticky time of ASC was less than 60 s and the drag reduction rate was 72.5% in 100,000 mg/L brine, showing that ASC had thickening ability in high salinity brine and satisfied the requirements of continuous fluid preparation on the fracturing process. The viscosity of ASC fracturing fluid was 98 mPa s after shearing at 200°C and 170 s −1 for 150 min when the salinity was 100,000 mg/L. When the ammonium persulfate concentration was 400 mg/L, the viscosity of the broken fluid was 4.0 mPa s. The temperature resistance, salt resistance and shear resistance of ASC emulsion fracturing fluid could be significantly improved by the introduction of acryloyl morpholine, ASC fracturing fluid had the characteristics of high elasticity and low viscosity, which could meet the application requirements under ultra-high temperature reservoirs.
研究领域:
石油工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
DESALINATION
·
2025
·
IF 9.8
Min Yin,Shun Lu,Guoshun Gao,Huan Zeng,Wenyu Zheng,Jing Xu,Chaohu Xiao,Lihua Chen
The development of solar-driven interface evaporation (SDIE) technology is considered as one of the highly promising approaches for purifying seawater and wastewater treatment. However, simultaneously achieving superb evaporation rates, excellent salt resistance and protection against biofouling, and being able to operate in various water resources is still remains a significant challenge. In this work, a composite PVDF Janus membrane with schottky junction (PC-SP-MCN) was fabricated by using polyvinylidene fluoride (PVDF) as the basement membrane, the poly(ionic liquid)s grafted SiO 2 (SiO 2 -PILs) as the hydrophilic agent, calcium carbonate (CaCO 3 ) and hydrochloric acid (HCl) as pore-forming agents, and MXene/g-C 3 N 4 was employed as the photocatalyst. Under the solar irradiance of 1 kW m −2 , the PC-SP-MCN can achieve an evaporation rate of 1.51 kg m −2 h −1 , resulting in an impressive evaporation efficiency of 91 %. When tested in the NaCl solution with a concentration of 20 wt%, the evaporation rate and efficiency of PC-SP-MCN was calculated to be 1.39 kg m −2 h −1 and 83 %, respectively. Furthermore, the PC-SP-MCN also exhibited satisfied abilities in photocatalytic degradation and antibacterial properties. It can degrade methyl orange (MO), rhodamine B (RhB), and methylene blue (MB) in simulated dye wastewater effectively, while also display significant inhibitory effects on Escherichia coli and Staphylococcus aureus . The PC-SP-MCN that has been prepared exhibits ample porosity, efficient pathways for water molecule transport, outstanding ability to absorb sunlight, and minimal conductivity of heat. And it also exhibited an efficient SDIE performance, superb photodegradation, and antimicrobial properties. This study gives a new perspective to integrate different properties into the SDIE system and expand its application, especially in desalination and wastewater treatment.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
COLLOID AND POLYMER SCIENCE
·
2016
·Vol. 295
·期 1
·53-66
·
IF 1.89
Ma Xiping,Zhu Zhongxiang,Shi Wei,Hu Yingying
The zwitterionic copolymers are widely used for fluid loss additive in water-based drilling fluid due to their good performance in reducing the filtration loss and inhibiting the swelling of shales. However, there are still shortcomings to the conventional zwitterionic copolymer such as the poor properties of salt tolerance and thermal stability. This study synthesized a new kind of copolymer consisting of acrylamide (AM), 2-acryloylamino-2-methyl-1-propanesulfonic acid (AMPS), diallyl dimethyl ammonium chloride (DMDAAC), and the synthesized betaine-type monomer (vinylphenyl sulfonate (VPS)) (copolymer (PVAAD)) through introducing AMPS, DMDAAC, and VPS onto the backbone of AM via the method of free radical polymerization in aqueous solution. The biggest difference of PVAAD with the conventional zwitterionic copolymer is that there are zwitterions in the same chain and the different chain in the molecular structure of PVAAD. Results of performance evaluation show that the synthesized PVAAD used as fluid loss additive has good performances. It could be used as a fluid loss additive for water-based drilling fluid in salty and high-temperature environment. After adding 1.25 wt% of PVAAD, the structure of the filter cake of the copolymer drilling fluid system becomes relatively uniform and dense, and the particle size distribution of the freshwater drilling fluid tends to become more rational. Compared with the other commercial fluid loss additives, the synthesized PVAAD has a better property of high-temperature resistance and performance in controlling the American Petroleum Institute (API) filtration loss of drilling fluid systems.
研究领域:
石油工程
·
高分子化学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2019
·Vol. 54
·期 24
·14752-14762
·
IF 3.442
Lyu Yahui,Gu Chenglin,Tao Jiaping,Yao Xue,Zhao Guang,Dai Caili
The temperature resistance, shear stability and salinity tolerance of the polymer are crucial as a chemical agent for enhanced oil recovery (EOR) involving high-temperature and high-salinity reservoirs. In this work, triethoxyvinylsilane (VTEO) molecules were first covalently bound to the surface of the graphene oxide (GO) to synthesize the sGO, and then, the sGO was copolymerized with acrylamide (AM) to prepare the PAM/sGO composite. The composite was also characterized by Fourier transform infrared spectroscopy, X-ray diffraction analysis, X-ray photoelectron spectroscopy and thermogravimetric analysis. Additionally, temperature resistance, shear stability and salinity tolerance were evaluated to determine the performance of the composite. These results indicate that the synthesized composite exhibits novel thermal-resistant, shear-stable and salinity-tolerant performance as a new EOR agent in high-temperature and high-salinity reservoirs. Furthermore, the stability mechanisms of the composite were revealed through the analysis of the interactions between GO sheets and polymer matrix in the microstructure.
研究领域:
材料科学
·
石油工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED AND ENVIRONMENTAL MICROBIOLOGY
·
2015
·Vol. 81
·期 11
·
IF 3.668
Huajun Feng,Xueqin Zhang,Kun Guo,Eleni Vaiopoulou,Dongsheng Shen,Yuyang Long,Jun Yin,Meizhen Wang
Fed batch bioelectrochemical systems (BESs) based on electrical stimulation were used to treat p-fluoronitrobenzene (p-FNB) wastewater at high salinities. At a NaCl concentration of 40 g/liter, p-FNB was removed 100% in 96 h in the BES, whereas in the biotic control (BC) (absence of current), p-FNB removal was only 10%. By increasing NaCl concentrations from 0 g/liter to 40 g/liter, defluorination efficiency decreased around 40% in the BES, and in the BC it was completely ceased. p-FNB was mineralized by 30% in the BES and hardly in the BC. Microorganisms were able to store 3.8 and 0.7 times more K+ and Na+ intracellularly in the BES than in the BC. Following the same trend, the ratio of protein to soluble polysaccharide increased from 3.1 to 7.8 as the NaCl increased from 0 to 40 g/liter. Both trends raise speculation that an electrical stimulation drives microbial preference toward K+ and protein accumulation to tolerate salinity. These findings are in accordance with an enrichment of halophilic organisms in the BES. Halobacterium dominated in the BES by 56.8% at a NaCl concentration of 40 g/liter, while its abundance was found as low as 17.5% in the BC. These findings propose a new method of electrical stimulation to improve microbial salinity resistance.
研究领域:
环境科学
·
微生物学
·
生物技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
COLLOID AND POLYMER SCIENCE
·
2025
·
IF 2.3
Zhang Wenlong,Zhang Qi,Xia Tianbao,Ji Qiuhan,Liu Jiefan,Liu Xingwen,Wang Lan,Wang Longyao
A viscoelastic surfactant ( VES ) clean fracturing fluid is an excellent alternative to polymer-based fracturing fluids for fracturing low-permeability reservoirs. However, the existing VES either has poor salt resistance or involve complicated preparation steps. Herein, a cationic Gemini VES with high salt tolerance, named neopentanediol di-(erucamide propyl ammonium bromide) ( NEPB ), was synthesized through a one-step reaction to simplify the process, using erucamide propyl dimethylamine and pentaerythritol dibromide dissolved in DMF . The double hydroxyl groups on the spacer imparts NEPB superior salt tolerance to the Gemini VES with a single hydroxyl ( JS-(OH)-JS ). Salinity-sensitive evaluation experiments consisting of salinity cloud point, DLS , and fluorescent probe tests; rheological experiments including apparent viscosity, viscoelasticity, and heat and shear resistance measurement; and comprehensive tests of fracturing fluids such as proppant suspending, gel-breaking, and core damage rate were carried out to study the performance of NEPB used in a fracturing fluid. The apparent viscosity of 3 wt% NEPB solution rises to the peak value at the NaCl concentration of 5 wt%, much higher than that of the JS-(OH)-JS solution. Oscillatory measurements exhibit that the NEPB solution with the peak apparent viscosity exhibits superior viscoelasticity to the JS-(OH)-JS solution, and the relaxation time and the plateau of the storage moduli are 17.69 s and 53.71 Pa. And the NEPB VES fracturing fluids prepared by the simulated seawater of the South China Sea, with NaSal added, exhibits best heat and shear resistance, and the remain viscosity is above 40 mPa·s. Settling velocity proppant in the NEPB VES fracturing fluid with NaSal added is 1.22 mm/s. Ethylene glycol butyl ether exhibits a superior gel-breaking performance to crude oil, and the insoluble residues of the ethylene glycol butyl ether gel-breaking fluids are all below 3 mg/L. The development of NEPB not only simplifies the preparation course of VES but also improve the salt tolerance of cationic Gemini VES , which is meaningful to the development of low-permeability oil and gas reservoirs offshore. Graphical
研究领域:
石油工程
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Yuan He,Xin Yi Zhao,Ping Rao,He Ming Song,Yang Yang,Shan Wen Sun,Jin Xiong Zhou,Yong Mei Chen,Li Tan,Jian Zhong Ma
Fiber-reinforced hydrogel (FrH) possesses the capability as flexible structural materials. The state-of-the-art FrH left a number of key issues untouched, including interfacial effects and the tolerance against salt disturbance. Herein, we report a saline-tolerant and strong-yet-tough FrH. This is achieved by infiltrating gel-nacre matrix into a polyaramid fabric via a multiscale reinforcement at the interface. The incorporation of strong yet geometrically compliant fabric skeleton into saline-induced shrinking gel-nacre matrix with mechanical superiority resolves the swelling mismatch between swollen hydrogel and rigid fiber, relieving the trade-off property between strength and toughness. Such integration leads to a tight interfacial binding between both components, where fabricated FrH can sustain its structure up to 5 months in artificial sea water yet exhibit superior tough-yet-strong mechanical performances, i.e., ultimate fracture strength of 111.6 MPa, toughness of 383.3 MJ/m 3 , and fracture energy of 195.8 kJ/m 2 . The prototype of a bilayer petalage-like actuator that reversibly transfers from 2D to 3D structure in water and saline driving by osmotic pressure gradient was demonstrated. These inspiring results open the door for developing flexible, tough yet stable materials for applications in salty environments including soft robots, energy absorption structural materials, etc.
研究领域:
材料科学
·
生物医学工程
·
力学
✓ 已验证
产品关联
DOI
高影响因子
Materials Today Sustainability
·
2024
·
IF 7.1
Yan Liu,Yongfeng Zhu,Fangzhi Duan,Bin Mu,Xicun Wang,Aiqin Wang
It is crucial to design the novel low-cost and salt-tolerant superabsorbent for safeguarding food security and achieving sustainable agriculture. Herein, the porous superabsorbent composites with excellent salt tolerance were fabricated by redox-initiated grafting polymerization using water-based Pickering foam template co-stabilized with solid waste of coal gasification slag and plant particles Sapindus mukorossi pericarp . The stabilization mechanism of Pickering foams, swelling performance and salt-resistance of porous superabsorbent composites were studied in detail. Due to the abundant porous structure and the presence of coal gasification slag, the obtained superabsorbent composites exhibited rapid swelling rate and excellent water absorption capability, and the maximum water absorption in distilled water and 0.9 wt% NaCl solution reached 910 g/g and 126 g/g after 30 min, respectively. As 1.5 wt% the optimal superabsorbent composites was added into the saline-alkali soil, the growth of cabbages was significantly improved, and the plant height and chlorophyll content increased by 45.0% and 12.5%, respectively. This work served as a significant reference for preparing novel environmentally friendly water-saving materials for arid saline-alkali soil improvement.
研究领域:
农业科学
·
环境科学
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
POLYMER
·
2025
·
IF 4.5
Jiarui Wang,Jijun Wei,Fan Zhang,Xiaona Huang,Xiaotong Dong,Hang Jiang,He Zhang,Yungang Bai,Kun Xu,Pixin Wang
The excellent salt tolerance of ionic electrostatic and chemical double cross-linking hydrogels (D-IEC gel) was demonstrated using cationic hyperbranched poly(amido amine) as both electrostatic and chemical cross-linking junctions in an electrolyte solution. The D-IEC gel can be synthesized in NaCl concentrations ranging from 0 to 4.5 mol/L, while the single ionic electrostatic cross-linking hydrogel containing linear cationic monomers (SL-IEC gel) cannot form when the salt concentration exceeds 0.6 mol/L. Notably, the elastic modulus (G’) of the D-IEC gel, formed in a 4.5 mol/L NaCl solution, decreased slightly from 28.00 kPa (in distilled water) to 24.01 kPa––yielding a G’ retention rate of 85.75%, which is nearly 27 times higher than that of conventional IEC gels. Additionally, the D-IEC gel exhibited a self-healing efficiency of up to 90%. From practical applications, the G’ values of the D-IEC gel synthesized in a 3.5 wt% NaCl aqueous solution (similar to seawater) and in distilled water were measured, revealing a retention rate of 87.61%, significantly outperforming conventional IEC gel (3.18%). These findings indicate that the D-IEC gel, with its salt tolerance and self-healing capabilities, is a promising candidate for industrial materials, even in highly concentrated electrolyte solutions. Their exceptional performance is attributed to the structural stability of the hyperbranched polymer in an electrolyte solution and the dynamic irreversibility of ionic electrostatic cross-linking owing to the high charge density of the hyperbranched units.
研究领域:
材料科学
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
Scientific Reports
·
2017
·Vol. 7
·期 1
·1-7
·
IF 4.259
Li Yuqi,Zhang Hui,Fan Mizi,Zheng Peitao,Zhuang Jiandong,Chen Lihui
Marine pollution caused by frequent oil spill accidents has brought about tremendous damages to marine ecological environment. Therefore, the facile large-scale preparation of three-dimensional (3D) porous functional materials with special wettability is in urgent demand. In this study, we report a low-cost and salt-tolerant superoleophobic aerogel for efficient oil/seawater separation. The aerogel is prepared through incorporating graphene oxide (GO) into alginate (ALG) matrix by using a facile combined freeze-drying and ionic cross-linking method. The 3D structure interconnected by ALG and GO ensures the high mechanical strength and good flexibility of the developed aerogel. The rough microstructure combined with the hydrophilicity of the aerogel ensures its excellent underwater superoleophobic and antifouling properties. High-content polysaccharides contained in the aerogel guarantees its excellent salt-tolerant property. More impressively, the developed aerogel can retain its underwater superoleophobicity even after 30 days of immersion in seawater, indicating its good stability in marine environments. Furthermore, the aerogel could separate various oil/water mixtures with high separation efficiency (>99%) and good reusability (at least 40 cycles). The facile fabrication process combined with the excellent separation performance makes it promising for practical applications in marine environments.
研究领域:
环境科学
·
材料科学
·
海洋生态学
✓ 已验证
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）