CHEMICAL ENGINEERING JOURNAL
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2018
·
IF 6.735
Shaolong Yang,Zhitao Han,Xinxiang Pan,Bojun Liu,Dongsheng Zhao
UV/chlorine has attracted much attention in flue gas and water treatment fields in recent years. However, only a few studies highlighted gas pollutants removal performance of UV/chlorine method in real water. In this study, nitrogen oxide (NO x ) removal using UV-irradiated electrolyzed seawater (UV/electrolyzed seawater) was explored under simulated seawater environment in a semi-batch photochemical reactor. Comparison experiments between UV/H 2 O 2 and UV/chlorine in both freshwater and seawater systems were performed. Results showed that NO removal efficiency in UV/chlorine freshwater system was higher than those in UV/chlorine seawater system, due to radical scavenging effects of water matrices in seawater. Several strong reactive radicals (e.g., OH, Cl, OCl, ClOH − ) yielded from UV/chlorine system were considered to contribute to NO x removal, among which the role of OH radical was confirmed by radical-trapping experiments. The alkalinity of the seawater adversely impacted contributions of these reactive radicals to NO x removal, which caused a sharp drop in NO x removal efficiencies. Comparatively, the chloride ion in seawater had slight influences on NO x removal efficiencies of UV/electrolyzed seawater. Then, optimization of NO x removal efficiencies against three key variables (active chlorine concentration, UV irradiation dose, and initial pH) was investigated in simulated seawater using Design Expert Software. A regression model of NO x removal efficiency was obtained with satisfactory accuracy. Results indicated that active chlorine concentration and UV irradiation dose significantly influenced NO x removal efficiencies, compared with pH effects. Furthermore, NO x removal mechanisms involved in reactive radicals were discussed for UV/electrolyzed seawater method. Due to pH-dependent characteristics of both active chlorine species and carbonate species in electrolyzed seawater, NO x removal pathways by UV/electrolyzed seawater were different as the environment changed from acid to alkalinity.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
RHEOLOGICA ACTA
·
2018
·Vol. 57
·期 10
·619-633
·
IF 1.833
Zheng Zhi-Ying,Li Feng-Chen,Wang Lu,Li Xiao-Bin,Zhang Hong-Na,Cai Wei-Hua,Zheng Xin
The rheological properties of seawater with the addition of surfactant additive (cetyltrimethyl ammonium chloride (CTAC)/sodium salicylate (NaSal)) are measured at different temperatures, including shear viscosity and first normal stress difference ( N 1 ). The effects of the temperature, the salts, and CTAC/NaSal concentration on the rheological properties of test solutions are investigated, and the corresponding influence mechanisms are analyzed. It shows that the addition of salt can decrease the shear viscosities of the solutions, and also decrease N 1 and even eliminate the sharp augment of N 1 above a certain shear rate. The growing elasticity can be characterized by the increase of the initial shear rate for shear-thickening inception. High temperature can also remove the sharp increase of N 1 with salt. Nevertheless, the increase of CTAC/NaSal concentration can withstand the elimination of the sharp augment of N 1 .
研究领域:
流变学
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物理化学
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产品关联
DOI
高影响因子
JOURNAL OF MOLECULAR LIQUIDS
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2022
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IF 6.633
Lien Zhu,Chunhong Zhang,Feifan Qin,Fuqiu Ma,Changlong Bi,Ruiqi Zhu,Lijia Liu,Jianwei Bai,Hongxing Dong,Toshifumi Satoh
To efficiently and economically extract uranium from seawater, novel amidoxime-modified hypercrosslinked poly(styrene-co-acrylonitrile) (SAN) adsorbents with tunable porous structure were synthesized via simple Friedel-Crafts reaction followed by amidoximation. The adsorbent HCPSAN-B-AO obtained by using biphenyl dichlorobenzyl (BCMBP) as an additional crosslinking agent, possessed a larger pore size and higher surface area due to the longer and more rigid molecular structure of BCMBP compared to the original crosslinking agent 1,2-dichloroethane (DCE), resulting in the higher uranium adsorption capacity of HCPSAN-B-AO. Investigations on the adsorption performance in real seawater containing a large amount of interfering ions showed that the adsorbent owned excellent selectivity for uranyl ions, and the removal percentage of uranium could reach 84.4%. Furthermore, the adsorbent maintained good adsorption performance even after 5 adsorption–desorption cycles, indicating a good recyclability. Investigations on adsorption kinetics, thermodynamics, adsorption isotherms and adsorption mechanism manifested that the adsorption was a rapid (adsorption equilibrium within 30 min), spontaneous and chemical adsorption process (maximum adsorption capacity was 228 mg g −1 ), and the mechanism was mainly the interaction between uranyl ions and amidoxime groups. In summary, the as-prepared adsorbent was a feasible adsorbent for uranium extraction from seawater.
研究领域:
材料科学
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环境科学
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产品关联
DOI
高影响因子
Polymers
·
2021
·Vol. 13
·期 13
·2072
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IF 4.329
Xiaoyan Liu,Ruidan Liu,Tianyu Li,Yanqi Liu,Li Liu,Kai Lyu,Surendra P. Shah
Graphene is a two-dimensional sheet of regular hexagonal honeycomb lattice formed by sp2hybrid orbital bonding, with only one layer thickness of a single atom, which is known as the “super king” of the 21st century. Previous studies have shown that cerium oxide-graphene oxide (CeO2-GO(4:1)) nanocomposites eliminated the agglomeration of graphene to some extent and the CeO2-GO(4:1) epoxy coating could be prepared with good anti-corrosion performance. In this paper, CeO2-GO(4:1) nanocomposites were prepared by the hydrothermal synthesis method, and the three-electrode method was used for electrochemical tests. The state evolution of CeO2-GO(4:1)/EP coating and the synergy between CeO2-GO(4:1)/EP and corrosion inhibitor in simulated seawater solution with different concentrations (20%, 40%, 60%) were analyzed and illustrated by Optical Microscope (OM) characterization, Open Circuit Potential (OCP), Electrochemical alternating current Impedance Spectroscopy (EIS), Mott–Schottky curve and Tafel curve. The results indicated that CeO2-GO(4:1) nanocomposites showed good corrosion resistance in a marine environment. This research lays a solid theoretical foundation for the application of cerium oxide-modified graphene oxide anticorrosive coating in marine engineering.Keywords:CeO2-GO;corrosion inhibitor;simulated seawater;corrosion area
研究领域:
材料科学
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海洋工程
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产品关联
DOI
PubMed
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
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IF 8.6
Haiyan Luo,Haoyu Yao,Min Li,Fanfang Meng,Hui Zhao,Changjiang Yu,Xiangfeng Liang,Huizhou Liu
Efficient extraction of uranium from seawater is of great significance to the stable development of nuclear energy. The graft modification of pectin is expected to realize the efficient extraction of uranium through the dual action of aminoxime and carboxyl groups. In this work, novel biomimetic pectin adsorbents were developed and their performance on the adsorption performance of uranium from seawater was investigated. The physical structure and morphology were characterized by employing FT-IR, BET, SEM and elemental analysis. The skeleton structure and surface functional groups of the pectin-derived adsorbents, which were modified to improve the adsorption selectivity, favored the adsorption of uranium in simulated seawater. The modified apple pectin (MPA) adsorbents exhibited the highest adsorption capacity of 212.27 mg/g at optimal conditions. The thermodynamic results showed that the adsorption of uranium on MPA surface followed the Langmuir single-layer model, and the theoretical maximum adsorption capacity could reach up to 296.25 mg/g. The adsorption process conformed to the pseudo-second-order model. Furthermore, the synergistic mechanism between aminoxime and carboxyl groups of the pectin-based adsorbents was proposed. In conclusion, this work provides a new bio-based adsorbent with high efficiency for uranium extraction from concentrated seawater.
研究领域:
材料科学
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环境科学
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DOI
高影响因子
SEPARATION AND PURIFICATION TECHNOLOGY
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2023
·
IF 8.6
Jialong Wang,Longbin Chen,Yaodong Yang,Tiancheng Hou,Wei-Feng Rao
Piezoelectric catalytic seawater hydrogen production is one of the most crucial and potential hydrogen production strategies. However, the low surface activity and the high carrier recombination rate limit the further improvement of catalytic efficiency. To solve this problem, we prepared SrBi 4 Ti 4 O 15 (SBTO) and FeS 2 (FS) heterojunctions, which can effectively utilize the valence state transformation cycle between Fe 2+ and Fe 3+ to improve the surface activity and maintain carrier separation. This mechanism of Fe 2+ and Fe 3+ conversion is similar to the well-known Fenton reaction. It was confirmed by electrochemical measurements that with the help of FeS 2 , SBTO possessed a stronger piezoelectric current response and faster carrier transfer rate. Piezoelectric catalytic seawater splitting H 2 evolution rate of SBTO-25 %FeS 2 could reach 31 mmol g -1 h −1 , which is higher than that of other piezoelectric materials in similar conditions. Our findings provide valuable insights for further improving the efficiency of seawater hydrogen production efficiency.
研究领域:
材料科学
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能源化学
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产品关联
DOI
高影响因子
Journal of Environmental Chemical Engineering
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2023
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IF 7.7
Jingjing Zhan,Mengxue Ma,Xiujuan Zhang,Minghui Li,Yiwen Zhang,Hao Zhou,Tianxiang Wang
Sulfidated nanoscale zero-valent iron (S-nZVI) particles have demonstrated great potential in the remediation of trichloroethylene (TCE) due to their high reactivity and electron selectivity . However, very few studies have been carried out to investigate their application in salinity water or seawater. In this work, two kinds of S-nZVI particles were prepared through different methods including the chemical reduction method (CH-S-nZVI) and the bioprecipitation method (BP-S-nZVI), and then their performances in TCE remediation in seawater environment were thoroughly compared. The results suggested that the TCE removal by CH-S-nZVI particles in seawater is reduced compared to that in fresh water. However, the difference is negligible for BP-S-nZVI particles. It indicates that the seawater has a relatively strong inhibitory effect on the TCE degradation by CH-S-nZVI, but the inhibition for BP-S-nZVI is very weak. Furthermore, this work verified that sodium chloride and organic matters have obvious inhibitory effects on the TCE dichlorination, while coexisting ions such as NO 3 - , SO 4 2- and Mg 2+ are helpful to the degradation of TCE. The research proved that the performance of BP-S-nZVI particles in seawater is superior to CH-S-nZVI particles, providing a suitable candidate for the treatment of polluted aquifers in coastal and near-shore areas.
研究领域:
环境科学
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化学工程
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产品关联
DOI
高影响因子
ACS Applied Nano Materials
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2023
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IF 5.9
Qiang Xue,Wenqiao Meng,Qing Fang,Jinyuan Zhu,Kaisong Zhang
Over the last decade, thin-film nanocomposite (TFN) membranes have been extensively utilized in desalination and wastewater treatment. The most reported nanochannels in the TFN membranes lack sufficient observational evidence. We conducted a systematic study on the TFN membrane that incorporated two-dimensional (2D) MXene nanosheets and provided evidence that nanovoids existed in the polyamide layer surrounding the nanosheets. The nanovoids functioned as nanochannels for water, which led to a significant increase in membrane permeance by 2.8 times compared to the blank membrane. The Na2SO4 rejection of the MXene polyamide membrane is as high as 96.4% and has obvious advantages in seawater desalination. The size of the nanochannels was correlated with the quantity, size, and spreadability of MXene nanosheets. Larger water nanochannels could be formed if there is a considerable amount and size of nanosheets, and they were evenly distributed. After being subjected to a sustained pressure environment, the nanochannels remained intact and the membrane maintained its excellent permeance across varying pressures. Our work could offer a perspective on the generation of internal nanochannels in the TFN membrane and optimize nanochannels to provide better desalination performance.
研究领域:
材料科学
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环境工程
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化学工程
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纳米技术
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DOI
高影响因子
CARBOHYDRATE POLYMERS
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2025
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IF 12.5
Hailing Shi,Ruihao Ge,Kai Li,Kui Liu,Yixuan Wang,Fengyu Quan,Kewei Zhang,Xing Tian
Solar energy-driven water evaporation technology presents a sustainable method for seawater desalination and wastewater treatment. However, creating a biomass-based interfacial evaporator that achieves high salt resistance and rapid evaporation rates remains a significant challenge. In this study, we prepared a novel foam from carboxymethylated regenerated cellulose fibers, leveraging their natural orientation properties and excellent hydrophilicity. This foam featured hierarchically ordered water transport channels and numerous hydrophilic groups, which enhanced water transport efficiency and decreased the enthalpy of evaporation. The incorporation of polypyrrole gave it effective photothermal conversion properties. The foam demonstrated strong performance in solar-driven water evaporation, achieving an evaporation rate of 3.57 ± 0.04 kg m −2 h −1 under simulated sunlight conditions, with an evaporation efficiency of 93.8 ± 1.5 % and a notable ability to resist salt. This research provides a practical solution for sustainable desalination and holds great potential for the future development of desalination evaporators.
研究领域:
可再生能源
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材料科学
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环境工程
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海水淡化技术
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产品关联
DOI
PubMed
高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
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2021
·
IF 8.128
Chenjie Wang,Ying Wang,Wei Guan,Peng Wang,Jianguang Feng,Na Song,Hongzhou Dong,Liyan Yu,Lina Sui,Zhixing Gan,Lifeng Dong
Solar desalination is considered as a promising approach to solve the shortage of fresh water resources. In this work, inspired by the transpiration of trees, a self-floating and integrated bionic mushroom solar steam generator (BMSSG) is proposed for highly efficient water evaporation. A wooden strip is used to mimic the stipe of the mushroom for water transportation, meanwhile polyvinyl alcohol (PVA) modified graphene aerogels (GA) is used to imitate the pileus of the mushroom for photothermal conversion. After optimizing compositions of the aerogel and sizes of the wooden strip, a high evaporation rate of 1.67 kg m −2 h −1 is obtained, outcompeting most of other wood-based evaporators. Compared to traditional interfacial evaporation devices, BMSSG is an integrated structure without a thermal insulation layer and an absorbent wick, which not only increases the compactness that is good for stability and reliability, but also reduces the manufacturing cost. Moreover, the BMSSG can self-float on the water like a roly-poly. These advantages indicate that BMSSG will play a significant role in seawater desalination. The feasibility as well as stability and recyclability of the BMSSG for seawater desalination are demonstrated. This bioinspired design provides a low-cost and scalable SSG, which will have a profound impact in future practical applications.
研究领域:
材料科学
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环境工程
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可再生能源
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Environmental Chemical Engineering
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2025
·
IF 7.2
Ya-Nan Wang,Yaxin Guo,Jinsong Peng,Jianwei Zhao,Lei Yang,Haiyan Song,Chunxia Chen
s Photocatalytic H 2 O 2 production represents a sustainable and promising avenue for energy and environment. Photoproduction of H 2 O 2 in seawater is potentially an alternative to meet the needs of H 2 O 2 utilization in ocean, while with challenges of competitive ions influence and unsolved photocatalytic mechanism. Herein, we constructed a S-scheme heterojunction with the lamellated WO 3 coated CdS semiconductors for photoproduction of H 2 O 2 in actual seawater. Fragmented WO 3 uniformly spread on surface of dispersed CdS spheres by two steps including calcination and ultrasound. Photocatalyst achieved considerable 1.00 mmol·g cat −1 ·h −1 of H 2 O 2 productivity in seawater without electron-proton donors and pure O 2 , 9.3 % of apparent quantum yield (AQY), as well as good reusability. A co-catalysis concept was proposed to explore specific role of ions in seawater on H 2 O 2 photoproduction. S-scheme heterojunction contributed to migration of electrons and holes on interface between WO 3 and CdS, and further promoted separation of photocarriers, and further opened another channel for H 2 O 2 generation. Accumulated electrons in conduction band (CB) of CdS involved in the main route of two-electron reduction of O 2 for H 2 O 2 production, also promoted generation of •O 2 - for opening the auxiliary route. WO 3 /CdS heterojunction provided fundamentals and opportunities for H 2 O 2 production and applications in abundant seawater as a sustainable way.
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
Journal of Materials Chemistry A
·
2025
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IF 9.5
Yixing Luo,Yang Yang,Yakun Tian,Qingsheng Wu,Wen-Feng Lin,Ming Wen
Transition-metal based layered double hydroxides (TM-LDHs) have attracted widespread attention due to their advantages for the electrocatalytic oxygen evolution reaction (OER). However, their sluggish and unstable reconstruction during the OER has seriously limited their applications in water electrolysis at industrial-level current density. Herein, FeOOH/FeNiCo-LDH heterogeneous nanosheets (2.1 nm in thickness) are uniformly integrated on honeycomb-channel N-doped carbon (FeOOH/FeNiCo-LDH/HCNC) through a self-sacrificing and dual-ion etching strategy. Thermodynamically favoured hydrogen/electron-capturing ability of FeOOH together with kinetically favoured rapid mass/electron transfer efficiency of conductive HCNC collaboratively accelerates the reconstruction of FeNiCo-LDH to generate highly active and stable FeNiCoOOH species, which displays an optimal reaction pathway with reduced energy barrier for the OER. Consequently, FeOOH/FeNiCo-LDH/HCNC exhibits superior OER activity in both alkaline freshwater (η10 = 258 mV with Tafel slope of 32.4 mV dec−1) and alkaline natural seawater (η10 = 296 mV with Tafel slope of 54.7 mV dec−1). When applied in anion exchange membrane electrolyzer as OER electrocatalyst, FeOOH/FeNiCo-LDH/HCNC achieves outstanding stability with low cell-voltage increase rates of 1.7 mV h−1 (freshwater) and 1.5 mV h−1 (seawater) over 120 h at the industrially required current density of 500 mA cm−2. This study proposed an ingenious reconstruction strategy for advanced TM-LDH electrocatalysts toward industrial applications.
研究领域:
材料科学
·
电化学
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产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）