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Effect of seawater salinity on the synthesis of zeolite from coal fly ash

Yanqing YU, Xiaoliang LI, Xiaolan ZOU, Xiaobin ZHU

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 1,   Pages 54-61 doi: 10.1007/s11783-013-0493-4

Abstract: by hydrothermal activation after alkali fusion and coal fly ash (CFA) was used as raw material with seawaterSeawater salinity was varied from 32 to 88 for zeolite crystallization during the hydrothermal processThe results show that seawater salinity plays an important role in zeolite synthesis with CFA duringThe products were a mixture of NaX zeolite and hydroxysodalite; seawater salinity more strongly affectedrate of 48%–62% as the salinity increased from 32 to 88, respectively.

Keywords： coal fly ash (CFA)     seawater salinity     zeolite synthesis    

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Salinity exchange between seawater/brackish water and domestic wastewater through electrodialysis for

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 2, doi: 10.1007/s11783-023-1616-1

Abstract:

● Present a general concept called “salinity exchange”.

Keywords： Desalination     Potable water reuse     Ion-exchange membrane     Salinity gradient energy     Wastewater discharge    

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Responses of microbial interactions to elevated salinity in activated sludge microbial community

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 5, doi: 10.1007/s11783-023-1660-x

Abstract:

● Salinity led to the elevation of NAR over 99.72%.

Keywords： Elevated salinity     Activated sludge system     Pollution removal     Microbial interactions     Competitive relationship    

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Multistage-batch bipolar membrane electrodialysis for base production from high-salinity wastewater

Frontiers of Chemical Science and Engineering 2022, Volume 16, Issue 5,   Pages 764-773 doi: 10.1007/s11705-021-2114-2

Abstract: Bipolar membrane electrodialysis (BMED) is considered a state-of-the-art technology for the conversion of salts into acids and bases. However, the low concentration of base generated from a traditional BMED process may limit the viability of this technology for a large-scale application. Herein, we report an especially designed multistage-batch (two/three-stage-batch) BMED process to increase the base concentration by adjusting different volume ratios in the acid (Vacid), base (Vbase), and salt compartments (Vsalt). The findings indicated that performance of the two-stage-batch with a volume ratio of Vacid:Vbase:Vsalt = 1:1:5 was superior in comparison to the three-stage-batch with a volume ratio of Vacid:Vbase:Vsalt = 1:1:2. Besides, the base concentration could be further increased by exchanging the acid produced in the acid compartment with fresh water in the second stage-batch process. With the two-stage-batch BMED, the maximum concentration of the base can be obtained up to 3.40 mol∙L–1, which was higher than the most reported base production by BMED. The low energy consumption and high current efficiency further authenticate that the designed process is reliable, cost-effective, and more productive to convert saline water into valuable industrial commodities.

Keywords： bipolar membrane electrodialysis     multistage-batch     base production     high-salinity wastewater    

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Nonlinear sealing force of a seawater balance valve used in an 11000-meter manned submersible

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 1, doi: 10.1007/s11465-022-0726-y

Abstract: Balance valve is a core component of the 11000-meter manned submersible “struggle,” and its sealing performance is crucial and challenging when the maximum pressure difference is 118 MPa. The increasing sealing force improves the sealing performance and increases the system’s energy consumption at the same time. A hybrid analytical–numerical–experimental (ANE) model is proposed to obtain the minimum sealing force, ensuring no leakage at the valve port and reducing energy consumption as much as possible. The effects of roundness error, environmental pressure, and materials on the minimum sealing force are considered in the ANE model. The basic form of minimum sealing force equations is established, and the remaining unknown coefficients of the equations are obtained by the finite element method (FEM). The accuracy of the equation is evaluated by comparing the independent FEM data to the equation data. Results of the comparison show good agreement, and the difference between the independent FEM data and equation data is within 3% when the environmental pressure is 0–118 MPa. Finally, the minimum sealing force equation is applied in a balance valve to be experimented using a deep-sea simulation device. The balance valve designed through the minimum sealing force equation is leak-free in the experiment. Thus, the minimum sealing force equation is suitable for the ultrahigh pressure balance valve and has guiding significance for evaluating the sealing performance of ultrahigh pressure balance valves.

Keywords： seawater balance valve     sealing performance     hybrid ANE model     FEM     minimum sealing force equation    

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Compressive behavior and microstructure of concrete mixed with natural seawater and sea sand

Frontiers of Structural and Civil Engineering 2021, Volume 15, Issue 6,   Pages 1347-1357 doi: 10.1007/s11709-021-0780-2

Abstract: Noncorrosive reinforcement materials facilitate producing structural concrete with seawater and sea sandThis study investigated the properties of seawater and sea sand concrete (SSC), considering the curingXRD patterns identified Friedel’s salt phase due to the chlorides brought by seawater and sea sand.

Keywords： seawater and sea sand concrete     compressive strength     strain field     microstructure     hydration products    

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A “Seawater-in-Sludge” approach for capacitive biochar production via the alkaline and alkaline earth

Xiling Li, Tianwei Hao, Yuxin Tang, Guanghao Chen

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 1, doi: 10.1007/s11783-020-1295-0

Abstract: . • Seawater was proved to be an alternative activation agent. • Minerals vaporization increased thethe graphitization degree of biochar when comparing the pyrolysis of sewage sludge without seawater.This leads to seawater activated biochar electrodes with lower resistance, higher capacitance of 113.9F/g comparing with control groups without seawater.Leveraging the global increase in the salinity of groundwater, especially in coastal areas, these findings

Keywords： Sewage sludge     Biochar     Seawater     Recourse recovery     Capacitor    

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Effect of salinity on community structure and naphthalene dioxygenase gene diversity of a halophilic

Tingting Fang, Ruisong Pan, Jing Jiang, Fen He, Hui Wang

Frontiers of Environmental Science & Engineering 2016, Volume 10, Issue 6, doi: 10.1007/s11783-016-0888-0

Abstract: The aim of this study is to analyze the effect of salinity on polycyclic aromatic hydrocarbons (PAHs)subunits were dominant at salinities ranging from 0.1% to 20%, while not been clearly detected at 25% salinityConsistently, the biodegradation occurred at salinities ranging from 0.1% to 20%, while no at 25% salinityWe concluded that salinity greatly affected halophilic bacterial community structure and also the functional

Keywords： Phenanthrene     Halophilic bacteria     Gene diversity     Naphthalene dioxygenase genes    

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An overview and recent advances in electrocatalysts for direct seawater splitting

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 6,   Pages 1408-1426 doi: 10.1007/s11705-021-2102-6

Abstract: In comparison to pure water, seawater is widely accepted as an unlimited resource.The direct seawater splitting is economical and eco-friendly, but the key challenges in seawater, especiallyThe development of earth-abundant electrocatalysts toward direct seawater splitting has emerged as aThis review first discusses the macroscopic understanding of direct seawater electrolysis and then focuseson the strategies for rational design of electrocatalysts toward direct seawater splitting.

Keywords： seawater splitting     electrocatalysts     oxygen evolution reaction     hydrogen evolution reaction     chlorine    

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strong>x nanosheets on Ni foam as an electrocatalyst for efficient overall alkaline seawater

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 11,   Pages 1698-1706 doi: 10.1007/s11705-023-2334-8

Abstract: NiFeRuOx/NF displays high electrocatalytic activity and stability for overall alkaline seawater

Keywords： NiFeRuOx nanosheets     Ni foam     electrocatalysis     overall seawater splitting     solar-driven    

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Water pumping analysis and experimental validation of beach well infiltration intake system in a seawater

Huan ZHANG,Shu LIU,Xuejing ZHENG,Gaofeng CHEN

Frontiers in Energy 2015, Volume 9, Issue 3,   Pages 335-342 doi: 10.1007/s11708-015-0365-7

Abstract: conservation equation and Darcy’s law, a model of beach well infiltration intake system applied in a seawaterThe model consists of the seawater seepage and the heat transfer process.

Keywords： water pumping analysis     experimental validation     infiltration intake system     seawater source heat pump    

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Seawater Desalination Technology and Solar Energy Utilization

Zhang Yaoming,Zou Ningyu

Strategic Study of CAE 2005, Volume 7, Issue 11,   Pages 37-41

Abstract:

Seawater desalination provides a new approach to settle the water supply crisis,but a large amountEach of the several existing methods for seawater desalination has its own advantages and disadvantagescan be used as a good energy source, which is clean and brings no pollution to the environment, for seawater

Keywords： seawater desalination     solar energy     heliostat     energy source     water supply    

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Performance of activated carbon coated graphite bipolar electrodes on capacitive deionization method for salinity

Hossein D. Atoufi, Hasti Hasheminejad, David J. Lampert

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 6, doi: 10.1007/s11783-020-1278-1

Abstract: This research investigates a capacitive deionization method for salinity reduction in a batch reactor

Keywords： Capacitive deionization (CDI)     Desalination     Electrical conductivity (EC)     Graphite bipolar electrode     Activated carbon coated (ACC)    

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heterotrophic nitrification-aerobic denitrification bacterium TJPU05 suitable for nitrogen removal from high-salinity

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 6, doi: 10.1007/s11783-021-1503-6

Abstract:

• H. venusta TJPU05 showed excellent HN-AD ability at high salinity

Keywords： Salt-tolerant bacteria     H. venusta TJPU05     Heterotrophic nitrification and aerobic denitrification     High-salinity    

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Surface modification of mesoporous silica nanoparticle with 4-triethoxysilylaniline to enhance seawater

Jian Wang, Qun Wang, Xueli Gao, Xinxia Tian, Yangyang Wei, Zhen Cao, Chungang Guo, Huifeng Zhang, Zhun Ma, Yushan Zhang

Frontiers of Environmental Science & Engineering 2020, Volume 14, Issue 1, doi: 10.1007/s11783-019-1185-5

Abstract: AMSN-based TFN-RO membranes were prepared for seawater desalination.

Keywords： Thin film nanocomposite membrane     Reverse osmosis     Seawater desalination     Aminophenyl-functionalized mesoporous    

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Title Author Date Type Operation

Effect of seawater salinity on the synthesis of zeolite from coal fly ash

Yanqing YU, Xiaoliang LI, Xiaolan ZOU, Xiaobin ZHU

Journal Article

Salinity exchange between seawater/brackish water and domestic wastewater through electrodialysis for

Journal Article

Responses of microbial interactions to elevated salinity in activated sludge microbial community

Journal Article

Multistage-batch bipolar membrane electrodialysis for base production from high-salinity wastewater

Journal Article

Nonlinear sealing force of a seawater balance valve used in an 11000-meter manned submersible

Journal Article

Compressive behavior and microstructure of concrete mixed with natural seawater and sea sand

Journal Article

A “Seawater-in-Sludge” approach for capacitive biochar production via the alkaline and alkaline earth

Xiling Li, Tianwei Hao, Yuxin Tang, Guanghao Chen

Journal Article

Effect of salinity on community structure and naphthalene dioxygenase gene diversity of a halophilic

Tingting Fang, Ruisong Pan, Jing Jiang, Fen He, Hui Wang

Journal Article

An overview and recent advances in electrocatalysts for direct seawater splitting

Journal Article

strong>x nanosheets on Ni foam as an electrocatalyst for efficient overall alkaline seawater

Journal Article

Water pumping analysis and experimental validation of beach well infiltration intake system in a seawater

Huan ZHANG,Shu LIU,Xuejing ZHENG,Gaofeng CHEN

Journal Article

Seawater Desalination Technology and Solar Energy Utilization

Zhang Yaoming,Zou Ningyu

Journal Article

Performance of activated carbon coated graphite bipolar electrodes on capacitive deionization method for salinity

Hossein D. Atoufi, Hasti Hasheminejad, David J. Lampert

Journal Article

heterotrophic nitrification-aerobic denitrification bacterium TJPU05 suitable for nitrogen removal from high-salinity

Journal Article

Surface modification of mesoporous silica nanoparticle with 4-triethoxysilylaniline to enhance seawater

Jian Wang, Qun Wang, Xueli Gao, Xinxia Tian, Yangyang Wei, Zhen Cao, Chungang Guo, Huifeng Zhang, Zhun Ma, Yushan Zhang

Journal Article