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Facile fabrication of dolomite-doped biochar/bentonite for effective removal of phosphate from complex wastewaters

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 6, doi: 10.1007/s11783-023-1671-7

Abstract:

● Dolomite-doped biochar/bentonite was synthesized for phosphate removal.

Keywords： Biochar-bentonite composite     Dolomite doping     Phosphate adsorption     Polymeric matrix membrane     Adsorption-filtrationdual functions     Low-concentration phosphate    

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Migration of manganese and iron during the adsorption-regeneration cycles for arsenic removal

Fangfang CHANG, Jiuhui QU, Xu ZHAO, Wenjun LIU, Kun WU

Frontiers of Environmental Science & Engineering 2011, Volume 5, Issue 4,   Pages 512-518 doi: 10.1007/s11783-011-0372-9

Abstract: Four consecutive adsorption cycles were operated under the following conditions: Initial arsenic concentration4500 bed volumes of eligible effluent (arsenic concentration≤0.01 mg·L ) were obtained in four As(III) adsorptionwhile about 2000, 2300, 2500, and 3100 bed volumes of eligible effluent were obtained in four As(V) adsorption

Keywords： arsenic     adsorption     filtration     regeneration     fixed-bed    

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Dual-functional sites for synergistic adsorption of Cr(VI) and Sb(V) by polyaniline-TiO hydrate: Adsorption

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1526-7

Abstract: OH)n(4–n)+ exhibited excellent adsorption

Keywords： Polyaniline/TiO2     Chromium     Antimony     Adsorption     Desorption     Mechanism    

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Laboratory study on high-temperature adsorption of HCl by dry-injection of Ca(OH)

Junjun TAN,Guohua YANG,Jingqiao MAO,Huichao DAI

Frontiers of Environmental Science & Engineering 2014, Volume 8, Issue 6,   Pages 863-870 doi: 10.1007/s11783-013-0618-9

Abstract: This paper presents a laboratory study on the dry adsorption of HCl.The experiments were conducted in a dual-layer granular bed filter, at gas temperatures of 500°C–700°Mainly, the adsorption efficiency of HCl and utilization efficiency of Calcium were studied, by varyingThe results also demonstrated that the feeding at a constant pressure was more effective, and the HCl adsorptionFurthermore, the HCl adsorption efficiency was found to be slightly promoted by water vapor, while could

Keywords： acid gas HCl     Ca(OH)2     dry adsorption     high temperature     dual-layer granular bed filter    

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Characterization of particle deposition during crossflow filtration as influenced by permeate flux andcrossflow velocity using a microfluidic filtration system

Hongzhan Di, Gregory J. O. Martin, Dave E. Dunstan

Frontiers of Chemical Science and Engineering 2021, Volume 15, Issue 3,   Pages 552-561 doi: 10.1007/s11705-020-1962-5

Abstract: Particle deposition during crossflow filtration is significantly influenced by the operating conditionsThis study uses a microfluidic visualisation filtration system to examine the influence of operatingan empirical correlation between the deposition probability and volume of deposition as function of filtrationThis could be useful for predicting the dynamic deposition process during crossflow filtration over a

Keywords： particle deposition     crossflow filtration     microfluidics     confocal microscopy    

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The energy-free purification of trace thallium(I)-contaminated potable water using a high-selective filter paper with multi-layered Prussian blue decoration

Frontiers of Chemical Science and Engineering doi: 10.1007/s11705-023-2379-8

Abstract: Thallium is a highly toxic metal, and trace amount of thallium(I) (Tl+) in potable water could cause a severe water crisis, which arouses the exploitation of highly-effective technology for purification of Tl+ contaminated water. This report proposes the multi-layered Prussian blue (PB)-decorated composite membranes (PBx@PDA/PEI-FP) based on the aminated filter papers for Tl+ uptake. Extensively characterization by Fourier transform infrared spectrometer-attenuated total reflectance, scanning electron microscope, thermogravimetric analysis, X-ray photoelectron spectroscopy and X-ray diffraction were performed to confirm the in situ growth of cubic PB crystals on filter paper membrane surfaces via the aminated layers, and the successful fabrication of multi-layered PB overcoats via the increasing of aminated layers. The effect of PB layers on Tl+ removal by PBx@PDA/PEI-FP from simulated drinking water was evaluated as well as the influence of different experimental conditions. A trade-off between PB decoration layer number and PB distribution sizes is existed in Tl+ uptake by PBx@PDA/PEI-FP. The double-layered PB2@PDA/PEI-FP membrane showed the maximum sorption capacity, but its Tl+ uptake performance was weakened by the acid, coexisting ions (K+ and Na+) and powerful operation pressure, during filtrating a large volume of low-concentrated Tl+-containing water. However, the negative effect of coexisting ions on the Tl+ uptake could be effectively eliminated in weak alkaline water, and the Tl+ removal was increased up to 100% without any pressure driving for PB2@PDA/PEI-FP membrane. Most importantly, PB2@PDA/PEI-FP displayed the high-efficiency and high-selectivity in purifying the Tl+-spiked Pearl River water, in which the residual Tl+ in filtrate was less than 2 μg·L–1 to meet the drinking water standard of United States Environmental Protection Agency. This work provides a feasible avenue to safeguard the drinking water in remote and underdeveloped area via the energy-free operation.

Keywords： membrane adsorption     Prussian blue     energy-free filtration     potable water     trace thallium(I)    

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Removal of virus aerosols by the combination of filtration and UV-C irradiation

Frontiers of Environmental Science & Engineering 2023, Volume 17, Issue 3, doi: 10.1007/s11783-023-1627-y

Abstract:

● The removal of virus aerosols by filtration and UV-C irradiation

Keywords： Filtration system     UV-C irradiation     Virus aerosol     Public health     COVID-19    

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Occurrence of bisphenol A in surface and drinking waters and its physicochemical removal technologies

Liping LIANG,Jing ZHANG,Pian FENG,Cong LI,Yuying HUANG,Bingzhi DONG,Lina LI,Xiaohong GUAN

Frontiers of Environmental Science & Engineering 2015, Volume 9, Issue 1,   Pages 16-38 doi: 10.1007/s11783-014-0697-2

Abstract: technology options in eliminating BPA can be divided into four categories: oxidation, advanced oxidation, adsorptionand membrane filtration.Without formation of harmful by-products, physical separation methods such as activated carbon adsorptionremoval efficiency when the membrane became saturated may limit the application of activated carbon adsorptionHybrid processes, e.g. combining adsorption and biologic process or combining membrane and oxidation

Keywords： Bisphenol A (BPA)     occurrence     conventional oxidation     advanced oxidation     adsorption     membrane filtration    

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Stormwater treatment: examples of computational fluid dynamics modeling

Gaoxiang YING, John SANSALONE, Srikanth PATHAPATI, Giuseppina GAROFALO, Marco MAGLIONICO, Andrea BOLOGNESI, Alessandro ARTINA

Frontiers of Environmental Science & Engineering 2012, Volume 6, Issue 5,   Pages 638-648 doi: 10.1007/s11783-012-0442-7

Abstract: Control of rainfall-runoff particulate matter (PM) and PM-bound chemical loads is challenging; in part due to the wide gradation of PM complex geometries of many unit operations and variable flow rates. Such challenges and the expense associated with resolving such challenges have led to the relatively common examination of a spectrum of unit operations and processes. This study applies the principles of computational fluid dynamics (CFD) to predict the particle and pollutant clarification behavior of these systems subject to dilute multiphase flows, typical of rainfall-runoff, within computationally reasonable limits, to a scientifically acceptable degree of accuracy. The Navier-Stokes (NS) system of nonlinear partial differential equations for multi-phase hydrodynamics and separation of entrained particles are solved numerically over the unit operation control volume with the boundary and initial conditions defined and then solved numerically until the desired convergence criteria are met. Flow rates examined are scaled based on sizing of common unit operations such as hydrodynamic separators (HS), wet basins, or filters, and are examined from 1 to 100 percent of the system maximum hydraulic operating flow rate. A standard turbulence model is used to resolve flow, and a discrete phase model (DPM) is utilized to examine the particle clarification response. CFD results closely follow physical model results across the entire range of flow rates. Post-processing the CFD predictions provides an in-depth insight into the mechanistic behavior of unit operations by means of three dimensional (3-D) hydraulic profiles and particle trajectories. Results demonstrate the role of scour in the rapid degradation of unit operations that are not maintained. Comparisons are provided between measured and CFD modeled results and a mass balance error is identified. CFD is arguably the most powerful tool available for our profession since continuous simulation modeling.

Keywords： stormwater     unit operations and processes (UOPs)     hydrodynamic separation     filtration     adsorption     computational    

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Enhanced cross-flow filtration with flat-sheet ceramic membranes by titanium-based coagulation for membrane

Frontiers of Environmental Science & Engineering 2022, Volume 16, Issue 8, doi: 10.1007/s11783-022-1531-x

Abstract:

• Ceramic membrane filtration showed high performance for surface water

Keywords： Ceramic membrane     Coagulation     Polytitanium chloride     Membrane fouling    

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Membrane fouling control by ultrasound in an anaerobic membrane bioreactor

SUI Pengzhe, WEN Xianghua, HUANG Xia

Frontiers of Environmental Science & Engineering 2007, Volume 1, Issue 3,   Pages 362-367 doi: 10.1007/s11783-007-0062-9

Abstract: The experimental results showed that the membrane fouling was controlled so well that membrane filtration

Keywords： membrane filtration     filtration resistance     different     feasible ultrasonic     anaerobic membrane    

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Research of Refinement Methods of Dynamic Model Based on Frequency Response Functions

Zhu Dangdang,Feng Yaoqi,Xiang Shuhong

Strategic Study of CAE 2005, Volume 7, Issue 8,   Pages 89-94

Abstract: dynamic model improvement methods, and researched the refinement methods based on frequency and response functionsIn order to make the full use of the frequency and response functions obtained in the vibration test,the paper introduced three dynamic model improvement methods with frequency and response functions such

Keywords： spacecraft     dynamics     frequency and response functions     model refinement    

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and computational assessment of 1,4-Dioxane degradation in a photo-Fenton reactive ceramic membrane filtration

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 5, doi: 10.1007/s11783-020-1341-y

Abstract:

• 1,4-Dioxane was degraded via the photo-Fenton reactive membrane filtration

Keywords： Photo-Fenton     Ceramic membrane     1     4-Dioxane     Goethite    

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Silica-based nanoarchitecture for an optimal combination of photothermal and chemodynamic therapy functions

Frontiers of Chemical Science and Engineering 2023, Volume 17, Issue 12,   Pages 2144-2155 doi: 10.1007/s11705-023-2362-4

Abstract: This study introduces multifunctional silica nanoparticles that exhibit both high photothermal and chemodynamic therapeutic activities, in addition to luminescence. The activity of the silica nanoparticles is derived from their plasmonic properties, which are a result of infusing the silica nanoparticles with multiple Cu2–xS cores. This infusion process is facilitated by a recoating of the silica nanoparticles with a cationic surfactant. The key factors that enable the internal incorporation of the Cu2–xS cores and the external deposition of red-emitting carbon dots are identified. The Cu2–xS cores within the silica nanoparticles exhibit both self-boosting generation of reactive oxygen species and high photothermal conversion efficacy, which are essential for photothermal and chemodynamic activities. The silica nanoparticles’ small size (no more than 70 nm) and high colloidal stability are prerequisites for their cell internalization. The internalization of the red-emitting silica nanoparticles within cells is visualized using fluorescence microscopy techniques. The chemodynamic activity of the silica nanoparticles is associated with their dark cytotoxicity, and the mechanisms of cell death are evaluated using an apoptotic assay. The photothermal activity of the silica nanoparticles is demonstrated by significant cell death under near-infrared (1064 nm) irradiation.

Keywords： copper sulfide nanoparticles     chemodynamic therapy     photothermal therapy     carbon dots     silica nanoparticles    

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One-Step Reverse Osmosis Based on Riverbank Filtration for Future Drinking Water Purification Perspective

Yujia Zhai, Gang Liu, Walter G.J. van der Meer

Engineering 2022, Volume 9, Issue 2,   Pages 27-34 doi: 10.1016/j.eng.2021.02.015

Abstract: This article introduces a one-step reverse osmosis (OSRO) concept consisting of riverbank filtrationArtificial bank filtration (ABF), which functions as an artificial recharge in combination with a sandfiltration system, is proposed as an alternative for RBF in the OSRO concept to supply drinking water

Keywords： Drinking water treatment     River bank filtration     Reverse osmosis     Artificial bank filtration     Water reclamation    

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Title Author Date Type Operation

Facile fabrication of dolomite-doped biochar/bentonite for effective removal of phosphate from complex wastewaters

Journal Article

Migration of manganese and iron during the adsorption-regeneration cycles for arsenic removal

Fangfang CHANG, Jiuhui QU, Xu ZHAO, Wenjun LIU, Kun WU

Journal Article

Dual-functional sites for synergistic adsorption of Cr(VI) and Sb(V) by polyaniline-TiO hydrate: Adsorption

Journal Article

Laboratory study on high-temperature adsorption of HCl by dry-injection of Ca(OH)

Junjun TAN,Guohua YANG,Jingqiao MAO,Huichao DAI

Journal Article

Characterization of particle deposition during crossflow filtration as influenced by permeate flux andcrossflow velocity using a microfluidic filtration system

Hongzhan Di, Gregory J. O. Martin, Dave E. Dunstan

Journal Article

The energy-free purification of trace thallium(I)-contaminated potable water using a high-selective filter paper with multi-layered Prussian blue decoration

Journal Article

Removal of virus aerosols by the combination of filtration and UV-C irradiation

Journal Article

Occurrence of bisphenol A in surface and drinking waters and its physicochemical removal technologies

Liping LIANG,Jing ZHANG,Pian FENG,Cong LI,Yuying HUANG,Bingzhi DONG,Lina LI,Xiaohong GUAN

Journal Article

Stormwater treatment: examples of computational fluid dynamics modeling

Gaoxiang YING, John SANSALONE, Srikanth PATHAPATI, Giuseppina GAROFALO, Marco MAGLIONICO, Andrea BOLOGNESI, Alessandro ARTINA

Journal Article

Enhanced cross-flow filtration with flat-sheet ceramic membranes by titanium-based coagulation for membrane

Journal Article

Membrane fouling control by ultrasound in an anaerobic membrane bioreactor

SUI Pengzhe, WEN Xianghua, HUANG Xia

Journal Article

Research of Refinement Methods of Dynamic Model Based on Frequency Response Functions

Zhu Dangdang,Feng Yaoqi,Xiang Shuhong

Journal Article

and computational assessment of 1,4-Dioxane degradation in a photo-Fenton reactive ceramic membrane filtration

Journal Article

Silica-based nanoarchitecture for an optimal combination of photothermal and chemodynamic therapy functions

Journal Article

One-Step Reverse Osmosis Based on Riverbank Filtration for Future Drinking Water Purification

Yujia Zhai, Gang Liu, Walter G.J. van der Meer

Journal Article