scholarly journals Ceramic Ultrafiltration and Nanofiltration Membrane for Removal of Black Carbon Ink, Blue Dye Ink, Fe3+ and Cu2+ Ions from Water

2020 ◽  
Author(s):  
Zhiqiang Wang ◽  
Tian Cheng Wang
Keyword(s):  
Pore Size ◽  
Black Carbon ◽  
Water Solution ◽  
Blue Dye ◽  
Nanofiltration Membrane ◽  
Air Filtration ◽  
Patient Room ◽  
Ceramic Filters ◽  
Flat Sheet ◽  
Α Al2o3

This paper reports on performance of ceramic ultrafiltration and nanofiltration membrane to remove carbon ink particles, blue ink dye, Fe3+ and Cu2+ ions from water. The ceramic filters have α-Al2O3 flat-sheet supporter, with TiO2 nanoparticles sintered membrane on the surface of supporter. Carbon ink particles, blue ink dye, FeCl3 and CuSO4 water solution were used to test their filtration performance. The results show that the ceramic ultrafilter can 100% decolored the black carbon solution. The nanomembrane can 100% decolored blue ink dye, FeCl3 and CuSO4 solution. Electrical conductivity rate of ironflocculated dye waste water from a textile company can be reduced by the nanomembrane from 4000 μs/cm to 1000 μs/cm. It assumed that the ultramembrane pore size is about 10 nm, and the nanomembrane pore size might be 1 nm. The performance can fulfill the requirements for removal of heavy metal ions, materials with molecule bigger than 250 Dalton and salts retention from water, air filtration of novel corona virus defending mask and negative pressure patient room.

scholarly journals Ceramic Ultrafiltration and Nanofiltration Membrane for Removal of Black Carbon Ink, Blue Dye Ink, Fe3+ and Cu2+ Ions from Water

2020 ◽  
Author(s):  
Zhiqiang Wang ◽  
Tian Cheng Wang
Keyword(s):  
Pore Size ◽  
Black Carbon ◽  
Water Solution ◽  
Blue Dye ◽  
Nanofiltration Membrane ◽  
Air Filtration ◽  
Patient Room ◽  
Ceramic Filters ◽  
Flat Sheet ◽  
Α Al2o3

This paper reports on performance of ceramic ultrafiltration and nanofiltration membrane to remove carbon ink particles, blue ink dye, Fe3+ and Cu2+ ions from water. The ceramic filters have α-Al2O3 flat-sheet supporter, with TiO2 nanoparticles sintered membrane on the surface of supporter. Carbon ink particles, blue ink dye, FeCl3 and CuSO4 water solution were used to test their filtration performance. The results show that the ceramic ultrafilter can 100% decolored the black carbon solution. The nanomembrane can 100% decolored blue ink dye, FeCl3 and CuSO4 solution. Electrical conductivity rate of ironflocculated dye waste water from a textile company can be reduced by the nanomembrane from 4000 μs/cm to 1000 μs/cm. It assumed that the ultramembrane pore size is about 10 nm, and the nanomembrane pore size might be 1 nm. The performance can fulfill the requirements for removal of heavy metal ions, materials with molecule bigger than 250 Dalton and salts retention from water, air filtration of novel corona virus defending mask and negative pressure patient room.

scholarly journals Air filtration improvement of konjac glucomannan-based aerogel air filters through physical structure design

2021 ◽  
Author(s):  
Hong Qian ◽  
Ying Fang ◽  
Kao Wu ◽  
Hao Wang ◽  
Bin Li ◽  
...  
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Surface Area ◽  
Physical Structure ◽  
Structure Design ◽  
Air Filtration ◽  
Air Filters ◽  
Air Filter ◽  
Purification Time

Abstract This study presents two methods to improve the air filtration performance of konjac glucomannan (KGM)-based aerogel air filters through physical structure design by changing the pore-size distribution and the surface area, using an air purifier. Results indicated that KGM-based aerogels had a comparable filtration effect with the commercial air filter with a longer purification time. This purification time could be shortened by over 50%, by changing the pore-size distribution from large size to small size or increase the surface area with the fold structure. This should boost the development of polysaccharide-based aerogel used as the air filter.

scholarly journals Sodium Solid Electrolytes: NaxAlOy Bilayer-System Based on Macroporous Bulk Material and Dense Thin-Film

Materials ◽  
2021 ◽  
Vol 14 (4) ◽  
pp. 854
Author(s):  
Antonia Hoppe ◽  
Cornelius Dirksen ◽  
Karl Skadell ◽  
Michael Stelter ◽  
Matthias Schulz ◽  
...  
Keyword(s):  
Pore Size ◽  
Bulk Material ◽  
Sol Gel ◽  
Dense Layer ◽  
X Ray Diffraction ◽  
Bilayer System ◽  
Step Procedure ◽  
Short Circuits ◽  
Α Al2o3 ◽  
Sol Gel Synthesis

A new preparation concept of a partially porous solid-state bilayer electrolyte (BE) for high-temperature sodium-ion batteries has been developed. The porous layer provides mechanical strength and is infiltrated with liquid and highly conductive NaAlCl4 salt, while the dense layer prevents short circuits. Both layers consist, at least partially, of Na-β-alumina. The BEs are synthesized by a three-step procedure, including a sol-gel synthesis, the preparation of porous, calcined bulk material, and spin coating to deposit a dense layer. A detailed study is carried out to investigate the effect of polyethylene oxide (PEO) concentration on pore size and crystallization of the bulk material. The microstructure and crystallographic composition are verified for all steps via mercury intrusion, X-ray diffraction, and scanning electron microscopy. The porous bulk material exhibits an unprecedented open porosity for a NaxAlOy bilayer-system of ≤57% with a pore size of ≈200–300 nm and pore volume of ≤0.3 cm3∙g−1. It contains high shares of crystalline α-Al2O3 and Na-β-alumina. The BEs are characterized by impedance spectroscopy, which proved an increase of ionic conductivity with increasing porosity and increasing Na-β-alumina phase content in the bulk material. Ion conductivity of up to 0.10 S∙cm−1 at 300 °C is achieved.

scholarly journals Development of Needle-Punched Nonwoven Fabrics from Reclaimed Fibers for Air Filtration Applications

2014 ◽  
Vol 9 (1) ◽  
pp. 155892501400900 ◽  
Author(s):  
S. Sakthivel ◽  
Anban J.J. Ezhil ◽  
T. Ramachandran
Keyword(s):  
Pore Size Distribution ◽  
Pore Size ◽  
Size Distribution ◽  
Air Permeability ◽  
Filtration Efficiency ◽  
Raw Material ◽  
Fine Tuning ◽  
Physical Parameters ◽  
Air Filtration ◽  
Nonwoven Fabrics

This paper reports an investigative study on the fabrication and measurement of the air permeability, mechanical properties, pore size distribution, and filtration efficiency of different nonwoven fabrics produced from reclaimed fibers by analytically changing the machine variables to manipulate the physical parameters of the nonwoven fabrics. Reclaimed fiber of cotton (60%) and polyester (40%) blend was used, so that the prospect of value addition to an inexpensive source of raw material could be explored. The changes in air permeability were interpreted in terms of fabric density profile and pore size distribution. The filtration parameters of filtration efficiency, dust holding capacity, and pressure drop were also calculated. Additionally, the effects of calendering on pore size and filtration properties were evaluated to discover the opportunity of fine-tuning and the performance of the filters. The outcome in this study reflected an overall development in all filtration characteristics due to the calendering operation.

scholarly journals Experimental investigation of the parameters of water solution purposes by ceramic, coal filters and reverse-osmotic module

2019 ◽  
pp. 30-33
Author(s):  
S.V. Gulienko
Keyword(s):  
Reverse Osmosis ◽  
Water Solution ◽  
Ceramic Filter ◽  
Main Process ◽  
Working Pressure ◽  
Ceramic Filters ◽  
Quality Of Water ◽  
Urgent Task ◽  
Wide Range ◽  
Series Of Experiments

The urgent task is to research in detail the possibilities of operation of the reverse osmosis membrane in the conditions of changing various parameters, which include, first of all, the working pressure, the initial concentration of the cleaning solutions, as well as the working conditions and the complete set of cleaning stands with auxiliary filters: mechanical, ceramic and carbon, which improves the quality of water and increases the life of high-value reverse osmosis modules. Particular attention was paid in this series of experiments to the role of ceramic filters, since in the previous series of experiments the concentration of the solution did not change both after mechanical and after carbon filters. Therefore, it was decided to modernize the stand and use a ceramic filter in the flow chart. In this work the detailed scheme of bench-scale setup with using of ceramic and carbon filters and also reverse-osmosis module is represented. The experimental reseaches of purification of NaCl water solutions were carried out in wide range of concentrations (0,2∙10-3…6,5 g/l) and working pressures (0,2…0,65 MPa). The comparative characteristics of main process parameters with and without ceramic filter are represented. The experiments were carried out on a laboratory stand for complex purification of aqueous solutions by microfiltration, adsorption and reverse osmosis using the following process steps carried out in the respective apparatus.

scholarly journals Ultrasonic-Assisted Synthesis, Characterization, and Photocatalytic Application of SiO2@TiO2 Core-Shell Nanocomposite Particles

2019 ◽  
Vol 2019 ◽  
pp. 1-11 ◽  
Author(s):  
Newaz Mohammed Bahadur ◽  
Farhana Chowdhury ◽  
Md. Obaidullah ◽  
Md. Shahadat Hossain ◽  
Rumana Rashid ◽  
...  
Keyword(s):  
Zeta Potential ◽  
Metal Oxide ◽  
Uv Light ◽  
Water Solution ◽  
Ultrasound Irradiation ◽  
Blue Dye ◽  
Core Shell ◽  
Nanocomposite Particles ◽  
Ultrasonic Assisted ◽  
Shell Particles

In this study, we report the synthesis of SiO2@TiO2 core-shell nanocomposite particles by ultrasound irradiation of a mixture of dispersed SiO2 nanoparticles, titanium-tetra-n-butoxide (TBOT), and ammonia in an ethanol-water solution medium. The resulting core-shell nanocomposite particles were characterized by SEM, TEM, FT-IR, XPS, XRF, zeta potential measurements, XRD, and UV-visible spectroscopy. Results showed that TiO2 nanoparticles coated on the surface of SiO2 were 6–10 nm in size and retained an anatase crystalline phase. Zeta potential measurements confirmed that the surface property of the SiO2 changed after TiO2 coating. SiO2@TiO2 core-shell particles demonstrated better decolorization of methylene blue dye compared to commercial TiO2 in aqueous solution under UV light. After treatment, the catalysts were separated with low-speed centrifugation and successfully reused four times without loss of activity. This study may provide some inspiration for the synthesis of other metal oxide-metal oxide core-shell nanocomposite materials through ultrasound irradiation.

scholarly journals Quantum Dots Ceramic Nano Membrane for Copper Mining Water Treatment, Turning Na2SO4 to NaOH and Pretreatment for Seawater Desalination

2020 ◽  
Author(s):  
Zhiqiang Wang ◽  
Tian Cheng Wang
Keyword(s):  
Quantum Dots ◽  
Suspended Solid ◽  
Copper Mining ◽  
Ceramic Filters ◽  
Novel Technology ◽  
Flat Sheet ◽  
Uv Lamp ◽  
Mining Water ◽  
Waste Salt ◽  
Water Waste

<p><a></a><a>This paper </a>reports on performance of ceramic nanofiltration membrane to treat copper mining water, waste salt recycling and purification of seawater. The ceramic filters have α-Al<sub>2</sub>O<sub>3</sub> flat-sheet supporter, with sintered TiO<sub>2</sub>, Fe<sub>2</sub>O<sub>3</sub>, or ZrO<sub>2</sub>nanoparticles as membrane on the surface of supporter. The membrane has photoluminescence phenomenon when irradiating with UV lamp. It indicates that they are quantum dots material, whose sizes may be between 2-10nm. The Nanofilter can remove more 90% contaminants from copper mining water. It shows good functional stability in the corrosive mining water. It is also able to turn Na<sub>2</sub>SO<sub>4</sub> to NaOH by adding Ca(OH)<sub>2</sub>. This provides a novel technology to reuse waste salt. The ceramic nanofilter can remove all suspended solid from seawater to ease the subsequent desalination of seawater with reserve osmosis membrane. </p>

Sign in / Sign up

Export Citation Format

Share Document