A5075933098- Membrane Separation Technologies
- Membrane-based Ion Separation Techniques
- Advanced oxidation water treatment
- Advanced battery technologies research
- Water Treatment and Disinfection
- Electrocatalysts for Energy Conversion
- Electrochemical Analysis and Applications
- Fuel Cells and Related Materials
- Advanced Battery Materials and Technologies
- Bacterial biofilms and quorum sensing
- Environmental remediation with nanomaterials
- Nanoparticles: synthesis and applications
- Advancements in Battery Materials
- Extraction and Separation Processes
- Antimicrobial agents and applications
- Nanopore and Nanochannel Transport Studies
- Water Quality Monitoring and Analysis
- Advanced Photocatalysis Techniques
- Pharmaceutical and Antibiotic Environmental Impacts
- Microplastics and Plastic Pollution
- TiO2 Photocatalysis and Solar Cells
- Supercapacitor Materials and Fabrication
- Arsenic contamination and mitigation
- Analytical Chemistry and Sensors
- Analytical chemistry methods development
Seoul National University
2016-2025
Ewha Womans University
2003-2024
Korea Environment Institute
2019-2022
Government of the Republic of Korea
2014-2021
Seoul Institute
2018-2021
Daegu Gyeongbuk Institute of Science and Technology
2016
University of Seoul
2014
Gyeongsang National University
2011
Korea Advanced Institute of Science and Technology
2011
University of California, Berkeley
2008
Capacitive deionization (CDI) is a promising technology for water desalination that has seen tremendous advances over the past five years.
Zero-valent iron nanoparticles (nano-Fe0) in aqueous solution rapidly inactivated Escherichia coli. A strong bactericidal effect of nano-Fe0 was found under deaerated conditions, with a linear correlation between log inactivation and dose (0.82 inactivation/mg/L nano-Fe0·h). The E. coli air saturation required much higher doses due to the corrosion surface oxidation by dissolved oxygen. Significant physical disruption cell membranes observed exposed nano-Fe0, which may have caused or...
Based on a porous carbon electrode, capacitive deionization (CDI) is promising desalination technology in which ions are harvested and stored an electrical double layer.
Fishing ions: this review provides a comprehensive analysis of different approaches in utilizing capacitive deionization (CDI) for selective ion separations and removal.
Polyamide reverse osmosis (RO) membranes with carbon nanotubes (CNTs) are prepared by interfacial polymerization using trimesoyl chloride (TMC) solutions in n-hexane and aqueous of m-phenylenediamine (MPD) containing functionalized CNTs. The CNTs the reactions pristine acid mixture (sulfuric nitric 3:1 volume ratio) varying amounts acid, reaction temperature, time. an optimized condition found to be well-dispersed polyamide layer, which is confirmed from atomic force microscopy, scanning...
A novel concept to evaluate desalination performance in capacitive deionization (CDI) is proposed called the CDI Ragone plot.
The demand for fresh water has been increasing, caused by the growing population and industrialization throughout world. In this study, we report a capacitive-based desalination system using Prussian blue materials in rocking chair battery, which is composed of sodium nickel hexacyanoferrate (NaNiHCF) iron HCF (NaFeHCF) electrodes. system, ions are removed not only charging steps but also discharging steps, it possible to treat actual seawater with because material high charge capacity...
Various forms of carbon nanotubes have been utilized in water treatment applications. The unique characteristics nanotubes, however, not fully exploited for such Here we exploit the and corresponding attributes to develop a millimetre-thick ultrafiltration membrane that can provide permeability approaches 30,000 l m−2 h−1 bar−1, compared with best 2,400 bar−1 reported nanotube membranes. developed consists only vertically aligned walls 6-nm-wide inner pores 7-nm-wide outer form between when...
Lignin nanoparticles of uniform, small quasi-spherical shape with a relatively high BET surface area (nearly 92 m<sup>2</sup>g<sup>−1</sup>) were synthesized using facile, one pot technology compressed CO<sub>2</sub>antisolvent.
We investigated the stoichiometry, kinetics, and mechanism of arsenite [As(III)] oxidation by ferrate [Fe(VI)] performed arsenic removal tests using Fe(VI) as both an oxidant a coagulant. As(III) was oxidized to As(V) (arsenate) Fe(VI), with stoichiometry 3:2 [As(III):Fe(VI)]. Kinetic studies showed that reaction first-order respect reactants, its observed second-order rate constant at 25 degrees C decreased nonlinearly from (3.54 +/- 0.24) x 10(5) (1.23 0.01) 10(3) M(-1) s(-1) increase pH...
The ability of ferrate (Fe(VI)) to oxidize phenolic endocrine-disrupting chemicals (EDCs) and phenols during water treatment was examined by determining the apparent second-order rate constants (kapp) for reaction Fe(VI) with selected environmentally relevant EDCs (17α-ethinylestradiol, β-estradiol, bisphenol A) 10 substituted at pH values ranging from 6 11. three groups showed appreciable reactivity (kapp 7 ranged 6.4 × 102 7.7 M-1 s-1). kapp studied 6.6 3.6 103 s-1, indicating that many...
Electrochemical disinfection has emerged as one of the most promising alternatives to conventional water in many applications. Although mechanism electrochemical been largely attributed action electro-generated active chlorine, role other oxidants, such reactive oxygen species (ROS) •OH, O3, H2O2, and •O2- remains unclear. In this study, we examined ROS using a boron-doped diamond (BDD) electrode chloride-free phosphate buffer medium, order avoid any confusion caused by generation chlorine....
The oxidation of N-nitrosodimethylamine (NDMA) precursors during water treatment was investigated using ozone and chlorine dioxide (ClO2). Second-order rate constants for the reactions model NDMA (dimethylamine (DMA) 7 tertiary amines) with (kapp at pH = 2.4 × 10-1 to 2.3 109 M-1 s-1), ClO2 6.7 10-3 3.0 107 hydroxyl radical (•OH) 6.2 1.4 1010 s-1) were determined, which showed that selected precursors, exception dimethylformamide (DMFA) can be completely transformed via their direct reaction...
A highly active heterogeneous Fenton catalyst was fabricated by impregnating iron oxide nanoparticles in alumina coated mesoporous SBA-15 silica.
Abstract Fenton reaction has been often used to treat industrial wastewater or landfill leachate. However, most mechanistic research into the confined low concentration conditions (usually of iron is less than 1 mM). These are removed from circumstances real application. This especially true in treatment leachate Korea. Therefore, we investigated characteristics system using high concentrations (mostly [Fe2+] = approximately 10 mM, [H2O2] 5 [Organic (t-BuOH methanol)] 0 30 mM) and...