Research Papers by Jaeweon Cho

• We compare drinking water treatment systems, a NF unit and a conventional treatment. • Sustainable water quality improvement using renewable energy is demonstrated. • Membranes are more efficient than conventional treatment removing micropollutants. • Membranes reject hydrophobic compounds causing

The main purpose of this study is to evaluate a combined ozone and microfiltration (MF) membrane process as pre-treatment of a seawater reverse osmosis (SWRO) system. During the filtration of seawater (SW) with the MF membranes, membrane fouling on both hydrophilic (PHI) and hydrophobic (PHO) MF mem

The removal of arsenic by a commercial nanofiltration membrane was evaluated with respect to the performance and mechanism. The important membrane properties governing the separation of arsenic, such as molecular weight cut-off (MWCO), electrokinetic charge and individual salts rejection characteris

We developed a real-time aerosolization method combined with membrane filtration technique to determine size and number of dissolved and suspended colloid nanoparticles in water. Feed water before and after being treated by MF, UF or NF membranes was in-situ aerosolized and dried, and size and numbe

Measurements of contact angle, zeta potential, and pore size distribution for clean, cationic surfactant coated, and organic fouled membranes, were conducted to obtain membranes properties, from perspectives of organic fouling mitigation. Interaction between natural organic matter (NOM) and the memb

A silica membrane was fabricated using the aerosol flame deposition (AFD) method under different sintering temperatures. It was characterized, in terms of roughness, pure water permeability, contact angle, zeta potential, and effective pore size distribution. Membrane performance was evaluated with

Organic matter dissolved in seawater should be analyzed carefully since organic fouling is one of the main reasons for low performances of seawater reverse osmosis (SWRO) processes. Because of various ionic constitutions with high concentrations in seawater, the seawater organic matter analysis is d

Suspended particles and dissolved solids in seawater during desalination process have been known to cause colloidal fouling in membranes. The membrane filtration-differential mobility analyzer (MF-DMA) counting technique has been developed to quantify suspended nanoparticles and dissolved solids in

Biofouling potential on NF membranes was investigated in terms of bacterial by-products (BBP) characterizations (e.g., effective diffusivity, zeta potential, and toxicity) and their transport phenomenon. Here, BBP were defined as organic matters derived from microorganisms, such as cell debris, solu

The transmission and toxicity of metals and metalloids were initially investigated with various nanofiltration (NF) and seawater reverse osmosis (SWRO) membranes, under oxic condition, using wastewater effluent and seawater samples. Various metals and metalloids were categorized into three groups ac