No abstract available

[en] The application of particle track membranes in medicine and biology has been performed. The membrane properties needed for particular use (e.g. dialysis, bacteria and virus filtration, microflora study) have been listed. The mechanical properties of the membrane foils as well as their radiation resistance have been described. 13 refs, 9 figs, 2 tabs

[en] In this work, the effects of various operating parameters (pressure, pH, BPA concentration, and filtration time) toward bisphenol A (BPA) removal via ultrafiltration (UF) membrane system were investigated using response surface methodology (RSM). Historical data design of RSM was used to obtain the interaction between variables and response as well as optimizing the process. The analysis of variance (ANOVA) showed that the third-order polynomial model was significant in which pH and filtration time were identified as significant terms that influence BPA removal. The 3D response surface plots revealed the two-factor interaction between independent and dependent variables. The optimization process of the model predicted optimum conditions of 99.61% BPA removal at 1 bar, pH 6.7, 10 μg/L BPA concentration, and 10-min filtration time. The predicted optimum conditions for BPA removal were consistent with the obtained experimental values, indicating reliable application of historical data design RSM for modeling BPA removal in UF membrane system.

[en] Triple-membrane water treatment systems are comprised of ultrafiltration units for pretreatment, electrodialysis reversal primary demineralizers, reverse osmosis secondary demineralizers, portable ion exchange unit polishing demineralizers, and ultraviolet sterilizers. The triple-membrane process is designed to provide an unprecedented degree of pretreatment to maximize efficiency, durability and reliability of the reverse osmosis, whilst reducing the required regeneration frequency of the ion exchange demineralizer by one to two orders of magnitude. (author)

[en] Short communication

[en] Research and development of ultrafiltration membrane and ultrafiltration sets developed at SINR are summarized. Specifications of several types of ultrafiltration sets, such as the pressurized tube module, plate and frame module, and spiral wound module, are introduced. And their applications in biochemistry, pharmacy and environmental protection are also reviewed

No abstract available

[en] The conceptual Supercritical Water Reactor (SCWR) uses supercritical water as the working fluid. SCWRs are designed for operating at high pressures and temperatures in order to achieve a higher thermal efficiency of about 45% vs. about 33% for Light Water Reactors (LWRs). It is expected that methods for purifying the corrosion products from SCW are required, including ultrafiltration of corrosion products particulates. We have now undertaken some experiments to test the stability of several filter membranes at high pressures and temperatures for application in the potential GEN-IV plant. A SCW flow set-up has been built. Initial microscopic analysis of the membranes has been performed and the results of this work are presented here. (author)

[en] This study asks two questions: (1) How appropriate is the use of a basic filtration equation to the application of ultrafiltration of mixed waste, and (2) How appropriate are non-parametric models for permeate rates (volumes)? To answer these questions, mechanistic and non-mechanistic approaches are developed for permeate rates and volumes associated with an ultrafiltration/mixed waste system in dia-filtration mode. The mechanistic approach is based on a filtration equation which states that t/V vs. V is a linear relationship. The coefficients associated with this linear regression are composed of physical/chemical parameters of the system and based the mass balance equation associated with the membrane and associated developing cake layer. For several sets of data, a high correlation is shown that supports the assertion that t/V vs. V is a linear relationship. It is also shown that non-mechanistic approaches, i.e., the use of regression models to are not appropriate. One models considered is Q(p) = a*ln(Cb)+b. Regression models are inappropriate because the scale-up from a bench scale (pilot scale) study to full-scale for permeate rates (volumes) is not simply the ratio of the two membrane surface areas. (authors)

[en] The characteristics of track filtration membranes has been performed. The investigation of radiation resistance has been carried out for different types of polymer foil used as a membrane material. Biomedical applications of track filtration membranes have been presented and discussed. 10 refs, 10 figs