Nanofiltration

The performance of nanofiltration (NF) with the addition of poly (acrylic acid) (PAA) for treatment of strontiumbearing nuclear wastewater was investigated using different NF membranes at various pH levels and PAA/Sr ratios. Greater Sr removal at elevated pH was attributed to the formation of SrCO3(

One of the major drawbacks for the introduction of membrane technology is the possible occurrence of fouling. Especially in newer processes such as nanofiltration, understanding of the mechanisms of flux decline and fouling is limited. Water fluxes obtained with nanofiltration of pure water are usua

We present a comparative study of the filtration performance of one ceramic and two organic nanofilters. The results of a detailed experimental and theoretical investigation of the rejection of single salts (NaCl, NaNO3, and CaCl2) and multi-electrolyte mixtures (NaCl/CaCl2/HCl and NaNO3/NaCl/CaCl2)

Titania (TiO2) membranes with molecular weight cut-offs controlled at 250, 400, and 2000 were successfully prepared by the sol-gel process. These porous membranes rejected electrolytes based on Donnan exclusion, and the permeate volume flux, based on the electroviscous effect, was pH-dependent, simi

An important challenge for nanofiltration processes is the development of predictive models that convey a fundamental understanding and simple quantification of the governing phenomena in a way that has the potential for industrial application. The paper reviews one such approach, including: the for

In the dairy industry non-accidental losses of milk or dairy products to sewer amount to 1–3% of the total milk processed. These significantly contribute to the 0.5–6.0 g COD/L of end-of-pipe waste-water. The major part of this polluting charge originates from starting, interrupting, and stopping da

For more than 2 years, the extension of the Méry-sur-Oise plant has been producing water from the river Oise, using nanofiltration technology for a production capacity of 140,000 m3/d, a world premiere on surface water. After presenting the reasons for the nanofiltration choice and the treatment pro

Measurements of the rejection of perchlorate anion (ClO4–) were performed using nanofiltration (NF) and ultrafiltration (UF) membranes. Aqueous solutions of perchlorate (at a concentration of 100 µg/L of ClO4– by “spiking” with KClO4) were fed to the membrane test apparatus. Solutions contained only

Nanofiltration (NF) membrane technology has made rapid progress and then extended its application fields. It has obtained in particular the good results in the removal of organic and inorganic matters or microbes in the water and wastewater. To investigate the applicability and characteristics of NF

Endocrine disrupting compounds can affect hormone systems in organisms. However, conventional wastewater treatment plants are not able to remove these substances sufficiently before disposing effluent into the environment. Membrane technology, which is proving to be an effective barrier to these sub