Testing of water treatment copolymers for compatibility with polyamide reverse osmosis membranes

Abstract

Cationic polymers used in traditional water , followed by anionic polymers , and finally nonionic polymers . Although PCA of the FTIR spectra did detect differences in polymer-exposed membranes vs. a control, no discernable difference in RO membrane performance was observed. Therefore, under the conditions studied, the issue of "membrane poisoning " caused by organic polymer absorption onto polyamide membranes was minimal.

Color removal from simulated dye water and actual textile wastewater using a composite coagulant prepared by ployferric chloride and polydimethyldiallylammonium chloride

“…Therefore, research on novel coagulants has been particularly active in recent years [10]. Among these studies, the use of inorganic coagulants and organic coagulants together was proved to be effective to treat water and wastewater [11].…”

Evaluation of the geotechnical properties of alum sludge, zeolite, and their mixtures for beneficial usage

“…WTSs are composed of materials removed from raw water and the products of chemical coagulation that have been added to the raw water. Their characteristics and compositions are highly variable depending on the characteristics of the water being treated, the type and amount of the coagulant used, and the dewatering method [5,10,12,27,[66][67][68][69]. Therefore, the observed differences in the behaviors of the AS investigated in this study and the ones reported in the literature could be attributed to the variability of the various parameters stated above.…”

“…Their characteristics and compositions are highly variable depending on the characteristics of the water being treated, the type and amount of the coagulant used, and the dewatering method [5,10,12,27,[66][67][68][69]. Their characteristics and compositions are highly variable depending on the characteristics of the water being treated, the type and amount of the coagulant used, and the dewatering method [5,10,12,27,[66][67][68][69].…”

Bench-Scale and Pilot-Scale Treatment Technologies for the Removal of Total Dissolved Solids from Coal Mine Water: A Review

“…Hollow fibers have an extremely high packing density, leading to high permeate production rates, but also generate more fouling than other filtration methods that utilize lower fluxes (Günther et al 2012;Yoon et al 2004). The functional groups introduced into the polymer structure of the membrane control the membrane charge, valence, and strength, while the dissolved species adsorption degree is determined by membrane hydrophobicity, charge, and membrane surface morphology (Gabelich et al 2005;ITRC 2010;Mondal and Wickramasinghe 2008). Separation efficiency depends on solute concentration, applied pressure, water flux rate, and other operational parameters in addition to membrane and feed water properties because of the influence of diffusion (ITRC 2010).…”