Comparative study of the uses of poly(4-vinylpyridine) and poly(diallyldimethylammonium) chloride for the removal of perchlorate from aqueous solution by polyelectrolyte-enhanced ultrafiltration

Polyelectrolytes with sulfonic acid groups useful in the synthesis and stabilization of Au and Ag nanoparticles

“…The polyelectrolytes have found uses in a wide number of technical applications. These include ultrafiltration, [1][2][3] paper-making, wastewater treatment, [4][5][6] food industry, [7][8][9] biomaterials, [10][11][12][13][14][15][16] fuel cells [17][18][19][20][21][22][23] and nanotechnology, [24][25][26][27] just to mention a few. In all these application, the ionic groups or the ionic exchange process of polyelectrolytes is very important.…”

Synthesis of Fe3O4@SiO2@MPS@P4VP nanoparticles for nitrate removal from aqueous solutions

“…As can be seen from this figure, before the introduction of positive charges onto the particles they were almost neutral (slightly positive with zeta potential of 6.2 mV). These slight positive charges can be attributed to the basic character of P4VP grafted to the magnetic particles . But by contacting @Si @P4VP particles with HCl (Figure ), the particles' charges increased significantly (zeta potential of 78 mV).…”

Preparation and characterization of functionalized poly(vinyl chloride) membranes for selective separation of perchlorate from water

“…The UF membrane modified with cationic surfactants also showed enhancement in perchlorate rejection from synthetic water due to the decrease in pore size of the membrane [30]. Roach et al [31,32] studied the removal of perchlorate from aqueous solution by a colloid-enhanced ultrafiltration (CEUF) method in the presence of poly(4-vinylpyridine) and poly(diallyldimethylammonium) chloride and reported greater than 95% of perchlorate (initial concentration of 10.3 ppm) removal in the presence of competition anions. Xie et al [33] studied the effect of chitosan on the separation of perchlorate using UF process and reported 92% perchlorate removal at pH 4.3 and initial perchlorate concentration of 10 mg/L.…”