Environmental sensitive hydrogel for purification of waste water: part 1: synthesis and characterization

Magnetic hydrogel for better adsorption of heavy metals from aqueous solutions

“…The higher adsorption 78 characteristics were reported as a result of copolymerisation 79 AA and MA. 80 In the present work we had copolymerised the AMPS with AA [28]. and the same procedure was adopted for PAAAM/PAMPS Table 1 shows the composition of PAAAM/PAMPS hydrogel.…”

“…Among these, adsorption is 26 the best studied method. Adsorbents such as carbon nanotubes 27 [5], clay [6], starch [7] and cellulose [8] are widely used for this 28 purpose. Polymeric hydrogels are the best adsorbent for the 29 removal of heavy metals due to its cost effectiveness, smartness 30 and high water absorption capacity.…”

Alternative Route to Synthesize a Biophenolic Resin From Tannin and Kraft Black Liquor and Its Application as an Adsorbent Material

“…Duas principais variedades de soro podem ser obtidas de acordo com o método de precipitação da caseína utilizado. O soro ácido (pH < 5) resulta da precipitação ácida no pH isoelétrico da caseína (4,6), e o soro doce (pH 6 -7) é obtido pela precipitação por meio de enzimas proteolíticas (quimosina) (AQUARONE et al, 2001). De maneira geral, o soro ácido apresenta maior teor de cinzas e menor teor de proteínas, de modo que seu uso na alimentação é mais limitado devido ao sabor ácido e conteúdo salino (SISO, 1996).…”

Synthesis, Characterization and Swelling study of Poly (Methacrylic acid-co-Maleic acid) Hydrogels

“…Beyond pH 6.7, the swelling ratio of hydrogels decreases. Souda P. et al, (2014) had explained that there is a competition between the shielding effect of the carboxylate and the screening effect of the counter ions 19 . At the pH value of 3, carboxylic groups display hydrophobic character because of their low ionization; therefore the polymer with more carboxylic groups swells less 25 .…”