Sorptive removal of color from aqueous coffee and tea infusions

Adsorptive Removal of Ciprofloxacin from Aqueous Media with Graphene based Composites

“…The GO dose of 0.5 , 1 , 2 and 3 g/L with removal efficiencies of 22%, 33%, 50% and 61% respectively. This drastic increase in the CIP removal from 10% to 50% with 2 g/L concentration of TiO2 and GO can be conveniently attributed the specific surface area of the sorbents [32][33]. GO has high specific surface area when compared to TiO2 and this enabled higher sorptive removal of CIP.…”

“…The adsorption phenomena is assumed to be a pseudo-chemical reaction. The pseudo-first-order plots are based on the equation ( 2) and pseudo-second-order kinetic plots on equation (3) [33].…”

“…The sorption of CIP can happen due to bulk diffusion, pore diffusion or capillary diffusion [33]. The rate limiting factor of adsorption process can be determined by the intraparticle diffusion model evaluated using equation (4) proposed by Morris and Weber (1963).…”

Colour removal from beet molasses by ultrafiltration with activated charcoal

“…The linear regression coefficients (r) and values for the slope (v) and intercept (%Do) are also summarized in Table 2. A comparison of experiments [4][5][6][7][8][9][10][11] shows that v is mainly affected by the feed pH, with values close to 1 h -1 (from 0.60 to 1.44 h -1 ) for systems with pH 3, whereas %Do depends on the pH, initial NPAC and TMP. This result confirms that, in experiments at pH 3, %D increases with increasing %Do, reaching a maximum value of 95.80 ± 0.02% at a TMP of 100 kPa and initial NPAC concentration of 5 g/L.…”

“…Removal of the dark colour compounds can be highly profitable in order to avoid changes to the composition and colour of beet molasses during storage and use [1,3,7]. above 300 °C is usually used in thermal method [15] and water [11,18,19], sodium hydroxide solutions [19,20] or various alcohols [18,19] as desorption agents in chemical methods.…”