Application of a new adsorbent for fluoride removal from aqueous solutions

Rapid and efficient removal of fluoride ions from aqueous solution using a polypyrrole coated hydrous tin oxide nanocomposite

“…This increase can be attributed to the rise in the number of active sites available for adsorption as adsorbent dose increases [12]. After that, beyond an adsorbent dosage of 0.1 g, there was no substantial increase in the percentage removal even when the dosages were appreciably increased up to 0.2 g. This observation can be ascribed to the fact that at very high dosages, adsorption sites become saturated due to overlapping causing a reduction in active sites available for adsorption and eventually no further increase in percentage removal efficiency occurs [43,44]. Therefore, 0.1 g was chosen as the adsorbent dosage for further adsorption studies.…”

“…Values of 1/n usually range from 0 to 1, where closer to zero means more surface heterogeneity [47] and n in between 1 and 10 indicate beneficial adsorption [43]. Fig.…”

Potential of cobalt ferrite nanoparticles (CoFe2O4) for remediation of hexavalent chromium from synthetic and printing press wastewater

“…C e is the Cr(VI) concentration at equilibrium(mgL -1 ) and q e is the adsorbed amount of Cr(VI) ions. For calculation of isotherm parameters, a trial and error procedure was applied by using the solver add-in with Microsoft"s spreadsheet in Microsoft Excel 2010 [36]. Nonlinear isotherm plot for Langmuir and Freundlich at 298, 318 and 328K is shown in (Fig.…”

Removal of Fluoride From Shatt Al-Arab Drinking Water Using a Novel Low Cost Material

“…There are various knowledge were developed to decreased fluoride (F-) content in water, such as thickening and electrodialysis (Srivastava et al, 2013;, membrane operation and electrodialysis (Arda and Orhan, 2009;Dominguez and Charbit, 2005;Sunil, 2013; electrochemical treatments (Mokashi and Parlikar, 2013;Maallemi, et al, 2008;Erguna and Tora, 2008), ion-exchange and its variation (Ruxi and Hong, 2002;and Grames, 2002), moreover, the adsorption technique is the actual method for eliminating fluoride from drinking water . Recently, most of researcher targeted on fluoride (F-) removal using normal, biomass component and synthetic material such, fly ash (Piekos and Palawanska, 1999), activated alumina (Ghorai, and K., 2005), chitosan drops (Labhsetwar, et al, 2010) and red sludge (Ranjeeta and Shikha, 2013), The last study for fluoride removal has been used low cost materiel of bone char for fluoride removal (Sorlina, 2011).…”