Effect of solution pH on the dynamic of biosorption of Cr(VI) by living plants of Salvinia minima

Efficient removal of hexavalent chromium from water by an adsorption–reduction mechanism with sandwiched nanocomposites

“…The solution pH has been acknowledged as the most important factor governing metal adsorption onto the adsorbent. 26 To investigate the adsorption capacity of GMFP under both acidic and alkalic conditions, pH values from 2 to 12 at initial concentrations of 300 mg L À1 to evaluate the effect of pH on the Cr 6+ adsorption process. Solution pH affects both the surface charge of an adsorbent and the speciation of metal ions.…”

Valorization of raw biomaterial waste-date stones-for Cr (VI) adsorption in aqueous solution: Thermodynamics, kinetics and regeneration studies

“…(Araújo et al, 2013;Yang et al, 2014). The technique of adsorption adopted, is considered as promising and an interesting alternative to operate mainly using biomaterials (Gupta and Rastogi, 2009;Ponce et al, 2015). In recent years, immense research has been focused towards valorization of agricultural or industrial wastes for their uses in the water treatment consequently; this strategy reduces significantly the treatment cost and contributes to ecofriendly development.…”

Physico-chemical study of dew melon peel biochar for chromium attenuation from simulated and actual wastewaters

“…Cr(VI) and Cr(III) were measured using 1,5-diphenylcarbazide as described in the standard methods [38]. To Cr(III) determination, 1,5-diphenylcarbazide method was done in presence and absence of potassium permanganate (KMnO 4 ) as oxidant [39]. Cr(III) was estimated as the difference between Cr total [Cr(VI)+Cr(III)] (determined in presence of KMnO 4 ), and Cr(VI) (determined in absence of KMnO 4 ).…”