Macauba palm (Acrocomia aculeata) cake from biodiesel processing: An efficient and low cost substrate for the adsorption of dyes

Comparison of Spirulina platensis microalgae and commercial activated carbon as adsorbents for the removal of Reactive Red 120 dye from aqueous effluents

“…It has been reported in the literature that different adsorption equilibrium constants (K) are obtained with different isotherm models [11,12,23,24,26,39,50,[58][59][60][61]. The thermodynamic parameters of adsorption can be estimated from K g (the Liu equilibrium constant), as previously reported in the literature [11,26].…”

Synthesis, characterization and adsorption properties of a novel biomagnetic composite for the removal of Congo red from aqueous medium

“…The adsorption of an anionic dye generally decreases with an increase in pH, and this phenomenon is associated not only with the negative charge on the surface of the adsorbent but also with excess OH − ions in the solution [34]. CR is an acidic dye and in the aqueous solution the acid dye is first dissolved and the sulfonate groups of the acid dye (Dye-SO 3 Na) are dissociated and converted to anionic dye ions at natural solution pH of 6.8:…”

Preparation of biomorphic Ni–Al LDHs using cotton from discarded T–shirt as a template and the adsorption capability for Congo red

“…Acid-treated pine cones 40.19 [38] Fe 3 O 4 @graphene nanocomposite 33.66 [54] Natural macauba palm cake 32.00 [55] Bentonite modified by acid and thermal activation 74.5 [56] Jujuba seeds 55.56 [57] Magnetite nanoparticles-loaded tea waste 82.64 [58] Mesoporous carbon-incorporated ZnO 162.0 [59] Biomorphic CLDH 119.9 This work Plots of lnq e as a function of e 2 gave straight lines. Values of q max (mg g -1 ) and b (mol 2 kJ -2 ), obtained from the intercepts and slopes of these straight lines, are given in Table 2.…”