Kinetic modelling of cadmium removal from wet phosphoric acid by precipitation method

Surface modification of spent coffee grounds using phosphoric acid for enhancement of methylene blue adsorption from aqueous solution

“…Therefore, the interaction between PSCG and MB is performed as a monolayer adsorption that attaches to the biosorbent surface, with the main adsorption as hypothesized by the Langmuir model. Similar findings have been mentioned in several previous studies (Zielinśki et al 2019;Zhuang et al 2020;Choi et al 2021;Zhang et al 2021). However, R 2 of both the Freundlich and Langmuir models was found to be higher than 0.9 (Table 3), so the adsorption of MB using PSCG can be explained as monolayer and multilayer adsorption, applying to both models.…”

Cadmium Removal from Cadmium‐Containing Apatites by Ion‐Exchange Reactions

“…Several techniques have been studied to extract cadmium from phosphoric acid: liquid-liquid extraction with different solvents, precipitation, adsorption, and others. [13][14][15][16][17][18][19][20][21][22][23][24] In addition to thermal methods, hydrometallurgical methods of cadmium extraction from phosphate ore have been studied. Most of the studies found in the literature recommend the use of organic extractants or acidic substances in high concentrations to extract cadmium from the phosphate matrix, but often these studies overlook an important point, which is the phosphate losses generated by these extraction agents, which, despite their effectiveness, limit their use.…”

“…On a lower scale (laboratory or pilot), several studies have been carried out on the decadmiation of phosphoric acid, phosphates, and fertilizers. Several techniques have been studied to extract cadmium from phosphoric acid: liquid‐liquid extraction with different solvents, precipitation, adsorption, and others [13–24] . In addition to thermal methods, hydrometallurgical methods of cadmium extraction from phosphate ore have been studied.…”