... example, 23% of Cd was adsorbed at 15 min, while 32%, 37%, and 55% of Cd was adsorbed at reaction times of 24 h, days, and Fig Percent Cd adsorption by the phosphate-treated goethite () and untreated ... effectively release Cd from the goethite particle surface and prevent readsorption of Cd (Farrah and Pickering, 1978) In the present work, we focused on the samples with nearly 100% Cd adsorption; in ... in the presence of phosphate, indicative of enhanced Cd adsorption The adsorption of Cd did not reach equilibrium after weeks of reaction in the absence of phosphate; however, for the 670 K Wang,...