A Mechanism Assessment and Differences of Cadmium Adsorption on Raw and Alkali-Modified Agricultural Waste

In this study, raw corn silk was considered for the removal of cadmium ions from aqueous solutions. order to improve adsorption characteristics, KOH treatment applied as a route obtain modified materials. Both materials before and after metal were characterized by pHPZC, SEM-EDX FTIR analysis. SEM images spectra revealed that alkali modification caused some structural changes could properties investigated material. The experimental results ion-exchange study biosorption process on predominantly mechanism, followed chemisorption. kinetic parameters implied there are three stages in process. addition, both is very fast pseudo-second-order model. fitted two parameter isotherm models, while Sips model best describes According model, maximum capacity adsorbed 49.06 mg g?1, which 2.23 times greater comparison material (21.96 g?1). Furthermore, mechanisms onto summarized better understand influence silk. examine reusability material, diluted nitric acid used regeneration. A desorption performed adsorption-desorption cycles. high efficiency (?85%) indicated MCS Cd can be efficiently recovered reused new cycle.