Abstract-Diatomaceous earth itself has a large specific surface area, porous structured, large aperture and uniform, modest, stable skeleton structure of hole wall, easy to modify, high adsorption capacity, good thermal stability, mechanical stability and water, etc. Make it will benefit the adsorption of heavy metal ions, but single diatomite adsorbing heavy metal ions adsorption rate is not high, this article with manganese oxide modified diatomite, used for adsorption of Cd2+, with a series of characterization methods analyze adsorption principle..Provide a theoretical study for the adsorption of heavy metal ions principle
Abstract-Toxic heavy metals in water have been a serious hazard human beings health and eco-environment. However, these heavy metals are usually important natural resources. How separate them from polluted water and reuse them, which is a hot issue in environmental protection field. Adsorption is widely used in the removal of heavy metal ions from Wastewater due to stable, reliable, simple, low energy consumption, low secondary pollution, recycling. Selective adsorption is preparing corresponding adsorbing materials or setting certain solution conditions, according to the different characteristics of heavy metals, such as electronegativity, degree of confusion and ion bound state, so as to separate heavy metal ions from wastewater. Selective adsorption has outstanding advantages in the separation and recovery of heavy metals. Research progress in selective adsorption of heavy metals in recent years is summarized. And the research progress of ion exchange resin and ion imprinted material in selective adsorption of heavy metals is Focused on.
This study attempted to improve the adsorption performance of diatomite for the removal of lead (II) ions from wastewaters through modification with Calcium carbonate. The removal of lead (II) ions from aqueous solution was studied using Calcium carbonate modified samples at different condition, including adsorbent dosage, pH and initial concentration of lead (II) ions. Calcium carbonate modified diatomite adsorption isotherms and adsorption kinetics were also studied. The adsorption isotherms and the kinetic data are best-fit with the Langmuir model and pseudo-second-order kinetics, respectively. Our results show that these Calcium carbonate modified diatomite exhibit significant adsorption activities for lead (II) ions in aqueous solutions.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.
hi@scite.ai
10624 S. Eastern Ave., Ste. A-614
Henderson, NV 89052, USA
Copyright © 2024 scite LLC. All rights reserved.
Made with 💙 for researchers
Part of the Research Solutions Family.