Author:
Thi Thom Nguyen,Thi Mai Thanh Dinh,Thi Nam Pham,Thu Phuong Nguyen,Buess-Herman Claudine
Abstract
Abstract
Pollution of heavy metals in water can affect the health of humans and the environment; therefore, removal of heavy metal ions is getting the attention of scientists. To reduce the negative impact of heavy metals on human health and the environment, Cd2+ ions present in water were treated using hydroxyapatite (HAp) as adsorbent. The effects of contact time, initial Cd2+ concentration, solution pH, and adsorbent mass on the adsorption capacity and efficiency of HAp were investigated. Cd2+ uptake was quantitatively evaluated using Langmuir and Freundlich adsorption isotherms. The maximum monolayer adsorption capacity was 119 mg/g. The experimental adsorption data were analyzed using three kinetic models: Lagergren’s pseudo-first-order law, McKay and Ho’s pseudo-second-order law, and the intra-particle diffusion model. The results showed that the Cd2+ removal process follows the pseudo-second-order law.
Subject
Health, Toxicology and Mutagenesis,Industrial and Manufacturing Engineering,Fuel Technology,Renewable Energy, Sustainability and the Environment,General Chemical Engineering,Environmental Chemistry
Cited by
17 articles.
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