Adsorption Behavior of Phosphate from Water on Zirconium-loaded Granular Zeolite-amended Sediment

In this study, a zirconium-loaded granular zeolite (ZrGZ) was prepared, characterized and used as a sediment amendment to control internal phosphorus (P) loading in water samples from a heavily polluted river. The adsorption characteristics of phosphate on ZrGZ-amended sediment were investigated usi...

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Bibliographic Details
Published inHuanjing kexue Vol. 39; no. 10; p. 4565
Main Authors Liang, Shu-Jing, Lin, Jian-Wei, Zhan, Yan-Hui, Wang, Zhen-Hua, Li, Ya-Ling, He, Si-Qi, Chen, Hai-Yang, Tang, Feng-Xia, Li, Zhi-Qiang
Format Journal Article
LanguageChinese
Published China 08.10.2018
Subjects
amended sediment
phosphate
phosphorus fractionation
zirconium-loaded granular zeolite
adsorption characteristics
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Summary:In this study, a zirconium-loaded granular zeolite (ZrGZ) was prepared, characterized and used as a sediment amendment to control internal phosphorus (P) loading in water samples from a heavily polluted river. The adsorption characteristics of phosphate on ZrGZ-amended sediment were investigated using batch experiments, and the stability of P in phosphate-adsorbed ZrGZ was evaluated using a sequential chemical extraction method. Results showed that the Langmuir isotherm model was more suitable for describing the equilibrium adsorption data of phosphate on ZrGZ-amended sediment than the Freundlich and Dubinin-Radushkevich isotherm models. The adsorption process of phosphate on ZrGZ-amended sediment could be well described by the pseudo-second-order and Elovich kinetic models, and both film and intra-particle diffusion controlled the adsorption rate during the gradual adsorption stage. The coexistence of SO and HCO inhibited the adsorption of phosphate on ZrGZ-amended sediment, while coexisting Na , K , Mg and
ISSN:0250-3301
DOI:10.13227/j.hjkx.201801110