The Characteristics of Phosphate Adsorption on Surface Sediments in Estuary
Abstract: The adsorption kinetics and thermodynamics of phosphate onto 3 typical surface sediments from the estuary of Li Cun River and the influencing of temperature and salinity on kinetics were inves-tigated. The adsorption kinetics process can be divided into 3 phase: fast adsorption stage (0 - 1 h), slow adsorption stage (1 - 12 h) and balance stage (>12 h). Increased salinity can inhibit phosphate adsorption and increased temperature promotes the adsorption. The reaction rate of the system speeded up and the balance time advanced when the temperature improved. Adsorption isothermal curve ofPO43--Pcorresponds with Langmuir isothermal adsorption equation. The critical concentrations of adsorption-desorption of the three sediments samples were: 0.034 mg∙L−1, 0.289 mg∙L−1 and 0.067 mg∙L−1.
文章引用: 刘书慧 , 张 健 , 郑西来 , 李 健 (2014) 河口感潮区表层沉积物PO43--P的吸附特征。 环境保护前沿， 4， 166-172. doi: 10.12677/AEP.2014.44023
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