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首页> 外文期刊>Chemical Science International Journal >Contribution to the Study of Phosphorus Adsorption Kinetics on the Superficial Sediments of a Recently Development Artificial Estuary: Vridi Channel (C?te d'Ivoire)
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Contribution to the Study of Phosphorus Adsorption Kinetics on the Superficial Sediments of a Recently Development Artificial Estuary: Vridi Channel (C?te d'Ivoire)

机译：对最近开发人工口浅表沉积物对磷吸附动力学研究的贡献：Vridi通道（C？TE D'IVOIRE）

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The aim of this study is to characterize phosphates adsorption kinetics on the superficial sediments of Vridi channel from its new hydromorphology. So, three scenarios have been carried out taking account the different waters seasons of this estuary by using pH and temperature as relevant parameters. In the first scenario, the experiments carried out at pH = 8 and T = 20°C to simulate phosphates adsorption on these sediments in its great cold season. In the second, the experiments carried out at pH = 8 and T = 25° C to simulate phosphates adsorption on these substrates in its hot season and small cold season. In the third, the experiments carried out at pH = 7 and T = 30°C to simulate phosphates adsorption on these sediments in its flood season. The experiences were carried out according to US EPA/530/SW-87/006-F protocol. KH_(2)PO_(4) solutions were used as phosphates synthetic solutions. The experimental data were modeling by Lagergeen kinetics model (pseudo-order 1), Blanchard kinetics model (pseudo-order 2), Elovich kinetics model, Weber and Morris kinetics model and, external diffusion kinetics model. The results have showed phosphates adsorption on these sediments increase in the experiments carried out at pH = 8 and T = 20°C to those carried out at pH = 7 and T = 30°C. All experimental data have been well modeling by Blanchard kinetics model. So, these phosphates adsorption kinetics are pseudo-order 2 and the chemisorption is the dominant mechanism. The results obtained by the experimental data modeling by Weber and Morris kinetics model and external diffusion kinetics model showed that this process is not limiting by the molecular diffusion process. The experimental data have been again well modeling by Elovich kinetics model. That has confirmed the chemisorption character of this adsorption, and showed this chemisorption is activated.
机译：本研究的目的是从其新的水形式学对Vridi通道浅表沉积物的磷酸盐吸附动力学。因此，通过使用pH和温度作为相关参数，进行了三种情景考虑了本河口的不同水域季节。在第一场景中，在pH = 8和T = 20℃下进行的实验，以在其寒冷的季节中模拟这些沉积物上的磷脂吸附。在第二中，在pH = 8和T = 25℃下进行的实验在其炎热的季节和小寒冷季节中模拟这些基材上的磷酸盐吸附。在第三，在pH = 7和T = 30℃下进行的实验，以模拟磷酸盐对这些沉积物的吸附。根据美国EPA / 530 / SW-87/006-F协议进行经验。 KH_（2）PO_（4）溶液用作磷酸盐合成溶液。实验数据通过Lagergeen动力学模型（伪订单1），Blanchard动力学模型（伪订单2），Elovich动力学模型，Weber和Morris动力学模型以及外部扩散动力学模型进行建模。结果表明磷酸盐对这些沉积物的吸附在pH = 8和T = 20℃下在pH = 7和T = 30℃下进行的实验增加。所有实验数据都是Blanchard动力学模型的良好建模。因此，这些磷酸盐吸附动力学是伪阶2，化学吸附是优势机制。通过韦伯和莫里斯动力学模型和外部扩散动力学模型的实验数据建模获得的结果表明该过程不受分子扩散过程的限制。实验数据再次通过Elovich动力学模型进行了良好的建模。这已经证实了这种吸附的化学吸附性，并且显示出该化学吸附。

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