Derivation and application of a generalised exchange-adsorption isotherm for the adsorption of hydrophobic compounds on soils

IF 1.7 4区农林科学 Q4 SOIL SCIENCE

Soil and Water Research Pub Date : 2020-10-05 DOI:10.17221/69/2020-SWR

I. Czinkota, T. Filep, G. Rétháti, L. Tolner, M. Gulyás, A. Sebok, Boglárka Dálnoki

引用次数: 1

Abstract

A general adsorption model able to provide a good description of the multilayer adsorption of ions and molecular compounds under any circumstances is proposed in this paper. In order to reach this goal, a general form of isotherm was deduced based on the Gapon equation and classical isotherm forms. The adsorption of molecular compounds with diverse hydrophobicity and acid-base characteristics were investigated and validated with a new model for the adsorption of four pesticides on different soils. The adsorption capacity and adsorption energy estimated by the new model were found to be related to the organic matter content of the soil. Great differences were found in the isotherm parameters (Ai, Ki, and ni) among both the soils and compounds investigated here.

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疏水性化合物在土壤上吸附的广义交换吸附等温线的推导与应用

本文提出了一个通用的吸附模型，该模型能够很好地描述离子和分子化合物在任何情况下的多层吸附。为了达到这一目的，在Gapon方程和经典等温线形式的基础上，推导了等温线的一般形式。利用一个新的四种农药在不同土壤上的吸附模型，研究并验证了具有不同疏水性和酸碱性的分子化合物的吸附。新模型估算的吸附容量和吸附能与土壤有机质含量有关。本文研究的土壤和化合物的等温线参数（Ai、Ki和ni）存在很大差异。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Soil and Water Research Water resources, Soil Science, Agriculture-WATER RESOURCES

CiteScore

4.60

自引率

0.00%

发文量

审稿时长

>12 weeks

期刊介绍： An international peer-reviewed journal published under the auspices of the Czech Academy of Agricultural Sciences and financed by the Ministry of Agriculture of the Czech Republic. Published since 2006. Thematic: original papers, short communications and critical reviews from all fields of science and engineering related to soil and water and their interactions in natural and man-modified landscapes, with a particular focus on agricultural land use. The fields encompassed include, but are not limited to, the basic and applied soil science, soil hydrology, irrigation and drainage of lands, hydrology, management and revitalisation of small water streams and small water reservoirs, including fishponds, soil erosion research and control, drought and flood control, wetland restoration and protection, surface and ground water protection in therms of their quantity and quality.