I. Czinkota, T. Filep, G. Rétháti, L. Tolner, M. Gulyás, A. Sebok, Boglárka Dálnoki
{"title":"Derivation and application of a generalised exchange-adsorption isotherm for the adsorption of hydrophobic compounds on soils","authors":"I. Czinkota, T. Filep, G. Rétháti, L. Tolner, M. Gulyás, A. Sebok, Boglárka Dálnoki","doi":"10.17221/69/2020-SWR","DOIUrl":null,"url":null,"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.","PeriodicalId":48982,"journal":{"name":"Soil and Water Research","volume":" ","pages":""},"PeriodicalIF":1.7000,"publicationDate":"2020-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Soil and Water Research","FirstCategoryId":"97","ListUrlMain":"https://doi.org/10.17221/69/2020-SWR","RegionNum":4,"RegionCategory":"农林科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"SOIL SCIENCE","Score":null,"Total":0}
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.
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.