Abstract:
:In this work, tetracycline (TC) adsorption and desorption were studied, and the soil properties that most influenced the process were identified. Batch experiments were carried out on 63 crop soil samples, which showed a wide range of values in their physicochemical characteristics. Adsorption curves fit well to the Freundlich equation, with KF values varying between 901 and 9202 Ln μmol1-n kg-1. Kd values ranged between 53 and 6899 L kg-1 for an initial concentration (Co) of 400 μM, whereas the adsorption capacity (qa) ranged from 8541 to 14,852 μmol kg-1. TC retention on soils was high, with adsorption values always higher than 58%, and desorption values lower than 9%. Bivariate correlations and multiple linear regressions were performed to identify those soil variables having a greater influence on TC adsorption and desorption. The results indicate that organic carbon, clay, exchangeable aluminum, available phosphorus, effective cation exchange capacity content, and pH are the main characteristics affecting TC adsorption and desorption. The models, developed by means of multiple linear regression, gave satisfactory and robust predictions for TC adsorption and desorption, using easily determinable soil characteristics as input.
journal_name
Environ Resjournal_title
Environmental researchauthors
Conde-Cid M,Fernández-Calviño D,Nóvoa-Muñoz JC,Núñez-Delgado A,Fernández-Sanjurjo MJ,Arias-Estévez M,Álvarez-Rodríguez Edoi
10.1016/j.envres.2019.108607subject
Has Abstractpub_date
2019-10-01 00:00:00pages
108607eissn
0013-9351issn
1096-0953pii
S0013-9351(19)30404-9journal_volume
177pub_type
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