Transport of Veterinary Antibiotics in Farmland Soil: Effects of Dissolved Organic Matter

Abstract

The application of manure as a fertiliser to farmland is regarded as a major source of veterinary antibiotic (VA) contamination in the environment. The frequent detection of such emerging contaminants and their potential adverse impacts on the ecosystem and human health have provoked increasing concern for VA transport and fate. Extrinsic dissolved organic matter (DOM) may be introduced into farmland soil along with Vas, and thus exert significant effects on the transport of VAs via hydrological processes upon rainfall. The leaching of VAs can be either enhanced or reduced by DOM, depending on the nature, mobility, and interactions of VAs with DOM of different origins. From the aspect of the diversity and reactivity of DOM, the state-of-the-art knowledge of DOM−VA interactions and their resulting effects on the sorption−desorption and leaching of VAs in farmland soil was reviewed. Spectroscopic techniques for examining the extent of binding and reactive components of DOM with VAs are summarized and their usefulness is highlighted. Models for simulating VA transport under the effects of DOM were also reviewed. It is suggested that distinct impacts of DOM of various organic fertiliser/amendment origins should be considered for predicting the transport of VAs in farmland soil.

Occurrence and Distribution of Antibiotics in the Water, Sediment, and Biota of Freshwater and Marine Environments: A Review

“…Many studies have also shown that the absorption of antibiotics into sediments is influenced by changes in the flow and volume of water and its physicochemical properties (e.g., water temperature and the pH of water and sediments) [ 69 ]. Based on previous studies, the mobility of antibiotics increases in the presence of dissolved organic carbon and colloidal matter [ 70 , 71 ]. Kafaei et al (2018), Zhao et al (2016), and Cheng et al (2016) have stated that the uptake of antibiotics by sediments is influenced by the pH and the contents of clay, silt, organic matter, and ionic matter of sediments [ 50 , 56 , 72 ].…”

Thermodynamic and Kinetic Investigation of the Adsorption and Desorption of Trimethoprim and Its Main Metabolites in Mediterranean Crop Soils

“…Among them, antibiotics are the PhACs that generate a major concern because of their continuous consumption and discharge into the sewer system, biological activity against living organisms, and the increase of antibiotic-resistant bacteria [ 1 ]. The presence of antibiotics in agricultural soil, not only from sludge and wastewater reuse but also from animal manure, has been described in several papers [ 2 , 3 , 4 ]. For example, antibiotics, such as fluoroquinolones, sulfonamides, macrolides, or tetracyclines, were measured in agricultural soils at concentrations up to the mg per kilogram level [ 3 , 5 , 6 , 7 , 8 ].…”

“…These metabolites are produced by demethylation of the parent compound (3-desmethyl-trimethoprim (DM-TMP), 65% of metabolized TMP, and 4-desmethyl-trimethoprim, 25% of metabolized TMP), and by its hydroxylation (4-hydroxy-trimethoprim (OH-TMP), 2% of metabolized TMP) [ 9 ]. These compounds could not only affect the soil organism but also contaminate surface water through runoff, groundwater by leaching, or even crops entering the food chain [ 2 , 10 ]. However, to date, there are no studies focused on the distribution and presence of these metabolites in soil, even though they may possess the same biological activity as the parent compound, or they could be present at higher concentrations or even more toxic than their parent compound [ 11 ].…”

Transport of oxytetracycline through saturated porous media: role of surface chemical heterogeneity

“…9,24,49,50 Furthermore, hydrophobicity is one of the important functional properties of natural organic matter affecting its interactions with antibiotics. 51,52 Particularly, the hydrophobicity fraction of natural organic matter was found to play a critical role in controlling the fate of organic contaminants including antibiotics in the environment. 51,52 That is, HA coating has the potential to alter the physicochemical characteristics of sand grain surfaces ( e.g.…”

“…51,52 Particularly, the hydrophobicity fraction of natural organic matter was found to play a critical role in controlling the fate of organic contaminants including antibiotics in the environment. 51,52 That is, HA coating has the potential to alter the physicochemical characteristics of sand grain surfaces (e.g., enhanced the hydrophobicity of the sand surface). 28,53,54 Thus, hydrophobic interaction also contributed the interaction between OTC and HA molecules.…”