Sorption of Sulfachloropyridazine in Brazilian Soils

Tetracycline and Sulfonamide Antibiotics in Soils: Presence, Fate and Environmental Risks

“…Data provided by Conde-Cid et al [90,93] indicate that K d(des) ranged between 1.6 and 29.3 L kg −1 (average 6.5) for SDZ, between 3.2 and 133.9 L kg −1 (average 13.5) for SMT, and between 5.3 and 65.4 L kg −1 (average 10.9) for SCP, while the K F(des) values ranged between 0.1 and 36.8 L n µmol 1−n kg −1 (average 6.4) for SDZ, between 4.3 and 117.6 L n µmol 1−n kg −1 (average of 15.7) for SMT, and between 5.2 and 73.7 L n µmol 1−n kg −1 (average of 12.1) for SCP (Table 8). These values are very similar to those obtained by other authors, both for the desorption of SDZ [68,84,107,108], of SMT [109], and of SCP [70]. Furthermore, the scores reported by Conde-Cid et al [90,93] for the desorption parameters (K d(des) and K F(des) ) are considerably higher than those obtained for the adsorption parameters (K d(ads) and K F(ads) ), indicating the presence of positive hysteresis, confirmed by the HI parameter, with values higher than 1 in many cases (Table 8), which means that part of the adsorbed antibiotic was retained in the soil after a desorption cycle [110], in accordance with what was observed by other authors who also studied the adsorption and desorption process of SAs in soils [68,70,108,111].…”

“…Similarly, Vieira et al [70] found for their soils that the K F(ads) parameter was positively correlated with the OC and clay contents, as well as with eCEC and negatively correlated with the sand content. Finally, Doretto and Rath [108] studied soils in which the K F(ads) parameter for SDZ was positively and significantly correlated with the OC and clay contents, and significantly and negatively correlated with the sand content.…”

“…The adsorption curves described for sulfonamides are C type, which is indicative of a constant distribution of antibiotics between the soil and the solution, suggesting that the adsorption of sulfonamides is independent of their concentration. Due to the linear nature of the curves, they are satisfactorily described by the K d parameter, and also by the Freundlich's K F parameter, as indicated by numerous authors for SDZ [84,85], for SMT [86][87][88], and for SCP [65,70,87,89].…”

“…The properties of the soils with the greatest influence on the adsorption and desorption process of SAs are the organic matter content (specifically organic carbon -OC-and N contents), texture (specifically sand and clay proportions), and variables related to the exchange complex, such as eCEC, Mg e , Al e , Na e , and K e . This has been highlighted by different authors [67,70,84,90,93,94,108,125,126]. For example, Leal et al [67] studied the adsorption of 5 sulfonamides (including SDZ, SMT, and SCP) in 13 acid soils of Brazil and found that the parameter K d(ads) was positively and significantly correlated with eCEC, and with OC and clay contents, while it was negatively correlated with the sand content of the soils, in the same way as that reported by Conde-Cid et al [90,93].…”

Sorption and mobility of thiabendazole in a Brazilian Oxisol

“…Several studies have described the antimicrobial and antiparasitic behaviour of TBZ in the soil (RATH et al, 2016;DORETTO et al 2014;DIONISIO;VIEIRA et al 2017). The sorption of TBZ has been investigated using four different soils commonly found in São Paulo State (OLIVEIRA NETO et al 2017).…”