Full text
| |
| Author(s): |
Leandro Alves Pereira
Total Authors: 1
|
| Document type: | Doctoral Thesis |
| Press: | Campinas, SP. |
| Institution: | Universidade Estadual de Campinas (UNICAMP). Instituto de Química |
| Defense date: | 2014-07-08 |
| Examining board members: |
Susanne Rath;
Ricardo Mathias Orlando;
Sonia Claudia do Nascimento de Queiroz;
José Roberto Guimarães;
Anne Hélène Fostier
|
| Advisor: | Susanne Rath |
| Abstract | |
Sorption and dissipation of veterinary drugs in Brazilian soils The animal production on large-scale is dependent on the use of veterinary drugs (VD) for therapeutic and prophylactic purposes. Due to its low absorption a large amount of these substances is excreted via faeces and urine of treated animals. Thus, VD can be sorbed in soils or leached through the field to watercourses. Due to the potential risks offered to microorganisms in the soil and water, to plants and the possibility of spread of resistant bacteria, consumption of VD has become a public health issue. Under this scenario this study evaluated the sorption of danofloxacin (DANO), oxytetracycline (OTC) and ivermectin (IVM) in two characteristics soils of the State of São Paulo, named Neossolo Quartzarênico (N1, sandy soil) and Argissolo Vermelho-Amarelo (S2, clay soil), according to the OECD 106 guidelines.The studies indicated increased soil sorption capacity following to the order: OTC, IVM < DANO. In none of the cases irreversible sorption of the species was observed. For the antiparasitic drug IVM, which is widely employed for the control of endo- and ecto-parasites, soil column leaching and aerobic degradation studies were carried out according to OECD 312 and OECD 307 guidelines, respectively. IVM was leached to a depth of 18 cm of soil columns and concentrated from 0 to 12 cm in soil N1 and from 0 to 6 cm in soil S2. Under the conditions of temperature and humidity adopted (19 °C and 78.3%, respectively) the dissipation was faster in the clay soil S2 (DT50 = 11.5 days) in comparison to the sandy soil N1 (DT50 = 15.47 days) (AU) | |
| FAPESP's process: | 10/06488-7 - Determination and kinetic studies of veterinary drugs in Brazilian soils |
| Grantee: | Leandro Alves Pereira |
| Support Opportunities: | Scholarships in Brazil - Doctorate |