1. Effects of copper and aluminum on the adsorption of sulfathiazole and tylosin on peat and soil
- Author
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Lingyun Li, Baoyuan Guo, Zhiguo Pei, Xiao-quan Shan, Chunmei Li, Shuzhen Zhang, Shuang Yang, and Bei Wen
- Subjects
Peat ,Health, Toxicology and Mutagenesis ,Diffusion ,Equilibration method ,Inorganic chemistry ,chemistry.chemical_element ,Tylosin ,Toxicology ,chemistry.chemical_compound ,Soil ,Adsorption ,Sulfathiazole ,Aluminium ,medicine ,Soil Pollutants ,Sulfathiazoles ,General Medicine ,Pollution ,Copper ,chemistry ,Models, Chemical ,medicine.drug ,Aluminum - Abstract
Effects of copper (Cu) and aluminum (Al) on the adsorption of sulfathiazole (STZ) and tylosin (T) to peat and soil were investigated using a batch equilibration method. Results show that Cu suppressed STZ adsorption onto peat and soil at pH 5.0 because of the electrostatic competition, while increased STZ adsorption at pH 5.0 due to the formation of STZ-Cu complexes and/or Cu bridge. In contrast, Al only decreased STZ adsorption at pH 6.0, and exerted slight effect on STZ adsorption at6.0. As for T, both Cu and Al suppressed its adsorption over the entire pH range owing to three reasons: 1) electrostatic competition between Cu/Al and T(+); 2) Cu/Al adsorption made the soil and peat surface less negatively charged, which was unfavorable for T(+) adsorption; 3) the shrunken pore size of peat and soil retarded the diffusion of large-sized T into these pores.
- Published
- 2013