Sorption kinetics of chlortetracyline and tylosin on sandy loam and heavy clay soils

被引:38
作者
Allaire, S. E. [1 ]
Del Castillo, J.
Juneau, V.
机构
[1] Univ Laval, Ctr Rech Hort Envirotron, Ste Foy, PQ G1K 7P4, Canada
[2] Univ Montreal, Ecole Med Vet, Dept Biomed Vet, Montreal, PQ G2S 7C6, Canada
关键词
D O I
10.2134/jeq2005.0355
中图分类号
X [环境科学、安全科学];
学科分类号
08 ; 0830 ;
摘要
Antibiotics may appear in the environment when manure, sewage sludge, and other organic amendments are added to soils. There is concern that the presence of antibiotics in soils may lead to the development of antibiotic-resistant bacteria which may spread to the rest of the environment. This paper aims at evaluating the sorption kinetics of two antibiotics frequently used in pig production. The results indicate that sorption of chlortetracycline (CTC) and tylosin (TYL) in sandy loam and clay occurs very fast. More than 95% of the CTC adsorption is completed within 10 min on both soils and of TYL within 3 h. These results suggest that 24-h soil and antibiotic solution mixtures is enough for sorption studies. Also, there is less likelihood that these antibiotics will leach through soil and appear in the ground water since their sorption on soils is very high unless they are carried by soil particles through preferential flow. There was also no effect of soil sterilization on sorption kinetics of these antibiotics thus suggesting that there is minimal probability of the antibiotics degrading by microorganisms during 24- to 48-h adsorption studies.
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收藏
页码:969 / 972
页数:4
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