Title: Occurrence, composition and risk assessment of antibiotics in soils from Kenya, Africa
Authors: Yuyi Yang, Anita Awino Owino, Yan Gao, Xue Yan, Chen Xu, Jun Wang*
Affiliations: 1. Key Laboratory of Aquatic Botany and Watershed Ecology, Wuhan Botanical Garden, Chinese Academy of Sciences, Wuhan 430074, China
2. Sino-Africa Joint Research Center, Chinese Academy of Sciences, Wuhan 430074, China
3. University of Chinese Academy of Sciences, Beijing 100049, China
4. Wuhan Environmental Protection Bureau, Wuhan 430022, China
Year: 2016
Journal: Ecotoxicology
Link: https://link.springer.com/article/10.1007%2Fs10646-016-1673-3
Abstract: Antibiotics can accumulate in soils via different ways, which may pose serious threat to ecological environment of soil and quality of agricultural products. In this study, the occurrence of 12 antibiotics including four sulfonamides (SAs), four tetracyclines (TETs) and four fluoroquinolones (FQs) was investigated in soils from four sampling sites of Kenya (Mai Mahiu, Narok, Mount Suswa Conservancy, and Juja), Africa. The soils in suburban area of Narok had the highest average concentrations of total 12 antibiotics with an average value of 43.64 μg kg-1 dw (dry weight), followed by Mai Mahiu (26.70 μg kg-1 dw), Juja (24.41 μg kg-1 dw) and Mount Suswa Conservancy (12.21 μg kg-1 dw). Sulfamethoxazole, sulfamethazine, oxytetracycline, and enrofloxacin were identified as the main antibiotics polluted in soils. Total organic carbon may influence the distribution of SAs in Narok and FQs in Juja. Ecological risk analysis based on the risk quotient showed that SAs detected in soils have higher risk compared to TETs and FQs.
