Journal
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING
Volume 3, Issue 1, Pages 162-169Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.jece.2014.11.012
Keywords
Biochar; Sorption; Ceftiofur; Florfenicol; HPLC-UV
Categories
Funding
- Agricultural Research Center
- Agricultural Animal Health Program at Washington State University (WSU)
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The goal of this project was to determine if biochar can be used to sequester antibiotic residues in the environment. Slurries of different biochars (n = 27) and water were evaluated for their capacity to adsorb two relatively hydrophilic veterinary antibiotics, florfenicol and ceftiofur. Freely available antibiotic was quantified using HPLC-UV and a bioassay. Biochars prepared at higher pyrolysis temperatures (>500 degrees C) adsorbed the antibiotics with greater efficiency compared with lower preparation temperatures (P<0.005). Florfenicol was adsorbed (<99.9%) by six different biochars while ceftiofur was adsorbed by these and nine additional biochars (>99.98% and > 99.9%, respectively). Florfenicol was sorbed by four biochars (>99.94%) in the presence of soil; however, the sorption performance decreased for two biochars when calf urine and feces were added with the soil. The effect of the biochar proportions on florfenicol sorption in soil-urine-feces slurries were tested with two distinct pinewood biochars, yielding Freundlich sorption coefficients of 2160 and 312 L kg(-1). Pinewood biochar and potentially other types of biochar are excellent candidates for sequestering antibiotic residues in soil-urine-feces environments. (C) 2014 Elsevier Ltd. All rights reserved.
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