Journal
ENVIRONMENTAL POLLUTANTS AND BIOAVAILABILITY
Volume 31, Issue 1, Pages 198-207Publisher
TAYLOR & FRANCIS LTD
DOI: 10.1080/26395940.2019.1607779
Keywords
Biochar; antibiotic; tetracycline; sorption; H2O2; rape stalk
Funding
- Natural Science Foundation of the Jiangsu Higher Education Institutions of China [18KJA610003, 17KJB610012]
- Science and Technology Plan Projects of Xuzhou City [KC18150]
- Opening Project of Jiangsu Key Laboratory of Vehicle Emissions Control [OVEC035]
- Natural Science Foundation of China [41807368, 31701566]
- Natural Science Foundation of Jiangsu Province [BK20170249]
- Xuzhou University of Technology [XKY2018136, XKY2017121, XKY2016121]
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To determine the sorption potential and mechanisms of tetracycline (TC) on pristine and H2O2-modified biochars, rape stalk biochars were produced and modified by H2O2. The specific surface area and pore volume of biochars increased with improving pyrolysis temperature, while the acidic groups decreased. Moreover, modified by H2O2, much more oxygen-containing functional groups were introduced. The results of sorption dynamics and isothermals tests showed that RB300 had the largest TC sorption capacity of 35.90 mg/g, which was ascribed to a plenty of non-carbonized organic matter and surface functional groups were retained. Modified by H2O2, the sorption of TC on biochars was enhanced which indicated the dominated sorption mechanisms were H-bonding and p-p electron donor acceptor interaction. The pH value would impact on sorption, and the maximum sorption capacity was obtained at pH = 9.0. Both cation concentration and type would affect the TC sorption.
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