Journal
BIORESOURCE TECHNOLOGY
Volume 297, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.biortech.2019.122381
Keywords
Tetracycline; Aerobic granular sludge; Biochar; Modification
Funding
- National Key Research and Development Program of China [2018YFD0800105]
- Open Project of State Key Laboratory of Urban Water Resource and Environment, Harbin Institute of Technology [QA201819]
- Heilongjiang Provincial Key Laboratory of Soil Protection and Remediation
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In this study, biochar derived from aerobic granular sludge was modified by ZnCl2 (Zn-BC) to improve the adsorption performance of tetracycline (TC). The surface area, pores, and functional groups of Zn-BC were characterized by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area, Fourier transform infrared (FTIR) spectroscopy and X-ray diffraction (XRD) and the effects of initial pH, TC concentration, and temperature on TC adsorption performance were analyzed. At the same time, the adsorption kinetics, isotherms, thermodynamics and diffusion models were studied. The results showed that the BET surface area and micropore volume of Zn-BC were 852.41 m(2).g(-1) and 0.086 cm(3).g(-1), respectively. The maximum adsorption performance of TC was 93.44 mg.g(-1), and it was less influenced by pH. The adsorption of TC on Zn-BC agreed well with the pseudo-second-order model and the Langmuir isotherm. The thermodynamic parameters indicated that the adsorption process was a spontaneously endothermic reaction.
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