期刊
CHEMOSPHERE
卷 235, 期 -, 页码 136-142出版社
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.chemosphere.2019.06.091
关键词
Biochar; Tylosin; Copper; Adsorption; Nano-hydroxyapatite
资金
- China Postdoctoral Science Foundation [2018M631485]
- Beijing Science and Technology Commission Foundation [Z181100005318002]
Antibiotics and heavy metals are frequently detected simultaneously in water environment. Effective elimination methods for antibiotics and heavy metals pollution should deserve our attention. This study investigates the adsorption performance of biochar modified with nano-hydroxyapatite (nHAP) on tylosin (TYL) and Cu from water simultaneously. Composite adsorbents of nHAP and biomass, derived from three waste residues, which were wood-processing residues (WR), wheat straw (WS) and Chinese medicine residues (CMR), were prepared. According to the results of orthogonal experiment, the degree of influence of the three factors on TYL and Cu were the pyrolysis temperature > the proportion of nHAP and biomass > the sources of biomass, and pyrolysis temperature> the sources of biomass> the proportion of nHAP and biomass, respectively. The optimum conditions for nHAP@biochar were screened. At pH < 7.0, the adsorption quality of TYL increased with pH increased, while at pH > 7.0, the adsorption quality of TYL changed slightly. At low pH, Cu and TYL could compete for the same adsorption sites on nHAP@biochars. The adsorption amount of TYL and Cu were both increased with increasing of the temperature. Compared with Langmuir model, Freundlich model could better fit the TYL adsorption on nHAP@biochars, with K-f values of TYL 62.35 (mmol/kg) (L/mmol)(n) (WR1) and 4.84 (mmol/kg) (L/mmol)(n) (CMR1), respectively. (C) 2019 Elsevier Ltd. All rights reserved.
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