期刊
ECOTOXICOLOGY AND ENVIRONMENTAL SAFETY
卷 149, 期 -, 页码 80-87出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ecoenv.2017.11.027
关键词
Enteromorpha prolifera; Biochar; Adsorption; Polycyclic aromatic hydrocarbons
资金
- Natural Science Foundation of Shandong Province, China [ZR2014EEM016]
- Natural Science Foundation of China [51579228]
EP-biochar was produced from Enteromorpha prolifera (EP) at temperatures of 200-600 degrees C under limited-oxygen conditions and then activated using HCl and HF. To optimize the sorption of pyrene (PYR) and benzo[a]pyrene (BaP), the effect of the pyrolysis temperature was studied, and the results showed that EP-biochar produced at 500 degrees C gave the highest removal efficiency. The physiochemical properties of EP-biochar pyrolyzed at 500 degrees C were characterized. The examination indicated that the surface area of EP-biochar was 205.32 m(2)/g. The effect of the EP-biochar dosage and initial solution pH on the adsorption were studied in batch adsorption experiments. Kinetic studies indicated that the adsorption processes of PYR and BaP agreed well with a pseudo second-order kinetic model. The sorption equilibrium data were well described by the Langmuir model. Desorption experiments were conducted to test the strength of binding interactions of EP-biochar. The results showed that PYR and BaP were difficult to dissolve in water after adsorption. Regeneration experiments demonstrated that the bio-chars regenerated at 200 degrees C retained approximately 48% and 40% of their initial PYR and BaP uptake.
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