Organic pollutants removal by phosphoric acid modified biochar from residue of Inonotus obliquus
JOURNAL OF ENVIRONMENTAL CHEMICAL ENGINEERING(2023)
摘要
Herbal medicine is used widely, and the residues increase rapidly. Biochar preparation from the residues is a potential way to treat wastes with wastes. Inonotus obliquus (IO) is a natural porous fungus and is famous for its hypoglycemic effect. The residues of Inonotus obliquus (IOR) are potential raw materials for biochar because of their porous structure. P-IORBC and Zn-IORBC, activated by H3PO4 and ZnCl2 respectively, were prepared from IOR. The distinct properties of P-IORBC and Zn-IORBC were shown in the study. P-IORBC was optimized by response surface method (RSM), and the optimized parameters of P-IORBC preparation were 166 min (pyrolysis time), 374 degrees C (pyrolysis temperature), and 3.91 (the mass ratio of H3PO4 to IOR). The actual methylene blue (MB) adsorption (951.56 mg/g) was near the predicted value (971.00 mg/g), indicating the reliability of the response surface model. Zn-IORBC has a larger pore volume and pore size, while P-IORBC has a larger specific surface area. The specific surface areas of Zn-IORBC and P-IORBC were 1676.78 and 2014.51 m2/g, respectively. Compared to Zn-IORBC, the pyrolysis temperature of P-IORBC was reduced from 547 degrees C to 374 degrees C. The tetracycline (TC) adsorption for P-IORBC and Zn-IORBC was 1515.46 mg/g and 1033.66 mg/g. P-IORBC was more effective at the adsorption of cationic dyes than Zn-IORBC. In general, P-IORBC had more potential due to its high yield and environmentally friendly characteristics. The data provides a reference for biochar preparation from residues of herbal medicine.
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关键词
Biochar,Adsorption,Optimization,Inonotus obliquus
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