Platanus orientalis L. leaves residue-derived biochar: investigating the effects of synthesis temperature

There is a lot of controversy surrounding biochar at the moment because of its conflicting impacts on the environment. This means that a deeper insight into their characteristics must be gained. Within this study, Platanus orientalis L. (POL) leaf biomass was utilized as the feedstock for producing biochar (POLBC) via pyrolysis at three distinct temperatures: 500, 550, and 600 °C. Using a number of methods of analysis as X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), Brunauer–Emmett–Teller (BET), Barrett-Joyner-Halenda (BJH), adsorption–desorption isotherm and yield, pH, the Potential difference caused by biochar dispersion at neutral pH (PDBD) measurements, the impact of pyrolysis temperature on the chemical and physical properties of the synthesized biochars was investigated. Furthermore, thermogravimetric analysis (TGA) and differential thermal analysis (DTA) were conducted on the feedstock, while field emission scanning electron microscopy (FE-SEM), energy dispersive spectroscopy (EDS), elemental mapping, and pH point of zero charge (pH_pzc) analyses were performed on the optimized biochar (POLBC550). According to the results of this research, while the pyrolysis temperature rises, yield decreases while pH and PDBD of the biochar increase. The EDS analysis indicates that the O/C atomic ratio for POLBC550 was 0.32. Additionally, the TGA analysis indicates a weight loss of 89.3% in the feedstock at 700 °C.

Graphical abstract