Simultaneous removal of Cr(Ⅵ) and tetracycline from wastewater by dielectric barrier discharge plasma coupled with TiO/rGO/CuO composites: Performance and mechanism.

In this study, dielectric barrier discharge (DBD) plasma combined with titanium dioxide/reduced graphene oxide/copper oxide (TiO/rGO/CuO) composites for simultaneous removal of hexavalent chromium (Cr(Ⅵ)) and tetracycline (TC) from wastewater were explored systematically. The TiO/rGO/CuO composites were successfully prepared to improve the specific surface area and charge carrier separation rate. When Cr(Ⅵ) and TC coexist, the two pollutants have better removal efficiency without changing the initial pH.

Extraction of Germanium from Low-Grade Germanium-Bearing Lignite by Reductive Volatilization.

Germanium (Ge) as an important strategic metal is widely used in many modern-technology fields such as optical fiber and thermal solar cells. In this study, the volatilization behavior of Ge from low-grade germanium-bearing lignite was investigated in detail through reductive volatilization. The results indicated that temperature and air flow rate in the semi-closed roasting system played a significant role in the process.

Understanding of TiO catalysis mechanism in underwater pulsed discharge system: Charge carrier generation and interfacial charge-transfer processes.

Compared with traditional photocatalysis system, TiO charge carrier generation and interfacial charge-transfer process may be influenced by various chemical and physical effects in underwater pulsed discharge plasma system. Here, the role of high-energy electron, ozone in TiO charge carrier generation and transfer process has been investigated using phenol as the probe molecule. The introduction of electron-trapping agent (KHPO) have an inhibiting effect on TiO catalytic activity, indicating high-energy electrons played a significant role in TiO catalytic process.