Enhanced TOC removal from paper mill wastewater using air dielectric barrier discharge plasma with persulfate sources: Mechanistic insights and continuous flow operation performance evaluation.

This study investigates the removal of total organic carbon (TOC) from paper mill wastewater using air dielectric barrier discharge (DBD) plasma, combined with various persulfate sources, namely potassium peroxymonosulfate (PMS), potassium peroxydisulfate (PDS), and sodium persulfate (SPS). Mechanistic insights into the activation of plasma-PDS and -PMS were obtained through quenching experiments and electron spin resonance (ESR) techniques. The addition of persulfate to air DBD plasma increased TOC removal kinetics by approximately 1.

Checklist of the Odonata (Insecta) of Sundaland and Wallacea (Malaysia, Singapore, Brunei, Indonesia and Timor Leste).

A checklist, based on a database containing published data, of the Odonata (dragonflies and damselflies) occurring in Sundaland and Wallacea is presented. The presence of (sub)species is indicated for eight main regions (Singapore & Peninsular Malaysia, South China Sea (islands in the South China Sea that are not sensibly treated as satellites of larger landmasses), Borneo, Sumatra, Java & Bali, Lesser Sunda, Sulawesi, Moluccas), 22 subregions and 80 smaller islands and island groups. In total 743 full species are recorded from the entire area with 549 species known from Sundaland and 270 from Wallacea.

Mg/Si- and Ag-Doped Carbon-Based Media Rainwater Filtration System for Multiple Pollutants Removal.

In this study, the removal performances of a multi-pollutant elimination cartridge system (MPECS) composed of palm shell waste-based activated carbon (PSAC), magnesium (Mg)/silicon (Si)-doped PSAC (Mg/Si-PSAC), and silver (Ag)-doped PSAC (Ag-PSAC) for heavy metals, organic pollutants, and were investigated. Mg/Si impregnation significantly improved heavy metal removal using PSAC by increasing the surface area and adding more sorption sites to the magnesium silicate nanolayer. Fixed-bed column experiments showed that the MPECS column outperformed PSAC and commercial activated carbon (DJAC), with a 1.