Wu, et al (2024) Cellulose-based mugwort biocharBiochar is a carbon-rich material created from biomass decomposition in low-oxygen conditions. It has important applications in environmental remediation, soil improvement, agriculture, carbon sequestration, energy storage, and sustainable materials, promoting efficiency and reducing waste in various contexts while addressing climate change challenges. More constructs p-n heterojunction micro interfaces to regulate the photocatalytic oxidation of As(III) by ferromanganese ions. Separation and Purification Technology. https://doi.org/10.1016/j.seppur.2024.129867

A new study explores the potential of mugwort straw biochar to remove arsenic (As(III)) from water. Researchers used mugwort, an abundant agricultural waste, and modified it into a biochar catalyst to improve arsenic oxidation. The key innovation in this research is the construction of p-n heterojunctions by loading the biochar with manganese oxyhydroxide (MnOOH) and iron oxyhydroxide (α-FeOOH). These modifications increase the biochar’s ability to generate active sites for photocatalytic reactions.

By delignifying the mugwort straw, the researchers exposed more hydroxyl groups, enhancing metal ion stability on the biochar’s surface. This treatment also increased the biochar’s porosityPorosity of biochar is a key factor in its effectiveness as a soil amendment and its ability to retain water and nutrients. Biochar’s porosity is influenced by feedstock type and pyrolysis temperature, and it plays a crucial role in microbial activity and overall soil health. Biochar More, further boosting its effectiveness in arsenic removal. Additionally, high-energy electron beam irradiation was used to enhance the photocatalytic properties of the modified biochar. The results showed that treated biochar could oxidize arsenic up to 12.31 times more efficiently than untreated biochar.

The study demonstrates how p-n heterojunctions facilitate the separation of charge carriers, enhancing the overall photocatalytic performance. This innovation offers an eco-friendly, low-cost solution for arsenic pollution in water. It also highlights the broader potential of using waste biomassBiomass is a complex biological organic or non-organic solid product derived from living or recently living organism and available naturally. Various types of wastes such as animal manure, waste paper, sludge and many industrial wastes are also treated as biomass because like natural biomass these More like mugwort straw to develop sustainable environmental technologies.

The findings contribute valuable insights into biochar’s potential for water remediation, emphasizing its role in addressing heavy metal contamination in aquatic systems.