Truong, Nguyen, et al (2024) KHCO₃-activated high surface area 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 derived from brown algae: A case study for efficient adsorption of Cr(VI) in aqueous solution. Environmental Research. https://doi.org/10.1016/j.envres.2024.118227

Chromium contamination in water poses a significant threat to human health and ecosystems. This study focuses on developing a novel biochar from brown algae (Sargassum hemiphyllum) to capture and remove harmful hexavalent chromium (Cr(VI)) from water.

Traditional biochar, made from agricultural waste, can remove Cr(VI) but with limited capacity. This study introduces a new approach: activating algae biochar with potassium bicarbonate (KHCO3) to increase its surface area and pore size,enhancing Cr(VI) adsorption.

The KHCO3-activated biochar (KBAB-3) effectively adsorbed Cr(VI) across a range of concentrations (60-160mg/g). KBAB-3 remained highly efficient even after multiple cycles of use, proving its reusability and sustainability.

The study proposes a potential adsorption mechanism based on KBAB-3’s properties and Cr(VI) behavior. Further research will delve deeper into this mechanism.

This algae-based biochar offers a promising green solution for Cr(VI) removal from diverse water sources. Future studies will optimize KBAB-3 production and test its effectiveness in real-world wastewater treatment systems.

By harnessing the power of algae biochar, we can combat harmful chromium pollution and pave the way for cleaner, healthier water resources.