Antimony (Sb) contamination in water is a growing environmental concern. A recent study in Separations from Nan, et al investigated a sustainable approach to address this issue by using magnetic 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 aquatic plants. Researchers explored the adsorption properties and mechanisms of biochar made from Arundo donax, Typha angustifolia, and Eichhornia crassipes, with a focus on removing Sb from water efficiently.

The study highlighted the superior performance of magnetic biochar derived from Arundo donax (LMBC). This material demonstrated a 97% removal efficiency under optimal conditions (300°C pyrolysisPyrolysis is a thermochemical process that converts waste biomass into bio-char, bio-oil, and pyro-gas. It offers significant advantages in waste valorization, turning low-value materials into economically valuable resources. Its versatility allows for tailored products based on operational conditions, presenting itself as a cost-effective and efficient More temperature, 100 mg dosage, and pHpH is a measure of how acidic or alkaline a substance is. A pH of 7 is neutral, while lower pH values indicate acidity and higher values indicate alkalinity. Biochars are normally alkaline and can influence soil pH, often increasing it, which can be beneficial More 8). The adsorption kinetics conformed to a pseudo-second-order model, indicating a chemical interaction mechanism. Isotherm studies showed LMBC exhibited multilayer adsorption, with a maximum Sb adsorption capacity of 26.07 mg/g.

Magnetic modification enhanced LMBC’s surface area (89.14 m²/g) and pore volume, improving its adsorption capabilities. Characterization techniques, including SEM, BET, and XPS, confirmed the presence of Fe oxides and functional groups like hydroxyl and carboxyl, which played a key role in Sb adsorption. The material’s superparamagnetic properties also facilitated easy recovery and reuse.

This research emphasizes the potential of LMBC for treating Sb pollution in water, particularly during sudden contamination events. By leveraging waste from aquatic plants, it also supports sustainable waste management and environmental protection.

SOURCE: Nan, et al (2024) Application of Magnetic Aquatic Plant Biochar for Efficient Removal of Antimony from Water: Adsorption Properties and Mechanism. Separations. https://doi.org/10.3390/separations12010002