Innovative Biochar Catalyst Efficiently Purifies Water Contaminated with Antibiotics

A novel boron and nitrogen co-doped sludge #biochar efficiently activates peroxymonosulfate for rapid degradation of #sulfamethoxazole in water, achieving a 92.1% removal rate in 60 minutes. This catalyst shows high resistance to pH variations and other contaminants, offering sustainable antibiotic contamination solutions.

June 22, 2024

1–2 minutes

Wang, et al (2024) Boron and nitrogen hydrothermal co-doped sludge 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 towards efficiently activate peroxymonosulfate for sulfamethoxazole degradation. *Journal of Cleaner Production.* https://doi.org/10.1016/j.jclepro.2024.142843

A recent study published in the Journal of Cleaner Production details the development of a novel catalyst designed to address water contamination by antibiotics, specifically sulfamethoxazole (SMX). Researchers synthesized a boron and nitrogen co-doped sludge biochar (BNSBC) through a one-pot hydrothermal process. This biochar exhibits a high capability for activating peroxymonosulfate (PMS), resulting in a rapid degradation of SMX in water, achieving a 92.1% removal rate within 60 minutes.

The study highlights the synergistic effects of boron and nitrogen in enhancing the physical and chemical properties of the biochar. The presence of various active sites, such as graphitic-N and pyridinic N, plays a crucial role in the activation of PMS and the subsequent degradation of SMX. The BNSBC/PMS system demonstrated high resistance to 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 variations and co-existing contaminants, ensuring effective purification across different water conditions.

Characterization techniques, including quenching and electrochemical tests, identified non-radicals and electron transfer processes as key contributors to SMX degradation. The proposed degradation pathways, supported by density functional theory calculations, indicate a significant reduction in toxicity of the intermediates compared to SMX.

Moreover, the BNSBC/PMS system showed promising results in degrading other antibiotics, such as sulfadiazine and ciprofloxacin, indicating its broad-spectrum potential. This innovative approach not only offers a robust solution for antibiotic contamination in water but also presents a sustainable method for sludge disposal, addressing environmental concerns related to sludge management. The study underscores the potential of BNSBC/PMS systems for practical applications in wastewater treatment, providing an effective and environmentally friendly solution to a pressing global issue.