Đánh giá khả năng xử lý chất kháng sinh Tetracycline trong nước bằng than hoạt tính điều chế từ bã cà phê

Abstract

Tetracycline (TC), a broad-spectrum antibiotic, is commonly used in aquaculture and livestock farming. After entering water sources, it poses a significant threat to the environment and human health. This study presents a method for preparing activated carbon (AC) from waste coffee sludge using hydrothermal carbonization (HTC) and evaluates its capacity for TC antibiotic adsorption. The material characterization results indicated that the activation process with KOH significantly improved the carbon structure. Specifically, the specific surface area of the material increased from 23.06 m2/g (for hydrochar, HC) to 976.34 m2/g (for activated carbon, AC). Batch adsorption experiments demonstrated the high efficiency of AC in removing TC. The adsorption process was most effective in an acidic environment with an optimal pH of 3, achieving a TC removal efficiency of nearly 92% with an AC dosage of 1.5 g/L. This research demonstrates that waste coffee sludge is a promising, low-cost raw material for producing high-performance activated carbon, offering a sustainable solution for treating antibiotic pollution in the aquatic environment.