Cost-Effective and Ecologically Sustainable Carbon Nano-Onions for Antibiotic Removal from Wastewater

Abstract

The discharge of antibiotics into the aquatic environment can become toxic and hazardous to both human health and the environment. Therefore, it is enormously essential to remove multiple antibiotics from the wastewater. In this work, carbon nano-onions (CNOs) were synthesized and used as effective adsorbents for the removal of 97% norfloxacin (NOR) and 99% tetracycline hydrochloride (TCH) antibiotics from wastewater. CNOs showed good adsorption efficiency, and the equilibrium period was also short. The adsorption studies were investigated with adsorbent dosages, adsorbate concentration, and pH. The maximum adsorption capacity (q max) was found to be 416.66 and 344.82 mg g–1 for TCH and NOR, respectively. CNOs have also shown admirable removal efficiency toward NOR and TCH from natural water samples such as dam water (97% TCH and 94% NOR), tap water (96% NOR and 93% TCH), and lake water (95% NOR and 93% TCH).

Green synthesis of a disordered N-doped carbonaceous aerogel from waste for the removal of over-the-counter drugs and environmental assessment

“…It was observed that in the initial stage, there was a quick rise in the removal efficiency by N-CA, then reached a plateau after ∼40 min. 68 This rapid adsorption at the initial stage can be because of the complete availability of the number of active sites on N-CA for the adsorption of ASP and PCM. However, after some time the number of available active sites on N-CA became gradually filled with ASP and PCM.…”

Nitrogen-doped carbon nano-onions/polypyrrole nanocomposite based low-cost flexible sensor for room temperature ammonia detection

“…Following the previously reported flame pyrolysis approach, carbon nano-onions (CNOs) were synthesized from used frying oil 27 . In a typical procedure, cotton wick was used to ignite waste frying oil in a clay lamp.…”

Biomass-based graphene aerogel for the removal of emerging pollutants from wastewater

“…PPCPs are the class of emerging pollutants which includes drugs, antibiotics, 68 hormones, fragrances, cosmetics, and sunscreen agents. 69 PPCPs enter the environment through various natural and anthropogenic activities.…”