FeCu-biochar enhances the removal of antibacterial sulfapyridine from groundwater by activation of persulfate
- PDF / 1,213,571 Bytes
- 8 Pages / 595.276 x 790.866 pts Page_size
- 87 Downloads / 235 Views
ORIGINAL PAPER
FeCu‑biochar enhances the removal of antibacterial sulfapyridine from groundwater by activation of persulfate Song Cai1,2 · Yuyan Liu1,2 · Jiawei Chen1,2 Received: 7 February 2020 / Accepted: 1 June 2020 © Springer Nature Switzerland AG 2020
Abstract Waters are often polluted by antibacterial drugs such as sulfonamides, which are widely used in animal husbandry, aquaculture and other sectors. Actual decontamination methods are limited, thus requiring the development of alternative treatments. Here, we hypothesized that a composite of biochar-supported Fe/Cu (FeCu-biochar) would activate persulfate to remove the antibiotic sulfapyridine from aqueous solutions using batch experiments. FeCu-biochar was characterized by scanning electron microscopy with energy-dispersive spectroscopy (SEM–EDS) and X-ray diffraction (XRD). We tested the effect of catalyst type, initial pH and reusability runs. Results show that, compared to Fe-biochar, 1 g/L FeCu-biochar activated 4 mM persulfate better, removing 97.6% of 20 mg/L sulfapyridine in 5 min at pH 8.2. Such enhancement is attributed to the strong oxidization of ·SO4−, the high catalytic ability of CuO and synergistic effects between Fe and Cu. The removal of sulfapyridine by FeCu-biochar was pH-dependent, and the best catalytic performance occurred in alkaline conditions. FeCu-biochar also displayed excellent stability, easy separation and good recyclability. Keywords Sulfapyridine · Biochar-supported · Bimetallic composite · Persulfate activation
Introduction The antibacterial drugs such as sulfonamide have been widely used in animal husbandry, aquaculture and other fields for treatment of diseases and infections. The residues of sulfonamide pose a risk of contaminating groundwater via runoff and seepage (Barnes et al. 2008; Shi et al. 2020). Regarding the typical sulfonamide, sulfapyridine (SPY, C11H11N3O2S) is often detected in the environment and it has been reported that the concentration of sulfapyridine in groundwater ranges from 1 ng/L to 1 ug/L (Baran et al. 2011; Kummerer 2009), which can result in the occurrence of antibiotic resistance genes to threaten the health of humans and other living organisms (Liu et al. 2018). Hence, the feasible remediation of sulfapyridine from polluted water is necessary and developed, such as magnetic ion exchange (Choi * Jiawei Chen [email protected] 1
State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Beijing 100083, People’s Republic of China
School of Earth Sciences and Resources, China University of Geosciences, Beijing 100083, People’s Republic of China
2
et al. 2007), reverse osmosis technology with conventional activated sludge or membrane bioreactor (Sahar et al. 2011) and adsorption with carbon nanotubes (Tian et al. 2013). In recent years, advanced oxidation process (AOP) has received attention due to complete mineralization of organic contaminants by the reactive oxygen species (ROSs) including hydroxyl radical (·OH) and sulfate radical (·SO4−)
Data Loading...
