A review on pollution situation and treatment methods of tetracycline in groundwater

Zhao

et al. 2021

Preprint

The present study aimed to determine the effects of multi-walled carbon nanotubes (MWCNTs) concentrations (0, 0.1, 1, 5, 10 mg·L− 1) on tetracycline (TC) and biogas slurry nutrients removal by microalgae Chlorella vulgaris cultivation. Treatments with 1 mg·L− 1 MWCNTs yielded maximum dry weight and cells quantity of 0.81 ± 0.008 g·L− 1 and 5.83×107 cell·L− 1, respectively. The results of chlorophyll a were consistent with rapid fluorescence induction kinetics (OJIP-test), indicating that moderate MWCNTs concentration could enhance microalgal photosynthesis. Maximum chemical oxygen demand (COD), total phosphorus (TP), total nitrogen (TN), tetracycline (TC), and CO2 removal efficiencies were 90.43 ± 5.15%, 78.12 ± 4.33%, 77.07 ± 4.12%, 89.64 ± 3.08%, and 64.26 ± 0.71%, respectively when treated with 1 mg·L− 1 MWCNTs. Of the five MWCNTs concentrations set in this study, the optimal concentration was 1 mg·L− 1 for nutrient and CO2 removal efficiencies. These results indicated that moderate MWCNTs concentrations would promote tetracycline and nutrients removal by enhancing Chlorella vulgaris photosynthesis activity.

Section: Effects Of Mwcnts Concentration On Nutrient and Tetracyclinementioning

confidence: 99%

Nutrient and Tetracycline Removal From Simulated Biogas Slurry and Biogas Upgrading by Microalgae Cultivation Under Different Carbon Nanotubes Concentration

Zhao

et al. 2021

Preprint

Front. Environ. Sci. Eng.

“…Tetracycline is hard to degrade as it gets converted into more potentially toxic substance over a prolonged period of time, and thus, contaminates various aquatic reservoirs resulting in chronic toxicity (Dai et al, 2019).…”

Section: H I G H L I G H T Smentioning

confidence: 99%

In situ formation of bimetallic FeNi nanoparticles on sand through green technology: Application for tetracycline removal

Ravikumar

Ghosh

Pulimi

et al. 2019

In this study, FeNi nanoparticles were green synthesized using Punica granatum (pomegranate) peel extract, and these nanoparticles were also formed in situ over quartz sand (GS-FeNi) for removal of tetracycline (TC). Under the optimized operating conditions, (GS-FeNi concentration: 1.5% w/v; concentration of TC: 20 mg/L; interaction period: 180 min), 99AE0.2% TC removal was achieved in the batch reactor. The removal capacity was 181AE1 mg/g. A detailed characterization of the sorbent and the solution before and after the interaction revealed that the removal mechanism(s) involved both the sorption and degradation of TC. The reusability of reactant was assessed for four cycles of operation, and 77AE4% of TC removal was obtained in the cycle. To judge the environmental sustainability of the process, residual toxicity assay of the interacted TC solution was performed with indicator bacteria (Bacillus and Pseudomonas) and algae (Chlorella sp.), which confirmed a substantial decrease in the toxicity. The continuous column studies were undertaken in the packed bed reactors using GS-FeNi. Employing the optimized conditions, quite high removal efficiency (978AE5 mg/g) was obtained in the columns. The application of GS-FeNi for antibiotic removal was further evaluated in lake water, tap water, and ground water spiked with TC, and the removal capacity achieved was found to be 781AE5, 712AE5, and 687AE3 mg/g, respectively. This work can pave the way for treatment of antibiotics and other pollutants in the reactors using novel green composites prepared from fruit wastes.

“…The group of TRCs includes tetracycline (TRC), chlorotetracycline, oxytetracycline, and doxycycline [6]. TRC is one of the pharmaceuticals commonly found in waters [6,9]. Its presence in the surface water (range of 1.1-110,000 ng/L), groundwater (range of 9.51-29,700 ng/L), drinking water (range of 11.2-632 ng/L), wastewater (range of 0.0019-12,000 µg/L), sediments (range of 0.1-156,000 ng/g), and sludge (range of 14.3-1620 µg/kg) has been documented [6].…”

Section: Introductionmentioning

confidence: 99%

“…However, as a result of the filtration process, a concentrate is received that needs to be utilized. TRC retention has been shown to be sufficient in reverse osmosis and nanofiltration (NF) tight membranes, and in most cases, it was observed to be over 80% [9]. AOPs and membrane techniques are now increasingly used in wastewater treatment and water recovery processes [4,[44][45][46][47][48].…”

Section: Introductionmentioning

confidence: 99%

Removal of Tetracycline Oxidation Products in the Nanofiltration Process

Żyłła

Ledakowicz

Boruta

et al. 2021

Water

The possibility of removing tetracycline (TRC) from water in an integrated advanced oxidation and membrane filtration process was investigated. Ozonation and UV/H2O2 photooxidation were applied for the destruction of TRC. Six oxidation products (OPs) retaining the structural core of TRC have been identified. One new TRC oxidation product, not reported so far in the literature, was identified—ethyl 4-ethoxybenzoate. All identified OPs were effectively retained on the membrane in the nanofiltration process. However, chemical oxygen demand (COD) measurements of the filtrates showed that in the case of UV/H2O2 oxidation, the OPs passed through the membrane into the filtrate. Various water matrices were used in the research, including the river water untreated and after ozone treatment. It has been shown that organic matter present in surface water can improve pharmaceutical retention, although it contributes to significant membrane fouling. Pre-ozonation of the river water reduced the membrane fouling. The XPS analysis was used to show ozone and H2O2 influence on the top polymer layer of the membrane. It was shown that the oxidants can damage the amide bond of the polyamide.