Optimization of Fenton process on removing antibiotic resistance genes from excess sludge by single-factor experiment and response surface methodology

Luo, Ling; Wang, Guolan; Wang, Zimu; Ma, Jun; He, Yan; He, Jinsong; Wang, Lilin; Liu, Yan; Xiao, Hong; Xiao, Yinling; Lan, Ting; Yang, Hua; Deng, Ouping

doi:10.1016/j.scitotenv.2021.147889

Cited by 28 publications

(12 citation statements)

References 57 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Additionally, the relative abundance of Firmicutes was increased by both nZnO and nZVI addition, suggesting that these bacteria were more resistant to nZnO and nZVI disturbance. These results implied that Firmicutes may play an essential role in spreading tet-ARGs/ intI1 , consistent with our previous studies [ 16 , 17 ]. By comparison, nZnO seemed more toxic to bacteria than nZVI because a lower concentration of nZnO (e.g., nZnO-4) also significantly altered the bacterial community ( Figure 3 B).…”

Section: Discussionsupporting

confidence: 93%

“…The extracted DNA was checked for quality using Nanodrop 2000 (Thermo, Waltham, MA, USA) to ensure the value of A 260–280 ranged from 1.8 to 2.0, and the DNA concentration was higher than 10 ng μL −1 . Afterward, the DNA was stored at −80 °C before further analysis [ 17 ].…”

Section: Methodsmentioning

confidence: 99%

“…A PCR Thermal Cycler Dice Real-Time System (Applied Biosystems, Foster City, CA, USA) was applied to conduct a quantitative-PCR procedure. The PCR procedure was as follows: 2 min initial denaturation at 95 °C followed by 40 cycles of denaturation at 95 °C for 10 s, and anneal and extended at 60 °C for 40 s [ 17 ]. The absolute abundance of target genes was represented as Log 10 (gene copies) g −1 dry sediment.…”

Section: Methodsmentioning

confidence: 99%

“…Currently, efforts have been mainly focused on reducing ARGs before they enter the environment (i.e., source control). For example, technologies such as composting, alkaline treatment, Fenton treatment, membrane filtration, and others, have been applied to control the abundance of ARGs, and several technologies are efficient in lowering ARGs [ 14 , 15 , 16 , 17 ]. However, technologies for reducing ARGs that already existed in the environment (i.e., site remediation) have been less investigated.…”

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

The Dual Roles of Nano Zero-Valent Iron and Zinc Oxide in Antibiotics Resistance Genes (ARGs) Spread in Sediment

Luo

Deng

Zhao

et al. 2022

IJERPH

Self Cite

View full text Add to dashboard Cite

Nanoparticles (NPs) are widely used and ubiquitous in the environment, but the consequences of their release into the environment on antibiotics resistance genes (ARGs), microbial abundance, and community, are largely unknown. Therefore, this study examined the effect of nano zero-valent iron (nZVI) and zinc oxide (nZnO) on tetracycline resistance genes (tet-ARGs) and class 1 integron (intI1) in sediment under laboratory incubation. The coexistence of NPs and tetracycline (TC) on tet-ARGs/intI1 was also investigated. It was found that nZVI and nZnO promoted tet-ARGs/intI1 abundance in sediment without TC but reduced the inducing effect of TC on tet-ARGs/intI1 in sediment overlaid with TC solution. Without TC, nZVI, intI1, and the bacterial community could directly promote tet-ARGs spread in nZVI sediment, while intI1 and bacterial abundance were the most directly important reasons for tet-ARGs spread in nZnO sediment. With TC, nZVI and bacterial community could reduce tet-ARGs abundance in nZVI sediment, while nZnO and bacterial community could directly promote tet-ARGs in nZnO sediment. Finally, these findings provided valuable information for understanding the role of NPs in promoting and reducing ARGs in the environment.

show abstract

Section: Discussionsupporting

confidence: 93%

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

The Dual Roles of Nano Zero-Valent Iron and Zinc Oxide in Antibiotics Resistance Genes (ARGs) Spread in Sediment

Luo

Deng

Zhao

et al. 2022

IJERPH

Self Cite

View full text Add to dashboard Cite

show abstract

“…R 2 Adj were 0.9473, 0.9872, 0.9367, indicating that the models could explain 94.73%, 98.72%, 93.67% of the changes in response values, respectively, and the regression models could better predict the experimental results and optimize the process parameters [31]. The AP values of the models in this experiment were 24.562, 34.144, 18.622, all greater than 4, while the coefficients of variation CV were 0.63%, 0.52%, 1.06%, all less than 10%, indicating that the models are highly accurate and stable [34,35]. In summary, RSM can better simulate the removal patterns of magnetically modified lignite for Cu 2+ , Zn 2+ , and Pb 2+ , and is a meaningful model.…”

Section: Analysis Of Response Surface Experimental Resultsmentioning

confidence: 86%

Optimization of Preparation of Fe3O4-L by Chemical Co-Precipitation and Its Adsorption of Heavy Metal Ions

Di¹,

Sun²,

Zhang³

et al. 2023

Journal of Renewable Materials

View full text Add to dashboard Cite

To address the serious pollution of heavy metals in AMD, the difficulty and the high cost of treatment, Fe 3 O 4 -L was prepared by the chemical co-precipitation method. Based on the single-factor and RSM, the effects of particle size, total Fe concentration, the molar ratio of Fe 2+ to Fe 3+ and water bath temperature on the removal of AMD by Fe 3 O 4 -L prepared by chemical co-precipitation method were analyzed. Static adsorption experiments were conducted on Cu 2+ , Zn 2+ and Pb 2+ using Fe 3 O 4 -L prepared under optimal conditions as adsorbents. The adsorption properties and mechanisms were analyzed by combining SEM-EDS, XRD and FTIR for characterization. The study showed that the effects of particle size, total Fe concentration and the molar ratio of Fe 2+ to Fe 3+ are larger. Obtained by response surface optimization analysis, the optimum conditions for the preparation of Fe 3 O 4 -L were a particle size of 250 mesh, a total Fe concentration of 0.5 mol/L, and a molar ratio of Fe 2+ to Fe 3+ of 1:2. Under these conditions, the removal rates of Cu 2+ , Zn 2+ , and Pb 2+ were 94.52%, 88.49%, and 96.69% respectively. The adsorption of Cu 2+ , Zn 2+ and Pb 2+ by Fe 3 O 4 -L prepared under optimal conditions reached equilibrium at 180 min, with removal rates of 99.99%, 85.27%, and 97.48%, respectively. The adsorption reaction of Fe 3 O 4 -L for Cu 2+ and Zn 2+ is endothermic, while that for Pb 2+ is exothermic. Fe 3 O 4 -L can still maintain a high adsorption capacity after five cycles of adsorption-desorption experiments. Cu 2+ , Zn 2+ and Pb 2+ mainly exist as CuFe 2 O 4 , Zn(OH) 2 , ZnFe 2 O 4 and PbS after being adsorbed by Fe 3 O 4 -L, which is the result of the combination of physical diffusion, ion exchange and surface complexation reaction.

show abstract

Advances of responsive deep eutectic solvents and application in extraction and separation of bioactive compounds

Zhang

Gul

et al. 2023

J of Separation Science

View full text Add to dashboard Cite

In recent years, it has been found that changing ambient conditions (CO2/N2, temperature, pH) can trigger a switchable phase transition of deep eutectic solvents, and such solvents are known as responsive deep eutectic solvents. In this work, we present the development history, properties, and preparation of responsive deep eutectic solvents, followed by the application of responsive deep eutectic solvents in the extraction and separation of bioactive compounds are presented. Importantly, the mechanism of responsive deep eutectic solvents in the extraction of bioactive compounds is discussed. Finally, the challenges and prospects of responsive deep eutectic solvents in the extraction and separation of bioactive compounds are proposed. Responsive deep eutectic solvents are considered green and efficient solvents. Some methods for extraction and separation of bioactive compounds by responsive deep eutectic solvents can increase the possibility of recycling the deep eutectic solvents, and provide higher efficiency in the extraction and separation field. It is hoped that this will provide a reference for the green and sustainable extraction and separation of various bioactive compounds.

show abstract

Optimization of Fenton process on removing antibiotic resistance genes from excess sludge by single-factor experiment and response surface methodology

Cited by 28 publications

References 57 publications

The Dual Roles of Nano Zero-Valent Iron and Zinc Oxide in Antibiotics Resistance Genes (ARGs) Spread in Sediment

The Dual Roles of Nano Zero-Valent Iron and Zinc Oxide in Antibiotics Resistance Genes (ARGs) Spread in Sediment

Optimization of Preparation of Fe3O4-L by Chemical Co-Precipitation and Its Adsorption of Heavy Metal Ions

Advances of responsive deep eutectic solvents and application in extraction and separation of bioactive compounds

Contact Info

Product

Resources

About