Natural mackinawite catalytic ozonation for N, N-dimethylacetamide (DMAC) degradation in aqueous solution: Kinetic, performance, biotoxicity and mechanism
-
Add time:09/27/2019 Source:sciencedirect.com
To enhance the degradation of N, N-dimethylacetamide (DMAC) in aqueous solution, the natural mackinawite (NM) is introduced for catalytic ozonation in this study as it is an environmentally friendly catalyst with low cost and easy availability. The properties of the NM were initially characterized via scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Fourier Transform infrared spectroscopy (FTIR) and X-ray photoelectron spectroscopy (XPS). Then, impact factors including NM dosage, ozone gas concentration and initial pH were investigated and the optimal conditions (i.e., NM dosage = 3.5 g/L, ozone gas concentration = 300 L/min, initial pH = 6.8) were obtained in NM/O3 process. Besides, the superiority of the NM/O3 process was confirmed by the experiments that the degradation efficiency of DMAC in the NM/O3 process (i.e., 95.4%) was much higher than that in the zero-valent iron (ZVI)/O3 process (i.e., 46.1%) and the synthetic FeS/O3 process (i.e., 68.6%). Furthermore, the intermediate and possible degradation pathway of DMAC were proposed, and the biological toxicity of the intermediate was subsequently evaluated by the activated sludge. Finally, the mechanism of the NM/O3 process was proposed in this study based on control experiment and radical scavenging experiment. The extraordinary efficiency for DMAC degradation was found to be mainly caused by HO• of the reactive oxygen species (ROS) (i.e., HO•, O2•- and H2O2) generated in the NM/O3 process. Therefore, this study confirmed that NM was a high efficient catalyst for degradation the toxic and refractory pollutants in catalytic ozonation system.
We also recommend Trading Suppliers and Manufacturers of N,N-Dimethylacetamide (cas 127-19-5). Pls Click Website Link as below: cas 127-19-5 suppliers
Prev:Thermophysical study of the binary mixtures of N,N-Dimethylacetamide (cas 127-19-5) with 1-propanol and 1-butanol
Next:Homogenous synthesis of sodium cellulose sulfates with regulable low and high degree of substitutions with SO3/Py in N,N-Dimethylacetamide (cas 127-19-5)/LiCl) - 【Back】【Close 】【Print】【Add to favorite 】
- Related Information
- Full Length ArticleThermophysical study of the binary mixtures of N,N-Dimethylacetamide (cas 127-19-5) with 2-propanol and 2-butanol09/30/2019
- Solvation of alkaline earth metal ions in N,N-dimethylformamide and N,N-Dimethylacetamide (cas 127-19-5) – A volumetric and acoustic study09/29/2019
- Thermodynamics of amide + amine mixtures. 5. excess molar enthalpies of N,N-dimethylformamide or N,N-Dimethylacetamide (cas 127-19-5) + N-propylpropan-1-amine, + N-butylbutan-1-amine, + butan-1-amine, or + hexan-1-amine systems at 298.15 K. application of the ERAS model09/28/2019
- Homogenous synthesis of sodium cellulose sulfates with regulable low and high degree of substitutions with SO3/Py in N,N-Dimethylacetamide (cas 127-19-5)/LiCl10/01/2019
- Thermophysical study of the binary mixtures of N,N-Dimethylacetamide (cas 127-19-5) with 1-propanol and 1-butanol09/26/2019
- Enhanced enzymatic hydrolysis of wheat straw via a combination of alkaline hydrogen peroxide and lithium chloride/N,N-Dimethylacetamide (cas 127-19-5) pretreatment09/25/2019
- Convenient N-acetylation of amines in N,N-Dimethylacetamide (cas 127-19-5) with N,N-carbonyldiimidazole09/24/2019
- Solvation of ionic liquids based on N-methyl-N-alkylmorpholinium cations in N,N-dimethylformamide and N,N-Dimethylacetamide (cas 127-19-5) – Volumetric and compressibility studies09/10/2019
- Ligand substitution in cis-bis(acetonitrile)tetrachlororhenium(IV) complex with N,N-dimethylformamide and N,N-Dimethylacetamide (cas 127-19-5)09/09/2019