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Browsing by Author Le, Thanh Son

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Article

Electro-generation of hydrogen peroxide for electro-Fenton: Application in Glyphosate herbicide treatment

Authors: Le, Thanh Son; Tran, Manh Hai; Doan, Tuan Linh (2017)

One of the major and serious pollution issues in an agriculture-based country as Vietnam is derived from herbicide, especially Glyphosate herbicide which can cause a massive quantity of adverse effects and acute toxicity to aquatic life and human health. Hence, this research focused on setting up an electro-Fenton system with a Pt gauze anode and a commercial carbon felt cathode for Glyphosate herbicide treatment with the primary mechanism based on the in situ hydrogen peroxide electro-generation and ferrous ion catalyst regeneration. This study investigated effect of initial pH and current intensity on both the amount of hydrogen peroxide production and the Glyphosate mineralization ...

Article

Electrocoagulation for ammonium removal in Nam Son landfill leachate

Authors: Le, Thanh Son; Le, Cao Khai; Nguyen, Thi Ha; Doan, Tuan Linh; Doan, Thi Anh (2017)

In this paper, an electrocoagulation reactor was set up to investigate the ammonium removal in Nam Son landfill leachate. The research focused on studying several factors that affect to the ammonium removal namely current intensity, operating time, initial pH and electrode materials. Mono-polar electrocoagulation reactor was conducted in a batch system with iron electrodes and 1.8 L leachate. The research indicated that current intensity and operating time are directly proportional with NH4+ treatment performance. When applied current increased from 1 to 4A, the NH4+ removal percentage went up from 14.03 to 24.99% after a 1 hour treatment. The effect of initial pH in range of 5 to 10 ...

Production-of-cobalt-copper-from-partial-reduction-of-La-Co-Cu-O3-perovskites-for-CO-hydrogenation_2016_Journal-of-Science-Advanced-Materials-and-Devi.pdf.jpg

Article

The present work deals with the development of polystyrene (PS) nanocomposites through solvent blending technique with diverse contents of modified CoeAl layered double hydroxide (LDH). The prepared PS as well as PS/CoeAl LDH (1e7 wt.%) nanocomposites were characterized by X-ray diffraction (XRD), transmission electron microscopy (TEM), Fourier transform infrared spectroscopy (FTIR), rheo-logical analysis, thermogravimetric analysis (TGA) and differential scanning calorimetry (DSC). The XRD results suggested the formation of exfoliated structure, while TEM images clearly indicated the inter-calated morphology of PS nanocomposites at higher loading. The presence of various functional groups in the CoeAl LDH and PS/CoeAl LDH nanocomposites was verified by FTIR analysis. TGA data confirmed that the thermal stability of PS composites was enhanced significantly as compared to pristine PS. While considering 15% weight loss as a reference point, it was found that the thermal degradation (Td) tem-perature increased up to 28.5 C for PS nanocomposites prepared with 7 wt.% CoeAl LDH loading over pristine PS. All the nanocomposite samples displayed superior glass transition temperature (Tg), in which PS nanocomposites containing 7 wt.% LDH showed about 5.5 C higher Tgover pristine PS. In addition, the kinetics for thermal degradation of the composites was studied using Coats-Redfern method. The Criado method was ultimately used to evaluate the decomposition reaction mechanism of the nano-composites. The complex viscosity and rheological muduli of nanocomposites were found to be higher than that of pristine PS when the frequency increased from 0.01 to 100 s 1

Authors: Nguyen, Tien Thao; Le, Thanh Son (2016)

La(CoCuO3) nanoperovskites have been prepared by the mechano-synthesis method and treated with hydrogen to yield a high dispersion of bimetallic Co-Cu sites. The reduced LaCo1-xCuxO3samples were characterized by XRD, H2-TPR, CO and H2chemisorption and tested for CO dissociation and for alcohol synthesis from syngas. The experimental results indicated that the activities in CO dissociation and hydrogenation on copper-cobalt metals extracted from perovskite lattice crystals are significantly different from those in the extra-perovskite lattice. The overall catalytic activity in syngas conversion is correlated with the Co-Cu metal surface, but the alcohol productivity e productivity ...

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Browsing by Author Le, Thanh Son

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Browsing by Author Le, Thanh Son