Study on Treatment of Secondary Sedimentation Wastewater by Sodium Hypochlorite Oxidation, Activated Carbon Adsorption and Coagulation Precipitation

In this paper, CODCr index was adopted as the test item, and the wastewater from the secondary sedimentation tank of a sewage treatment plant selected was treated by the method of "sodium hypochlorite oxidation - activated carbon adsorption - coagulation precipitation". The results showed that the removal rate of CODCr reached 57.3% by the treatment of "sodium hypochlorite oxidation - activated carbon adsorption - coagulation precipitation". Therefore, this method can improve the removal rate of CODCr, can make the wastewater discharging standard, and for the project provides data support to better treatment of industrial wastewater. Keywords Secondary settling tank; CODCr; Fenton oxidation; Sodium hypochlorite oxidation; Treat reach the standard DOI: 10.7176/CER/11-6-01 Publication date:July 31st 201

Adsorption of Ultra-High Crosslinked Resin on Waste Water from Benzoic Acid and Sorbic Acid

Aiming at the simulated production wastewater of benzoic acid and sorbic acid, the adsorption and desorption resource recovery system of ultra-high crosslinked resin ZH-01 was designed and developed, and the influence of ZH-01 on the removal of benzoic acid and sorbic acid production wastewater was studied. The results showed that the removal rates of benzoic acid and sorbic acid were 94.74% and 94.9%, respectively, and the removal rate of CODcr was as high as 91.2%. In addition, the adsorption properties of ZH-01 on benzoic acid and sorbic acid were investigated. When sodium hydroxide was used for resin desorption, the effects of temperature, desorption agent ratio and desorption velocity on resin desorption were investigated. Benzoic acid and sorbic acid were recovered to the maximum extent, and the recycling of benzoic acid and sorbic acid in waste water was realized. Keywords Ultra high crosslinked resin ZH-01; Simulated production wastewater with benzoic acid and sorbic acid; Resource recovery. DOI: 10.7176/JRDM/57-05 Publication date:July 31st 201

Analysis of the Main Problems and Countermeasures of the Modern Apprenticeship Talents Training Model

The changes in our country’s economic development and the demand structure of talent have put forward higher requirements for personnel training in vocational education. The author starts from the present situation of the modern apprenticeship talent training mode, then compares and analyzes the hidden problems in modern Chinese apprenticeship talent training mode, and tries to propose solutions by reviewing literature, making surveys and combining with years of experience in vocational education teaching management.     Keywords: modern apprenticeship, literacy education, problems and countermeasure

Coexistence and competition of multiple charge-density-wave orders in rare-earth tri-telluride RTe3

The occurrences of collective quantum states, such as superconductivity (SC) and charge- or spin-densitywaves (CDWs or SDWs), are among the most fascinating phenomena in solids. To date much effort has been made to explore the interplay between different orders, yet little is known about the relationship of multiple orders of the same type. Here we report optical spectroscopy study on CDWs in the rare-earth tri-telluride compounds RTe3 (R = rare earth elements). Besides the prior reported two CDW orders, the study reveals unexpectedly the presence of a third CDW order in the series which evolves systematically with the size of R element. With increased chemical pressure, the first and third CDW orders are both substantially suppressed and compete with the second one by depleting the low energy spectral weight. A complete phase diagram for the multiple CDW orders in this series is established.Comment: 7 pages, 4 figures, 1 tabl

Treatment of Secondary Sedimentation Tank Wastewater by Fenton Oxidation-Neutralization-Coagulation Sedimentation

In this paper, the CODCr index is used as the detection item, and the wastewater from the secondary clarifier of a sewage treatment plant is treated by "Fenton oxidation-neutralization-coagulation sedimentation" method. The results showed that the removal rate of CODCr reached 73.4% by "Fenton oxidation-neutralization-coagulation precipitation" method. It can be seen that this method can make the wastewater discharge up to the standard and provide data support for better treatment of industrial wastewater in engineering. Keywords Secondary sedimentation tank; CODCr; Fenton oxidation; Up-to-standard emissions DOI: 10.7176/JEES/9-7-01 Publication date:July 31st 201

Metabolomic analysis of human oral cancer cells with adenylate kinase 2 or phosphorylate glycerol kinase 1 inhibition.

The purpose of this study was to use liquid chromatography-mass spectrometry (LC-MS) with XCMS for a quantitative metabolomic analysis of UM1 and UM2 oral cancer cells after knockdown of metabolic enzyme adenylate kinase 2 (AK2) or phosphorylate glycerol kinase 1 (PGK1). UM1 and UM2 cells were initially transfected with AK2 siRNA, PGK1 siRNA or scrambled control siRNA, and then analyzed with LC-MS for metabolic profiles. XCMS analysis of the untargeted metabolomics data revealed a total of 3200-4700 metabolite features from the transfected UM1 or UM2 cancer cells and 369-585 significantly changed metabolites due to AK2 or PGK1 suppression. In addition, cluster analysis showed that a common group of metabolites were altered by AK2 knockdown or by PGK1 knockdown between the UM1 and UM2 cells. However, the set of significantly changed metabolites due to AK2 knockdown was found to be distinct from those significantly changed by PGK1 knockdown. Our study has demonstrated that LC-MS with XCMS is an efficient tool for metabolomic analysis of oral cancer cells, and knockdown of different genes results in distinct changes in metabolic phenotypes in oral cancer cells