Effect of Operational Variables on the Hydrogasification of Inner Mongolian Lignite Semicoke

2013 ◽  
Vol 27 (8) ◽  
pp. 4589-4597 ◽  
Author(s):  
Xiaokuo Ding ◽  
Yongfa Zhang ◽  
Tiankai Zhang ◽  
Jian Tang ◽  
Ying Xu ◽  
...  
Keyword(s):  
Lignite Semicoke ◽  
Operational Variables

scholarly journals Oxidation of Citalopram with Sodium Hypochlorite and Chlorine Dioxide: Influencing Factors and NDMA Formation Kinetics

Molecules ◽  
2019 ◽  
Vol 24 (17) ◽  
pp. 3065
Author(s):  
Juan Lv ◽  
Yan Wang ◽  
Na Li
Keyword(s):  
Sodium Hypochlorite ◽  
Chlorine Dioxide ◽  
Wastewater Treatment Plants ◽  
Ph Value ◽  
High Reactivity ◽  
Secondary Effluent ◽  
Water Matrix ◽  
Formation Kinetics ◽  
Operational Variables ◽  
Two Stages

The highly prescribed antidepressant, citalopram, as one of newly emerging pollutants, has been frequently detected in the aquatic environment. Citalopram oxidation was examined during sodium hypochlorite (NaOCl) and chlorine dioxide (ClO2) chlorination processes since conventional wastewater treatment plants cannot remove citalopram effectively. Citalopram has been demonstrated to form N-nitrosodimethylamine (NDMA) during chlorination in our previous study. Further investigation on NDMA formation kinetics was conducted in the present study. Influences of operational variables (disinfectant dose, pH value) and water matrix on citalopram degradation, as well as NDMA generation, were evaluated. The results indicated high reactivity of citalopram with NaOCl and ClO2. NDMA formation included two stages during CIT oxidation, which were linear related with reaction time. NaOCl was more beneficial to remove CIT, but it caused more NDMA formation. Increasing disinfectant dosage promoted citalopram removal and NDMA formation. However, no consistent correlation was found between citalopram removal and pH. Contrary to the situation of citalopram removal, NDMA generation was enhanced when citalopram was present in actual water matrices, especially in secondary effluent. DMA, as an intermediate of citalopram chlorination, contributed to NDMA formation, but not the only way.

scholarly journals Intellectual Capital and Sustainable Economic Performance in the Public Sector: The Context of the New Public Management in Malaysia

2021 ◽  
Vol 13 (14) ◽  
pp. 7885
Author(s):  
Kardina Kamaruddin ◽  
Indra Abeysekera
Keyword(s):  
Public Sector ◽  
Intellectual Capital ◽  
Economic Performance ◽  
Public Management ◽  
Structural Equation ◽  
New Public Management ◽  
The Public ◽  
New Public ◽  
Operational Variables ◽  
Construct Dimensions

The New Public Management allows us to reflect upon whether intellectual capital helps public sector organisations meet their performance benchmarks. Sustainable economic performance gains importance from the public sector’s service ideal. Although there have been empirical endeavours using intellectual capital as operational variables, this study examines the theoretically informed relationship between the intellectual capital construct and its construct dimensions and the sustainable economic performance construct and its construct dimensions. The decision-making inputs of senior officials in the Malaysian public sector are vital for evaluating the relationship, as these officials are the individual strategists of the collective organisational strategy. The study conducted a survey that received 1092 usable responses and analysed them using the structural equation modelling research method. The findings showed a robust theoretical relationship between intellectual capital and sustainable economic performance. Furthermore, the study identified intellectual capital items that play a vital role in supporting public sector sustainable economic performance in Malaysia under New Public Management. The findings provide useful knowledge for public sector officials and policymakers, and for further research.

scholarly journals Electrodeposited Hydroxyapatite-Based Biocoatings: Recent Progress and Future Challenges

Coatings ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 110
Author(s):  
Mir Saman Safavi ◽  
Frank C. Walsh ◽  
Maria A. Surmeneva ◽  
Roman A. Surmenev ◽  
Jafar Khalil-Allafi
Keyword(s):  
Recent Progress ◽  
Tribological Behavior ◽  
Metallic Materials ◽  
Industrial Processing ◽  
Component Size ◽  
Polymeric Particles ◽  
Operational Variables ◽  
Wide Range ◽  
Future Challenges ◽  
Coating Methods

Hydroxyapatite has become an important coating material for bioimplants, following the introduction of synthetic HAp in the 1950s. The HAp coatings require controlled surface roughness/porosity, adequate corrosion resistance and need to show favorable tribological behavior. The deposition rate must be sufficiently fast and the coating technique needs to be applied at different scales on substrates having a diverse structure, composition, size, and shape. A detailed overview of dry and wet coating methods is given. The benefits of electrodeposition include controlled thickness and morphology, ability to coat a wide range of component size/shape and ease of industrial processing. Pulsed current and potential techniques have provided denser and more uniform coatings on different metallic materials/implants. The mechanism of HAp electrodeposition is considered and the effect of operational variables on deposit properties is highlighted. The most recent progress in the field is critically reviewed. Developments in mineral substituted and included particle, composite HAp coatings, including those reinforced by metallic, ceramic and polymeric particles; carbon nanotubes, modified graphenes, chitosan, and heparin, are considered in detail. Technical challenges which deserve further research are identified and a forward look in the field of the electrodeposited HAp coatings is taken.

Removal of heavy metal from soil and groundwater by in-situ electrokinetic remediation

2000 ◽  
Vol 42 (7-8) ◽  
pp. 335-343 ◽  
Author(s):  
S. Shiba ◽  
S. Hino ◽  
Y. Hirata ◽  
T. Seno
Keyword(s):  
Heavy Metals ◽  
Heavy Metal ◽  
Electric Potential ◽  
Potential Gradient ◽  
Electrokinetic Remediation ◽  
Contaminated Aquifer ◽  
Physico Chemical ◽  
Operational Variables ◽  
Mass Transport Process

The operational variables of electrokinetic remediation have not been cleared yet, because this method is relatively new and is an innovative technique in the aquifer remediation. In order to investigate the operational variables of the electrokinetic remediation, a mathematical model has been constructed based on the physico chemical mass transport process of heavy metals in pore water of contaminated aquifer. The transport of the heavy metals is driven not only by the hydraulic flow due to the injection of the purge water but also by the electromigration due to the application of the electric potential gradient. The electric potential between anode and cathode is the important operational variable for the electrokinetic remediation. From the numerical simulations with use of this model it is confirmed that the remediation starts from the up stream anode and gradually the heavy metal is transported to the down stream cathode and drawn out through the purge water.

Oil Spill Dispersant Effectiveness Protocol. I: Impact of Operational Variables

2004 ◽  
Vol 130 (10) ◽  
pp. 1073-1084 ◽  
Author(s):  
George A. Sorial ◽  
Albert D. Venosa ◽  
Karen M. Koran ◽  
Edith Holder ◽  
Dennis W. King
Keyword(s):  
Oil Spill ◽  
Operational Variables ◽  
Dispersant Effectiveness

Production of silicon carbide from microsilica waste by reduction with lignite semicoke

2017 ◽  
Vol 47 (2) ◽  
pp. 108-112
Author(s):  
A. E. Anikin ◽  
G. V. Galevskii ◽  
V. V. Rudneva
Keyword(s):  
Silicon Carbide ◽  
Lignite Semicoke

Slip Velocity in Downer Reactors: Drag Coefficient and the Influence of Operational Variables

2010 ◽  
Vol 49 (15) ◽  
pp. 6735-6744 ◽  
Author(s):  
Mohammad Ashraful Islam ◽  
Stefan Krol ◽  
Hugo I. de Lasa
Keyword(s):  
Drag Coefficient ◽  
Slip Velocity ◽  
Operational Variables

Formation of silicon carbide from microsilica waste by means of lignite semicoke

2016 ◽  
Vol 46 (2) ◽  
pp. 93-98
Author(s):  
A. E. Anikin ◽  
G. V. Galevskii ◽  
V. V. Rudneva
Keyword(s):  
Silicon Carbide ◽  
Lignite Semicoke

scholarly journals Spatial analysis of deaths from pulmonary tuberculosis in the city of São Luís, Brazil

2014 ◽  
Vol 40 (5) ◽  
pp. 543-551 ◽  
Author(s):  
Marcelino Santos-Neto ◽  
Mellina Yamamura ◽  
Maria Concebida da Cunha Garcia ◽  
Marcela Paschoal Popolin ◽  
Tatiane Ramos dos Santos Silveira ◽  
...  
Keyword(s):  
Spatial Distribution ◽  
Pulmonary Tuberculosis ◽  
Secondary Data ◽  
Positive Association ◽  
Significant Positive Association ◽  
Public Health Policies ◽  
Operational Characteristics ◽  
Operational Variables ◽  
The City ◽  
Selection Of

OBJECTIVE: To characterize deaths from pulmonary tuberculosis, according to sociodemographic and operational variables, in the city of São Luís, Brazil, and to describe their spatial distribution. METHODS: This was an exploratory ecological study based on secondary data from death certificates, obtained from the Brazilian Mortality Database, related to deaths from pulmonary tuberculosis. We included all deaths attributed to pulmonary tuberculosis that occurred in the urban area of São Luís between 2008 and 2012. We performed univariate and bivariate analyses of the sociodemographic and operational variables of the deaths investigated, as well as evaluating the spatial distribution of the events by kernel density estimation. RESULTS: During the study period, there were 193 deaths from pulmonary tuberculosis in São Luís. The median age of the affected individuals was 52 years. Of the 193 individuals who died, 142 (73.60%) were male, 133 (68.91%) were Mulatto, 102 (53.13%) were single, and 64 (33.16%) had completed middle school. There was a significant positive association between not having received medical care prior to death and an autopsy having been performed (p = 0.001). A thematic map by density of points showed that the spatial distribution of those deaths was heterogeneous and that the density was as high as 8.12 deaths/km2. CONCLUSIONS: The sociodemographic and operational characteristics of the deaths from pulmonary tuberculosis evaluated in this study, as well as the identification of priority areas for control and surveillance of the disease, could promote public health policies aimed at reducing health inequities, allowing the optimization of resources, as well as informing decisions regarding the selection of strategies and specific interventions targeting the most vulnerable populations.

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