Microwave-assisted ultraviolet digestion: an efficient method for the digestion of produced water from crude oil extraction and further metal determination

2017 ◽  
Vol 32 (12) ◽  
pp. 2439-2446 ◽  
Author(s):  
J. P. Souza ◽  
P. S. Barela ◽  
K. Kellermann ◽  
M. F. P. Santos ◽  
D. P. Moraes ◽  
...  
Keyword(s):  
Ultraviolet Radiation ◽  
Crude Oil ◽  
Efficient Method ◽  
Produced Water ◽  
Oil Extraction ◽  
Icp Oes ◽  
Metal Determination ◽  
Microwave Assisted ◽  
First Time

Microwave coupled to ultraviolet radiation is proposed for the first time for produced water digestion allowing metal determination by ICP-OES.

scholarly journals Multivariate optimization of a procedure employing microwave-assisted digestion for the determination of nickel and vanadium in crude oil by ICP OES

Talanta ◽  
2018 ◽  
Vol 178 ◽  
pp. 842-846 ◽  
Author(s):  
Shirlei L. dos Anjos ◽  
Jeferson C. Alves ◽  
Sarah A. Rocha Soares ◽  
Rennan G.O. Araujo ◽  
Olivia M.C. de Oliveira ◽  
...  
Keyword(s):  
Crude Oil ◽  
Icp Oes ◽  
Multivariate Optimization ◽  
Microwave Assisted ◽  
Determination Of Nickel ◽  
Microwave Assisted Digestion

Multielement analysis of crude oil produced water by ICP OES after acid digestion assisted by microwave

2015 ◽  
Vol 30 (5) ◽  
pp. 1154-1160 ◽  
Author(s):  
Taiane Rodrigues Penha ◽  
Jenifer Rigo Almeida ◽  
Rafael Mantovaneli Sousa ◽  
Eustáquio Vinicius Ribeiro de Castro ◽  
Maria Tereza Weitzel Dias Carneiro ◽  
...  
Keyword(s):  
Crude Oil ◽  
Environmental Impacts ◽  
Produced Water ◽  
High Salinity ◽  
Multielement Analysis ◽  
Icp Oes ◽  
Acid Digestion ◽  
Crust Formation ◽  
Toxic Components

Crude oil produced water characterization is important because its disposal or reuse is difficult: environmental impacts (high salinity and toxic components) or risk of obstruction on the production columns (crust formation).

scholarly journals NewCernotinacaddisflies from the Ecuadorian Amazon (Trichoptera: Polycentropodidae)

PeerJ ◽  
2017 ◽  
Vol 5 ◽  
pp. e3960 ◽  
Author(s):  
Lucas M. Camargos ◽  
Blanca Ríos-Touma ◽  
Ralph W. Holzenthal
Keyword(s):  
New Species ◽  
Crude Oil ◽  
Male Genitalia ◽  
Amazon Basin ◽  
Oil Extraction ◽  
Environmental Threat ◽  
Two New Species ◽  
Ecuadorian Amazon ◽  
First Time

Two new species of the caddisfly genusCernotinaRoss, 1938 (Polycentropodidae) are described from the lowland Amazon basin of Ecuador,Cernotina tiputini, new species, andCernotina waorani, new species. These represent the first new species described from this region. We also record from Ecuador for the first timeCernotina hastilisFlint, previously known from Tobago, and present new Ecuadorian locality records forC.cygneaFlint, andC.lobisomemSantos & Nessimian. The homology of the intermediate appendage of the male genitalia of this genus is established. The region surveyed is under severe environmental threat from logging, mining, and crude oil extraction, making the description of the biodiversity of the region imperative.

New Insights into the Nature of the Band Gap of CuGeO3 Nanoparticles: Synthesis, Electronic Structure, and Optical and Photocatalytic Properties

2019 ◽  
Author(s):  
Victor Y. Suzuki ◽  
Luís Henrique Cardozo Amorin ◽  
Natália H. de Paula ◽  
Anderson R. Albuquerque ◽  
Julio Ricardo Sambrano ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Band Gap ◽  
Material Design ◽  
Photocatalytic Properties ◽  
Critical Parameters ◽  
Synthetic Approach ◽  
Microwave Assisted ◽  
Theoretical Approaches ◽  
Nanoparticles Synthesis ◽  
First Time

<p>We report, for the first time, new insights into the nature of the band gap of <a>CuGeO<sub>3</sub> </a>(CGO) nanocrystals synthesized from a microwave-assisted hydrothermal method in the presence of citrate. To the best of our knowledge, this synthetic approach has the shortest reaction time and it works at the lowest temperatures reported in the literature for the preparation of these materials. The influence of the surfactant on the structural, electronic, optical, and photocatalytic properties of CGO nanocrystals is discussed by a combination of experimental and theoretical approaches, and that results elucidates the nature of the band gap of synthetized CGO nanocrystals. We believe that this particular strategy is one of the most critical parameters for the development of innovative applications and that result could shed some light on the emerging material design with entirely new properties.</p> <p><b> </b></p>

Microwave-Assisted Grafting to MCM-41 Silica and its Application as Catalyst in Flow Chemistry

2011 ◽  
Vol 64 (11) ◽  
pp. 1522 ◽  
Author(s):  
Manuela Oliverio ◽  
Antonio Procopio ◽  
Toma N. Glasnov ◽  
Walter Goessler ◽  
C. Oliver Kappe
Keyword(s):  
Continuous Flow ◽  
Rate Increase ◽  
Flow Chemistry ◽  
Conventional Heating ◽  
Kinetic Effect ◽  
Microwave Technology ◽  
Microwave Assisted ◽  
Technology Control ◽  
First Time ◽  
Mcm 41

Finding environmentally gentle methods to graft Lewis acid on the surface of mesoporous materials is a topic of current interest. Herein we describe the optimization of a preparation procedure of a mesoporous silica-supported ErIII catalyst using the microwave-assisted post-calcination functionalization of Mobil Composition of Matter-41 silica as the key step. The required time for functionalization was reduced from several hours to 10 min using sealed-vessel microwave technology. Control experiments using conventional heating at the same temperature demonstrated that the rate increase is owing to a simple thermal/kinetic effect as a result of the higher reaction temperature. The resulting ErIII catalyst was tested for the first time as a catalyst in the continuous flow deprotection of benzaldehyde dimethylacetal and a complete leaching study was performed.

STATISTICAL CHARACTERISTICS OF SLANT ANGLES IN HANDWRITTEN NUMERAL STRINGS AND EFFECTS OF SLANT CORRECTION ON SEGMENTATION

2010 ◽  
Vol 24 (01) ◽  
pp. 97-116 ◽  
Author(s):  
JAVAD SADRI ◽  
CHING Y. SUEN ◽  
TIEN D. BUI
Keyword(s):  
Efficient Method ◽  
Weighted Average ◽  
Correction Method ◽  
Statistical Characteristics ◽  
Geometric Features ◽  
Correction Algorithm ◽  
Connected Component ◽  
Slant Angle ◽  
Segmentation Accuracy ◽  
First Time

A novel and efficient method for correction of slant angles in handwritten numeral strings is proposed. For the first time, the statistical distribution of slant angles in handwritten numerals is investigated and the effects of slant correction on the segmentation of handwritten numeral strings are shown. In our proposed slant correction method, utilizing geometric features, a Component Slant Angle (CSA) is estimated for each connected component independently. A weighted average is then used to compute the String Slant Angle (SSA), which is applied uniformly to correct the slant of all the components in numeral strings. Our experimental results have revealed novel statistics for slant angles of handwritten numeral strings, and also showed that slant correction can significantly improve extraction of segmentation features and segmentation accuracy of touching numerals. Comparison between our slant correction algorithm and similar algorithms in the literature show that our algorithm is more efficient, and on average it has a faster running time.

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