scholarly journals Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

2020 ◽  
Author(s):  
Francisco J. Alguacil ◽  
Félix A. López
Keyword(s):  
Organic Compounds ◽  
Toxic Metal ◽  
Adsorption Processing ◽  
Different Sources ◽  
Widespread Interest

Mercury is a toxic metal, thus, it is an element which has more and more restrictions in its uses, but despite the above, the removal of this metal, from whatever the form in which it is encountered (zero valent metal, inorganic or organic compounds), and from different sources, is of a widespread interest. In the case of Hg(II), or Hg2+, the investigations about the treatment of Hg(II)-bearing liquid effluents (real or in most cases synthetic solutions) appear not to end, and from the various separation technologies, adsorption is the most popular among researchers. In this topic, and in the 2019 year, more than 100 publications had been devote to this field: Hg(II)-removal-adsorption. This work examined all of them.

scholarly journals Adsorption Processing for the Removal of Toxic Hg(II) from Liquid Effluents: Advances in the 2019 Year

Metals ◽  
2020 ◽  
Vol 10 (3) ◽  
pp. 412 ◽  
Author(s):  
Francisco J. Alguacil ◽  
Félix A. López
Keyword(s):  
Organic Compounds ◽  
Toxic Metal ◽  
Adsorption Processing ◽  
Different Sources ◽  
Widespread Interest

Mercury is a toxic metal, thus, it is an element which has more and more restrictions in its uses, but despite the above, the removal of this metal, from whatever the form in which it is encountered (zero valent metal, inorganic, or organic compounds), and from different sources, is of a widespread interest. In the case of Hg(II), or Hg2+, the investigations about the treatment of Hg(II)-bearing liquid effluents (real or in most cases synthetic solutions) appear not to end, and from the various separation technologies, adsorption is the most popular among researchers. In this topic, and in the 2019 year, more than 100 publications had been devoted to this field: Hg(II)-removal-adsorption. This work examined all of them.

VOCC: a database of volatile organic compounds in cancer

RSC Advances ◽  
2016 ◽  
Vol 6 (115) ◽  
pp. 114783-114789 ◽  
Author(s):  
Subhash Mohan Agarwal ◽  
Mansi Sharma ◽  
Shehnaz Fatima
Keyword(s):  
Volatile Organic Compounds ◽  
Organic Compounds ◽  
Comprehensive Information ◽  
Volatile Organic ◽  
Different Sources

Volatile organic compounds in cancer database (VOCC) has been developed, which provides comprehensive information of VOCs distinctly observed in cancer vs. normal from various malignancies and different sources.

scholarly journals Electrochemical Treatment of Mixed and Hazardous Waste

1995 ◽  
Vol 412 ◽  
Author(s):  
J. Dziewinski ◽  
S. Marczak ◽  
E. Nuttall ◽  
W. Smith
Keyword(s):  
Organic Compounds ◽  
National Laboratory ◽  
Experimental Studies ◽  
Toxic Metal ◽  
Electrochemical Treatment ◽  
Electrochemical Process ◽  
Feed System ◽  
Chlorinated Organic Compounds ◽  
Bench Scale ◽  
Mixed Wastes

AbstractLos Alamos National Laboratory (LANL) and The University of New Mexico are jointly developing an electrochemical process for treating hazardous and radioactive wastes. The wastes treatable by the process include toxic metal solutions, cyanide solutions, and various organic wastes that may contain chlorinated organic compounds. The main component of the process is a stack of electrolytic cells with peripheral equipment such as a rectifier, feed system, tanks with feed and treated solutions, and a gas-venting system. During the treatment, toxic metals are deposited on the cathode, cyanides are oxidized on the anode, and organic compounds are anodically oxidized by direct or mediated electrooxidation, depending on their type. Bench scale experimental studies have confirmed the feasibility of applying electrochemical systems to processing of a great variety of hazardous and mixed wastes. The operating parameters have been defined for different waste compositions using surrogate wastes. Mixed wastes are currently treated at bench scale as part of the treatability study.

scholarly journals Thermal Adsorption Processing of Hydrocarbon Residues

2020 ◽  
Author(s):  
Sudad H Al-Obaidi ◽  
Guliaeva NI
Keyword(s):  
Organic Compounds ◽  
Contact Time ◽  
Raw Materials ◽  
Organometallic Compounds ◽  
Raw Material ◽  
Oil Processing ◽  
The Us ◽  
Heavy Gas ◽  
Adsorption Processing ◽  
Refining Processes

The raw materials of secondary catalytic processes must be prerefined. Among these refining processes are the deasphalting and demetallization including their thermo adsorption (or thermo-contact adsorption) variety. In oil processing, four main processes of thermo-adsorption refining of hydrocarbon residues are used—Asphalt Residual Treating- residues deasphaltizing (ART), Discriminatory Destructive Distillation (3D), developed in the US; Adsorption-Contact Treatment (ACT) and Express Thermo-Contact Cracking (ETCC), developed in Russia. ART and ACT are processes with absorbers of lift-type reactor, while 3D and ETCC processes are with an adsorbing reactor having ultrashort contact time of the raw material with the adsorbent. In all these processes, refining of hydrocarbon residues is achieved by partial thermo-destructive transformations of hydrocarbons and hetero-atomic compounds with simultaneous adsorption of the formed, on the surface of the adsorbents, resins, asphaltene and carboids, as well as metal-, sulphur-, and nitro-organic compounds. Demetallized and deasphalted light and heavy gas oils or their mixtures are a quality raw material for secondary deepening refining processes (catalytic and hydrogenation cracking, etc.), since they are characterized by low coking ability and low content of organometallic compounds that lead to irreversible deactivation of the catalysts of these deepening processes.

QSAR Studies on Ant Malarial Activity of Diverse Set of Compounds for D6 Strain of P. falciparum

2015 ◽  
Vol 6 (2) ◽  
Author(s):  
D. Thakur ◽  
Vandana Khatod ◽  
C. D. Asthana ◽  
S. Thakur
Keyword(s):  
Organic Compounds ◽  
Antimalarial Activity ◽  
Parametric Models ◽  
In Vitro Testing ◽  
Not Given ◽  
Data Set ◽  
Qsar Studies ◽  
Different Sources

Malaria spread by sporozoa of p.falciperum and is well known as an infectious lethal disease. Sometimes it causes death if the medicine is not given in time. Only a limited number of drugs can now prevent and cure malaria. For in vitro testing the clones D6 & NF54 of p. felciperum are most often used.These are resistant to present drugs like mefloquine. The data set based on the D6 strains consisting of 57 organic compounds was collected from different sources and their antimalarial activity is predicted by taking different parametric models.

Luminescent Metal-Organic Frameworks-Based Sensors for Environmentally Toxic Analytes

2021 ◽  
pp. 13-35
Author(s):  
Khemnath Patir
Keyword(s):  
Volatile Organic Compounds ◽  
Metal Ions ◽  
Organic Compounds ◽  
Metal Organic Frameworks ◽  
Toxic Metal ◽  
Structural Diversity ◽  
Detection Mechanism ◽  
Luminescent Sensors ◽  
Volatile Organic ◽  
Metal Organic

Different metal ions and anions are crucial for the life of organisms, but their excessive intake or deficiency cause various physiological abnormalities or diseases. Toxic metal ions such as Hg2+, Cr6+, Cd2+, explosive nitroaromatic compounds, and volatile organic compounds are widely used in agriculture, rocket fuels, and industry, but they cause severe effects on human health and environmental change. Hence, sensing and identification of these analytes are important for life, health, and environment protection. Recently, metal-organic frameworks (MOFs) have been extensively explored as luminescent sensors due to their unique crystallinity, structural diversity, tunable porosity, and functional groups. This chapter reviewed the origin of luminescent of MOFs and its applications as luminescent sensors for detecting different environmentally toxic analytes such as metal ions, anions, nitroexplosives, and volatile organic compounds. In addition, the detection mechanism of MOFs and its structural dependent properties are also illustrated.

scholarly journals SSH-Aerosol v1.1: A Modular Box Model to Simulate the Evolution of Primary and Secondary Aerosols

Atmosphere ◽  
2020 ◽  
Vol 11 (5) ◽  
pp. 525
Author(s):  
Karine Sartelet ◽  
Florian Couvidat ◽  
Zhizhao Wang ◽  
Cédric Flageul ◽  
Youngseob Kim
Keyword(s):  
Organic Compounds ◽  
Fine Particles ◽  
3D Models ◽  
Climate Modelling ◽  
Aerosol Dynamics ◽  
Particle Mixing ◽  
Secondary Aerosols ◽  
Ultra Fine Particles ◽  
Different Sources ◽  
Chamber Measurements

Particles are emitted by different sources and are also formed in the atmosphere. Despite the large impact of atmospheric particles on health and climate, large uncertainties remain concerning their representation in models. To reduce these uncertainties as much as possible, a representation of the main processes involved in aerosol dynamics and chemistry is necessary. For that purpose, SSH-aerosol was developed to represent the evolution of the mass and number concentrations of primary and secondary particles, across different scales, using state-of-the-art modules, taking into account processes that are usually not considered in air-quality or climate modelling. For example, the particle mixing state and the growth of ultra-fine particles are taken into account in the aerosol dynamics, the affinity of semi-volatile organic compounds with water and viscosity are taken into account in the partitioning between the gas and particle phases of organics and the formation of extremely low-volatility organic compounds from biogenic precursors is represented. SSH-aerosol is modular and can be used with different levels of complexity. It may be used as standalone to analyse chamber measurements. It is also designed to be easily coupled to 3D models, adapting the level of complexity to the spatial scale studied.

PALEOENVIRONMENT OF BROWN COAL FROM SANGATTA COAL MINES, EAST BORNEO, INDONESIA

2016 ◽  
Vol 78 (7) ◽  
Author(s):  
Yulfi Zetra ◽  
Imam B. Sosrowidjojo ◽  
R. Y. Perry Burhan
Keyword(s):  
Organic Compounds ◽  
Brown Coal ◽  
Middle Miocene ◽  
Higher Plants ◽  
Coal Mines ◽  
Bimodal Distribution ◽  
High Ratio ◽  
Aliphatic Hydrocarbon ◽  
Geochemical Studies ◽  
Different Sources

Organic geochemical studies on brown coal (lignite) located in Inul area were carried out, an area that is located in Sangatta coal mines, East Borneo, which is a part of the Balikpapan formation, aged as old as Middle Miocene to Late Miocene. Aliphatic hydrocarbon biomarker compounds which were identified by using the GC-MS analysis showed a presence of n-alkane (n-C12-n-C36) with bimodal distribution, which described the sources of organic compounds that originated from two different sources. These sources of organic compounds are phytoplankton, zooplankton and higher plants terrestrial. The Pr/Ph ratio of 1.3, the dominance of C31-homohopane and a high ratio of Tm/Ts indicated that the process of peat depositions took place in an oxic environment.  The existence of hopanoid contents showed that there were dominant activities of microbes and biolipids organic compounds such as bb-hopane and hop-17(21)-ene inside the samples of olean-12-ene and a-cadinene, which inidicated that they are organic compounds that came from higher plants such as Angiosperm and immature coals. The existence of 24-ethylcholestene and 5b-cholest-24-ene found in the coal samples, which are categorised as steranes, also indicated a low level of carbonization from the coal itself. 

scholarly journals Peculiarities of suspended matter distribution on the geochemical barrier water-atmosphere on transoceanic sections

2019 ◽  
Vol 59 (4) ◽  
pp. 558-568
Author(s):  
I. A. Nemirovskaya ◽  
A. M. Titova
Keyword(s):  
Indian Ocean ◽  
Organic Compounds ◽  
Surface Waters ◽  
Suspended Matter ◽  
Water Productivity ◽  
Biotic Factor ◽  
The Indian Ocean ◽  
High Concentrations ◽  
Different Sources ◽  
Malacca Strait

The article contains the results of the study of surface waters (31 cruise of the R/V “Akademik Nikolai Strakhov”, December 2015–January 2016) and the particle size distribution of aerosols and surface waters (42 cruise of the R/V “Akademik Boris Petrov”, January–April 2017). It was found that aerosol flows increased in arid regions of the Arabian Peninsula and the number of particles 0.3–0.5 µm decreased in the sequence (particles/l, 2017): Bab El-Mandeb Strait (135190)>Gulf of Aden (102854)>Red Sea (91612)>North, Baltic Sea (76468)>Indian Ocean (64113)>Malacca Strait (46491)>Mediterranean Sea (28397)>East Atlantic (14803). The biotic factor between the distribution of suspended matter and organic compounds prevails in the open waters of the Indian Ocean, in the northeastern part of the Atlantic Ocean, as well as in areas with increased water productivity (the Arabian Sea). Circumcontinental zonality led to the dominance of the terrigenous component in the suspension of coastal waters. The transition of the phytoplankton community from the winter (2016) to the spring (2017) led to a decrease in the suspension content, in 8 times on average. The absence of the correlation between the content of the suspension and organic compounds in some areas indicated different sources of their forming. Despite the high concentrations of hydrocarbons in individual samples in 2016 (up to 50–70 µg/l), their average content remained almost unchanged: 10.5 µg/l (2016), 8.7 µg/l (2017). The determination in the composition of hydrocarbons of weathered petroleum alkanes indicated the influence of petroleum pollutants.

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