scholarly journals Physicochemical Effects of Humid Air Treated with Infrared Radiation on Aqueous Solutions

Water ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1370
Author(s):  
Olga Yablonskaya ◽  
Vladimir Voeikov ◽  
Ekaterina Buravleva ◽  
Aleksei Trofimov ◽  
Kirill Novikov
Keyword(s):  
Water Samples ◽  
Mineral Water ◽  
Chemical Properties ◽  
Bulk Water ◽  
Humid Air ◽  
Ir Radiation ◽  
Water Properties ◽  
Hydrophilic Surfaces ◽  
First Time ◽  
Physical Signal

Water vapor absorbs well in the infrared (IR) region of the spectra. On the other hand, it was recently demonstrated that IR radiation promotes formation of the so-called exclusion zones (EZ) at the interfaces between hydrophilic surfaces and water. EZ-water properties differ significantly from that of bulk water. It was studied for the first time whether treatment of water with humid air irradiated with IR-C band could change its physical-chemical properties, making it EZ-water-like. Humid air irradiated with IR was called coherent humidity (CoHu). Redox potential and surface tension decreased in deionized water and mineral water samples that were treated with CoHu, while dielectric constant increased in such water samples. After such treatment of carbonate or phosphate buffers, their buffer capacity against acidification and leaching significantly increased. No such changes were observed in water samples treated with non-irradiated humid air. Thus, after treatment of tested aqueous systems with humid air exposed to IR radiation, their properties change, making them more like EZ-water. The results suggest that IR irradiation of humid air converts it into a carrier of a certain physical signal that affects water properties.

scholarly journals Effect of Humid Air Exposed to IR Radiation on Enzyme Activity

2022 ◽  
Vol 23 (2) ◽  
pp. 601
Author(s):  
Olga I. Yablonskaya ◽  
Vladimir L. Voeikov ◽  
Kirill N. Novikov ◽  
Ekaterina V. Buravleva ◽  
Valeriy A. Menshov ◽  
...  
Keyword(s):  
Aqueous Media ◽  
Radiant Energy ◽  
Chemical Properties ◽  
Infrared Light ◽  
Heat Inactivation ◽  
Electromagnetic Spectrum ◽  
Exclusion Zone ◽  
Humid Air ◽  
Ir Radiation ◽  
Partial Unfolding

Water vapor absorbs well in the infra-red region of the electromagnetic spectrum. Absorption of radiant energy by water or water droplets leads to formation of exclusion zone water that possesses peculiar physico-chemical properties. In the course of this study, normally functioning and damaged alkaline phosphatase, horseradish peroxidase and catalase were treated with humid air irradiated with infrared light with a wavelength in the range of 1270 nm and referred to as coherent humidity (CoHu). One-minute long treatment with CoHu helped to partially protect enzymes from heat inactivation, mixed function oxidation, and loss of activity due to partial unfolding. Authors suggest that a possible mechanism underlying the observed effects involves altering the physicochemical properties of aqueous media while treatment of the objects with CoHu where CoHu acts as an intermediary.

Investigation of Some Water Quality Parameters of Pond Water under Mymensingh Municipality

2015 ◽  
Vol 8 (1) ◽  
pp. 85-89
Author(s):  
F Zannat ◽  
MA Ali ◽  
MA Sattar
Keyword(s):  
Water Quality ◽  
Water Samples ◽  
Chemical Properties ◽  
Pond Water ◽  
Quality Parameters ◽  
Water Quality Parameters ◽  
Urban Region ◽  
Mn Toxicity ◽  
Ph Values ◽  
Drinking Water Standard

A study was conducted to evaluate the water quality parameters of pond water at Mymensingh Urban region. The water samples were collected from 30 ponds located at Mymensingh Urban Region during August to October 2010. The chemical analyses of water samples included pH, EC, Na, K, Ca, S, Mn and As were done by standard methods. The chemical properties in pond water were found pH 6.68 to 7.14, EC 227 to 700 ?Scm-1, Na 15.57 to 36.00 ppm, K 3.83 to 16.16 ppm, Ca 2.01 to 7.29 ppm, S 1.61 to 4.67 ppm, Mn 0.33 to 0.684 ppm and As 0.0011 to 0.0059 ppm. The pH values of water samples revealed that water samples were acidic to slightly alkaline in nature. The EC value revealed that water samples were medium salinity except one sample and also good for irrigation. According to drinking water standard Mn toxicity was detected in pond water. Considering Na, Ca and S ions pond water was safe for irrigation and aquaculture. In case of K ion, all the samples were suitable for irrigation but unsuitable for aquaculture.J. Environ. Sci. & Natural Resources, 8(1): 85-89 2015

Chlorinated Organics in Nearshore Waters and Tributaries of the St. Clair River

1986 ◽  
Vol 21 (3) ◽  
pp. 344-350 ◽  
Author(s):  
Barry G. Oliver ◽  
Klaus L.E. Kaiser
Keyword(s):  
United States ◽  
Suspended Sediment ◽  
Waste Disposal ◽  
Large Volume ◽  
Water Samples ◽  
Chemical Properties ◽  
Low Level ◽  
Chemical Company ◽  
Physical Chemical ◽  
The Individual

Abstract The concent rat ions of hexachloroethane (HCE), hexachlorobutadiene (HCBD), pentachlorobenzene (QCB), hexachlorobenzene (HCB) and octachlorostyrene (OCS) in large volume water samples show that the major sources of these chemicals to the St. Clair River are Dow Chemical Company effluents and, to a lesser degree, Sarnia’s Township ditch which drains one of Dow’s waste disposal sites. Tributaries entering the river on both sides of the Canada/United States border contain measurable concentrations of these chemicals indicating low level contamination throughout the area. The degree of water/suspended sediment partitioning of the chemicals (Kp) was studied. Kp values for the individual chemicals changed in a manner consistent with changes in their physical-chemical properties.

scholarly journals Yeasts and filamentous fungi in bottled mineral water and tap water from municipal supplies

2007 ◽  
Vol 50 (1) ◽  
pp. 1-9 ◽  
Author(s):  
Mirian Ueda Yamaguchi ◽  
Rita de Cássia Pontello Rampazzo ◽  
Sueli Fumie Yamada-Ogatta ◽  
Celso Vataru Nakamura ◽  
Tânia Ueda-Nakamura ◽  
...  
Keyword(s):  
Filamentous Fungi ◽  
Water Samples ◽  
Mineral Water ◽  
Tap Water ◽  
Health Hazard ◽  
Total Coliform ◽  
Species Level ◽  
Potential Health ◽  
Potential Health Hazard ◽  
Bottled Mineral Water

The main objective of this study was to analyse the occurrence of yeasts and filamentous fungi in drinking water as well as to investigate their correlation with the indicator bacteria of faecal pollution. Yeasts were detected in 36.6% and 11.6% of the bottled mineral on water dispensers and tap water samples from municipal system, respectively. Twenty-one (35.0%) of bottled mineral water and two (3.3%) of tap water samples were positive for filamentous fungi. For bottled mineral water 12 (20.0%) of 60 samples were positive for total coliform, compared with 3(5.0%)out of 60 samples from tap water. The mineral water from dispensers was more contaminated than tap water. Strains belonging to the genera Candida identified to the species level were C. parapsilosis, C. glabrata and C. albicans. Thus, bottled mineral water from water dispensers and tap water could be considered a possible transmission route for filamentous fungi and yeasts, and could constitute a potential health hazard, mainly to immunocompromised indivuals.

scholarly journals Magnetic solid phase extraction with octahedral structured Fe3O4@SiO2@polydimethylsiloxane magnetic nanoparticles as the sorbent for determining benzene, toluene, ethylbenzene and xylenes in water samples

RSC Advances ◽  
2017 ◽  
Vol 7 (66) ◽  
pp. 41862-41868 ◽  
Author(s):  
Maosheng Zhang ◽  
Guobin Huang ◽  
Jiarong Huang ◽  
Ling Zhong ◽  
Weilan Chen
Keyword(s):  
Magnetic Nanoparticles ◽  
Solid Phase Extraction ◽  
Water Samples ◽  
Solid Phase ◽  
Magnetic Solid Phase Extraction ◽  
Phase Extraction ◽  
Benzene Toluene ◽  
Magnetic Solid ◽  
First Time

Novel octahedral structured Fe3O4@SiO2@polydimethylsiloxane magnetic nanoparticles (Fe3O4@SiO2@PDMS MNPs) have been successfully synthesized for the first time.

scholarly journals Controlling Condensation of Water Using Hybrid Hydrophobic-Hydrophilic Surfaces

2010 ◽  
Author(s):  
Kripa K. Varanasi ◽  
Tao Deng
Keyword(s):  
Nucleation Rate ◽  
Heterogeneous Nucleation ◽  
Energy Barrier ◽  
Superhydrophobic Surfaces ◽  
Industrial Processes ◽  
Spatial Control ◽  
Hydrophilic Surfaces ◽  
Wide Range ◽  
First Time ◽  
Control Water

Heterogeneous nucleation of water plays an important role in wide range of natural and industrial processes. Though heterogeneous nucleation of water is ubiquitous and everyday experience, spatial control of this important phenomenon is extremely difficult. Here we show, for the first time, that spatial control in the heterogeneous nucleation of water can be achieved by manipulating the local nucleation energy barrier and nucleation rate via the modification of the local intrinsic wettability of a surface by patterning hybrid hydrophobic-hydrophilic regions on a surface. Such ability to control water nucleation could address the condensation-related limitations of superhydrophobic surfaces, and has implications for efficiency enhancements in energy and desalination systems.

scholarly journals Evaluation of Minerals Content of Drinking Water in Malaysia

2012 ◽  
Vol 2012 ◽  
pp. 1-10 ◽  
Author(s):  
Azrina Azlan ◽  
Hock Eng Khoo ◽  
Mohd Aizat Idris ◽  
Amin Ismail ◽  
Muhammad Rizal Razman
Keyword(s):  
Drinking Water ◽  
Water Samples ◽  
Mineral Water ◽  
Tap Water ◽  
Fluoride Concentration ◽  
Daily Intake ◽  
Peninsular Malaysia ◽  
Mineral Water Sample ◽  
Geographical Locations ◽  
Iron And Manganese

The drinking and mineral water samples obtained from different geographical locations had concentrations of the selected minerals lower than the standard limits, except for manganese, arsenic, and fluoride. The concentrations of manganese and arsenic in two mineral water samples were slightly higher than the standard international recommended limits. One mineral water sample had a fluoride concentration higher than the standard limits, whereas manganese was not detected in nine drinking and mineral water samples. Most of the selected minerals found in the tap water samples were below the international standard limits, except for iron and manganese. The concentrations of iron and manganese in the tap water samples were higher than the standard limits, which were obtained from one and three of the studied locations, respectively. The potable water obtained from various manufacturers and locations in Peninsular Malaysia is safe for consumption, as the minerals concentrations were below the standard limits prescribed by the Malaysian Food Regulations of 1985. The data obtained may also provide important information related to daily intake of these minerals from drinking water.

scholarly journals Fast UHPLC-MS/MS for the Simultaneous Determination of Azithromycin, Erythromycin, Fluoxetine and Sotalol in Surface Water Samples

2021 ◽  
Vol 11 (18) ◽  
pp. 8316
Author(s):  
Mira Azzi ◽  
Sylvain Ravier ◽  
Assem Elkak ◽  
Bruno Coulomb ◽  
Jean-Luc Boudenne
Keyword(s):  
Surface Water ◽  
Simultaneous Determination ◽  
Surface Waters ◽  
Water Samples ◽  
High Performance ◽  
Chemical Properties ◽  
Environmental Water ◽  
Butyl Ether ◽  
Flight Mass Spectrometry

Chromatographic development for the determination of pharmaceuticals in environmental water samples is particularly challenging when the analytes have significantly different physico-chemical properties (solubility, polarity, pKa) often requiring multiple chromatographic methods for each active component. This paper presents a method for the simultaneous determination of azithromycin, erythromycin (antibiotics), fluoxetine (anti-depressant) and sotalol (b-blocker) in surface waters by ultra-high-performance liquid chromatography coupled with ultra-high-resolution time-of-flight mass spectrometry. These pharmaceuticals—presenting a broad spectrum of polarity (0.24 ≤ log Kow ≤ 4.05)—were separated on a C-18 analytical column, after a simple filtration step for freshwater samples or after a liquid–liquid extraction with Methyl-tertio-butyl ether (MTBE) for seawater samples. The optimized separation method (in terms of nature of column and eluent, elution gradient, and of mass spectrometric parameters), enable one to reach limits of detection ranging between 2 and 7 ng L−1 and limits of quantification between 7 and 23 ng L−1 for the four targeted molecules, within a three minute run. This method was validated using samples collected from three different surface waters in Lebanon (freshwater and seawater) and analytical results were compared with those obtained in surface waters sampled in a French river, equivalent in terms of human activities. Using this method, we report the highest concentration of pharmaceuticals found in surface water (up to 377 ng L−1 and 268 ng L−1, respectively, for azithromycin and erythromycin, in the Litani river, Lebanon).

scholarly journals Effect of exposure of African catfish (Clarias batrachus) to magnetic field on water properties and egg hatching

2018 ◽  
Vol 2 ◽  
pp. 54-59
Author(s):  
Sadam Mohamad Hassan ◽  
Ridzwan A. Rahman ◽  
Rezuan H. Kamaruddin ◽  
Najilaa S. Madlul
Keyword(s):  
Magnetic Field ◽  
Clarias Gariepinus ◽  
Chemical Properties ◽  
Biological Properties ◽  
Specific Conductance ◽  
African Catfish ◽  
Field Exposure ◽  
Egg Hatching ◽  
Magnetic Devices ◽  
Water Properties

Magnetic water is produced when water is passed through a magnetic field with the purpose of modifying its structure. The changes in physical and chemical properties of magnetised water affect the biological properties of the organisms. The magnetic field can affect the growth of fish from the embryo to the adult stage. The present study evaluates the effects of magnetic field exposure on water properties and hatchability of the eggs of African catfish (Clarias gariepinus). Water was passed through magnetic devices of different intensities; namely: 0.10, 0.15 and 0.20 Tesla. The dissolved oxygen (mgL-1) and pH levels were found to significantly (P ≤ 0.05) increase from 5.92 mgL-1 to 6.33 mgL-1, and from 8.03 to 8.19, respectively. Ammonium (NH4-N mgL-1) level declined significantly (P ≤ 0.05) (0.20 mgL-1 to 0.16 mgL-1). Salinity (ppt), conductivity (uscm-1), specific conductance (uscm-1) and total dissolved solids (mgL-1) also decreased after magnetization. Significant increase in the rate of hatching was attained in water exposed to a magnetic field of 0.10, 0.15 and 0.20 T. The study demonstrated the benefits of using magnetic devices that are simple, practical and cost-effective.

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