Safety and Influence of Molecular Hydrogen/Carbon Dioxide Contained Drinking Water on Common Anthropometric and Laboratory Parameters.

The photocatalytic decomposition of aqueous acetic acid into molecular hydrogen, carbon dioxide, and hydrocarbons employing platinized titania (Pt/TiO2) as a photocatalyst has been studied.

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ChemInform Abstract: Direct Methylation of Amines with Carbon Dioxide and Molecular Hydrogen Using Supported Gold Catalysts.

ChemInform ◽

10.1002/chin.201609056 ◽

2016 ◽

Vol 47 (9) ◽

pp. no-no

Author(s):

Xian-Long Du ◽

Gao Tang ◽

Hong-Liang Bao ◽

Zheng Jiang ◽

Xin-Hua Zhong ◽

...

Keyword(s):

Carbon Dioxide ◽

Molecular Hydrogen ◽

Gold Catalysts ◽

Supported Gold Catalysts ◽

Supported Gold

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Estimation and impact of carbon dioxide capture on drinking water: Tillmans equilibrium diagram

Journal of Water and Climate Change ◽

10.2166/wcc.2019.038 ◽

2019 ◽

Vol 11 (2) ◽

pp. 380-389

Author(s):

C. Alvarez-Bastida ◽

M. Solache-Ríos ◽

I. Linares-Hernández ◽

G. Vázquez-Mejía ◽

G. Fonseca-Montes de Oca ◽

...

Keyword(s):

Carbon Dioxide ◽

Drinking Water ◽

Carbonic Acid ◽

Carbon Dioxide Capture ◽

Equilibrium Diagram ◽

Cation Composition ◽

Bicarbonate Ions ◽

Different Seasons ◽

User Friendly ◽

The Impact

Abstract The increase of CO2 in the atmosphere may produce some effects on drinking water because water tends to naturally capture CO2 species. The main purpose was the study of the impact of capture of free CO2 and its transformation to carbonic acid (H2CO3) and bicarbonate ions (HCO−3). The study used a Tillmans equilibrium diagram obtained from the modified Mojmir Mach model as a function of water temperature and considered the effects on anion and cation composition. Three wells located in different zones were selected, with similar characteristics (capture of CO2). Samples were taken in different seasons of the year and the amount of CO2 in the drinking water was calculated. It was found that with increasing concentrations of free CO2 the pH decreases, and this process makes the water acid and susceptible to dissolve some elements (Ca, Na, K, Si) and other species (HCO−3). The capture of CO2 has important effects on the anion and cation composition of drinking water and on the variation of pH by more than one unit, which may affect the health of consumers. The method presented in this study is an excellent user-friendly alternative to determine the impact of natural capture of total CO2 by water.

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Reduction of carbon dioxide by molecular hydrogen in the presence of complexes of the transition metals

Bulletin of the Academy of Sciences of the USSR Division of Chemical Science ◽

10.1007/bf00855315 ◽

1972 ◽

Vol 21 (10) ◽

pp. 2263-2264 ◽

Cited By ~ 2

Author(s):

I. S. Kolornnikov ◽

T. S. Lobeeva ◽

M. E. Vol'pin

Keyword(s):

Carbon Dioxide ◽

Transition Metals ◽

Molecular Hydrogen

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Biotransformation of N-Nitrosodimethylamine by Pseudomonas mendocina KR1

Applied and Environmental Microbiology ◽

10.1128/aem.01535-06 ◽

2006 ◽

Vol 72 (10) ◽

pp. 6693-6698 ◽

Cited By ~ 36

Author(s):

Diane Fournier ◽

Jalal Hawari ◽

Sheryl H. Streger ◽

Kevin McClay ◽

Paul B. Hatzinger

Keyword(s):

Carbon Dioxide ◽

Drinking Water ◽

Trace Amount ◽

Mammalian Cells ◽

Microbial Transformation ◽

Degradation Process ◽

Initial Reaction ◽

Emerging Contaminant ◽

Pseudomonas Mendocina ◽

Potent Carcinogen

ABSTRACT N-Nitrosodimethylamine (NDMA) is a potent carcinogen and an emerging contaminant in groundwater and drinking water. The metabolism of NDMA in mammalian cells has been widely studied, but little information is available concerning the microbial transformation of this compound. The objective of this study was to elucidate the pathway(s) of NDMA biotransformation by Pseudomonas mendocina KR1, a strain that possesses toluene-4-monooxygenase (T4MO). P. mendocina KR1 was observed to initially oxidize NDMA to N-nitrodimethylamine (NTDMA), a novel metabolite. The use of 18O2 and H2 18O revealed that the oxygen added to NDMA to produce NTDMA was derived from atmospheric O2. Experiments performed with a pseudomonad expressing cloned T4MO confirmed that T4MO catalyzes this initial reaction. The NTDMA produced by P. mendocina KR1 did not accumulate, but rather it was metabolized further to produce N-nitromethylamine (88 to 94% recovery) and a trace amount of formaldehyde (HCHO). Small quantities of methanol (CH3OH) were also detected when the strain was incubated with NDMA but not during incubation with either NTDMA or HCHO. The formation of methanol is hypothesized to occur via a second, minor pathway mediated by an initial α-hydroxylation of the nitrosamine. Strain KR1 did not grow on NDMA or mineralize significant quantities of the compound to carbon dioxide, suggesting that the degradation process is cometabolic.

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Studies on salt tolerance of sheep. V. The tolerance of sheep for mixtures of sodium chloride, sodium carbonate, and sodium bicarbonate in the drinking water

Australian Journal of Agricultural Research ◽

10.1071/ar9630815 ◽

1963 ◽

Vol 14 (6) ◽

pp. 815 ◽

Cited By ~ 10

Author(s):

AW Peirce

Keyword(s):

Carbon Dioxide ◽

Drinking Water ◽

Sodium Chloride ◽

Rain Water ◽

Control Group ◽

Health Food ◽

Water Control ◽

Entire Experiment ◽

Daily Intakes ◽

Saline Solutions

Six groups, each of six sheep, were fed in pens for 15 months on a ration of chaffed lucerne and wheaten hays. One group was offered rain-water to drink, another group was offered 1.30% sodium chloride, whereas the others were offered one of the following mixtures of sodium chloride, carbonate, and bicarbonate: 1.26 + 0.015 + 0.025, 1.21 + 0.04 + 0.06, 1.12 + 0.08 + 0.13, and 0.95 + 0.161+ 0.25%. The intake of all saline solutions was higher than that of rain-water, ranging from 150% above for 1.30% sodium chloride to 60% above for the highest level of carbonates; the mean daily intakes for the entire experiment by the six groups were 2.6, 6.6, 4.8, 5.7, 5.8, and 4.2 l. respectively. The intake also increased in all groups with temperature, being 40–70% higher in the hottest months than in the coldest months.Weight increase was less from 6 months onward in the group receiving 1.30% sodium chloride, and was less at certain times only in the experiment in the groups receiving 0.04 or 0.10% carbonates, than in that receiving rain-water (control group). There were no differences in weight increase between the control group and the groups receiving the highest concentrations (0.21 and 0.41%) of carbonates The saline drinking waters had no effect on the concentrations of sodium, potassium, calcium, magnesium, or chloride in the blood plasma. The concentration of carbon dioxide was higher, for the last year of the experiment, in the blood of the control group, and, for approximately one-third of the experiment, in that of the group receiving the highest level of carbonates in its drinking water, than in that of any of the groups receiving lower levels of carbonates. There were differences in blood carbon dioxide on one occasion only between the control group and that receiving the highest level of carbonates. None of the solutions used in the experiment had any adverse effect on the general health, food consumption or wool production of the sheep.

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