Physical-chemical study, characterisation and use of image analysis to assess the durability of earthen plasters exposed to rain water and acid rain

2018 ◽  
Vol 187 ◽  
pp. 708-717 ◽  
Author(s):  
Victoria E. García-Vera ◽  
Marcos Lanzón
Keyword(s):  
Image Analysis ◽  
Acid Rain ◽  
Chemical Study ◽  
Rain Water ◽  
Physical Chemical

scholarly journals SYNTHESIS AND PHYSICAL-CHEMICAL STUDY OF ORGANOBENTONITE-BASED NANOCOMPOSITES

2020 ◽  
Vol 18 (1) ◽  
pp. 55-60
Author(s):  
S.A. Mammadova ◽  
◽  
U.A. Mammadova ◽  
D.B. Tagiyev ◽  
N.A. Zeynalov ◽  
...  
Keyword(s):  
Chemical Study ◽  
Physical Chemical

Copper Catalyzed Autoxidation of Sulphur Dioxide and Inhibition by Methanoic Acid

2020 ◽  
Vol 10 (1) ◽  
pp. 33-46
Author(s):  
Arun Kumar Sharma ◽  
Devarkonda Satay Narayan Prasad
Keyword(s):  
Acid Rain ◽  
Atmospheric Chemistry ◽  
Harmful Effect ◽  
Frequency Factor ◽  
Rain Water ◽  
Radical Mechanism ◽  
Gravimetric Analysis ◽  
Free Radical Mechanism ◽  
Organic Inhibitors ◽  
Methanoic Acid

Background:: Today, acid rain problem is one of the serious global problems to the environment in which pH of the rain water decreases, causing harmful effect to nature, buildings, monuments, vegetation and human being as well. Therefore, the objective of the paper to find out some organic inhibitors present in the atmosphere that inhibited the acid rain. Objective:: In this paper, we studied the chemistry of Cu (II)-methanoic acid-S(IV)-O2 in acetate buffered medium by earlier reported methods in literature. Gravimetric analysis was carried out to find the end product and confirmed that it was sulphate with 98 % recovery. Methods:: Experiments were carried out at 303 ≤ T/K ≤ 313, 4.0 ≤ pH ≤ 5.35, 1.0×10−3 mol/dm3 ≤ S(IV) ≤ 10.0×10−3 mol/dm3, 5×10−6 mol/dm3 ≤ [Cu(II)] ≤ 2.5×10−5 mol/dm3, 6×10−6 mol/dm3≤[methanoic acid]≤7×10-4 mol/dm3. The value of apparent activation energy and inhibition parameter B was calculated in the presence of methanoic acid found as 29.07 kJ mol-1and 3.18 x 103 mol dm-3, respectively. The thermodynamic parameters were found as frequency factor (1.59 x 10-6s-1), entropy (-358.92 J K-1 mol-1), enthalpy (20.97 k J mol-1), and Gibbs free energy (172.83k J mol-1), respectively. Results:: We observed that methanoic acid acts as an inhibitor in copper catalyzed autoxidation of SO2 in acidic medium. Therefore, on the basis of the observed results a free radical mechanism has been identified. The results are useful for modeling rain water acidity and therefore a great use of meteorology and atmospheric chemistry. This study is important in understanding the mechanism of the oxidation of S(IV) by O2. Conclusion:: This study suggests that since organic inhibitors are found in the atmosphere, their concentrations and their influence on the oxidation of aqueous SO2 should be taken into account. The intervention of methanoic acid in the autoxidation of aqueous SO2 plays a role in deciding the fate of both methanoic acid and SO2. The influence of inhibitors may be used to calculate the lifetime of SO2, Methanoic acid has high values of kinh and, therefore, it would be degraded by sulfate radical anions in atmospheric waters.

Kinetic and physical-chemical study of the inclusion complex of β-cyclodextrin containing carvacrol

2016 ◽  
Vol 1125 ◽  
pp. 323-330 ◽  
Author(s):  
Paula dos Passos Menezes ◽  
Mairim Russo Serafini ◽  
Yasmim Maria Barbosa Gomes de Carvalho ◽  
Dayanne Valéria Soares Santana ◽  
Bruno Santos Lima ◽  
...  
Keyword(s):  
Inclusion Complex ◽  
Chemical Study ◽  
Physical Chemical

ChemInform Abstract: A Physical Chemical Study of Vanadium(IV) Oxide Perrhenate.

ChemInform ◽  
1987 ◽  
Vol 18 (22) ◽  
Author(s):  
L. L. ZAITSEVA ◽  
A. A. CHIZHOV
Keyword(s):  
Chemical Study ◽  
Physical Chemical

ChemInform Abstract: Physical Chemical Study of Strontium Hexachlorotechnetate.

ChemInform ◽  
1987 ◽  
Vol 18 (22) ◽  
Author(s):  
L. L. ZAITSEVA ◽  
A. A. KRUGLOV ◽  
AN. S. KOSTYUKOV ◽  
E. G. TETERIN
Keyword(s):  
Chemical Study ◽  
Physical Chemical

scholarly journals Studies on acid rain and snow. I. Analysis of rain water chemistry by interrelationship of inorganic components.

Eisei kagaku ◽  
1990 ◽  
Vol 36 (6) ◽  
pp. 480-490
Author(s):  
EIJI HIRAI ◽  
MOTOICHI MIYAZAKI ◽  
TETSUJI CHOHJI ◽  
MORITUGU KITAMURA ◽  
NOBORU OKUBO ◽  
...  
Keyword(s):  
Water Chemistry ◽  
Acid Rain ◽  
Rain Water ◽  
Inorganic Components

scholarly journals A PHYSICAL-CHEMICAL STUDY OF THE FLUSHING OF THE SANTA BARBARA BASIN1

1971 ◽  
Vol 16 (3) ◽  
pp. 479-489 ◽  
Author(s):  
Edward R. Sholkovitz ◽  
Joris M. Gieskes
Keyword(s):  
Chemical Study ◽  
Santa Barbara ◽  
Physical Chemical

Extracts from the Scientific and Technical Press

1927 ◽  
Vol 31 (197) ◽  
pp. 445-473
Author(s):  
R.T.P.
Keyword(s):  
Aromatic Compounds ◽  
Test Bench ◽  
Chemical Study ◽  
Optical Methods ◽  
Physical Chemical ◽  
Method Of Determination ◽  
Systematic Determination ◽  
Cyclic Compounds ◽  
High Latent Heat

Physical–chemical study of light fuels and of lubricants in Aeronautics. (M. Moutte, La Technique Aeronautique, Sept.–Oct., 1926, pp. 279-281 and 305-319) (8.51/5096 France)Systematic tests of fuels in an engine on the test bench were commenced in 1917, in conjunction with a systematic determination of physical properties, and as far as possible of chemical composition. It was found that homogeneity, volatility and high latent heat of evaporisation were the most desirable qualities. In agreement with Ricardo, the aromatic compounds of hydrogen are found to be the least amenable to propagation of explosion, then the saturated cyclic compounds, and lastly the saturated acyclic compounds. In identifying fuels use is made of characteristic curves of distillation:—Temperature—Volume Distilled, Density;—Volume Distilled.Temperature—Density, Temperature—Solubility.Temperature of distillation plotted against critical temperature of solubility in aniline gives highly characteristic differences, and is considered a fundamental method. Optical methods are also used for approximate quantitative determination. The formation of clouds of condensed drops affords another method of determination. The mechanical conditions were also examined:—Variation of inlet pressure, condensation, centrifugal separation.

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