scholarly journals Examination on Chemical Resistance Property of Ni-Sn Layers Having High Sn Content against Sodium Hypochlorite Aqueous Solutions

2021 ◽  
Vol 72 (5) ◽  
pp. 303-305
Author(s):  
Manato MIZUSHINA ◽  
Hiroki TSUNOI ◽  
Fuma ANDO ◽  
Akimasa KAWAI ◽  
Takao GUNJI ◽  
...  
Keyword(s):  
Aqueous Solutions ◽  
Sodium Hypochlorite ◽  
Chemical Resistance ◽  
Resistance Property

Potential application of manganese coated sand in the removal of Mn(II) from aqueous solutions

2007 ◽  
Vol 56 (7) ◽  
pp. 153-160 ◽  
Author(s):  
D. Tiwari ◽  
M.R. Yu ◽  
M.N. Kim ◽  
S.M. Lee ◽  
O.H. Kwon ◽  
...  
Keyword(s):  
Water Treatment ◽  
Aqueous Solutions ◽  
Manganese Dioxide ◽  
Sodium Hypochlorite ◽  
Surface Waters ◽  
Treatment Plant ◽  
Water Treatment Plant ◽  
Column Studies ◽  
Coated Sand

The aim of this study was to explore the applicability of manganese coated sand (MCS) in the presence and absence of sodium hypochlorite for the removal of Mn(II) (2 mg/L) from aqueous solutions. Sand itself is widely used as a filter media for the treatment of wastewaters and it was reported that during the treatment, Mn(II), which is present in the wastewater, is to be deposited on the surface of sand in the form of manganese dioxide. The present investigation dealt with various MCS samples, prepared in the laboratory by various doses of Mn(II) (i.e. from 0.05 to 0.2 mol/L) and the samples were obtained from the pilot plant and naturally coated in the water treatment plant for the removal of Mn(II) in the batch and column studies. Moreover, it was realised that the role of hypochlorite is multifunctional as it not only enhances the uptake of Mn(II) on the surface of MCS through oxidation of Mn(II) into Mn(IV) and hence the formation of manganese dioxide, but it was also supposed to disinfect the bacteria or harmful pathogens from the waste/surface waters. The results obtained clearly inferred that various MCS samples used for the removal of Mn(II) from aqueous solutions showed comparable removal efficiency. However, the presence of sodium hypochlorite greatly enhanced the removal of Mn(II) as more than 80% Mn(II) was removed in the presence of sodium hypochlorite at around pH 6.5. Similarly, while comparing the column data it was again noted that the breakthrough points occurred after the 4,100 and 6,500 bed volumes, respectively, in the absence and in the presence of sodium hypochlorite (2 mg/L).

scholarly journals Experimental Examination of Chemical Resistance behavior of Jute Fiber Composite

2019 ◽  
Vol 8 (4S2) ◽  
pp. 289-290
Keyword(s):  
Chemical Resistance ◽  
Natural Fiber ◽  
Fiber Composite ◽  
Fiber Reinforcement ◽  
Jute Fiber ◽  
Jute Fibers ◽  
Resistance Property ◽  
Polyester Composite ◽  
Polyester Matrix ◽  
Positive Results

This paper investigates the chemical treated fiber reinforcement effect on the chemical resistance behavior of natural fiber reinforced polyester composite. A composite material was developed with jute fiber reinforcement in the polyester matrix. Jute fiber is reinforced in three different forms namely untreated, NaOH treated and Silane treated jute fibers. The chemical resistance property of the composite was investigated as per the ASTM standard. Six different chemicals were used to investigate the chemical resistance behavior of the composite. The chemical resistance property was increased with addition of treated jute fiber. All the tested composites exhibited positive results on the chemical resistance test.

Effectiveness of Thermal Treatments and Biocides in the Inactivation of Argentinian Lactococcus lactis Phages

2002 ◽  
Vol 65 (11) ◽  
pp. 1756-1759 ◽  
Author(s):  
VIVIANA B. SUÁREZ ◽  
JORGE A. REINHEIMER
Keyword(s):  
Lactococcus Lactis ◽  
Sodium Hypochlorite ◽  
Chemical Resistance ◽  
High Titer ◽  
Skim Milk ◽  
The Other ◽  
Thermal Treatments ◽  
Viral Particles ◽  
Protective Medium ◽  
The Times

The thermal and chemical resistance levels of four autochthonal bacteriophages of Lactococcus lactis subsp. lactis, isolated from cheese processes, was investigated. The times required to obtain 99% inactivation of phages (T99) at 63 and 72°C in three suspension media (M17 broth, reconstituted commercial nonfat skim milk, and Tris magnesium gelatin buffer) were determined. Thermal resistance was dependent on the phage studied, and the results of this study demonstrate that pasteurization treatments used in dairy industries may leave viable viral particles in milk. It was possible to determine that M17 broth was generally the least protective medium, while phosphate buffer was the most protective one. Peracetic acid (0.15%, vol/vol) was the most effective viricidal agent, with exposures of 5 min being sufficient to inactivate high-titer phage suspensions (>106 PFU/ml). To achieve total inactivation (<10 PFU/ml) of viral suspensions, sodium hypochlorite was effective at 100 ppm for only two phages, while the other two phages needed concentrations of 200 and 300 ppm. Ethanol at concentrations of 100 and 75% proved to be very efficient in inactivating phages, but isopropanol was not effective against them.

A Study of Mercury Dissolution in Aqueous Solutions of Sodium Hypochlorite

2005 ◽  
Vol 78 (4) ◽  
pp. 546-548 ◽  
Author(s):  
I. P. Sizeneva ◽  
V. A. Val’tsifer ◽  
V. N. Strel’nikov
Keyword(s):  
Aqueous Solutions ◽  
Sodium Hypochlorite

EXPERIMENTS ON THE PHOTOLYSIS OF AQUEOUS SOLUTIONS OF CHLORINE, HYPOCHLOROUS ACID, AND SODIUM HYPOCHLORITE

1949 ◽  
Vol 27b (4) ◽  
pp. 318-331 ◽  
Author(s):  
K. W. Young ◽  
A. J. Allmand
Keyword(s):  
Aqueous Solutions ◽  
Quantum Efficiency ◽  
Sodium Hypochlorite ◽  
Hypochlorous Acid ◽  
Wide Range ◽  
Reaction Schemes

The photodecompositions of aqueous solutions of chlorine, hypochlorous acid, and sodium hypochlorite have been studied under a variety of conditions involving a wide range of pH, with particular attention paid to the quantum efficiency and to the proportions of the products. Reaction schemes are suggested to account for the results.

scholarly journals Sequential leaching of copper from mill tailings with aqueous solutions of hydrochloric acid and sodium hypochlorite

2021 ◽  
Vol 340 ◽  
pp. 01029
Author(s):  
Leilya Syzdykova ◽  
Nargiza Nurtazina ◽  
Aidana Erdenbekova
Keyword(s):  
Hydrochloric Acid ◽  
Aqueous Solutions ◽  
Sodium Hypochlorite ◽  
Maximum Degree ◽  
Room Temperature ◽  
Copper Extraction ◽  
Sequential Leaching ◽  
Mill Tailings ◽  
Copper Leaching ◽  
Kinetics Of

This work presents an investigation of kinetics of copper leaching from mill tailings with hydrochloric acid and sodium hypochlorite at room temperature in filtration mode. The concentration of hydrochloric acid and sodium hypochlorite varied from 0.05 to 0.5 M and 0.025 to 0.1 M respectively. When the samples were leached in the sequence of five-hour leaching with solutions of hydrochloric acid, and then six-hour with sodium hypochlorite, the maximum degree of copper extraction into the solution was 32.62 %. And in case of leaching samples in the inverse direction, with a solution of sodium hypochlorite for two hours, and then with hydrochloric acid for seven hours, 87.10 % of copper was extracted, which is 2.67 times more than in the previous case. It has been shown that the sequence of using reagents in leaching has a significant impact on the efficiency of copper extraction from the tailings.

scholarly journals Moisture Absorption and Chemical Resistance Studies on Pineapple Fiber Reinforced Vinyl Ester Composite

2019 ◽  
Vol 9 (1S4) ◽  
pp. 30-33
Keyword(s):  
Composite Material ◽  
Vinyl Ester ◽  
Fiber Length ◽  
Moisture Absorption ◽  
Chemical Resistance ◽  
Moisture Resistance ◽  
Fiber Reinforced ◽  
Resistance Property ◽  
Final Weight ◽  
Positive Results

This research discusses the moisture absorption and chemical resistance studies on pineapple fiber reinforced Vinyl ester composite. A composite material was developed with pineapple fiber as reinforcement in the Vinyl ester matrix. Pineapple fiber of three different weight percentages 30%, 40% and 50% wt as well as fiber length of 30mm, 40mm and 50mm respectively taken for the study. The moisture absorption and the chemical resistance property of the composite were investigated as per the ASTM standard. Five different chemicals were used to investigate the chemical resistance behavior of the composite. The initial and final weight loss of the composites was calculated to find the moisture resistance property. The chemical resistance property was increased with the addition of treated jute fiber. All the tested composites exhibited positive results on the chemical resistance test

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