Contamination of drinking water soon after cement mortar

Leave Comment

Contamination of drinking water soon after cement mortar ...

04/05/2019  The results of the experiments performed showed that independently of the concentration of sodium hypochlorite in water, rapid changes of water pH soon after cement mortar lining renovation may always be expected. The addition of disinfectant to water causes an increase in pollutants leaching from cement coatings, even in the case of a low disinfectant dose. Although the concentration of ...

Get price

Contamination of drinking water soon after cement mortar ...

Contamination of drinking water soon after cement mortar lining renovation depending on the disinfectant doses ... cement mortar until the ion balance between the water phase and the cement

Get price

Contamination of drinking water soon after cement mortar ...

showed that independently of the concentration of sodium hypochlorite in wat er, rapid changes of water pH soon after cement mortar lining renovation may always be expected. The addition of...

Get price

Contamination of drinking water soon after cement mortar ...

However, simultaneously, the presence of disinfectant in water may cause some problems. The results of the experiments performed showed that independently of the concentration of sodium hypochlorite in water, rapid changes of water pH soon after cement mortar lining renovation may always be expected. The addition of disinfectant to water causes ...

Get price

Contamination of Drinking Water Soon after Cement Mortar ...

Skip to main content. LOGIN / REGISTER ; GET A LIBRARY CARD ; DONATE ; SEARCH . The whole site ; elibrary only

Get price

Contamination of drinking water soon after cement mortar ...

However, simultaneously, the presence of disinfectant in water may cause some problems. The results of the experiments performed showed that independently of the concentration of sodium hypochlorite in water, rapid changes of water pH soon after cement mortar lining renovation may always be expected. The addition of disinfectant to water causes ...

Get price

Assets - RightsPlatform

Description Total amounts of leached elements from cement coatings into different water types noted at the end of 64-day investigation period Article Title: Contamination of drinking water soon after cement mortar lining renovation depending on the disinfectant doses Publication Title: SN Applied Sciences

Get price

Decontamination of Drinking Water Infrastructure ...

More of the disinfectant treatments on contaminated cement-mortar coupons reduced spores to undetectable levels than on iron. However, after 6 hours of treatment, chlorine dioxide (25 mg/L) did reduce spores to undetectable levels on iron coupons. Acidified nitrite (pH 2, 0.1 mol/L) was the only tested disinfectant that performed better on iron coupons than on cement-mortar. There were ...

Get price

Decontamination of Drinking Water Infrastructure A ...

Drinking water infrastructure is commonly lined with cement-mortar, which is a mixture of Portland cement and sand. Portland cement is largely calcium oxide and sand is silicon dioxide, which is a component of many clays. Cement-mortar can also have precipitated calcium carbonate (calcite). As with iron oxides, data shows that strontium combining with carbonate will precipitate onto the ...

Get price

Experimental research on deterioration of drinking water ...

In the paper the results of experimental research on the deterioration of drinking water quality after cement mortar lining were presented. The experiments were conducted in the renovated water pipeline section in Cracow. Based on the results, the expected degree of leaching of the pollutants from cement mortar to drinking water for specified lengths and diameters of renovated pipes, as well ...

Get price

Decontamination of Drinking Water Distribution System ...

diameter cement-mortar-lined ductile iron drinking water distribution pipe that had previously been taken out of service. The pipe was exhumed from the INL grounds and oriented in the shape of a small (450 feet long) drinking water distribution system. The WSTB can support drinking water distribution system research on a variety of topics, including biofilms, water quality, sensors, and ...

Get price

Persistence and Decontamination of Radioactive Cesium-137 ...

cement-mortar, which are materials commonly used in home plumbing (copper and PVC) and drinking water distribution pipes (cement-mortar lined iron). Decontamination of Cs-137 is also examined using flushing with clean water, followed by pipe cleaning with 1 M ammonium chloride (NH 4 Cl) or 1 M potassium chloride (KCl).

Get price

12. CHEMICAL FACT SHEETS - WHO

in surface water. Ammonia contamination can also arise from cement mortar pipe. GUIDELINES FOR DRINKING-WATER QUALITY 304 linings. Ammonia in water is an indicator of possible bacterial, sewage and animal waste pollution. Ammonia is a major component of the metabolism of mammals. Exposure from environmental sources is insignificant in comparison with endogenous synthesis of

Get price

Radiological Contaminant Persistence and Decontamination ...

potential for contamination of water infrastructure with radiological contaminants is one area of concern. Previous to this study, EPA’s Persistence and Decontamination Experimental Design Protocol (PDEDP), a procedure to quantitatively determine the persistence of contaminants on various drinking water pipe materials, had been developed. The objective of this project was to test the PDEDP ...

Get price

eLCOSH : Cement Hazards and Controls Health Risks and ...

Skin contaminated with wet or dry cement should be washed with cold running water as soon as possible. Open sores or cuts should be thoroughly flushed and covered with suitable dressings. Get medical attention if discomfort persists. Contaminated eyes should be washed with cold tap water for at least 15 minutes before the affected person is taken to hospital.

Get price

Decontamination of Drinking Water Infrastructure ...

More of the disinfectant treatments on contaminated cement-mortar coupons reduced spores to undetectable levels than on iron. However, after 6 hours of treatment, chlorine dioxide (25 mg/L) did reduce spores to undetectable levels on iron coupons. Acidified nitrite (pH 2, 0.1 mol/L) was the only tested disinfectant that performed better on iron coupons than on cement-mortar. There were ...

Get price

Decontamination of biological agents from drinking water ...

Decontamination options for drinking water infrastructure have been explored for some biological agents, but data gaps remain. Data on bacterial spore persistence on common water infrastructure materials such as iron and cement-mortar lined iron show that spores can be persistent for weeks after contamination. Decontamination data show that ...

Get price

Decontamination of Drinking Water Distribution System ...

diameter cement-mortar-lined ductile iron drinking water distribution pipe that had previously been taken out of service. The pipe was exhumed from the INL grounds and oriented in the shape of a small (450 feet long) drinking water distribution system. The WSTB can support drinking water distribution system research on a variety of topics, including biofilms, water quality, sensors, and ...

Get price

Decontamination of Drinking Water Infrastructure A ...

Drinking water infrastructure is commonly lined with cement-mortar, which is a mixture of Portland cement and sand. Portland cement is largely calcium oxide and sand is silicon dioxide, which is a component of many clays. Cement-mortar can also have precipitated calcium carbonate (calcite). As with iron oxides, data shows that strontium combining with carbonate will precipitate onto the ...

Get price

Persistence and Decontamination of Radioactive Cesium-137 ...

cement-mortar, which are materials commonly used in home plumbing (copper and PVC) and drinking water distribution pipes (cement-mortar lined iron). Decontamination of Cs-137 is also examined using flushing with clean water, followed by pipe cleaning with 1 M ammonium chloride (NH 4 Cl) or 1 M potassium chloride (KCl).

Get price

Effect of cement paste on drinking water Semantic Scholar

When water conduits are made of concrete or are lined with cement mortar, the cement paste can be leached by water. This occurs to a significant degree if the water remains in prolonged contact with the cement paste. The consequences of leaching are an increase in pH and in the content of CaCO3. Recent rules of the European Union endeavour to deal with this problem.As the tolerable amount of ...

Get price

12. CHEMICAL FACT SHEETS - WHO

in surface water. Ammonia contamination can also arise from cement mortar pipe. GUIDELINES FOR DRINKING-WATER QUALITY 304 linings. Ammonia in water is an indicator of possible bacterial, sewage and animal waste pollution. Ammonia is a major component of the metabolism of mammals. Exposure from environmental sources is insignificant in comparison with endogenous synthesis of

Get price

Evaluating the cement stabilization of arsenic-bearing ...

30/12/2015  1. Introduction. Worldwide contamination of drinking water by arsenic has spurred the development and implementation of numerous arsenic-removal technologies, many of which rely on the sorption of arsenic to oxidized iron solids , , , , , .The resulting arsenic-bearing iron solid waste can become a new source of arsenic contamination depending on the disposal environment.

Get price

Radiological Contaminant Persistence and Decontamination ...

potential for contamination of water infrastructure with radiological contaminants is one area of concern. Previous to this study, EPA’s Persistence and Decontamination Experimental Design Protocol (PDEDP), a procedure to quantitatively determine the persistence of contaminants on various drinking water pipe materials, had been developed. The objective of this project was to test the PDEDP ...

Get price

Effect of Water Impurities on Concrete Strength ...

The concrete of very lower water/cement ratio facilitates this requirement of sulfate resistance. The salt content in sea water reduces the concrete strength by an amount of 10 to 20 percent. More than strength factor, the corrosion of the reinforcement is considered as the adverse effect. The chlorides are the main cause of corrosion. The risk of reinforcement corrosion is higher when it is ...

Get price
Contact us

Submit online

Please leave a message below and we will contact you as soon as possible.