Microbiologically induced corrosion of copper pipes in low-pH water

Reyes, Arturo; Letelier, María Victoria; Iglesia, Rodrigo De la; González, Bernardo; Lagos, Gustavo

doi:10.1016/j.ibiod.2007.06.001

Cited by 59 publications

(34 citation statements)

References 16 publications

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“…The preeminence of copper pipes and fixtures in the United States and much of the rest of the developed world has made meeting the AL an important and necessary requirement. The extent to which copper leaches from pipes and fixtures into drinking water depends upon several physical and chemical conditions, including temperature, total organic carbon, dissolved inorganic carbon (DIC), and chloride (Boulay & Edwards ); sulfate, polyphosphate, and orthophosphate (Schock et al ); the age of the copper pipes in the system (Edwards et al , Lagos et al ); microbial activity (Reyes et al ); disinfectant type (Boyd et al ); water stagnation time (Merkel et al ); and other factors. The mechanism by which these parameters impact copper varies, but in many cases, a mineralogical change that affects copper solubility or equilibrium conditions occurs.…”

Section: Some Copper Phosphate Mineral Speciesmentioning

confidence: 99%

A Model for Estimating the Impact of Orthophosphate on Copper in Water

et al. 2018

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The nature of copper phosphate minerals in drinking water distribution systems has remained largely unsolved despite being an important link to reducing cuprosolvency. Chemical equilibrium modeling has also largely failed to accurately predict soluble copper in the presence of orthophosphate. The objective of this work was to develop and validate an empirical copper solubility model that considered pH, dissolved inorganic carbon (DIC), and orthophosphate from a series of bench-scale copper precipitation experiments. An empirical model was constructed that allows for the determination of copper levels in a system given pH, DIC, and orthophosphate data. The predictive reliability of this model was assessed by evaluating a collection of cuprosolvency data from two decades of research and field observations and water treatment reports. The tests yielded a firm correlation between predicted and observed copper levels attested by a regression coefficient of 0.86 for a total of 851 observations.

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Section: Some Copper Phosphate Mineral Speciesmentioning

confidence: 99%

A Model for Estimating the Impact of Orthophosphate on Copper in Water

et al. 2018

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“…For example, drinking water isolates of the genera Agrobacterium, Acidovorax, Sphingomonas, and Micrococcus have been reported to increase copper levels in drinking water pipes, with corrosion dependent on microbial activity (9,10,14,23,37). In other studies, Rhodococcus, Stenotrophomonas, and Xanthomonas have been shown to decrease copper levels by sorbing soluble copper in their exopolysaccharide (EPS) (2,28,47).…”

mentioning

confidence: 99%

Microbial Community Profile of a Lead Service Line Removed from a Drinking Water Distribution System

White

Tancos

Lytle

2011

Appl Environ Microbiol

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“…The hemispherical shape could be developed by the formed crevice between gelatinous metabolites and copper surface, which resulted well-defined pit. Rayes et al also reported the spherical pits in the presence of biofilms, while no pits were found without it [18]. The shape of pit was hemispherical because the bacteria live in dense as spherical [20,21].…”

Section: Anodic Polarization Experiments Of Copper In Groundwatermentioning

confidence: 99%

“…Even some researchers thought copper is toxic to common fouling mechanism [14]. However, MIC of copper alloys were reported in numerous cases in abroad [14][15][16][17][18]. The aim of this work was to analyze the early failure of copper pipes used in sprinkler.…”

Section: Introductionmentioning

confidence: 99%

Pitting failure of copper pipings for emergency fire sprinkler in ground water

Baek

Lee

Kim³

et al. 2015

Met. Mater. Int.

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The possibility of microbiologically influenced corrosion was investigated in the early pitted copper pipes. The pipes were installed for less than 6 months as an immergency fire sprinkler. The bacteria were cultured by sampling of corrosion by-product near pits on failed copper pipes for the aerobic as well as anaerobic bacteria. However, only aerobic bacteria was found, which were Micrococcus Luteus and Bacillus sp.. The corrosion rate of copper pipes were studied by weight loss in the groundwater and polarization method. In immersion test as well as the electrochemical polarization test in ground water, only Micrococcus Luteus could activate corrosion of copper by 20% and 15%, respectively. On the other hand, Bacillus sp. showed little effect on corrosion in the above two tests. The shape and characteristics of failed copper pipes as well as simulated copper were investigated using stereoscope, optical microscopy, scanning electron microscope and EDS. The cause of pits were discussed, related with the dissolved copper concentrations, pH, and optical density. It could be concluded that the early failure of copper pipings could be ascribed to the acceration of copper in the presence of bacteria, i.e., Micrococcus Luteus.

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Microbiologically induced corrosion of copper pipes in low-pH water

Cited by 59 publications

References 16 publications

A Model for Estimating the Impact of Orthophosphate on Copper in Water

A Model for Estimating the Impact of Orthophosphate on Copper in Water

Microbial Community Profile of a Lead Service Line Removed from a Drinking Water Distribution System

Pitting failure of copper pipings for emergency fire sprinkler in ground water

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