Degradation of trichloronitromethane by iron water main corrosion products

Lee, Jeong Yub; Pearson, Carrie R.; Hozalski, Raymond M.; Arnold, William A.

doi:10.1016/j.watres.2007.12.012

Cited by 24 publications

(14 citation statements)

References 29 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This study also revealed that HAAs formation reduced gradually from 41.5 to 71.02% with an increase of total Fe(II) ions concentration from 0.35 to 3 mg/L for the reaction period of 3.5 h. This finding is in agreement with the previous observations which have reported that iron oxides surface (i.e. magnetite, goethite) accelerated the reduction rates of various organic com- Lee et al (2008) reported that the degradation rate for TCNM (trichloronitromethane), a non-regulated DBP (disinfection by-product), depends on water-soluble iron in water systems. Fe(II) is a strong reductant (Amold et al 2010) and when the concentration of Fe(II) ions increase, it increases the reactive surface area, via oxidation of Fe(II) to Fe(III) by residual disinfectants along with other oxidants, and consequent precipitation.…”

Section: Resultssupporting

confidence: 92%

Bench scale evaluation of Fe(II) ions on haloacetic acids (HAAs) formation in synthetic water

Rahman

Gagnon

2013

Journal of Water Supply: Research and Technology-Aqua

View full text Add to dashboard Cite

Cast iron pipes were installed broadiy in North American water utilities, particuiariy in dider cities such as Halifax, NS, and other cities in the northeastern portions of Canada and the USA. Many of these cast iron pipes are corroded and are continuous sources of Fe(ll) ions in drinking water distribution systems. In this paper, the results of an experimental investigation into the factors influencing haloacetic acids (HAAs) formation in the presence of Fe(ll) ions are presented. The experiments were conducted using NaHC03 buffered synthetic water sampies with different characteristics (i.e. pH, phosphate, stagnation time) simuiating with water distribution systems. The results showed that Fe(ll) ions significantly reduced HAAs formation in different reaction systems at a 95% confidence level. In control water systems, pH had no significant impact, however, in the presence of Fe(ll) ions in water, pH had an obvious impact to increase HAAs formation (a = 0.05). In contrast, phosphate-based corrosion inhibitor significantly (a = 0.05) reduced HAAs formation in the presence of different dosages of Fe(ll) ions in water samples for the reaction period of 24,48, 84 and 130 h, respectively. Significant factors and their rank Influencing HAAs formation and distribution were identified using a 2" full factorial design approach.

show abstract

Section: Resultssupporting

confidence: 92%

Bench scale evaluation of Fe(II) ions on haloacetic acids (HAAs) formation in synthetic water

Rahman

Gagnon

2013

Journal of Water Supply: Research and Technology-Aqua

View full text Add to dashboard Cite

show abstract

“…Chlorinated and brominated DBP were shown susceptible to reduction by zero-valent Fe (Fe0) and a combination of iron oxide systems such as Fe(II)/goethite, Fe(II)/magnetite, and so on (Zhang et al 2004;Chun et al 2005Chun et al , 2007Lee et al 2007). Trichloronitromethane (non-regulated DBP) was shown to degrade by iron corrosion solids (Lee et al 2008). Reaction of pipe solids with DBP was primarily influenced by the water-extractable iron levels and as well surface area of corrosion solids (Lee et al 2008).…”

Section: Discussionmentioning

confidence: 99%

“…Trichloronitromethane (non-regulated DBP) was shown to degrade by iron corrosion solids (Lee et al 2008). Reaction of pipe solids with DBP was primarily influenced by the water-extractable iron levels and as well surface area of corrosion solids (Lee et al 2008). Effect of DBP on Fe chemistry may as well determine the fate of associated contaminants with the Fe rich pipe scales.…”

Section: Discussionmentioning

confidence: 99%

Co-occurrence profiles of trace elements in potable water systems: a case study

Andra

Makris

Charisiadis

et al. 2014

Environ Monit Assess

View full text Add to dashboard Cite

Potable water samples (N = 74) from 19 zip code locations in a region of Greece were profiled for 13 trace elements composition using inductively coupled plasma mass spectrometry. The primary objective was to monitor the drinking water quality, while the primary focus was to find novel associations in trace elements occurrence that may further shed light on common links in their occurrence and fate in the pipe scales and corrosion products observed in urban drinking water distribution systems. Except for arsenic at two locations and in six samples, rest of the analyzed elements was below maximum contaminant levels, for which regulatory values are available. Further, we attempted to hierarchically cluster trace elements based on their covariances resulting in two groups; one with arsenic, antimony, zinc, cadmium, and copper and the second with the rest of the elements. The grouping trends were partially explained by elements' similar chemical activities in water, underscoring their potential for co-accumulation and co-mobilization phenomena from pipe scales into finished water. Profiling patterns of trace elements in finished water could be indicative of their load on pipe scales and corrosion products, with a corresponding risk of episodic contaminant release. Speculation was made on the role of disinfectants and disinfection byproducts in mobilizing chemically similar trace elements of human health interest from pipe scales to tap water. It is warranted that further studies may eventually prove useful to water regulators from incorporating the acquired knowledge in the drinking water safety plans.

show abstract

“…Many water quality changes, however, result from reactions that occur exclusively or primarily on pipe or tank surfaces, reactions such as metal corrosion and release of lead or copper (Hozalski et al, 2005) and growth of bacteria (LeChevallier et al, 1993). In recent years, the authors have been investigating the iron surface–mediated abiotic reductive dehalogenation of DBPs, relying primarily on glass bottle batch experiments with iron metal (Lee et al, 2007; Pearson et al, 2005), synthetic iron corrosion products (Chun et al, 2007; 2005), and corrosion products scraped from the walls of formerly in‐service iron water mains (Lee et al, 2008). Certainly, batch reactor experiments are relatively easy to set up and monitor, and they permit replicates to be run to assess experimental reproducibility.…”

mentioning

confidence: 99%

“…Such experiments, however, have limitations. For example, in experiments involving corrosion products scraped from water mains (Lee et al, 2008), removal of solids from the surface could expose more reduced ferrous iron [Fe(II)]–containing minerals (e.g., magnetite) that were previously buried underneath a tubercle shell composed primarily of ferric iron [Fe(III)] minerals. This could potentially result in elevated rates of abiotic reductive dehalogenation of DBPs.…”

mentioning

confidence: 99%

TBAA reduction in reactors simulating distribution system pipes

Arnold¹,

Hozalski²,

Pearson³

et al. 2010

Journal AWWA

Self Cite

View full text Add to dashboard Cite

To investigate the potential role of abiotic reduction in the loss of disinfection by‐products in distribution systems, the degradation of tribromoacetic acid (TBAA) in pipe reactors made of new and previously in‐service iron pipe was studied. TBAA was degraded in all of the reactors, with dibromoacetic acid, bromoacetic acid, and bromide as the observed products. The observation of these dehalogenation products under oxic conditions—in which oxygen would be preferred over TBAA as a terminal electron acceptor for biological processes—indicates that abiotic reduction by iron minerals at the pipe wall is responsible for the observed debromination reactions. The iron oxides formed in the pipes comprised goethite, lepidocrocite, and magnetite. Results suggest that abiotic reduction of highly reactive disinfection by‐products at the pipe wall is potentially an important loss process in distribution systems.

show abstract

Degradation of trichloronitromethane by iron water main corrosion products

Cited by 24 publications

References 29 publications

Bench scale evaluation of Fe(II) ions on haloacetic acids (HAAs) formation in synthetic water

Bench scale evaluation of Fe(II) ions on haloacetic acids (HAAs) formation in synthetic water

Co-occurrence profiles of trace elements in potable water systems: a case study

TBAA reduction in reactors simulating distribution system pipes

Contact Info

Product

Resources

About