Effect of Leaching on pH of Surrounding Water

Law, David W.; Evans, Jane

doi:10.14359/51685662

Cited by 4 publications

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“…[ 24 ] The total number of hydroxyl ions leached is typically dependent on the chemical composition of the cements. [ 24 ]…”

Section: Resultsmentioning

confidence: 99%

“…Otherwise, pozzolanic reaction that occurs in mortars, consumes calcium hydroxide to form secondary calcium silicate hydrates. [ 24 ] Additionally, the silica fume mortar was made with an SRPC cement, which has a lower calcium content than the PCC cement.…”

Section: Resultsmentioning

confidence: 99%

“…The overall increase in the pH values is attributed to the leaching of calcium ions from the mortar matrix into the water samples. [ 24 ] The total number of hydroxyl ions leached is typically dependent on the chemical composition of the cements. [ 24 ]…”

Section: Resultsmentioning

confidence: 99%

“…[24][25][26] Previous studies by Sagues et al [27] on small amounts (0.4 mL) of water also showed that as calcium ions begin to leach out of the concrete, the pH of the water rose until a terminal pH was reached. [24] For the washed samples as shown in Figure 2b…”

Section: Ph Of the Water Samplesmentioning

confidence: 99%

“…These findings are consistent with previous reports in the literature that pH of water will increase to a peak value as the leachate diffuses into the water and then decreases again as the released hydroxide ions react with chemicals in the water. [24][25][26] Previous studies by Sagues et al [27] on small amounts (0.4 mL) of water also showed that as calcium ions begin to leach out of the concrete, the pH of the water rose until a terminal pH was reached. [24] For the washed samples as shown in Figure 2b…”

Section: Ph Of the Water Samplesmentioning

confidence: 99%

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Investigating the possibility of PCCP mortar coating leaching and the impact on drinking water quality

Hassi

Menu²,

Javanmardi

et al. 2023

CLEAN Soil Air Water

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The objective of this article was to investigate the potential for the dissolution and leaching of certain chemical elements from the protective mortar coatings of prestressed concrete cylinder pipe (PCCP) into drinking water in the event of leakage and how this might affect the overall quality of the water delivered to consumers. The mortars as linings are also typically used for renovation of old pipes. Samples from three frequently used mortar coating mixtures underwent immersion in water after 28 days of curing and were monitored for 430 days. The water was tested for pH levels and the presence of aluminum, chromium, lead, and iron, in accordance with the standards set for human consumption in Moroccan and other countries such as Australia, Canada, and the United States, as well as organizations such as the European Union and World Health Organization. The results indicate that the highest levels of aluminum, iron, chromium, and lead leaching occurred after the initial contact with water, gradually declining over time. Furthermore, the inclusion of silica fume and fly ash in the coating increases the potential for chemical element leaching. Additionally, preinstallation pipeline washing demonstrates its effectiveness in reducing the leaching of chemical elements into drinking water in the event of leakages. The overall results suggest that the likelihood of contamination of drinking water by leaching of chemical elements from the mortar coating in case of a leakage appears to be negligible under the studied conditions.

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“…[ 24 ] The total number of hydroxyl ions leached is typically dependent on the chemical composition of the cements. [ 24 ]…”

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

Section: Ph Of the Water Samplesmentioning

confidence: 99%

Section: Ph Of the Water Samplesmentioning

confidence: 99%

See 3 more Smart Citations

Investigating the possibility of PCCP mortar coating leaching and the impact on drinking water quality

Hassi

Menu²,

Javanmardi

et al. 2023

CLEAN Soil Air Water

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Coral Propagation in Substrates Obtained Through Additive Manufacturing: Influence of Mortar Formulations on Seawater Parameters

Valenzuela Matus,

Góis,

Vaz-Pires

et al. 2024

ACS Sustainable Chem. Eng.

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Effects of poly(3-hydroxybutyrate) [P(3HB)] coating on the bacterial communities of artificial structures

Chai,

Syauqi,

Sudesh

et al. 2024

PLoS ONE

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The expanding urbanization of coastal areas has led to increased ocean sprawl, which has had both physical and chemical adverse effects on marine and coastal ecosystems. To maintain the health and functionality of these ecosystems, it is imperative to develop effective solutions. One such solution involves the use of biodegradable polymers as bioactive coatings to enhance the bioreceptivity of marine and coastal infrastructures. Our study aimed to explore two main objectives: (1) investigate PHA-degrading bacteria on polymer-coated surfaces and in surrounding seawater, and (2) comparing biofilm colonization between surfaces with and without the polymer coating. We applied poly(3-hydroxybutyrate) [P(3HB)) coatings on concrete surfaces at concentrations of 1% and 6% w/v, with varying numbers of coating cycles (1, 3, and 6). Our findings revealed that the addition of P(3HB) indeed promoted accelerated biofilm growth on the coated surfaces, resulting in an occupied area approximately 50% to 100% larger than that observed in the negative control. This indicates a remarkable enhancement, with the biofilm expanding at a rate roughly 1.5 to 2 times faster than the untreated surfaces. We observed noteworthy distinctions in biofilm growth patterns based on varying concentration and number of coating cycles. Interestingly, treatments with low concentration and high coating cycles exhibited comparable biofilm enhancements to those with high concentrations and low coating cycles. Further investigation into the bacterial communities responsible for the degradation of P(3HB) coatings identified mostly common and widespread strains but found no relation between the concentration and coating cycles. Nevertheless, this microbial degradation process was found to be highly efficient, manifesting noticeable effects within a single month. While these initial findings are promising, it’s essential to conduct tests under natural conditions to validate the applicability of this approach. Nonetheless, our study represents a novel and bio-based ecological engineering strategy for enhancing the bioreceptivity of marine and coastal structures.

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Effect of Leaching on pH of Surrounding Water

Cited by 4 publications

References 0 publications

Investigating the possibility of PCCP mortar coating leaching and the impact on drinking water quality

Investigating the possibility of PCCP mortar coating leaching and the impact on drinking water quality

Coral Propagation in Substrates Obtained Through Additive Manufacturing: Influence of Mortar Formulations on Seawater Parameters

Effects of poly(3-hydroxybutyrate) [P(3HB)] coating on the bacterial communities of artificial structures

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