Analysis of heavy metals leaching from internal pipe cement coating into potable water
Authors:
- Andrzej Bielski,
- Michał Zielina,
- Anna Młyńska
Abstract
This paper presents a mathematical model of chromium and lead leaching from internal pipe cement coatings to drinking water soon after renovation. Among other things, the model takes into account the adsorption of heavy metals inside porous cement coatings and diffusive transport, not only in coating capillaries but also in a water phase inside the pipe. Such phenomena have been ignored in other mathematical models simulating the leaching of heavy metals from pipe cement coatings. The proposed mathematical model was experimentally verified and high correlation between the results was observed. It has been proven that sorption inside the cement coating was responsible for the visible decrease of leaching in time, and that diffusive transport in the liquid phase inside the pipe influenced leaching speed. The experimental and numerical tests showed an initial sudden and significant increase to more than 10 μg/dm3, followed by a gradual decrease of chromium and lead leaching, reaching equilibrium concentrations close to 2.0 μg/dm3 after about 20 days. Enlargement of hydraulic pressure inside the pipe did not affect the initial increase of heavy metal concentrations in the water phase, but accelerated their decrease. The use of a twice larger pipe diameter led to an almost twofold reduction of initial peak chromium concentration inside the pipe.
- Record ID
- CUT26192c0b68204a29a1af445f82322a3a
- Publication categories
- ;
- Author
- Journal series
- Journal of Cleaner Production, ISSN 0959-6526, e-ISSN 1879-1786
- Issue year
- 2020
- Vol
- 265
- Pages
- [1-12]
- Article number
- 121425
- Other elements of collation
- rys.; tab.; wykr.; Bibliografia (na s.) - 11-12; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 265
- Keywords in English
- water quality, drinking water, water pipe, renovation, pollutants, leaching
- DOI
- DOI:10.1016/j.jclepro.2020.121425 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S0959652620314724 Opening in a new tab
- Language
- eng (en) English
- Score (nominal)
- 140
- Additional fields
- Indeksowana w: Web of Science, Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT26192c0b68204a29a1af445f82322a3a/
- URN
urn:pkr-prod:CUT26192c0b68204a29a1af445f82322a3a
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.