Please use this identifier to cite or link to this item: https://doi.org/10.1021/es1039826
Title: Determination of PbO2 formation kinetics from the chlorination of Pb(II) carbonate solids via direct PbO2 measurement
Authors: Zhang, Y.
Lin, Y.-P. 
Issue Date: 15-Mar-2011
Source: Zhang, Y., Lin, Y.-P. (2011-03-15). Determination of PbO2 formation kinetics from the chlorination of Pb(II) carbonate solids via direct PbO2 measurement. Environmental Science and Technology 45 (6) : 2338-2344. ScholarBank@NUS Repository. https://doi.org/10.1021/es1039826
Abstract: Lead dioxide (PbO2), a new form of lead corrosion product discovered in the distribution system, is formed via the chlorination of Pb(II) solids and plays an important role in regulating lead concentration in drinking water. The kinetics of its formation, however, has not been quantitatively determined primarily because of the difficulties in accurately measuring PbO2 concentration. In this study, we apply an iodometric method for direct PbO2 measurement to determine its formation kinetics from the chlorination of cerussite (PbCO3) and hydrocerussite (Pb 3(CO3)2(OH)2). The obtained rate equations suggest that for both Pb(II) carbonate solids, the formation of PbO2 is firstorder with respect to the available Pb(II) solid surface area, free chlorine concentration, and OH- concentration. Dissolved inorganic carbon concentration (DIC) was found to inhibit PbO2 formation because of the formation of carbonate-lead surface complexes that protect the surface Pb(II) sites from oxidation. The rate of PbO2 formation from the chlorination of hydrocerussite was faster than that of cerussite under the same Pb(II) solid loading. However, after normalization of the surface area, the rate constants obtained for both Pb(II) solids are similar. The kinetics of PbO2 formation is elucidated for the first time in this study. © 2011 American Chemical Society.
Source Title: Environmental Science and Technology
URI: http://scholarbank.nus.edu.sg/handle/10635/90941
ISSN: 0013936X
DOI: 10.1021/es1039826
Appears in Collections:Staff Publications

Show full item record
Files in This Item:
There are no files associated with this item.

SCOPUSTM   
Citations

13
checked on Feb 15, 2018

WEB OF SCIENCETM
Citations

12
checked on Feb 6, 2018

Page view(s)

24
checked on Feb 13, 2018

Google ScholarTM

Check

Altmetric


Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.