Preventing the colloidal dispersion of Pb(iv) corrosion scales and lead release in drinking water distribution systems

2019 ◽  
Vol 5 (7) ◽  
pp. 1262-1269 ◽  
Author(s):  
Gregory Korshin ◽  
Haizhou Liu
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Solid Phase ◽  
Water Distribution Systems ◽  
Colloidal Dispersion ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution ◽  
Lead Release ◽  
Corrosion Scales

Lead(iv) oxide PbO2 is one dominant solid phase in lead corrosion scales of drinking water distribution systems.

Bromide-assisted catalytic oxidation of lead(ii) solids by chlorine in drinking water distribution systems

2017 ◽  
Vol 53 (62) ◽  
pp. 8695-8698 ◽  
Author(s):  
John Orta ◽  
Samuel Patton ◽  
Haizhou Liu
Keyword(s):  
Drinking Water ◽  
Catalytic Oxidation ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Redox Process ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution ◽  
Lead Release

This study investigated the effect of bromide on the oxidation of three lead(ii) solids by chlorine – a redox process critical to the control of lead release in drinking water distribution systems.

scholarly journals Cr(VI) and Cr(III) Release From Different Layers of Cast Iron Corrosion Scales in Drinking Water Distribution Systems: The Impact of pH, Temperature, Sulfate, and Chloride

2021 ◽  
Author(s):  
Yimei Tian ◽  
Tiantian Yu ◽  
Jingyi Shen ◽  
Guolei Zheng ◽  
Han Li ◽  
...  
Keyword(s):  
Drinking Water ◽  
Distribution Systems ◽  
Water Distribution ◽  
Water Distribution Systems ◽  
Extraction Procedure ◽  
Surrounding Water ◽  
Drinking Water Distribution Systems ◽  
Drinking Water Distribution ◽  
Corrosion Scales ◽  
The Impact

Abstract Chromium accumulated from source water and pipeline lining materials in corrosion scales could potentially be released into bulk water in drinking water distribution systems (DWDS). Chromium behaviors between corrosion scale phase and the surrounding water phase vary spatially in different layers and temporally in different DWDS running periods. In this study, corrosion scales sampled from actual DWDS were first characterized by SEM, XRD, XRF, and the modified BCR three-step sequential extraction procedure. Then scales were divided into the outer and inner layers for subsequent analysis. Static accumulation and release experiments were performed with Cr(VI) and Cr(III) on two distinct scale layers to systematically assess the influence of pH, temperature, sulfate, and chloride. The release behaviors of Cr(VI) under the co-effect of multiple factors were investigated in orthogonal experiments. Results showed that in the outer and inner layers of corrosion scales, chromium exhibited differences in accumulation and release behaviors, with the outer layer accumulating less and releasing more. The mechanisms of chromium retention based on different iron (oxyhydr)oxides were discussed.

Sign in / Sign up

Export Citation Format

Share Document