Characterization of suspended particles and deposits in drinking water reservoirs

2001 ◽  
Vol 1 (4) ◽  
pp. 89-94 ◽  
Author(s):  
V. Gauthier ◽  
J.M. Portal ◽  
J. Yvon ◽  
C. Rosin ◽  
J.C. Block ◽  
...  
Keyword(s):  
Drinking Water ◽  
Bacterial Colonization ◽  
Suspended Particles ◽  
Amorphous Iron ◽  
Reservoir Sediments ◽  
Biological Matter ◽  
Key Factor ◽  
Bacterial Accumulation ◽  
Factor Governing

Suspended particles transported by drinking water were examined to understand their role in deposit accumulation and colonization in pilot and full-scale reservoirs. No pesticides were detected in the deposits but several PAH were identified. Deposits accumulated at a rate of 8 μg/cm2/day (29 g/m2/year) over a five month period. Quartz, feldspar, and amorphous iron were characterized in reservoir sediments. Sedimentation of suspended particles, mainly those composed of organic (biological) matter, was incomplete, and was not a key factor governing bacterial accumulation in the deposits (104 to 105 CFU/ cm2). Thus, limiting bacterial nutrients - dissolved organic matter - in treated water should be the only way to control the extent of bacterial colonization of deposits.

Double-endpoint Genotoxicity Quantification and PAHs Characterization of Drinking Water Source alongside Polluted Yinghe River with High Tumor Mortality

2021 ◽  
Vol 41 (2) ◽  
pp. 189-198
Author(s):  
Wei Zhang ◽  
Chen Guo ◽  
Xiao-li Wang ◽  
Zhan-lu Lv ◽  
Lin Fan ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Source ◽  
Drinking Water Source

Characterization of chemical composition and bacterial community of corrosion scales in different drinking water distribution systems

2017 ◽  
Vol 3 (1) ◽  
pp. 147-155 ◽  
Author(s):  
Haibo Wang ◽  
Chun Hu ◽  
Lang Yin ◽  
Sujia Zhang ◽  
Lizhong Liu
Keyword(s):  
Drinking Water ◽  
Chemical Composition ◽  
Distribution Systems ◽  
Water Distribution ◽  
Iron Release ◽  
Drinking Water Distribution Systems ◽  
Biochemical Function ◽  
Drinking Water Distribution ◽  
Corrosion Scales

There is a relationship between biochemical function and chemical composition of corrosion scales, and Fe3O4formation reduced iron release.

Interaction between reverse micelles as a key factor governing back-extraction of proteins and its control systems

2005 ◽  
Vol 22 (4) ◽  
pp. 611-616 ◽  
Author(s):  
Sung-Sik Lee ◽  
Kyung-Su Hwang ◽  
Bong-Kuk Lee ◽  
Dong-Pyo Hong ◽  
Ryoich Kuboi
Keyword(s):  
Control Systems ◽  
Reverse Micelles ◽  
Back Extraction ◽  
Key Factor ◽  
Factor Governing

scholarly journals Culture-dependent and culture-independent characterization of microorganisms associated with Aedes aegypti (Diptera: Culicidae) (L.) and dynamics of bacterial colonization in the midgut

Acta Tropica ◽  
2010 ◽  
Vol 115 (3) ◽  
pp. 275-281 ◽  
Author(s):  
Desiely S. Gusmão ◽  
Adão V. Santos ◽  
Danyelle C. Marini ◽  
Mauricio Bacci ◽  
Marília A. Berbert-Molina ◽  
...  
Keyword(s):  
Aedes Aegypti ◽  
Bacterial Colonization ◽  
Culture Independent ◽  
Culture Dependent

Rising ecosystem water demand exacerbates the lengthening of tropical dry seasons

2021 ◽  
Author(s):  
Hao Xu ◽  
Xu Lian ◽  
Ingrid Slette ◽  
Hui Yang ◽  
Yuan Zhang ◽  
...  
Keyword(s):  
Water Demand ◽  
Potential Evapotranspiration ◽  
Central Africa ◽  
Dry Season ◽  
Land Area ◽  
Key Factor ◽  
Dry Seasons ◽  
The Tropics ◽  
Factor Governing

Abstract The timing and length of the dry season is a key factor governing ecosystem productivity and the carbon cycle of the tropics. Mounting evidence has suggested a lengthening of the dry season with ongoing climate change. However, this conclusion is largely based on changes in precipitation (P) compared to its long-term average (P ̅) and lacks consideration of the simultaneous changes in ecosystem water demand (measured by potential evapotranspiration, Ep, or actual evapotranspiration, E). Using several long-term (1979-2018) observational datasets, we compared changes in tropical dry season length (DSL) and timing (dry season arrival, DSA, and dry season end, DSE) among three common metrics used to define the dry season: P < P ̅, P < Ep, and P < E. We found that all three definitions show that dry seasons have lengthened in much of the tropics since 1979. Among the three definitions, P < E estimates the largest fraction (49.0%) of tropical land area likely experiencing longer dry seasons, followed by P < Ep (41.4%) and P < P ̅ (34.4%). The largest differences in multi-year mean DSL (> 120 days) among the three definitions occurred in the most arid and the most humid regions of the tropics. All definitions and datasets consistently showed longer dry seasons in southern Amazon (due to delayed DSE) and central Africa (due to both earlier DSA and delayed DSE). However, definitions that account for changing water demand estimated longer DSL extension over those two regions. These results indicate that warming-enhanced evapotranspiration exacerbates dry season lengthening and ecosystem water deficit. Thus, it is necessity to account for the evolving water demand of tropical ecosystems when characterizing changes in seasonal dry periods and ecosystem water deficits in an increasingly warmer and drier climate.

Suspended particles in the drinking water of two distribution systems

2001 ◽  
Vol 1 (4) ◽  
pp. 237-245 ◽  
Author(s):  
V. Gauthier ◽  
B. Barbeau ◽  
R. Millette ◽  
J.-C. Block ◽  
M. Prévost
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Organic Matter ◽  
Distribution System ◽  
Distribution Systems ◽  
Suspended Solids ◽  
Suspended Particles ◽  
Raw Water ◽  
Remote Locations ◽  
Dissolved Matter

The concentrations of suspended particles were measured in the drinking water of two distribution systems, and the nature of these particles documented. The concentrations of particulate matter were invariably found to be small (maximum 350 μg/L). They are globally in the very low range in comparison with dissolved matter concentrations, which are measured in several hundreds of mg/L. Except during special water quality events, such as turnover of the raw water resource, results show that organic matter represents the most important fraction of suspended solids (from 40 to 76%) in treated and distributed water. Examination of the nature of the particles made it possible to develop several hypotheses about the type of particles penetrating Montreal's distribution system during the turnover period (algae skeleton, clays). These particles were found to have been transported throughout the distribution systems quite easily, and this could result in the accumulation of deposits if their surface charge were ever even slightly destabilised, or if the particles were to penetrate the laminar flow areas that are fairly typical of remote locations in distribution systems.

scholarly journals Characterization of the aquifers of the Bangui urban area, Central African Republic, as an alternative drinking water supply resource

2013 ◽  
Vol 58 (8) ◽  
pp. 1760-1778 ◽  
Author(s):  
C.L. Djebebe-Ndjiguim ◽  
F. Huneau ◽  
A. Denis ◽  
E. Foto ◽  
G. Moloto-a-Kenguemba ◽  
...  
Keyword(s):  
Drinking Water ◽  
Water Supply ◽  
Urban Area ◽  
Central African Republic ◽  
Drinking Water Supply
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