Copper corrosion control in the Netherlands

2001 ◽  
Vol 1 (3) ◽  
pp. 75-82 ◽  
Author(s):  
P.G.G. Slaats ◽  
H. Brink ◽  
T.J.J. van der Hoven
Keyword(s):  
Drinking Water ◽  
The Netherlands ◽  
Treatment Techniques ◽  
Copper Pipe ◽  
Copper Release ◽  
Average Intake ◽  
Split Treatment ◽  
New Treatment ◽  
Monitoring Protocols ◽  
Copper Solubility

Copper is the most commonly used material for pipes in domestic installations in the Netherlands. Depending on the composition of the water the copper pipes can add a significant amount of copper to drinking water. In the new European Drinking Water Directive (98/83/EC) the parametric value for copper in drinking water is decreased from 3 to 2 mg/l. The new directive also stipulates that copper levels should be determined on the basis of a sample ‘taken at the consumers' tap’ representative of the weekly average intake by humans. Harmonisation of monitoring protocols for copper in the European member states is necessary. In the Netherlands about 45% of the drinking water is already softened or de-acidified in order to decrease copper concentrations in drinking water. In the Netherlands two new treatment techniques have been studied for their impact on copper release; these are Reverse Osmosis (RO) and the addition of inhibitors. Copper pipe rig tests have shown that RO treatment decreases copper release. Split treatment of water with RO reduces copper solubility of drinking water through a decrease in both total inorganic carbon (TIC) and sulphate level. Remarkable was the relatively small decrease in copper release after split treatment with RO, compared to previous experiences in the Netherlands, suggesting an effect of natural organic matter. A new promising technique in the Netherlands is the addition of the inhibitor carbonate-activated silicate. At the test sites, the reduction in copper solubility due to the use of carbonate-activated silicate was 15 to 35%.

Storage reservoirs – a first barrier for pathogenic micro-organisms in the Netherlands

1998 ◽  
Vol 37 (2) ◽  
pp. 253-260 ◽  
Author(s):  
Lambert W. C. A. van Breemen ◽  
Henk A. M. Ketelaars ◽  
Wim Hoogenboezem ◽  
Gertjan Medema
Keyword(s):  
Drinking Water ◽  
The Netherlands ◽  
Agricultural Waste ◽  
Quality Criteria ◽  
River Rhine ◽  
Total Production ◽  
River Meuse ◽  
Storage Reservoirs ◽  
Microbiological Water Quality ◽  
Micro Organisms

Production of drinking water from river water, abstracted either directly from river or from storage reservoirs, requires the application of barriers for pathogenic micro-organisms. About one third of the total production of drinking water in the Netherlands is derived from surface water, mainly the River Meuse and branches of the River Rhine. The results of extensive monitoring programmes show that the microbiological water quality of the River Rhine and River Meuse is strongly influenced by domestic and agricultural waste water discharges, with respect to the River Meuse mainly in the Liège-region in Belgium. Densities of Cryptosporidium and Giardia in both rivers are comparable; the highest density was found in the Belgian Meuse basin. Elimination rates of 1.7- to 3.1 10log-units for pathogenic micro-organisms were found in Dutch storage reservoirs, which can thus be considered as an important first barrier for pathogenic microorganisms. The elimination capacity of reservoirs is influenced by retention time and contamination by waterfowl. To meet the proposed quality criteria for pathogens in drinking water, however, additional barriers are required.

Evaluation of the introduction of a new treatment for the termination of pregnancy in The Netherlands

2010 ◽  
Vol 89 (9) ◽  
pp. 1210-1213 ◽  
Author(s):  
Joseph F.G.M. Brouns ◽  
Matthe P.M. Burger ◽  
Wim J. van Wijngaarden
Keyword(s):  
The Netherlands ◽  
Termination Of Pregnancy ◽  
New Treatment

De watervoorziening op de zandgronden

2019 ◽  
Vol 4 (2) ◽  
pp. 74-88
Author(s):  
BERT GROENEWOUDT
Keyword(s):  
Drinking Water ◽  
The Netherlands ◽  
Water Supply ◽  
Rural Areas ◽  
Functional Differentiation ◽  
16Th Century ◽  
14Th Century ◽  
Local Topography ◽  
Spatio Temporal ◽  
Settlement Landscape

Water supply in the sandy dry lands (the Netherlands). Spatio-temporal developments Wells as water facilities were standard elements of the Dutch settlement landscape only since the Roman period. At the same time (drinking) water facilities became largely detached from the local topography. The position of a well within a settlement became determined by that of its associated house, and its position relative to the house became more or less fixed. This reflects the functional and social subdivision of the farmhouse into two distinct sections: ‘front’ and ‘back’. Communal water facilities (socially important as well) seem to have been associated with nucleated settlement, and they always existed alongside private facilities. Communal (public) wells first appeared in towns around the 13th or 14th century, but in rural areas probably not until the 16th century. In different periods there is evidence for the expression of social and functional differentiation.

Salvage local treatment for localized radio-recurrent prostate cancer: a narrative review and future perspectives

2021 ◽  
Author(s):  
David Büchser ◽  
Rafael Medina ◽  
Esther Mayrata ◽  
Alba González ◽  
Marina Marban ◽  
...  
Keyword(s):  
Prostate Cancer ◽  
Local Treatment ◽  
Focus Ultrasound ◽  
Disease Recurrence ◽  
High Dose Rate ◽  
Narrative Review ◽  
High Dose ◽  
Treatment Techniques ◽  
Frequent Site ◽  
New Treatment

Although dose escalation protocols have improved biochemical control in prostate cancer radiotherapy, 10–45% of patients will experience disease recurrence. The prostate and seminal vesicles are the most frequent site of the first relapse. Traditionally, these patients have been managed with hormonal therapy, which is not curative. Recent improvements in diagnostic tests (e.g., multiparametric magnetic resonance and molecular imaging, including PET/CT scan with choline or Ga-PSMA) and new treatment techniques (e.g., stereotactic body radiation therapy or other minimally invasive alternatives like high-intensity focus ultrasound, cryoablation or high-dose-rate brachytherapy) offer new therapeutic strategies with the potential to cure some patients with limited adverse effects. In this narrative review, the authors present the most recent evidence to help identify the most suitable candidates for salvage treatment.

Sensory aspects of drinking water in contact with epoxy lined copper pipe

2007 ◽  
Vol 55 (5) ◽  
pp. 161-168 ◽  
Author(s):  
T.H. Heim ◽  
A.M. Dietrich
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Organic Compounds ◽  
Sensory Analysis ◽  
Water Samples ◽  
Distribution System ◽  
Distribution Systems ◽  
Free Chlorine ◽  
Copper Pipe

Pipe relining via in situ epoxy lining is used to remediate corroded plumbing or distribution systems. This investigation examined the effects on odour, TOC, THM formation and disinfectant demand in water exposed to epoxy-lined copper pipes used for home plumbing. The study was conducted in accordance with the Utility Quick Test, a migration/leaching method for utilities to conduct sensory analysis of materials in contact with drinking water. The test was performed using water with no disinfectant and levels of chlorine and monochloramines representative of those found in the distribution system. Panelists repeatedly and consistently described a “plastic/adhesive/putty” odour in the water from the pipes. The odour intensity remained relatively constant for each of two subsequent flushes. Water samples stored in the epoxy-lined pipes showed a significant increase in the leaching of organic compounds (as TOC), and this TOC was demonstrated to react with free chlorine to form trichloromethane. Water stored in the pipes also showed a marked increase in disinfectant demand relative to the water stored in glass control flasks. A study conducted at a full scale installation at an apartment demonstrated that after installation and regular use, the epoxy lining did not yield detectable differences in water quality.

scholarly journals Exploring the regulatory challenges of a possible rollout of smart water meters in the Netherlands

2018 ◽  
Vol 19 (3-4) ◽  
pp. 159-179
Author(s):  
Brenda Espinosa Apráez ◽  
Saskia Lavrijssen
Keyword(s):  
Drinking Water ◽  
Big Data ◽  
The Netherlands ◽  
Goods And Services ◽  
Smart Water ◽  
Water Meters ◽  
Regulatory Challenges

Big data have become a driver of innovation in multiple sectors, including the management of infrastructures employed for the provision of essential goods and services, such as drinking water. As technology enables new possibilities of action for infrastructure managers, it could be questioned whether the regulations in place still deal adequately with such possibilities or if certain adjustments are necessary, especially considering that infrastructure managers usually operate in highly regulated environments. This study explores the regulatory challenges of introducing smart water meters (SWM) in the Netherlands. In particular, it discusses whether the introduction of SWM will require adjusting the regulations of the sector, to deal with the new possibilities of action enabled by this technology.

scholarly journals How current risk assessment and risk management methods for drinking water in The Netherlands cover the WHO water safety plan approach

2019 ◽  
Vol 222 (7) ◽  
pp. 1030-1037 ◽  
Author(s):  
H.H.J.L. van den Berg ◽  
L. Friederichs ◽  
J.F.M. Versteegh ◽  
P.W.M.H. Smeets ◽  
A.M. de Roda Husman
Keyword(s):  
Risk Assessment ◽  
Risk Management ◽  
Drinking Water ◽  
The Netherlands ◽  
Water Safety ◽  
Safety Plan ◽  
Water Safety Plan ◽  
Current Risk

scholarly journals Effects of weather conditions on drinking water distribution pipe failures in the Netherlands

2018 ◽  
Vol 19 (2) ◽  
pp. 404-416 ◽  
Author(s):  
B. A. Wols ◽  
A. Vogelaar ◽  
A. Moerman ◽  
B. Raterman
Keyword(s):  
Drinking Water ◽  
The Netherlands ◽  
Water Distribution ◽  
Weather Conditions ◽  
Weather Data ◽  
Pipe Failure ◽  
Failure Data ◽  
Drinking Water Distribution ◽  
Soil Settlement ◽  
Remote Sensing Techniques

Abstract The influence of the weather parameters of temperature, wind and drought on pipe failure of drinking water distribution pipes was studied for the Netherlands. Several data sources were used relating weather effects to pipe failure: pipe failure data, regional weather data from different weather stations in the Netherlands, soil settlement data obtained from satellites and (modelled) pressure data. For asbestos-cement (AC) and cast iron (CI) pipes, temperature was an important factor. CI pipes showed increased pipe failures at low temperatures, which confirms results from previous studies, whereas AC pipes showed increased pipe failures at high temperatures. Pipe failure rates were higher for pipes that on average received higher internal pressures. This study also showed that wind resulted in additional pipe failures caused by uprooting of trees during a severe storm. With respect to drought, in some regions in the Netherlands, increased pipe failures during periods of drought were found. A small influence of soil settlement on pipe failure was found using remote-sensing techniques for a small area (5 × 10 km) in the Netherlands.

scholarly journals Effect of Chloride Ions on the Point-of-Use Drinking Water Disinfection Performance of Porous Ceramic Media Embedded with Metallic Silver and Copper

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1625
Author(s):  
Rekha Singh ◽  
Woohang Kim ◽  
James A. Smith
Keyword(s):  
Drinking Water ◽  
Porous Ceramic ◽  
Chloride Ion ◽  
Silver Ions ◽  
Chloride Ions ◽  
Ion Concentration ◽  
Metallic Silver ◽  
E Coli ◽  
Ion Concentrations ◽  
Copper Release

This study quantifies the effects of chloride ions on silver and copper release from porous ceramic cubes embedded with silver and copper and its effect on E. coli disinfection in drinking water. Log-reduction of E. coli by silver ions decreased after 4 h of contact time as the chloride ion concentration increased from 0 to 250 mg/L but, it was not changed by copper ions under the same conditions. For silver addition by silver-ceramic cubes, log reductions of E. coli decreased sharply from 7.2 to 1.6 after 12 h as the chloride concentration increased from 0 to 250 mg/L. For the silver-ceramic cube experiments, chloride ion also reduced the total silver concentration in solution. After 24 h, total silver concentrations in solution decreased from 61 µg/L to 20 µg/L for corresponding chloride ion concentrations. According to the MINTEQ equilibrium model analysis, the decrease in disinfection ability with silver embedded ceramic cubes could be the result of precipitation of silver ions as silver chloride. This suggests that AgCl was precipitating within the pore space of the ceramic. These results indicate that, although ionic silver is a highly effective disinfectant for E. coli, the presence of chloride ions can significantly reduce disinfection efficacy. For copper-ceramic cubes, log reductions of E. coli by copper embedded cubes increased from 1.2 to 1.5 when chloride ion concentration increased from 0 to 250 mg/L. Total copper concentrations in solution increased from 4 µg/L to 14 µg/L for corresponding chloride ion concentrations. These results point towards the synergistic effect of chloride ions on copper oxidation as an increased concentration of chloride enhances copper release.

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