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Quality of Water

Quality of Water

In concrete preparation, the quality of water is paramount as it affects the strength and durability of the concrete. Potable water is usually preferred; however, it must not have excessive sodium or potassium to prevent compromising the concrete's integrity. Water quality is typically evaluated based on impurities such as dissolved solids, chlorides, and sulfates, and its pH value is ideally between 6 and 8. Even slightly acidic natural water may be acceptable unless it contains harmful...

Testing Water Quality

Testing Water Quality

When the quality of water for concrete preparation is uncertain, its impact on the setting time of cement and compressive strength of mortar is assessed by comparison with de-ionized or distilled water benchmarks. American Society for Testing and Materials (ASTM) C1602 requires the setting times to be within 90 minutes of the control, British Standard (BS) 3146:1980 allows a 30-minute variance in the initial setting, while British Standards European Norm (BS EN) 1008 specifies initial setting...

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Related Experiment Video

Updated: Jul 18, 2025

VirWaTest, A Point-of-Use Method for the Detection of Viruses in Water Samples

VirWaTest, A Point-of-Use Method for the Detection of Viruses in Water Samples

Published on: May 11, 2019

Integrating Virus Monitoring Strategies for Safe Non-potable Water Reuse.

Sunny C Jiang^1,2, Heather N Bischel³, Ramesh Goel⁴

¹Department of Civil and Environmental Engineering, University of California, Irvine, CA 92697, USA.

|August 25, 2023

Summary

This summary is machine-generated.

Wastewater reuse can boost water supplies, but viral safety concerns hinder adoption. New monitoring and modeling methods, including artificial neural networks (ANNs), offer cost-effective ways to assess viral risks in recycled water.

Keywords:

Modeling Reuse Surrogates Viruses Wastewater

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EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. II. Total Culturable Virus Assay

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. II. Total Culturable Virus Assay

Published on: September 11, 2016

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. I. Collection of Virus Samples

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. I. Collection of Virus Samples

Published on: March 28, 2015

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Last Updated: Jul 18, 2025

VirWaTest, A Point-of-Use Method for the Detection of Viruses in Water Samples

VirWaTest, A Point-of-Use Method for the Detection of Viruses in Water Samples

Published on: May 11, 2019

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. II. Total Culturable Virus Assay

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. II. Total Culturable Virus Assay

Published on: September 11, 2016

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. I. Collection of Virus Samples

EPA Method 1615. Measurement of Enterovirus and Norovirus Occurrence in Water by Culture and RT-qPCR. I. Collection of Virus Samples

Published on: March 28, 2015

Area of Science:

Environmental Science
Microbiology
Public Health

Background:

Wastewater reclamation and reuse are crucial for water supply resilience and meeting growing demands.
Non-potable water reuse is a large market, but economic and microbial safety concerns, particularly viral pathogens, limit its implementation.
Cost-effective, real-time viral quality monitoring is needed to increase confidence in water reuse.

Purpose of the Study:

To review advancements in monitoring and modeling of viral health risks in wastewater reuse.
To discuss current wastewater treatment technologies for virus removal.
To explore new and traditional methods for viral measurement and risk assessment.

Main Methods:

Review of wastewater reclamation processes and virus removal technologies.
Evaluation of culture- and molecular-based viral detection methods.
Introduction of viral surrogates and pathogenic viruses as risk indicators.
Discussion of quantitative microbial risk assessments (QMRAs) and artificial neural networks (ANNs) for risk modeling.

Main Results:

Current wastewater treatment technologies focus on virus removal.
Various methods exist for virus measurement, each with pros and cons.
Metagenomic analyses and flow cytometry are emerging techniques for viral screening and quantification.
ANNs can integrate diverse data for cost-effective viral risk assessment in recycled water.

Conclusions:

Technologies for identifying and implementing viral surrogates for health risk reduction are advancing.
Combining modeling with monitoring data provides a more robust assessment of water reuse risks.
Cost-effective strategies using ANNs and complementary viral quality measures can enhance the safety of recycled water.