Validation of a novel direct-injection chemiluminescence-based method for N-nitrosamine analysis in advanced-treated recycled water, drinking water, and wastewater

2020 ◽  
Vol 6 (4) ◽  
pp. 1106-1115 ◽  
Author(s):  
Shannon L. Roback ◽  
Hitoshi Kodamatani ◽  
Takahiro Fujioka ◽  
Megan H. Plumlee
Keyword(s):  
Drinking Water ◽  
Direct Injection ◽  
Recycled Water ◽  
Standard Methods ◽  
Water Drinking ◽  
Novel Method ◽  
Water And Wastewater

A novel method for N-nitrosamines analysis requiring significantly less time, labor and cost than standard methods is shown to have acceptable performance in multiple water matrices and yield similar results.

Tastes associated with products in contact with drinking water

2004 ◽  
Vol 49 (9) ◽  
pp. 227-231 ◽  
Author(s):  
M. Marchesan ◽  
J. Morran
Keyword(s):  
Drinking Water ◽  
Profile Analysis ◽  
Water Industry ◽  
Australian Water ◽  
Standard Methods ◽  
Consumer Complaints ◽  
The Past ◽  
Polyethylene Pipes ◽  
Water And Wastewater ◽  
Flavour Profile

Over the past 9 years the Australian Water Quality Centre (AWQC) has conducted testing in accordance with Australian and New Zealand Standard AS/NZS 4020 - “Products for use in contact with drinking water” (1999). A test included as part of this standard is taste of water extracts. This test assesses the ability of products to impart discernible taste to drinking water using panellists trained in accordance with Standard Methods for the Examination of Water and Wastewater - Flavour Profile Analysis 2170 B (1999). Over 1000 products from companies worldwide, have been assessed at the AWQC in accordance with AS/NZS 4020 including pipes, valves, tap fittings and numerous other products used in contact with water. The products must not impart any discernible taste to obtain compliance and be deemed suitable for use in contact with drinking water. This study compiles the products assessed and the types of tastes obtained from both chlorinated and non-chlorinated extracts. In particular the study focuses on taste associated with polyethylene pipes, coatings and valves, which in some instances have been problematic. Analysis revealed that most taste problems occur when chlorinated water has been used in extraction experiments and this is in line with consumer complaints regarding taste imparted by plumbing products. The collation of this data provides a valuable assessment for manufacturers, the water industry and consumers.

scholarly journals Drinking water quality in Brazilian urban slums

2020 ◽  
Vol 15 (3) ◽  
pp. 1
Author(s):  
Natasha Berendonk Handam ◽  
José Augusto Albuquerque dos Santos ◽  
Antonio Henrique Almeida de Moraes Neto ◽  
Maria De Fátima Leal Alencar ◽  
Caroline Ferraz Ignacio ◽  
...  
Keyword(s):  
Water Quality ◽  
Drinking Water ◽  
Physicochemical Parameters ◽  
Quality Standards ◽  
Urban Slum ◽  
Drinking Water Quality ◽  
Water Quality Standards ◽  
Standard Methods ◽  
Water And Wastewater

   The study analyzed the quality of drinking water used in Brazilian urban slum residences according to the standards established in Brazilian regulations. Bacteriological (n=231) and physicochemical parameters (n=134) were analyzed, as the Standard Methods for the Examination of Water and Wastewater establishes. The results revealed that contaminants in the water consumed, for the most part, exceed the limits of drinking water quality standards, putting the population's health at risk and reinforcing the urgency of the need for public policies.

ION Exchange Characterisation of Modified Zeolite

1992 ◽  
Vol 26 (9-11) ◽  
pp. 2269-2272 ◽  
Author(s):  
Š Cerjan-Stefanovic ◽  
M. Kaštelan-Macan ◽  
T. Filipan
Keyword(s):  
Drinking Water ◽  
Ion Exchange ◽  
Anion Exchange ◽  
Natural Zeolite ◽  
Deionized Water ◽  
Isomorphous Substitution ◽  
Waste Waters ◽  
Modified Zeolite ◽  
Water Drinking

Isomorphous substitution of phosphorus into a natural zeolite affords the possibility to change the overall framework charge from negative to positive. The substances so created should be used for purification of waste waters. The work describes the preparation of phosphated zeolite, their characterisation and examples of their anion exchange of NO3 on observed in deionized water, drinking water and in the solution containing varying amounts of nitrate.

Resilience and Emergency Response for Drinking Water and Wastewater Utilities

2016 ◽  
Vol 2016 (8) ◽  
pp. 2048-2052
Author(s):  
David Goldbloom-Helzner ◽  
Brian Pickard ◽  
Dawn Ison ◽  
Lauren Wisniewski ◽  
Nushat Thomas ◽  
...  
Keyword(s):  
Drinking Water ◽  
Emergency Response ◽  
Water And Wastewater

scholarly journals Classificação da água subterrânea para uso na irrigação

2020 ◽  
Vol 34 (3) ◽  
Author(s):  
Erika de Almeida Sampaio Braga ◽  
Marisete Dantas de Aquino ◽  
Carlos Márcio Soares Rocha ◽  
Luzia Suerlange Araújo dos Santos Mendes ◽  
Rebeca Felipe dos Santos Silva
Keyword(s):  
Standard Methods ◽  
Water And Wastewater

Em regiões que sofrem de escassez continua de água, a instalação de poços é uma pratica comum. Embora seja um meio eficaz para a obtenção de água, esse método não garante a qualidade da água. No Estado do Ceará, predomina o embasamento das rochas cristalinas e, como consequência, as águas contêm elevadas concentrações de íons que conferem uma alta salinidade a água. Uma das utilizações dessas águas é para a irrigação e, águas com alta salinidade, causam danos às espécies vegetais. Por essa razão, torna-se necessário uma avaliação da qualidade da água para esse uso. O estudo foi realizado em águas subterrâneas captadas de poços localizadas em cinco localidades de dois diferentes municípios do Estado do Ceará. As amostras de água foram coletadas durante o período de janeiro a março de 2020 e os parâmetros selecionados foram cálcio, magnésio e sódio, para o cálculo da Razão de Adsorção de Sódio (RAS) e, a Condutividade Élétrica (CE), para fazer a classificação das águas, segundo os riscos de sodificação (sódio) e salinização. As análises seguiram as metodologias descritas no Standard Methods for the Examinations of Water and Wastewater (APHA, 2012) e foram realizadas no Laboratório de Química Ambiental da Fundação Núcleo de Tecnologia Industrial do Ceará (NUTEC). Conforme os resultados obtidos para as classes de risos, pode-se concluir que as águas subterrâneas estavam impróprias para o uso em irrigação, a não ser que precauções especiais sejam tomadas para o uso.

scholarly journals BACTERIOLOGICAL QUALITY EVALUATION AND WATERS CHLORINATION OF THE COLLECTIVE ALTERNATIVE SOLUTIONS (CAS) IN COMPLIANCE WITH HEALTH MINISTRY ORDONNANCE N ° 2914 OF DECEMBER 12, 2011

2018 ◽  
Vol 15 (29) ◽  
pp. 333-337
Author(s):  
C. C. M. SANTOS ◽  
J. T. M. PERESI ◽  
I. S. C. TEIXEIRA ◽  
S. I. L. SILVA ◽  
R. F. POVINELLI ◽  
...  
Keyword(s):  
Escherichia Coli ◽  
Water Quality ◽  
Quality Evaluation ◽  
Human Consumption ◽  
Health Ministry ◽  
Standard Methods ◽  
The Public ◽  
Enzyme Substrate ◽  
Water And Wastewater ◽  
Alternative Solutions

CAS correspond to the modalities of supply different from the public systems and have been monitored by the Program of Surveillance of the Water Quality for Human Consumption, aiming at the health protection. The free chlorine content (FC) reported with the sample Identification (N,N-Diethyl-1,4-phenylenediammonium - colorimetric) and 3703 bacteriological results (enzyme substrate technique - Standard Methods for Examination of Water and Wastewater (2005), IN the 102 municipalities covered by the (GVS 29) and 30 - Jales - SP (GVS 30) collected from 2011 TO 2016, were evaluated according to MS ordonnance No. 2914 of December 12, 2011. Of the 3670 samples from GVS region 29, 1648 (44.9%) were in legal disagreement in at least one of the parameters: FC and Escherichia coli being 1558 (94.5%) by FC and 148 (9.0%) by Escherichia coli. In the 33 samples (0.9%) from GVS 30, 3 (9.1%) were in disagreement with FC and 7 (27.5%) total coliforms, and 127 (12.6%) disagreed. (21.2%) was evidenced by coliforms, due to the inadequacy of the FC and the presence of fecal contamination indicators in the analyzed samples Results revealed the vulnerability of the water consumed by communities that use the CAS.

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