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Related Concept Videos

pH01:24

pH

The potential of hydrogen (pH) is a measure of the acidity or basicity of a water-based solution determined by the concentration of hydronium ions (H3O+). In one liter of pure water at neutral pH, there are 1×10−7 moles of hydronium ions. However, the extensive range of hydronium ion concentrations present in water-based solutions makes measuring pH in moles cumbersome. Therefore, a pH scale was developed to convert moles of hydronium ions into the negative logarithm of the hydronium ion...
Precipitation and Co-precipitation01:17

Precipitation and Co-precipitation

Precipitation and coprecipitation methods can be used to separate a mixture of ions in a solution. In qualitative inorganic analysis, ions that form sparingly soluble precipitates with the same reagent are separated based on the differences in solubility products. For example, consider the separation of Cu(II) and Fe(II) ions by precipitation as insoluble sulfides. First, copper(II) sulfide is precipitated by the addition of acidic H2S, where the dissociation of H2S is suppressed. Adding H2S...

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Construction of a Low-cost Mobile Incubator for Field and Laboratory Use
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Published on: March 19, 2019

Drinking water quality assessment.

J Aryal1, B Gautam, N Sapkota

  • 1Central Department of Environmental Science, Tribhuvan University, Kirtipur, Kathmandu, Nepal. jaryal@cdes.edu

Journal of Nepal Health Research Council
|January 3, 2013
PubMed
Summary
This summary is machine-generated.

Drinking water in Myagdi, Nepal, shows high arsenic and coliform contamination, posing a public health risk. While most physico-chemical parameters meet standards, microbiological quality requires urgent improvement to prevent diarrheal diseases.

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Published on: July 24, 2016

Area of Science:

  • Environmental Science
  • Public Health
  • Water Quality Assessment

Background:

  • Drinking water quality is a critical public health issue in Nepal, linked to diarrheal diseases.
  • Myagdi district exhibits a high prevalence of diarrhea, necessitating water quality assessment.

Purpose of the Study:

  • To assess the physico-chemical and microbiological quality of drinking water from various sources in Arthunge VDC, Myagdi district.
  • To compare water quality parameters with national and World Health Organization (WHO) guidelines.

Main Methods:

  • A cross-sectional study was conducted from January to June 2010, analyzing 84 water samples.
  • Standard techniques (APHA 1998) were used for physico-chemical and microbiological analysis.
  • Statistical analysis (SPSS 11.5) was performed, comparing winter and summer samples.

Main Results:

  • Most water samples met WHO and national standards for physico-chemical parameters, except for high arsenic levels (85.71%) and elevated pH (15.48%).
  • Total coliform contamination was prevalent in 86.90% of water samples.
  • No significant seasonal difference (P<0.05) was observed in physico-chemical parameters or total coliform counts.

Conclusions:

  • Drinking water in the study area exceeds national and WHO standards for arsenic.
  • Coliform contamination represents a significant microbiological problem in the drinking water supply.
  • Addressing coliform contamination is crucial for public health and reducing diarrheal disease incidence.