Water quality is about the chemical and biological constituents of water. It comprises: 1) Water chemistry data compilations; 2) Development of reliable sampling and analytical protocols; 3) Research about water-rock, water-soil and water-atmosphere interactions; 4) Identification of water-contamination sources; 5) development of remediation strategies for poor-quality water. Water quality often means the difference in constituent concentrations between field samples and standard concentrations set by governmental authorities to protect human and ecosystem health. It is distinct from water quantity, which is broadly equivalent to physical hydrology.

• Egil T Gjessing

  Why does the colour in surface water increase in the Sub Arctic Zone?

  Since the mid 1970s there has been an increase in the natural coloured organic matter in surface water in the Northen Hemisphere. This partly due to climate change (temperature, amount and qualitySince the mid 1970s there has been an increase in the natural coloured organic matter in surface water in the Northen Hemisphere. This partly due to climate change (temperature, amount and quality of precipitation and global radiation). Are there other explanations? Egil Gjessing

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  • 
    Sanket kumar Saxena replied

    Due to initial phase of algal bloom or concentration of dirt and dust accumulation with the involvement of algae.

    5 hours ago
• Kestle Tamayo

  How do you determine fulvic or humic acids in surface water using UV spectroscopy

  Instead of TOC analysis, I would like to use UV spectroscopy to determine Natural organic matter in water based on the humic and fulvic acids present in water. What will be the method for analysis?Instead of TOC analysis, I would like to use UV spectroscopy to determine Natural organic matter in water based on the humic and fulvic acids present in water. What will be the method for analysis? What will be the standards that will be used for the analysis? where can I possibly by them?

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    Egil T Gjessing replied

    There is a very good correlation between DOC and UV 254 nm ads. Regarding standards, see IHSS on Internett

    2 days ago
• Priadie Bambang

  What is the role of bacteria in lake bioremediation

  eutrophication, high BOD COD, low transparancy

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    Mohammad Firoz Khan replied

    " Bioremediation" is positive term and in the post perhaps it is used to mean as how bacteria may help in stopping eutrophication, and bring dissolved oxygen level to the lvel making lake water" Bioremediation" is positive term and in the post perhaps it is used to mean as how bacteria may help in stopping eutrophication, and bring dissolved oxygen level to the lvel making lake water ecosystem suitable for higher lifeforms as fish etc. But first response points out only the mechanism lack of which causes all the problems enumerated in the original post, perhaps known to the person who has posted this querry. We all are interested in knowing how the bacteria may be helpful in restoring the lake to its origional conditions and its optimum ecological services.

    7 days ago
• Kaveh Kheirkhah Rahimabad

  re...

  Whats a formola of BOD10??

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    Reena Sharma replied

    Is the method of measuring BOD10 similar as for BOD3 at 27C incubation for 3 days.

    7 days ago
• Sirinimit Boonyuen

  What are the impacts from coal barge accident on water quality?

  Coal barge collision or accident may cause the impact on the coastal water quality. Can you reccomend any literature on this topic?

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    Reena Sharma replied

    May cause rise in carbonate content in water.

    7 days ago
• Sunita umesh g

  Any lab methods to calculate % of oil and grease removal form garage waste water?

  I have used hexane as a solvent to extract oil and grease from waste water, rather than this any lab methods are their?

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  • 
    Reena Sharma replied

    You can consult APHA 2005 for methods.

    7 days ago
• Hassan Rabiu

  I am assessing the quality of water dam water use by the neighbouring communities in the Kano State in Nigeria.

  Can you give advice for how I should conduct the preliminary physico-chemical and biological quality assessment of a water dam water in Kano, Nigeria? Thanks

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    Reena Sharma replied

    You should include phosphates, sulphate and DO along with above mentioned parameters.

    7 days ago
• Dulishiaka Athukorala

  Looking for a simple method for identification of sulfur-reducing bacteria

  I want identify the relationship between iron-sulfur bacteria algae and manganese and iron deposition in water and would like a simple method for the identification of sulfur reducing bacteria. HowI want identify the relationship between iron-sulfur bacteria algae and manganese and iron deposition in water and would like a simple method for the identification of sulfur reducing bacteria. How can I control this process?

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    Juan Pedro Maestre replied

    Extract DNA and send for Pyrosequencing. Not expensive and you will get taxonomic identification.

    21 days ago
• Ines Mulder Kannewischer

  Is there a convenient method to determine H2O2 and Cl2 in the field? (besides Test Stripes)

  Does anyone know about a reliable detection of H2O2 and cl2 with a handheld device such as electrodes? The systems we are looking at are especially rich in Cl-, so if possible the method should notDoes anyone know about a reliable detection of H2O2 and cl2 with a handheld device such as electrodes? The systems we are looking at are especially rich in Cl-, so if possible the method should not have a problem with a saline matrix.

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    Ines Mulder Kannewischer replied

    I actually am looking for a way to determine elemental chlorine Cl2!! I know about ion selective ions and the Cl- ions, but am not interested in determining Cl-. Thanks anyway.

    24 days ago
• Ovais Ashraf

  How can we perform ground water quality mapping through remote sensing?

  Please provide information regarding methodology to be opted for ground water quality mapping through use of remote sensing technology.

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    Mohammad Firoz Khan replied

    i do agree that remote sensing and GIS have their limitations. It is why I suggested integration of remote sensing data with required data from other sources. Hydrogeological data may be generalisedi do agree that remote sensing and GIS have their limitations. It is why I suggested integration of remote sensing data with required data from other sources. Hydrogeological data may be generalised on the basis of borehole log data, hydrolic conductivity depends on the texture of soil and results of experiments conducted in different types of soils may be generalised for the whole region. Water table may also be determined and generalised by establishing relationship between image reflectance and depth to water level from the field. The question is assessment of level vulnerability not that of groundwater modelling. On the other hand, field survey gives more accurate results the why use aerial photography and remote sensing either for mapping an area or incorporating changes because aerial photographs and remote sensing images are processed for rectification of several different errors. I also suggested use of experimental data to validate ones results of vulnerability assessment using remote sensing information integrated with data from other sources. If results are validated by experimental data with a degree of conviction, one may continue to use this method otherwise to definitely falsify a possibility is a matter to rejoice. You might be aware to get any type of data in our country is difficult especially geophysical data obtained using sophisticated aerial electromagnetic surveys.

    Apr 11, 2012
• Akram Ansari

  Chemical method for Iron removal from drinking water

  Can you recommend articles on a chemical method for iron removal from drinking water?

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  • 
    Prof. Zoran Vujcic replied

    zero or Fe2+

    Apr 5, 2012
• Paola Buscarinu

  Does anyone how to prepare a sample of elutriate?

  A sample of elutriatre is a particular sample for the determination of ecotoxicology in a sediment of river or lake

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  • 
    Susana Loureiro replied

    If you mean a soil or sediment elutriate you can check my paper, where I did that for soil from a mine and test its toxicity to Daphnia and Microtox: Loureiro S., Ferreira A.L.G, Soares A.M.V.M,If you mean a soil or sediment elutriate you can check my paper, where I did that for soil from a mine and test its toxicity to Daphnia and Microtox: Loureiro S., Ferreira A.L.G, Soares A.M.V.M, Nogueira A.J.A (2005) Evaluation of the Toxicity of Two Soils from Jales Mine (Portugal) Using Aquatic Bioassays. Chemosphere. 61, 168-177 . Link: http://dx.doi.org/10.1016/j.chemosphere.2005.02.070 Hope it helps! Susana Loureiro investigadora | researcher membro da Comissão Executiva do dbio | member of board of directors of dbio Departamento de Biologia & CESAM, Universidade de Aveiro 3810-193 Aveiro, Portugal for cv overview: http://www.cesam.ua.pt/susanaloureiro; http://www.degois.pt/visualizador/curriculum.jsp?key=6613746719469447 for citation metrics: http://www.researcherid.com/rid/B-4462-2008

    Apr 4, 2012
• Juliet Osei

  I would like to know new and innovative ways of removing fluoride from drinking water

  Any ideas?

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  • 
    NABA KUMAR Shukla replied

    If it is not the extraneous fluoride due to fertilizer application or industrial effluent the best and sustainable method is to augment the recharge to the aquifer by artificial means. It has beenIf it is not the extraneous fluoride due to fertilizer application or industrial effluent the best and sustainable method is to augment the recharge to the aquifer by artificial means. It has been seen that the fluoride concentration in the ground water is higher in the pre monsoon than that in the post monsoon.

    Apr 3, 2012
• Barry Kuttner

  What is the best method of home water purification?

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  • 
    Sanket kumar Saxena replied

    Dropwise passing the water on the bed of gravel and sand.but not for microorganisms such as bacteria,viruses

    Mar 29, 2012
• Devendra Pandey

  IJRCE108 _114-118_.pdf