Showing results for: water analysis method Articles
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The Analysis of BTEX and MTBE Using Specially Modified Purge Traps
The existence of underground storage tanks containing gasoline and other petroleum products has facilitated the need for routine testing to determine if there has been any leakage into surrounding soil and ground water. The analytical methods test for “BTEX”, which is an acronym for benzene, toluene, ethyl benzene, and xylene. In many instances, testing is not limited to these ...
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Parameter identification of river water quality models using a genetic algorithm
For solving the multi-parameter identification problem of a river water quality model, analytical methods for solving a river water quality model and traditional optimization algorithms are very difficult to implement. A new parameter identification model based on a genetic algorithm (GA) coupled with finite difference method (FDM) was constructed for the determination of hydraulic and water ...
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Leakage estimation in developing country water networks based on water balance, minimum night flow and component analysis methods
Estimating leakage in developing countries’ water networks is challenging as accurate records are needed. Three leakage estimation methods were compared to ascertain which was most suitable for such networks. The factors accounting for the differences in application of these methods to water networks were also ascertained. The water balance and component analysis methods were compared with ...
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Comparing Oil in Water Analysis Methods
Wilks Enterprise has published a new White Paper that discusses various oil in water methods and their correlation with regulatory methods. While the amount of oil in water is highly regulated -- it can also be a challenging measurement. It is complicated by the fact that oil comes in many forms and the measurement is defined by the particular regulatory method. When EPA 1664 is the regulatory ...
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Investigation on Potential Groundwater Impacts and Influence of Local Hydrogeology on Natural Attenuation of Leachate at a Municipal Landfill
The influence of local hydrogeology on natural attenuation of contaminants from landfill leachates in shallow aquifer underlying the active Olusosun landfill base in Lagos was investigated. In addition, the level of groundwater contamination in the vicinity of the landfill and of leachate migration pattern in groundwater down gradient of the landfill base was equally assessed. Landfill leachate ...
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Application of nanofiltration for reuse of wastewater
The present research is a part of efforts to reuse wastewater by applying nanofiltration (NF) method for the secondary treatment of bio–treated wastewater and to check the quality of product water as irrigation water by using various analytical methods. For this, the performances of three different NF membranes (CK, GE–Osmonics; NF–270 and NF–90, Dow–FilmTech) were investigated using a cross–flow ...
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Matching oil in water analyses with regulatory methods
While the amount of oil in water is highly regulated, it can also be a challenging measurement. It is complicated by the fact that oil conies in many forms and the measurement is defined by the particular regulatory method. When EPA 1664 is the regulatory method, the "oil" is anything that is extracted into hexane and remains after the hcxanc has been evaporated and appears as weight. In regions ...
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Understanding Oil-in-Water Instrument Specifications
The measurement capabilities of oil-in-water analysis methods are described by several analytical figures-of-merit. Examples are: Range (Linear and Dynamic) Limit of Detection (LOD) Limit of Quantification (LOQ) Precision (Repeatability and Reproducibility) Sensitivity Accuracy Response Time Some or all of these are often specified by customers in the bid packages issued when selecting a ...
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Identifying the impact of Energy Base Water Project on groundwater using high-frequency monitoring data in the Subei Lake basin, Ordos, Northwestern China
Groundwater is increasingly exploited for energy production in arid regions, which necessitates a deeper insight into the impact of the enhanced human pressure on the groundwater. This study applied an integrated method (statistical analysis, water table fluctuation method, hydrograph analysis and remote sensing) to identify the impact of Energy Base Water Project on the groundwater in the ...
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Matching Oil in Water Analyses with Regulatory Methods - Case study
When analyzing oil and grease in water while out in the field, it is important to use an EPA approved method and equipment. While the amount of oil in water is highly regulated, it can also be a challenging measurement. It is complicated by the fact that oil conies in many forms and the measurement is defined by the particular regulatory method. When EPA 1664 is the regulatory method, the "oil" ...
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Oil in Water Analysis Method Match Regulatory Method - Case study
The analysis of oil in water is a worldwide problem that crosses many industries, analytical methods and regulatory agencies. For those in the petroleum industry, the offshore platform oil and grease limits for produced water can be quite different from the effluent coming out of the refinery. For the expanding hydraulic fracturing industry, oil in water limits are driven by whether the frac or ...
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Advanced Treatment of Produced Water for Crop Irrigation - Case Study
The Situation California is currently facing one of the most severe droughts in recorded history. In order to mitigate the drought conditions, various water conservation measures have already been implemented, and others are being considered. One method under consideration is using the advanced treatment of produced water to make it available for irrigation. A major challenge to the success of ...
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Will your oil in water analysis method match the regulatory method?
Anyone involved in field analysis of oil in water will continually get the question “Does your equipment match the regulatory method?” While the amount of oil in water is highly regulated -- it can also be a challenging measurement. It is complicated by the fact that oil comes in many forms and the measurement is defined by the particular regulatory method. When EPA 1664 is the ...
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Factors Affecting Oil in Water Testing Methods
Various factors need to be considered when comparing methods to measure oil and grease in water. Whether you are trying to meet effluent limits for an NPDES (National Pollutant Discharge Elimination System) permit, comply with oil and grease limits for the Clean Water Act (CWA), or an industry satisfying a POTW’s (Publically Owned Treatment Works) discharge permit, it is important to ...
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EPA Speeds Alternative Method Approvals
As anyone in the water business will tell you, standard analytical methods are critically important. On April 10, 2007, the EPA announced its intent to implement an expedited process for approving alternative analytical testing methods under various federal water programs. Background Under the Safe Drinking Water Act (SDWA), EPA promulgates national primary drinking water regulations (NPDWRs) ...
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Does sunlight change the material and content of polyethylene terephthalate (PET) bottles?
A simple water treatment process called SODIS (solar water disinfection) consists of filling polluted water in PET bottles that are exposed to sunlight for 5–6 hours. However, sunlight does not only destroy disease-causing microorganisms found in the water but also transforms the plastic material into photoproducts. Laboratory and field tests revealed that these photoproducts are generated at the ...
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Does sunlight change the material and content of polyethylene terephthalate (PET) bottles?
ABSTRACTA simple water treatment process called SODIS (solar water disinfection) consists of filling polluted water in PET bottles that are exposed to sunlight for 5–6 hours. However, sunlight does not only destroy disease-causing microorganisms found in the water but also transforms the plastic material into photoproducts. Laboratory and field tests revealed that these photoproducts are ...
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Designing monitoring programs for chemicals of emerging concern in potable reuse – what to include and what not to include?
This study discussed a proposed process to prioritize chemicals for reclaimed water monitoring programs, selection of analytical methods required for their quantification, toxicological relevance of chemicals of emerging concern regarding human health, and related issues. Given that thousands of chemicals are potentially present in reclaimed water and that information about those chemicals is ...
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An analytical method of regional water resources carrying capacity in karst area – a case study in Guizhou province, China
The uneven temporal and spatial distributions and the unreasonable development and utilization of water resources have caused increasingly severe water resources shortage around the world. Studying on regional water carrying capacity is beneficial for the optimal management of water resources, and can provide assistance for the sustainable utilization of water resources. The typical karst ...
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How Water Treatment Plants Protect Fish from Disruptive Synthetic Hormones
Scottish Water provides 1.34 billion liters of drinking water every day and takes away 847 million liters of waste water daily. Answerable to both the Scottish Parliament and the people of Scotland, Scottish Water recognizes that innovation is a key enabler for them to deliver sustainable, high-quality water treatment services. One of the many compounds they monitor for is the drug class of ...
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