nitrate analysis Articles
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Automated Colorimetric Method for Nitrate Analysis
Several methods exist for determining nitrate in aqueous solutions. However, the most commonly performed USEPA-approved methods are problematic and can be unreliable. USEPA methods 353.1 nitrate Hydrazine Reduction1,2 and 353.2 nitrate Cadmium Reduction3 utilize chemicals that are carcinogenic and highly toxic. Hazardous waste is generated when performing these methods and disposal is costly. ...
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Assessment of catchment response and calibration of a hydrological model using high-frequency discharge–nitrate concentration data
This study uses a high-frequency discharge and nitrate concentration dataset from the Weida catchment in Germany for the catchment scale hydrologic response analysis. Nitrate transport in the catchment is mostly conservative as indicated by the nitrate stable isotope (δ15N and δ18O) analysis. Discharge–nitrate concentration data from the catchment show distinctive patterns, ...
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Nitrate Analysis of Water Samples Using a Benchtop UV-Vis Spectrophotometer
Nitrogen is naturally found in groundwater and surface water in the form of nitrate, nitrite, or ammonium. The EPA has established a maximum contaminant level of nitrate-nitrogen in potable water of 10ppm. This application presents results of UV-Vis analysis of nitrate concentrations in drinking water, ground water, and industrial wastewater, showing that the manual colorimetric method is ...
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Optimization of cyanide extraction from wastewater using emulsion liquid membrane system by response surface methodology
To solve the disposal problem of cyanide wastewater, removal of cyanide from wastewater using a water-in-oil emulsion type of emulsion liquid membrane (ELM) was studied in this work. Specifically, the effects of surfactant Span-80, carrier trioctylamine (TOA), stripping agent NaOH solution and the emulsion-to-external-phase-volume ratio on removal of cyanide were investigated. Removal of ...
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In-situ measurement of ammonium and nitrate in the activated sludge process
Abstract: A new in-situ probe is presented for the continuous measurement of ammonium and nitrate in wastewater. It requires no sample preparation and is installed directly in the process liquid. This new low- cost probe significantly reduces investment and operating costs and requires minimum maintenance. The paper describes the sensor principle and test results from three different probe ...
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Evaluation of regional groundwater quality using PCA and geostatistics in the urban coastal aquifer, East Coast of India
A systematic groundwater quality-monitoring program was conducted, and a total of 201 groundwater samples were collected. Multivariate and geostatistical techniques were employed to investigate major contamination types and its spatial characteristics in the study area. Principal Component Analysis (PCA) reveals that salinity (Factor 1) and nutrient (Factor 2) are very predominant contaminants in ...
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Free ammonia NH3-N (Total Nitrogen) measurement in municipal water districts - Case Study
Real-time continuous online measurement system for ammonia Low Initial Procurement Cost compared to competing technologies and offerings No need for chemical feed and rebuilding of sensors Lower Cost of Ownership due to very long sensor lifetime, low maintenance & cleaning requirements for inline, immersion & submersion ion selective sensors Intuitive and easy to use Rosemount 1056 ...
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Game theoretic analyses of nitrate emission reduction strategies in the Rhine river basin
Pollution of transboundary rivers requires cooperation between the countries involved in order to alleviate the consequences. This paper applies game theoretic analyses to nitrate emissions in the Rhine river basin. It assumes that the 50% emission reduction policy agreed upon by the International Rhine Committee is individually rational for each source. This enables the estimation of a revealed ...
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Nitrate Monitoring Simplifies Drinking Water Management
Nitrate in source water can be challenging to manage and lead to potential non-compliance issues. Continuous monitoring of nitrate enables you to keep a real-time pulse on nitrate concentrations from source water to finished water, offering many benefits: Compliance with drinking water standards for nitrate Optimized blending ratios to maximize water use Efficient nitrate treatment with ion ...
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Groundwater Nitrate Monitoring Applications
Nitrate in source water can be challenging to manage and lead to potential non-compliance issues. Continuous monitoring of nitrate enables you to keep a real-time pulse on nitrate concentrations from source water to finished water, offering many benefits: Compliance with drinking water standards for nitrate Optimized blending ratios to maximize water use Efficient nitrate treatment with ion ...
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Modelling nitrate pollution of groundwater using artificial neural network and genetic algorithm in an arid zone
This paper presents a hybrid approach to analyse nitrate pollution based on an Artificial Neural Network (ANN) and Genetic Algorithm (GA). This makes it possible to compute the amount of nitrate in different time-scales easily without employment of confusing complicated mathematical equations. Generally, the results of the current research could be useful in management purposes and also for ...
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Ammonia and nitrate measurement in municipal wastewater applications - Case Study
Advantages of the Advanced Sensor Technology real-time continuous online measurement systems for ammonia and nitrate Low Initial Procurement Cost compared to competing technologies and offerings No need for chemical feed and rebuilding of sensors Lower Cost of Ownership due to very long sensor lifetime, low maintenance & cleaning requirements for inline, immersion & submersion ion ...
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Measurement of Ammonia in Municipal Drinking Water for sterilization with Monochloramines
Real-time continuous online measurement system for ammonia Low Initial Procurement Cost compared to competing technologies and offerings No need for chemical feed and rebuilding of sensors Lower Cost of Ownership due to very long sensor lifetime, low maintenance & cleaning requirements for inline, immersion & submersion ion selective sensors Intuitive and easy to use TT-MA analyser ...
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How the Aquamonitrix real-time nitrate and nitrite analyser allowed a drinking water supplier to lift a long-standing Do Not Consume notice - Case Study
Compared with market-leading UV-based nitrate analysers, Aquamonitrix offers a key advantage in statutory limit monitoring applications at the outlet of drinking water treatment plants. In addition to providing high-accuracy, real-time nitrate monitoring, Aquamonitrix simultaneously provides a specific, high accuracy real-time nitrite measurement, with a lower limit of detection of just 0.05 ...
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Assessment of water quality in Little Vermillion River watershed using principal component and nearest neighbor analyses
Because of increased use of fertilizers to feed the increasing global population, the nutrient loads in surface and subsurface water have increased substantially in the last few decades. Many studies have been conducted to investigate the factors affecting nitrate load in surface and subsurface flow. The objective of this study is to investigate the relationship between the various factors ...
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Introducing the Knowledge Center
Want to learn more about analyzing critical fluids like lubrication oil? Check out our NEW Knowledge Center. Our mission at Spectro Scientific is to enable our customers to always make confident, knowledge-based decisions about their valuable assets and machinery. Whether you are testing motor oil, hydraulic fluid, fuel or coolant, we want to give you the information you need to make these ...
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The risk of cancer as a result of elevated levels of nitrate in drinking water and vegetables in Central India
The objective of the present study was to determine the effect of nitrates on the incidence of gastrointestinal (GI) cancer development. Nitrate converted to nitrite under reducing conditions of gut results in the formation of N-nitrosamines which are linked to an increased gastric cancer risk. A population of 234 individuals with 78 cases of GI cancer and 156 controls residing at urban and ...
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Rapid start-up of a nitrifying reactor using aerobic granular sludge as seed sludge
In this study, the effectiveness of aerobic granular sludge as seed sludge for rapid start-up of nitrifying processes was investigated using a laboratory-scale continuous stirred-tank reactor (CSTR) fed with completely inorganic wastewater which contained a high concentration of ammonia. Even when a large amount of granular biomass was inoculated in the reactor, and the characteristics of ...
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Nutrient removal from activated sludge mixed liquor by wastewater protozoa in a laboratory scale batch reactor
The aim of the study was to investigate the nutrient removal rate of three wastewater protozoan isolates. The study was carried out in a laboratory-scale batch reactor for a period of 120 h. in a four batch study. Aliquot samples were withdrawn from the reactor every 24 h. for the analysis of phosphate, nitrate, nitrite, ammonia, chemical oxygen demand, dissolved oxygen and pH, using standard ...
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Removal of NO3– from groundwater by PP-g-AA-Am non-woven fabric using fixed-bed column reactors
This study investigated the effect of PP-g-AA-AM non-woven fabric on the removal of nitrate nitrogen from groundwater. The breakthrough time was 1.5–2.6, 2.5–5.5, and 6.2–12.2 h for a superficial velocity of 2.0, 1.0, and 0.5 cm/s, respectively, for the nitrate nitrogen concentration in groundwater to satisfy the safe standard for drinking of 10 mg/L (as per the Ministry of ...
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