Natural waters
Speciation of metals in natural waters
... from 0 to 2 m. Clegg and Whitfield 28 have developed a major seawater model that they use to examine the dissociation of ammonia over the same temperature range. The extension of the Pitzer 16 model for divalent and ...
8
Determination of the fenvalerate insecticide in natural waters by a photochemically-induced fluorescence method
... from natural waters (well, riv- er, sea, and draining waters), located within the agricultural Niayes ...of natural water samples were spiked in flasks with known fenvalerate con- centrations ...
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The proteolytic and saccharolytic activity of some natural waters and their associated bacteria
... from natural waters facilitate identification by comparison with standard keys such as those developed by Bergey (Buchanan and Gibbons, 1974) or Shewan et al (1960) for ...
370
Fluorometry in application to fingerprint of petroleum products present in the natural waters
... Two lubricant oils which are representative of marine ship engine systems were applied: Marinol 1240 and Cyliten N- 460. Marinol, in comparison with Cyliten, visually exhibits a brighter shade of brown and is relatively ...
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Speciation analysis of trace metals in natural waters using vibrating electrodes
... in natural waters typically makes use of diethylenetriaminepentaacetic acid (DTPA) which forms a species with Cr III that adsorbs on a hanging mercury drop electrode (HMDE) (Boussemart et ...
161
GA Fuzzy Decision Support System for Mercury Removal in Natural Waters
... The idea of this research is to apply sustainability and augment efficiency of the aquatic systems by intelligent tools. This paper exploits fuzzy logic approach as a flexible methodology for providing supplementary ...
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Solvolysis kinetic study and direct spectrofluorimetric analysis of the fungicide benomyl in natural waters
... A direct spectrofluorimetric method for the quantitative analysis of benomyl in natural waters is described here. Benomyl is an unstable, fluorescent fungicide that mainly decomposes into carbendazim and ...
12
Activity of zero-valent sulfur in sulfidic natural waters
... with respect to colloidal sulfur, which will precipitate at least initially as nanoscale, supercooled droplets of liquid sulfur [43,44]. The value of 1.22 is based on an experi- mental determination of the solubility of ...
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The incidence and health burden of earaches attributable to recreational swimming in natural waters: a prospective cohort study
... Methods: Prospective cohort studies were conducted at four freshwater and five marine sites in the United States and Puerto Rico. Beach visitors were enrolled on summer weekends and holidays. Ten to twelve days after the ...
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How long do natural waters “remember” release incidents of Marcellus Shale waters: a first order approximation using reactive transport modeling
... produced waters can impose risks on natural water ...Shale waters (MSW) into natural ...and natural water ...of natural water systems (aquifers and rivers) in Bradford County, ...
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The Hydrogen Ion Concentration of Natural Waters I The Relation of pH to the Pressure of Carbon Dioxide
... 4: 1 that solutions of calcite behave in the same way as solutions of pure sodium bicarbonate; 2 that natural waters which usually contain a mixture of the bicarbonates of calcium and ma[r] ...
27
Determination of chromium in natural waters by flow injection inductively coupled plasma emission spectrometry
... esturine waters are significantly in excess of the natural mobilisation figure, and where speciation levels have been determined significant fractions of chromium (VI) have been ...
136
IMPACT OF HYDRAULIC FRACTURING ON THE QUALITY OF NATURAL WATERS
... The current regulations which are in force in many areas may be used efficiently for the assess- ment of the shale gas extraction impact, but the novelty of hydraulic fracturing process requires devising dedicated ...
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Optical Chemical Sensor for Screening Cadmium (II) in Natural Waters
... The quantitative determination of CdII is dependent upon the volume of the equilibrating solution, the amount of CdII required in the optode matrix to produce detective response and CdII[r] ...
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Determination of the domplexing capacity of natural waters
... A conventional differential pulse polarogram of sample 11-3 is shown in figure 9, the semi-automatic output of this sample is shown in figure 10.. Clearly the peak current and basel[r] ...
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Alkalinity and Hardness of Natural Waters in Chittagong City of Bangladesh
... Alkalinity and hardness often used exchangeable when discussing water quality. These collective properties of water share some resemblances but are distinctly different but both has high mineral content. Generally, the ...
14
Studies of metal-organic interactions with model synthetic and natural ligands applicable to natural waters
... Cu(I) speciation in bathocuproine (B) titrations of Cu(I) and phytochelatin based on the conditional stability constants obtained in Cu(I) titration experiments. Experimental data : (e[r] ...
241
Applications of Radiation Chemistry to Understand the Fate and Transport of Emerging Pollutants of Concern in Coastal Waters
... of natural waters is attained through a variety of chemical reactions and physiochemical processes, such as acid-base reactions, gas- solution processes, precipitation and dissolution of solid phases, ...
137
Analytical Errors in the Determination of Inorganic and Organic Phosphorus in Waters Based on Laboratory Experiences
... Eutrophication is a growing problem globally and has been resulting in signifi- cant ecological and socio-economic consequences [1] [2] [3]. The addition of excess P to natural waters is one of the world’s ...
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Assessing the leaching behavior of different gunshot materials in natural spring waters
... Since recent studies have demonstrated that the main component is not always the main driver of the envi- ronmentally relevant impact of a shot material [7, 8, 35, 36, 41], standardized experimental leaching tests for ...
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