Water Analyses Articles

  • Minimum detection limits of several different elements in water and in oil

    Abstract  The minimum detection limits of several different elements in water and in oil solutions were determined on X-Calibur with a SDD detector installed or a Si-PIN diode detector installed. The MDL was determined at 3 sigma and 300 seconds acquisition times. The result is reported here. Objective  To perform a quantitative comparison between the ...


    By Xenemetrix Ltd.

  • P-METRIX - bringing edxrf lab analysis to the field

    The P-Metrix is wrapped in a portable case that acts as a self-contained EDXRF laboratory and allows you to roll it to any site for your elemental analysis test. P-Metrix, bridging new frontiers in lab-to-field analysis, will be presented at the 2017 ACS Spring Meeting, at San Francisco, April 2nd - 4th, booth # 1706. The analytical and industrial instrumentation from Xenemetrix range from ...


    By Xenemetrix Ltd.

  • A novel cloud point extraction method for separation and preconcentration of cadmium and copper from natural waters and their determination by flame atomic absorption spectrometry

    A sensitive and simple cloud point extraction method was developed for simultaneous separation and preconcentration of cadmium and copper prior to their determination by flame atomic absorption spectrometry. 4-phenyl-3-thiosemicarbazide was used as complexing agent and the cadmium and copper complexes were extracted from the aqueous phase by Triton X-114 surfactant. The effects of parameters ...


    By IWA Publishing

  • APSI mode simplifies MS spectral analysis

    Analysis of gaseous species by quadrupole mass spectrometry involves ionisation of the molecular species most typically by the electron bombardment technique, the ionisation process creating fragmentation ions additionally to the parent ion. Spectral interpretation can then be compromised by spectral interference in some gaseous mixtures. Hiden Analytical introduce the APSI(Appearance Potential ...


    By Hiden Analytical Ltd.

  • Detect Leaks and Analyze Water Consumption with WaterSignal

    Did you know it will cost an estimated $1 trillion over the next 25 years to upgrade the nation’s water system to run more efficiently? While part of the problem is fragile, hundred-year-old water mains, it also falls on property owners to ensure they are doing their part to save water — for both the environment and their wallets. But how? ...


    By WaterSignal

  • An optical method for characterizing carbon content in ceramic pot filters

    Ceramic pot filter (CPF) technology is a relatively common means of household water treatment in developing areas, and performance characteristics of CPFs have been characterized using production CPFs, experimental CPFs fabricated in research laboratories, and ceramic disks intended to be CPF surrogates. There is evidence that CPF manufacturers do not always fire their products according to ...


    By IWA Publishing

  • What’s Hiding in the Water?

    As we grow in understanding the significance different organisms have in the ecology of an environment, it helps tremendously if we knowwhich organismsinhabit that environment – whether they’re supposed to be there or not.  One method that is gaining widespread use, and relies on a simple filtration method, is the analysis of environmental DNA (eDNA) from local waterways. ...


    By Sterlitech Corporation

  • Multi-criteria analysis of site selection for groundwater recharge with treated municipal wastewater

    Geographic information systems (GIS) and remote sensing techniques are used as a decision support system to identify potential soil aquifer treatment (SAT) sites for groundwater recharge of Kerman aquifer, which is located in the southeast of Iran. These sites are identified using a single-objective multi-criteria analysis. To ensure technical feasibility, environmental sustainability, social ...


    By IWA Publishing

  • Culture-independent methods reveal high diversity of OXA-48-like genes in water environments

    The carbapenemase OXA-48 was identified for the first time in 2001 and is now one of the greatest concerns in terms of antibiotic resistance. While many studies report clinical OXA-48-like producers, few reports refer blaOXA-48-like genes in environmental bacteria. The main goal of this study was to evaluate the diversity of blaOXA-48-like genes in ...


    By IWA Publishing

  • Hydrochemical and multivariate analysis of groundwater quality in the northwest of Sinai, Egypt

    The northwestern coast of Sinai is home to many economic activities and development programs, thus evaluation of the potentiality and vulnerability of water resources is important. The present work has been conducted on the groundwater resources of this area for describing the major features of groundwater quality and the principal factors that control salinity evolution. The major ionic ...


    By IWA Publishing

  • 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 ...


    By IWA Publishing

  • Screening of organic pollutants in urban wastewater treatment plants and corresponding receiving waters

    There is a lack of knowledge in environmental pollution of the anthropogenic contaminants in wastewater and surface water. Several organic compounds merit special attention, because of their potential risk to the aquatic environment. Therefore, gas chromatography–mass spectrometry-based screening analyses were performed in order to identify anthropogenic organic contaminants and to reveal ...


    By IWA Publishing

  • Numerical modelling of air-water flows in sewer drops

    The presence of dissolved oxygen (DO) in water flows is an important factor to ensure the aerobic conditions recognised as beneficial to preventing the occurrence of detrimental effects. The incorporation of DO in wastewater flowing in sewer systems is a process widely investigated in order to quantify the effect of continuous reaeration through the air-liquid interface or air entrained due to ...


    By IWA Publishing

  • Get More Out of Water Resources Engineering Models

    by Venu Kandiah, PhD, P.E. Senior Water Resources Engineer The effort required to develop water resources engineering models can be significant. But once developed, in many instances the models are only evaluated for a limited, or a single set of conditions. The results and predictions obtained from these evaluations are the ones used in design, presented in reports and ...


    By XP Solutions

  • Get more out of Water Resources Engineering Models

    The effort required to develop water resources engineering models can be significant. But once developed, in many instances the models are only evaluated for a limited, or a single set of conditions. The results and predictions obtained from these evaluations are the ones used in design, presented in reports and conveyed to decision makers and the public. This approach might serve ...


    By XP Solutions

  • Quadratic head loss approximations for optimisation problems in water supply networks

    This paper presents a novel analysis of the accuracy of quadratic approximations for the Hazen–Williams (HW) head loss formula, which enables the control of constraint violations in optimisation problems for water supply networks. The two smooth polynomial approximations considered here minimise the absolute and relative errors, respectively, from the original non-smooth HW head loss function ...


    By IWA Publishing

  • Adsorption of Hg(II) from aqueous solution using functionalized hydrogel loaded with hydrous manganese dioxide particles

    In this paper, a high performance adsorbent (hydrous manganese oxides onto acylamino and hydroxyl functionalized hydrogel) containing manganese oxide was prepared by the cross-linking polymer; the novel composite adsorbent has an excellent adsorption for Hg(II) removal. The adsorbent was characterized by scanning electron microscopy and Fourier transform infrared analysis, the hydrogel ...


    By IWA Publishing

  • Prediction of groundwater levels using evidence of chaos and support vector machine

    Many nonlinear models have been proposed to forecast groundwater level. However, the evidence of chaos in groundwater levels in landslide has not been explored. In addition, linear correlation analyses are used to determine the input and output variables for the nonlinear models. Linear correlation analyses are unable to capture the nonlinear relationships between the input and output ...


    By IWA Publishing

  • Aquavalens: Use of new tools for improved treatment methods for the detection of pathogens in drinking water - Case Study

    Case: use of new tools for improved treatment methods for the detection of pathogens in drinking water The aim of Cluster 3 of the Aquavalens project is to use the newly developed analytical tools, technologies or platforms for the detection of microbial pathogens and indicators in practical settings. Within WP 10, these tests are performed in large drinking water systems located in the ...


    By microLAN B.V.

  • Rethinking micropollutant removal assessment methods for wastewater treatment plants – how to get more robust data?

    This paper covers the pitfalls, recommendations and a new methodology for assessing micropollutant removal efficiencies in wastewater treatment plants. The proposed calculation rules take into account the limit of quantification and the analytical and sampling uncertainty of measured concentrations. We identified six cases for which a removal efficiency value is reliable and four other cases ...


    By IWA Publishing

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