Test Papers Articles

  • Tracer test and behavior of selected pharmaceuticals

    Study of the behavior and transport of pharmaceuticals in groundwater is significant for understanding the processes of natural attenuation and potential use of filtration through the aquifer to evaluate the most effective way to remove pharmaceuticals that occur under anthropogenic influence. This paper presents the results of a field experiment at the location of the drainage system of ...


    By IWA Publishing

  • Scientists, a new quota species?

    Globally, marine conservation is high on the agenda. The need to protect and conserve species and habitats from deleterious anthropogenic impacts has never been of more concern than it is currently. However, that is not to say we, as a society, are achieving effective marine conservation, in fact we are far from it. Global summits have come and gone, as have the targets they set for marine ...

  • Limit Risk and Enhance Balance Testing Ease with New White Paper

    Upgrade balance testing security and compliance with WeightLink, an innovative tracking system that assigns unique, scannable identifiers to each weight. Learn how quick weight identification and automated data gathering enhance balance testing by downloading our free white paper as part of METTLER TOLEDO's 2016 e-calendar. Adjustment and testing of lab balances can ...


    By Mettler - Toledo Int. Inc

  • New White Paper Describes How Verified Weight Identification Leads to Secure Traceable Balance Testing

    "Secure Traceability in Balance Testing - With Verified Weight Identification", the new White Paper from METTLER TOLEDO, explains how data entry errors and weight mix-ups can be avoided. WeightLink allows fast, secure balance testing with verified weight identification. Weights are the most important and most frequently used test equipment for the testing of balances. A ...


    By Mettler - Toledo Int. Inc

  • Pump it up: making single-pit emptying safer in rural Bangladesh

    Safe emptying and disposal of fecal sludge from pit latrines in rural areas has become a priority for the Government of Bangladesh. In this paper, we calculate the volume and characterize the hazards of managing sludge to identify technologies for safely emptying rural single pits. In Bhaluka subdistrict, an estimated 15,000 m3 of sludge is produced annually. Physical, chemical, and microbial ...


    By IWA Publishing

  • Real-time correction of antecedent precipitation for the Xinanjiang model using the genetic algorithm

    The Xinanjiang model has been successfully and widely applied in humid and semi-humid regions of China for rainfall–runoff simulation and flood forecasting. However, its forecasting precision is seriously affected by antecedent precipitation (Pa). Commonly applied methods relying on the experience of individual modelers are not standardized and difficult to transfer. In particular, the ...


    By IWA Publishing

  • Testing against “normal” with environmental data

    Normal ranges are some fraction of a reference distribution deemed to represent an expected condition (typically 95%). They are frequently used as the basis for generic criteria for monitoring programs designed to test whether a sample is outside of “normal”, as in reference condition approach studies. Normal ranges are also the basis for criteria for more classic environmental effects ...


    By John Wiley & Sons, Ltd.

  • A modified Green–Ampt model for water infiltration and preferential flow

    Preferential flow is significant for its contribution to rapid response to hydrologic inputs at the soil surface and unsaturated zone flow, which is critical for flow generation in rainfall–runoff (RR) models. In combination with the diffuse and source-responsive flow equations, a new model for water infiltration that incorporates preferential flow is proposed in this paper. Its performance in ...


    By IWA Publishing

  • Quantitative pipe condition assessment with Pipe Penetrating Radar

    Abstract Pipe Penetrating Radar (PPR) is the underground in-pipe application of GPR, a non-destructive testing method that can detect defects and cavities within and outside mainline diameter (>18 in / 450mm) non-ferrous (reinforced concrete, vitrified clay, PVC, HDPE, etc.) pipes. The key advantage of PPR is the unique ability to map pipe wall thickness and deterioration including voids ...


    By SewerVUE

  • Briefing paper: accelerating action to Save Peat for Less Heat!

    Emissions from drained and degrading peatlands (organic soils) amount to almost double the amount of CO2 emissions from aviation1, even when skyrocketing emissions from peat fires are not included. This briefing paper shows where the most urgent action is needed and presents a roadmap and policy recommendations for accelerating action. Peatlands cover only 3% of the global land surface. Some 15% ...


    By Wetlands International

  • Advancing the 3Rs in regulatory ecotoxicology: A pragmatic cross‐sector approach

    The ecotoxicity testing of chemicals for prospective environmental safety assessment is an area where a high number of vertebrates are used across a variety of industry sectors. Refining, reducing and replacing the use of animals such as fish, birds and amphibians for this purpose addresses the ethical concerns and the increasing legislative requirements to consider alternative test methods. ...


    By John Wiley & Sons, Ltd.

  • The Influence of Alkalising Amines on the Film Formation of Oleyldiamine Paper

    Summary The film formation of film forming amines (FFAs), commonly used as corrosion inhibitors in water/steam cycles, has been subject of various studies. However, less is known of the impact of alkalising amines (AA) on the film formation. AAs have a solubilising effect on the FFA and as a consequence might indirectly influence the properties of the ...


    By Kurita

  • Biodegradability and methane production from secondary paper and pulp sludge: effect of fly ash and modeling

    The effect of fly ash on biodegradability and methane production from secondary paper and pulp sludge, including its modeling, was evaluated. Three tests with fly ash concentrations of 0, 10 and 20 mg/L were evaluated at 32 °C. Methane production was modeled using the modified Gompertz equation. The results show that the doses used produce a statistically significant increase of ...


    By IWA Publishing

  • Productivity at the Commercial (or pay per test) Laboratory - White Paper

    Commercial environmental laboratories practice “applied analytical chemistry” by analyzing samples using a list of potential contaminants to determine how much, if any, of the pollutants are there. The data collected may be used by the laboratory’s client to, among other reasons, satisfy a regulatory permit, or for routine monitoring as required by a regulatory agency, such as ...

  • Adsorption of iron and manganese from acid mine drainage using 4A–zeolite synthesised from waste with high kaolin concentrations

    This research analysed the behaviour of heavy metals adsorption by zeolites and their associated applicability for treating acid mine drainage (AMD). The type 4A zeolite used was synthesised by a hydrothermal reaction using kaolin derived from the waste pulping process of white paper. For the development of kinetic studies of adsorption, samples were collected from AMD that were located in the ...


    By Inderscience Publishers

  • Forensic evaluation of multiple cracking of a concrete test cell built over an open graded aggregate base

    In August 2011 a test cell of 6 inch thick concrete surfacing placed over of special open graded Limestone aggregate base predominantly 8 inches (203 mm) thick was constructed at the MnROAD research facility. The two layers overlaid an existing 6 inch (150 mm) of MnDOT non–drainable aggregate base that overlaid a clay/silt sub–grade. In July 2012, an extensive cracking pattern was observed. This ...


    By Inderscience Publishers

  • New white papers added to the SPN1 Sunshine Pyranometer Online Resource Centre

    Two notable new research papers have been added to the fast growing SPN1 Sunshine Pyranometer online resource centre. The SPN1 Resource Centre is designed to help visitors fully understand the workings and benefits of the SPN1 (including calculation of DNI), and to provide access to the latest SPN1-related ...


    By Delta-T Devices Ltd.

  • PlumeStop Colloidal Biomatrix White Paper

    Securing rapid contaminant reduction and accelerated bioremediation using a dispersive injectable reagent Executive Summary PlumeStop Colloidal Biomatrix (PlumeStop) represents a new (patent pending) technology innovation designed to address the challenges of excessive time and end‐point uncertainty in groundwater bioremediation. The technology secures rapid ...


    By REGENESIS

  • Metal mixtures modeling evaluation: 1. Background

    Despite more than five decades of aquatic toxicity tests conducted with metal mixtures, there is still a need to understand how metals interact in mixtures and to predict their toxicity more accurately than currently is done. This paper provides a background for understanding the terminology, regulatory framework, qualitative and quantitative concepts, experimental approaches, and ...


    By John Wiley & Sons, Ltd.

  • Iron corrosion as a factor contributing to haloacetic acids formation in the distribution system: experimental assessment and model development

    In this paper, the results of an experimental investigation into four potential explanatory factors (i.e. Fe(II) ions, pH, phosphate and reaction time) with different levels, and their influence in the formation of haloacetic acids (HAAs) in water samples are presented. This study revealed that Fe(II) ions (p = 0.0001), phosphate based corrosion inhibitor (p = ...


    By IWA Publishing

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