Heavy Metals Monitoring Articles

  • Life Among The Heavy Metals

    Authors in scientific and applied works interpret the meaning of the concept "heavy metals" in different ways. Today, they include more than 40 chemical elements with an atomic mass of more than 50 atomic units. An important role in the determination of heavy metals is played by the following conditions: their high toxicity in relatively low concentrations, and the ability to bioaccumulation. ...


    By Lumex Instruments Group

  • Case study - Kitsap transit avoids two engine failures in three months with on-site oil analysis

    Kitsap Transit is a public transportation agency, based in Bremerton, Washington and serving the county of Kitsap, which operates routed bus service, foot ferry service and service for elderly and disabled passengers. The agency has long been concerned with preventing engine failures and optimizing maintenance schedules for its fleet of approximately 362 pieces of equipment including transit ...


    By Spectro Scientific

  • Synthesis of chitosan zero-valent iron nanoparticles-supported for cadmium removal: characterization, optimization and modeling approach

    Herein, chitosan (CS) impregnated with nanoparticles of zero-valent iron (NZVI) was fabricated onto a magnetic composite of CS@NZVI as an adsorbent for cadmium (Cd2+) removal from aqueous solution. The characteristics of CS@NZVI were analyzed by Fourier transform infrared spectroscopy, X-ray diffraction, transmission electron microscopy, CHONS and Brunauer, Emmett and Teller techniques. The ...


    By IWA Publishing

  • Chemical and microstructural analyses for heavy metals removal from water media by ceramic membrane filtration

    This study aims to investigate the ability of low cost ceramic membrane filtration in removing three common heavy metals namely; Pb2+, Cu2+, and Cd2+ from water media. The work includes manufacturing ceramic membranes with dimensions of 15 by 15 cm and 2 cm thickness. The membranes were made from low cost materials of local clay mixed with different sawdust percentages of ...


    By IWA Publishing

  • Characterisation of septage in partially sealed cesspit

    The alteration of wastewater from an individual home under anaerobic conditions in a partially sealed cesspit over the filling period of four months, and the pollution fluxes were assessed. The septage was much more concentrated than raw wastewater. A mass balance found percentage (%) removal rates for biological oxygen demand (BOD5, 78%), chemical oxygen demand (COD, 62%), total nitrogen (TN, ...


    By IWA Publishing

  • Occurrence of heavy metals and contaminants on the surface of adjacent rivers

    Water is fundamental to the survival of living beings. It registers every impact and can function as an indicator of environmental stressors. Our objective in the current study was to assess the sanitary conditions of the waters in the Açude, Maria Lucinda and Santa Rosa streams. This was done by checking pH, running quantitative analyses of heavy metals and testing for total coliforms. The ...


    By IWA Publishing

  • Vibrating Screen Separators: Maintenance and Downtime Issues

    A vibrating screen separator is a big investment for any operation and an important part of your overall process. A good screening machine will be able to reliably meet your production goals while keeping your overhead costs to a minimum. The potential for maintenance and downtime are important considerations to factor into a new ...


    By VibraScreener Inc.

  • Removal of ammonium and heavy metals by cost-effective zeolite synthesized from waste quartz sand and calcium fluoride sludge

    This study focuses on the effectiveness of zeolite (10% CF-Z [0.5]) hydrothermally synthesized from waste quartz sand and calcium fluoride (CF) for ammonium ion and heavy metal removal. Zeolite was characterized through powder X-ray diffraction, Fourier-transform infrared spectroscopy, micromeritics N2 adsorption/desorption analysis, and field emission scanning electron microscopy. The effects ...


    By IWA Publishing

  • How to Choose the Right Machine for Screening Silica Sand

    Quickly and accurately screening silica sand is an important priority in a number of manufacturing processes. Your choice of screening machine will have a significant impact on the quality of product you deliver and, as a result, on your bottom line and long-term financial viability. There are a number of silica sand screening ...


    By VibraScreener Inc.

  • Thermal Analysis of Medical Materials

    Thermal analysis offers an accurate and cost-effective way to test materials that will be used for medical purposes. In a new live presentation, METTLER TOLEDO experts will review the benefits of various thermal analysis methods commonly used to test the properties, characteristics, and safety of potentially lifesaving new materials. METTLER TOLEDO is pleased to present ...


    By Mettler - Toledo Int. Inc

  • Removal of Hg(II) from aqueous solution using sodium humate as heavy metal capturing agent

    An environmental friendly and economic natural biopolymer-sodium humate (HA-Na) was used to capture Hg(II) from aqueous solutions, and the trapped Hg(II) (HA-Na-Hg) was then removed by aluminium coagulation. The best Hg(II) capturing performance (90.60%) was observed under the following conditions: initial pH of 7.0, coagulation pH of 6.0, HA-Na dosage of 5.0 g L−1, ...


    By IWA Publishing

  • 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

  • Hexavalent chromium removal by using synthesis of polyaniline and polyvinyl alcohol

    Over the past few years, heavy metals have been proved to be one of the most important contaminants in industrial wastewater. Chromium is one of these heavy metals, which is being utilized in several industries such as textile, finishing and leather industries. Since hexavalent chromium is highly toxic to human health, removal of it from the wastewater is essential for human safety. One of the ...


    By IWA Publishing

  • Which Metals are Green for Catalysis? Comparison of the Toxicities of Ni, Cu, Fe, Pd, Pt, Rh, and Au Salts

    Environmental profiles for the selected metals were compiled on the basis of available data on their biological activities. Analysis of the profiles suggests that the concept of toxic heavy metals and safe nontoxic alternatives based on lighter metals should be re-evaluated. Comparison of the toxicological data indicates that palladium, platinum, and gold compounds, often considered heavy and ...


    By SusChem

  • When It Comes to Screening Media, Quality Matters

    In precise industrial processes, all equipment and constituent parts must work together to drive performance and efficiency. For screening and sifting materials in the pharmaceutical, chemical, aggregate and other industries, your choice of media goes a long way toward determining the effectiveness of your machines. Even the best vibratory sifters are only ...


    By VibraScreener Inc.

  • Innovative decoloration and removal of heavy metal ions of waste water in textile, leather and paper industry with SERA CON C-BOR / SERA CON C-RAP

    Decoloration of waste water with SERA CON C-BOR / C-RAP – an easy process Official Comments strongest reduction agent resulting in a rapid and complete decoloration of dyestuffs that are sensitive to reducing agents. decoloration is based on a decomposition mechanism, i.e. after decoloration the dyestuffs ...


  • BLOOM Wastewater Sensor - Case Study

    Water is an integral input and vital strategic resource for the Ontario Food and Beverage Processing Sector. Water plays a variety of diverse and convergent functions. It is used for heating and cooling, blending, washing and rinsing, convey- ing, cleaning and sanitation – as well as being a vital product ingredient. However, the use of water inevitably leads to the generation of wastewater ...


    By MANTECH

  • Which is better for optimizing the biosorption process of lead – central composite design or the Taguchi technique?

    The aim of this study is to evaluate central composite design (CCD) and the Taguchi technique in the adsorption process. Contact time, initial concentration, and pH were selected as the variables, and the removal efficiency of Pb was chosen for the designated response. In addition, face-centered CCD and the L9 orthogonal array were used for the experimental design. The result indicated that, ...


    By IWA Publishing

  • Steam Turbine Rotor Transient Thermo-Structural Analysis and Lifetime Prediction

    Market requirements for faster and more frequent power unit start-up events result in a much faster deterioration of equipment, and a shorter equipment lifespan. Significant heat exchange occurs between steam and turbine rotors during the start-up process and even more intensive heat exchange takes place during the condensation phase in cold start-up mode, which leads to further thermal stresses ...


    By SoftInWay Inc.

  • Zinc removal from aqueous solution using novel adsorbent MISCBA

    Pollution caused by heavy metals has become a serious problem to the environment nowadays. The treatment of wastewater containing heavy metals continues to receive attention because of their toxicity and negative impact on the environment. Recently, various types of adsorbents have been prepared for the uptake of heavy metals from wastewater through the batch adsorption technique. This study ...


    By IWA Publishing

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