metals chemical analysis Articles

  • Origin and chemical partitioning of heavy metals in riverbed sediments

    Abstract: In the present investigation, bulk and chemical partitioning of elements in the Shefa-Rud riverbed sediments are studies. Higher concentrations of elemental concentrations have been observed in estuarine zone when compared with riverine sediments (except for Al, Fe, Pb and Mn). Manganese is mobilized under anoxic conditions prevailing in the Caspian Sea. Lithogenous materials are ...

  • Integration of polyelectrolyte enhanced ultrafiltration and chemical reduction for metal-containing wastewater treatment and metal recovery

    Chemical reduction was firstly employed to treat synthetic wastewaters of various compositions prepared to simulate the retentate stream of polyelectrolyte enhanced ultrafiltration (PEUF). With fixed Cu:polyethylenimine (PEI) monomer:dithionite molar ratio, increasing copper concentration increases copper removal efficiency. Under fixed Cu:dithionite molar ratio and fixed Cu concentration, ...


    By IWA Publishing

  • Integration of polyelectrolyte enhanced ultrafiltration and chemical reduction for metal-containing wastewater treatment and metal recovery

    Chemical reduction was firstly employed to treat synthetic wastewaters of various compositions prepared to simulate the retentate stream of polyelectrolyte enhanced ultrafiltration (PEUF). With fixed Cu:polyethylenimine (PEI) monomer:dithionite molar ratio, increasing copper concentration increases copper removal efficiency. Under fixed Cu:dithionite molar ratio and fixed Cu concentration, ...


    By IWA Publishing

  • Evaluation of Sampling and Field-Filtration Methods for the Analysis of Trace Metals in Ground Water

    Selected ground water sampling and field-filtration methods were evaluated to determine their effects on field parameters and trace metal concentrations in samples collected under several types of field conditions. The study focused on conditions where traditional approaches may produce turbid samples, which often leads to filtration of suspended particles from the sample before laboratory ...


    By QED Environmental Systems

  • Equilibrium analysis for heavy metal cation removal using cement kiln dust

    Ion exchange, reverse osmosis, and chemical precipitation have been investigated extensively for heavy metal uptake. However, they are deemed too expensive to meet stringent effluent characteristics. In this study, cement kiln dust (CKD) was examined for the removal of target heavy metals. Adsorption studies in completely mixed batch reactors were used to generate equilibrium pH adsorption ...


    By IWA Publishing

  • Analysis of Organic plating Bath Additives and Chemicals by Isocratic HPLC

    In today’s world, over 75% of all metal surfaces on manufactured metal “items” have some sort of plated finish on them. From highchromium steel car bumpers to zinc diecast toys to Silver-contact electronic components. While the primary composition of these plating baths are inorganic (the metals and salts that are used to make up the desired metal finish), almost all types of plating baths; from ...


    By Buck Scientific Inc

  • Chemical analysis of drinking water from some communities in the Brong Ahafo region

    This study consisted of the determination of the trace metals and some physiochemical properties in drinking water samples from the Brong Ahafo region of the Republic of Ghana, where drinking water samples are not treated before it is consumed. The purpose was to ascertain the quality of water from these sources. Samples were taken from fifteen sampling points and analyzed for the following ...

  • Analysis of the chemical form of iron in water pipes using XAFS measurements

    Yellow and red metal oxides are commonly found on deteriorated water pipes and it has been reported that their main component is iron. X-ray absorption fine structure (XAFS) spectroscopy is an effective method which can be used to measure the chemical form of metals. However, when the iron concentration in water samples is extremely low, XAFS measurement and analysis can be difficult due to so ...


    By IWA Publishing

  • Chemical analysis of drinking water of villages of Sanganer Tehsil, Jaipur District

    Abstract Due to pressure of human activity, urbanization and industrialization, the groundwater sources are degraded gradually; therefore pure, safe, healthy and odorless drinking water is a matter of deep concern. There are many pollutants in groundwater due to seepage viz. organic and inorganic pollutants, heavy metals, pesticides, fluorides etc. In Rajasthan state, all 32 districts are ...

  • Mercury Analysis

    Characteristics of Mercury What is Mercury? Mercury is a naturally occurring silver-colored metallic element noted for its occurrence as a liquid at room temperature and toxic to living organisms. This silvery, opaque liquid metal is very dense, yet has a high surface tension that causes it to form tiny perfect spheres in the pores of the rocks it is found in. It is ...


    By HORIBA Europe GmbH

  • Chemicals used for pH Adjustment

    The most commonly used neutralization chemicals for acid or base neutralization are 98% Sulfuric acid and 50% Sodium hydroxide. In many cases these are very good choices, however, there are many considerations when selecting chemicals and these may not always be the best selection. The selection of the chemicals used for the neutralization of an acid or base is almost as important as the design ...


    By Digital Analysis Corp.

  • Counting the costs of chemical incidents

    The consequences of a lack of control when using chemical substances in the workplace are well known and apparent.  Any health and safety expert can tell you of at least one major accident whereby poor chemical management policies and procedures have lead to disaster.  Examples include Bhopal, Grangemouth, Flixborough, Seveso and more recently, Buncefield.  Major accidents like ...

  • Exergetic analysis of glucose metabolism

    The aim of this work is to analyse exergetically the glucose metabolism, which involves the steps of Glycolysis, Krebs Cycle and the Oxidative Phosphorylation. In order to achieve these goals, a methodology for the exergetic analysis of metabolism is presented. The exergy value of the metabolic compounds takes into account the compounds concentration in the environment, ionic dissociations, metal ...


    By Inderscience Publishers

  • Characteristic of wastewater and their analysis

    Wastewater containing chromium and other heavy metals, is highly toxic effluents which require high-quality and efficient purification. Such effluents formed during electroplating, other types of chemical, electrochemical surface treatment of metal products such as chromium-plating, nickel-plating, copper-plating, zinc-plating, cadmium-plating and also during some technological ...


    By GlobeCore GmbH

  • Impact of heavy metals on the oil products biodegradation process

    Oil products continue to be used as a principal source of energy. Wide-scale production, transport, global use and disposal of petroleum have made them major contaminants in prevalence and quantity in the environment. In accidental spills, actions are taken to remove or remediate or recover the contaminants immediately, especially if they occur in environmentally sensitive areas, for example, in ...


    By SAGE Publications

  • Rapid Chemical Degradation Of Munitions Constituents

    PLANTECO Environmental Consultants, LLC is registered as an 8(a), Hubzone, SDB in the United States Central Contractor Registration (CCR). PLANTECO is recognized as a leader in providing sustainable technology consulting and engineered green remediation product applications. Dr. Valentine Nzengung, president of PLANTECO, has recently developed MUNOX®, a rapid in-situ chemical treatment process ...


    By Planteco, Inc

  • Removal of heavy metals from aqueous solution by limestone

    This study focused on the removal of Pb(II), Cd(II), Cu(II), and Zn(II) using reagent solutions by natural limestone in a batch system. The sorbent, collected from the Late Cretaceous limestone beds, Tunisia, was characterised by X–ray diffraction (XRD), chemical analysis (XRF) and infrared spectroscopy (FTIR). XRF showed that the studied limestone contained high amount of calcium carbonates. XRD ...


    By Inderscience Publishers

  • 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.

  • Determination of heavy metals in Iranian and imported black tea

    Tea (camellia sinesis) is one of the most popular beverages all over the world. It has originated from China long time ago. About 75% of the estimated 2.5 million metric tons of dried tea that are manufactured annually are processed as black tea which are consumed by many countries (Nas et al., 1993). Currently, consumption of tea as a soft drink is very popular in Iran and its production in 2006 ...


    By University of Tehran

  • Bringing powdered metal blending in-house, rotary-style

    When processing powdered metal compounds for products such as gyro rotors, flywheels, counterbalances, boring bars and grinding quills, the proportion of powdered metal ingredients must be precise, and the distribution of those ingredients 100 percent uniform. Mi-Tech Metals, Indianapolis, IN, has been manufacturing products from high-density tungsten-based alloys for more than 26 years, during ...

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