heavy metal level Articles

  • Heavy Metals in Waste

    Untitled Document Summary and discussion The aim of this report has been to demonstrate the existing knowledge regardng the harmful effects of heavy metals, the ...

  • Heavy metal levels in tap water in Batina Region, Oman

    Most household in Batina depend on private wells for their fresh water supplies. The quality of such water is not regulated or tested by authorities and, therefore, consumers' health might be at risk if water is contaminated. We assessed the contribution of some heavy metals to water pollution. Water samples from 364 houses were collected and analysed for levels of lead, chromium, nickel and ...


    By Inderscience Publishers

  • Heavy metal & hydrocarbon contaminated sludge

    Solidification of Heavy Metal & Hydrocarbon Contaminated Sewage Sludge Client: North Lanarkshire Council Project Managers: Jacobs Challenge: The former sewage treatment works were decommissioned in the 1970’s. It is thought that during the closure process, demolition material originating from the ...


    By Soilutions Ltd

  • Heavy metal removal - Case Study

    KDF 55 and 85 Provide Non-Chemical Water Treatment Media for Lead Removal and Other Heavy Metal Removal from Water In New Jersey's mercury contaminated groundwater - KDF media have been removing mercury to levels below the MCL since 1992. Redox media, non-chemical water treatment remove up to 98% of water-soluble cations (positively-charged ions) of lead, mercury, copper, nickel, chromium, and ...


    By KDF Fluid Treatment, Inc.

  • Bioaccumulation of heavy metals in some fauna and flora

    Bioaccumulation of heavy metals in fauna and flora in the Ijaw area of the Niger Delta of Nigeria were investigated. The fauna-molluscs and crustacea, and flora Hibiscus esculentus and vernonia amygdalina were selected for this study. Results show that Molluscs and crustacea accumulate considerable amounts of heavy metals. Higher levels of all the metals determined Hg, Pb, Cr, Cu, Ni, and Zn were ...

  • Heavy Metals Water Testing Powered by DNA

    Water pollution is a worldwide problem affecting developing and developed countries alike. Heavy metal contaminants are one prevalent type of water pollutant. They are persistent in the environment once d is charged and removal from source waters is necessary to ensure a clean drinking water supply. The problem of heavy metal pollution arises from several sources. Heavy metals such as uranium can ...


    By ANDalyze

  • ANDalyze - Real Time Testing for Heavy Metals - Whitepaper

    Whitepaper on DNAzyme heavy metals testing technology. Water pollution is a worldwide problem affecting developing and developed countries alike. Heavy metal contaminants are one prevalent type of water pollutant. They are persistent in the environment once discharged and removal from source waters is necessary to ensure a clean drinking water supply. The problem of heavy metal pollution arises ...


    By ANDalyze

  • Evaluation of toxicity of heavy metals for Escherichia coli growth

    Iron is an essential nutrient for living agents due to its noticeable activity in electron transport reactions in biological systems, but its insolubility and reactivity lead to problems of poor availability and toxicity, respectively (Andrews, 1998). Due to insolubility of this element at physiological pH all living agents have involved to use iron transport systems and storage proteins. ...


    By University of Tehran

  • Physiological sensitivity of freshwater macroinvertebrates to heavy metals

    Macroinvertebrate species traits, such as physiological sensitivity, have successfully been introduced in trait‐based bioassessment approaches and are important predictors of species sensitivity in the field. The authors ranked macroinvertebrate species according to their physiological sensitivity to heavy metals using toxicity data from acute laboratory assays. Rankings for each of the heavy ...


    By John Wiley & Sons, Ltd.

  • Survey of Heavy Metals in the Catfish Synodontis Clarias

    Elevated levels of heavy metals in the catfish Synodontis clarias can be a good indication of pollution of an aquatic ecosystem due to anthropogenic influence. The concentrations of Zn, Cd, Pb, Mn and Ni were determined in Synodontis clarias caught along a section of Taylor Creek and its associated tributaries. Samples were collected bimonthly between July 1999 and June 2000 in five stations. The ...

  • Accumulation of heavy metals in the bottom sediments of the Irkutsk Reservoir

    The chemical composition of the bottom sediment, and more particularly the heavy metals content, reflects human developments and impacts on the catchment and reservoir's natural environment. The bottom sediments of the reservoir retained by the Irkutsk Dam have been analysed. The reservoir is mainly supplied by water from Lake Baikal. The following amounts of heavy metals have been found in the ...


    By Inderscience Publishers

  • Spectroscopic study of the interaction of heavy metals with organic acids

    The ongoing progress in spectroscopic methods of analysis has resulted in a growing interest in the nature of pollutants and hence the possibility of controlling their levels in the environment. This paper describes a study of the fate of some pollutants in both soil and water at two selected areas in the north of Cairo, Egypt. Samples were collected from Shoubra Elkhima and Kafr ElSheikh during ...


    By Inderscience Publishers

  • Occurrence of Tributyltin Compounds and Characteristics of Heavy Metals

    Surface sediment samples were collected from Tanzanian major commercial ports and studied for the distribution and behavior of tributyltin (TBT) compounds and heavy metals. The content of TBT in sediments ranged from ND­3670 ng (Sn) g1dry wt (1780 ± 1720) (Mean ± SD) at Zanzibar and from ND­16700 ng (Sn)g1 dry wt (4080 ± 7540) at Dar es Salaam ports, respectively. Maximum TBT levels were ...

  • Plasma carotenoid levels are not directly related to heavy metal exposure or reproductive success in three insectivorous passerines

    The authors measured plasma carotenoid levels in three insectivorous bird species, the pied flycatcher (Ficedula hypoleuca), the blue tit (Cyanistes caeruleus), and the great tit (Parus major) in metal‐polluted and unpolluted sites around a copper smelter. Their aim was to determine whether there was interspecific, age‐related, or yearly variation in carotenoid levels and their responses to the ...


    By John Wiley & Sons, Ltd.

  • Preliminary assessment of heavy metals levels of soils of an oil field in the Niger Delta, Nigeria

    Abstract: This communication presents the results of preliminary investigation of the characteristic levels of heavy metals in surface soils of an oilfield in the Niger Delta. The results indicate higher concentration of the following metals: Cd, Pb, Cu; Ni, Zn, Cr, Mn and Hg in soils around the gas plant than the pipeline areas. There is a significant temporal and spatial variation in the ...

  • Results of heavy metals and other water quality levels in tap water from Çan sourced from Ağı Dağı (Mt. Ağı) (Çanakkale, Turkey)

    In this study, the concentrations of heavy metals Pb, Cu, Zn, Cd, Ni, Fe, Mn and Cr were determined using an inductively coupled plasma and optical emission spectrophotometer (ICP-OES), and water quality parameters pH, temperature, and conductivity were measured using the YSI 556 MPS water probe. The water samples were collected monthly from five different street tap water points sourced from ...


    By IWA Publishing

  • Heavy Metal Monitoring Around the Nesting Environment of Green Sea Turtles in Turkey

    Abstract  The concentrations of Cd, Pb, Fe, Cr, Ni, Se, Sb, As and Cu were investigated in the nesting environment of green turtles in Mediterranean Sea near Kazanlı, Mersin-Turkey. Tissues of plants growing on the beach and the adjacent environment, beach sand, sea ground sediment, sea grass as well as the egg shells from the nests were analyzed and the results showed no significant ...


  • Trace element and heavy metal concentrations in fruits and vegetables of the Gediz River region

    The Gediz river that irrigates the largest agricultural part of the Aegean Region's "Gediz Plain" is being polluted by industrial and domestic wastes starting from the Murat Mountain and continuing to the river's mouth. To study the pollution status, vegetables (tomato, pepper, bean, purslane, cowpea), fruits (apple, plum, pomegranate, walnut, watermelon, peach, cherry, grape), and leaf samples ...


    By Inderscience Publishers

  • Effects of single and combined heavy metals and their chelators on aphid performance and preferences

    When present at elevated levels in the environment, heavy metals are toxic for most organisms. However, so‐called hyperaccumulator plants tolerate heavy metals and use chelators for their internal long‐distance transport. Thus, phloem‐sucking insects may come in contact with the chelated metals. In this study, the effects of individual and combined heavy metals, zinc and cadmium, as well as of ...


    By John Wiley & Sons, Ltd.

  • Measuring heavy metal migration rates in a low-permeability soil

    Abstract Heavy metals at high concentrations are often toxic to living organisms, and their environmental toxicity depends on soil properties. It has long been thought that in clay-rich, low-permeability soils, heavy metals are bound to soil particles, and thus there are only few toxicity risks. This study questioned this perception and tested heavy metal mobility in such a soil, of the London ...


    By Springer

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