heavy metals from water removal Articles

  • Removal of heavy metals from samples of residual sludge

    Nitric acid leaching processes were evaluated for removal of heavy metals from samples of residual sludge from an industrial and municipal wastewater plant. The study showed that an acid:water ratio of 1:1 and a nitric acid concentration of 2 mol 1−1 gave efficient removal of 86.7%, 100% and 100% of copper, nickel and arsenic.Keywords: heavy metals, nitric acid leaching, ...


    By Inderscience Publishers

  • 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

  • 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.

  • Imprinted polymers for the removal of heavy metal ions from water

    In wastewater treatment, the removal of heavy metals is difficult due to the limited affinity of heavy metal ions to ion exchange resins. Here imprinting polymerization is used to develop resins with high capacity and selectivity for heavy metal ions for water treatment. A random copolymer of methacrylate and methacrylamide was found to be most effective for the removal of hydrophilic metal ...


    By IWA Publishing

  • Heavy metal removal from wastewater using various adsorbents: a review

    Heavy metals are discharged into water from various industries. They can be toxic or carcinogenic in nature and can cause severe problems for humans and aquatic ecosystems. Thus, the removal of heavy metals from wastewater is a serious problem. The adsorption process is widely used for the removal of heavy metals from wastewater because of its low cost, availability and eco-friendly nature. ...


    By IWA Publishing

  • Preparation and characterization of nanoporous resin for heavy metal removal from aqueous solution

    New nanoporous resin (NPR), based on organic xerogel compounds, was prepared at 150 °C by sol–gel method from pyrogallol and formaldehyde mixtures in water using perchloric acid as catalyst. NPR was characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction and nitrogen porosimetry. The metal uptake characteristics were explored using ...


    By IWA Publishing

  • The use of some industrial by products for adsorptive removal of heavy metals from wastewater

    Most available technologies applied in the removal of metal contaminants in aqueous systems use the well established processes of adsorption. Adsorbents currently in use are either too expensive or not readily available for wastewater treatment. There is a need to develop new adsorbents which are readily available at low cost to remove metal contaminants in aqueous system. In this work, Okra ...


  • Mechanisms of heavy metal removal using microorganisms as biosorbent

    Release and distribution of heavy metals through industrial wastewaters has adverse affects on the environment via contamination of surface- and ground-water resources. Biosorption of heavy metals from aqueous solutions has been proved to be very promising, offering significant advantages such as low cost, availability, profitability, ease of operation, and high efficiency, especially when ...


    By IWA Publishing

  • High-performance cellulose acetate/polysulfone blend ultrafiltration membranes for removal of heavy metals from water

    Neat cellulose acetate (CA) and CA/polysulfone (PSf) blend ultrafiltration membranes in the presence of polyvinylpyrrolidone as a pore former were prepared via a phase inversion technique. The prepared membranes were characterized by Fourier transform infrared, scanning electron microscopy, mechanical strength, water content, porosity, permeate flux and heavy metals (Pb2+, Cd2+, ...


    By IWA Publishing

  • Application of lactic acid bacteria in removing heavy metals and aflatoxin B1 from contaminated water

    In this study selected lactic acid bacteria (LAB, Lactobacillus acidophilus, Lactobacillus rhamnosus, Lactobacillus plantrium and Streptococcus thermophiles) and probiotic bacteria (Bifidobacterium angulatum) were tested for their ability in removing heavy metals (HM) including cadmium (Cd), lead (Pb) and arsenic (As) as well as aflatoxin B1 (AFB1) from ...


    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

  • Heavy metals removal from water by adsorption on propylthiol-functionalised mesoporous silica obtained by co-condensation

    Propylthiol-functionalised mesoporous silica SBA-15 prepared by co-condensation has been tested for heavy metal removal. Adsorption from aqueous solution was examined for Cu(II), Pb(II), Cd(II), and Hg(II). Adsorption isotherms were determined at 20°C and Langmuir and Freundlich models were fitted to experimental data. The results from adsorption experiments indicate that mercury is efficiently ...


    By Inderscience Publishers

  • Monitoring the effectiveness of advanced sorption materials for removing selected metals from water

    There are a number of ways to remove heavy metals from water. Sorption on granular media based on iron oxides and hydroxides is currently the most used option. The experiment was carried out using sorption materials GEH, CFH 0818, CFH 12 and Bayoxide, which are primarily designed to remove arsenic from water. Four columns were prepared with an inner diameter of 4.4 cm for the purpose of the ...


    By IWA Publishing

  • 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, Inc.

  • Removal of heavy metals (Cr, Cd, Ni and Pb) using fresh water algae (Utricularia tenuissima, Utricularia tenuis & Zygogonium ericetorum) from contaminated water

    A study was conducted to check the efficiency of different fresh water algae for removing heavy metals (Cr, Cd, Ni and Pb) from contaminated water. The three most abundant indigenous algal species namely Ulothrix tenuissima, Oscillatoria tenuis and Zygogonium ericetorum were collected from fresh water channels of Parachinar, Pakistan and brought to the laboratory of Soil and ...

  • Use of various agricultural wastes for the removal of heavy metal ions

    There is a need to develop innovative and alternative technologies that can remove toxic heavy metal pollutants from wastewater. In this study, two agricultural residues, cotton stalks and apricot seeds, were used to adsorb copper and lead in solutions. Sorption capacities of agricultural wastes were significantly affected by solution pH, adsorbent mass and adsorbent particle size. The adsorption ...


    By Inderscience Publishers

  • Phytofiltration of water polluted with arsenic and heavy metals

    This article reviews recent advances in phytofiltration of arsenic and toxic heavy metals from contaminated water ecosystems. Arsenic and metal contamination in drinking and non-drinking water has created global environmental health concerns. Phytofiltration using aquatic and terrestrial plants has promising potential for the ex situ and in situ clean-up of these waters. An arsenic ...


    By Inderscience Publishers

  • Rapid removal of heavy metal ions from aqueous solutions by low cost adsorbents

    In the present investigation, different agricultural solid wastes namely: eggplant hull (EH), almond green hull (AGH), and walnut shell (WS), that are introduced as low cost adsorbents, were used for the removal of heavy metals (cobalt, strontium and mercury ions) from aqueous solutions. Activation process and/or chemical treatments using ...


    By Inderscience Publishers

  • Sequestering of heavy metal ions from aqueous solutions by using a lignocellulosic material

    The ability of Brown Stock Washer (BSW) unbleached kraft pulp and Chemi-Thermo-Mechanical Pulp (CTMP) to sequester heavy metals was studied. The BSW pulp is chemically produced while the CTM one is produced by mechanical treatment aided by some chemicals. The two pulps were rendered in their protonated form and then equilibrated with two aqueous solutions of metals. One was ocean water and the ...


    By Inderscience Publishers

  • Removal of Lead from Gasoline

    On 12th March 1997, the European Commission adopted a proposal from the Environment Commissioner Ritt Bjerregaard on a European Union strategy to combat acidification. The strategy will, by 2010, reduce significantly the extent of the areas in the European Union where the tolerance of sensitive ecosystems to acidity is exceeded. Main elements of the strategy include establishment of national ...


    By The World Bank

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