wastewater metals removal Articles

  • Wastewater Metals Removal

    Industrial Wastewater Treatment Success Stories Wastewater Treatment Metals Removal Ton Nerve Gas Agent Container Rinse Waters ...


    By Integrated Engineers Inc.

  • Optimizing Metals Removal

    Optimizing Wastewater Metals Removal Making Wastewater Metals Insoluble for Easy Removal To remove metals from wastewater, the metals need to be insoluble (not in solution). Many facilities, such as in the ...


    By Integrated Engineers Inc.

  • Removal of ionic metals from wastewaters of COD determinations

    Chemical Oxygen Demand (COD) determinations generate highly disruptive waste streams with chromium, mercury and silver. These should follow specific waste management approaches in search of environmental and economical benefits, for which this work reports simple chemical procedures allowing toxic metal removal. Chromium(VI) is reduced to chromium(III) and total chromium is precipitated with ...


    By Inderscience Publishers

  • Use of aquatic plants in removing heavy metals from wastewater

    Phytotechnologies involving use of plants for pollutant removal gained importance during the last two decades. Terrestrial and aquatic plants possess high metal sorption capacity, and hence find their use as inexpensive materials for removing metals from environment. Aquatic biomass irrespective living or dead, exhibits capacity to remove heavy metals from wastewater. The sequestration of heavy ...


    By Inderscience Publishers

  • 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

  • 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

  • Comparative evaluation of collectors for metal removal by precipitation/flotation

    This paper describes a comparative evaluation of collectors for metal removal by precipitation/flotation in samples of wastewaters from an electroplating industry. Precipitation/flotation was found to be successful over a great range of pH (3-12). The toxic metal ions lead (II), nickel (II), tin (II), iron (II) and aluminium (III) were stripped from contaminated industrial samples to ...


    By Inderscience Publishers

  • Removing Dissolved Copper from wastewater effluent

    Removing Dissolved Copper in Wastewater Treatment Plant How do you meet your dissolved copper discharge limit if it is 1.6 ppb, 3.1 ppb or 6.1 ppb? What is the cost to achieve these limits? Which treatment is cost effective? Is deionization, Reverse Osmosis or chemical precipitation the best alternative to low level of dissolved copper in a wastewater system? Is it cost effective to run a ...


    By Jenfitch, LLC

  • 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

  • Influent concentrations and removal performances of metals through municipal wastewater treatment processes

    This extensive study aimed at quantifying the concentrations and removal efficiency of 23 metals and metalloids in domestic wastewater passing through full-scale plants. Nine facilities were equipped with secondary biological treatment and three facilities were equipped with a tertiary treatment stage. The metals investigated were Li, B, Al, Ti, V, Cr, Fe, Ni, Co, Cu, Zn, As, Se, Rb, Mo, Ag, Cd, ...


    By IWA Publishing

  • Removing Struvite from wastewater systems

    Named after Henrich Christian Gottfried Von Struve, who discovered the magnesium ammonium phosphate crystals in medieval sewer systems in Hamburg in 1845, struvite is a major problem for waste water treatment plants. The hard, crystalline deposit forms scale on lines and belts, in centrifuges and pumps.  It also clogs system pipes and other equipment including anaerobic ...

  • 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

  • Metals & Finishing Industrial Wastewater Treatment

    Industrial Wastewater Treatment Success Stories Metals and Finishing Industrial Wastewater Treatment Aircraft Components - 80% Cost Reduction ...


    By Integrated Engineers Inc.

  • 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

  • Metal Processing Facility 2 Wastewater Treatment

    Integrated Engineers, Inc. conducted the below treatability on a Metal Processing facility that uses soluble metal cutting oils in their machining process; below are the results. The treatment required no pH adjustment from the 7.0 pH. The best product was treated with 0.679 grams of Floccin-HP (powdered) in a 100 ml sample and required moderate mixing. The dosage equates to a treatment of 56 ...


    By Integrated Engineers Inc.

  • Removal of COD, colour and heavy metal from wastewater using electro–chemical technique

    The effects of applied electric charge (0–200 Amp–min) and pH on the removal of colour and COD from textile wastewater have been analysed. Mild steel plates have been used as electrodes in both parallel and series connections. For colour and COD removal, four electrodes each with a surface area of 177.3 cm² and with inter–electrode distance of 2.3 cm in parallel connection ...


    By Inderscience Publishers

  • 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

  • The construction of an engineered bacterium to remove cadmium from wastewater

    The removal of cadmium (Cd) from wastewater before it is released from factories is important for protecting human health. Although some researchers have developed engineered bacteria, the resistance of these engineered bacteria to Cd have not been improved. In this study, two key genes involved in glutathione synthesis (gshA and gshB), a serine acetyltransferase gene (cysE), a Thlaspi ...


    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

  • 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

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