Heavy Metals Removal Articles on Environmental XPRT

Heavy Metal Removal in a compact design

One of Wastech’s most popular standard products is the CWT-75. The CWT-75 is designed to treat small batches of rinse water – up to 500 gpd - with dissolved heavy metals of various concentrations and complexity. The system features a compact footprint, an ergonomical design with safety in mind, and ease of operation to deliver the same functionality of a large batch system at a ...

Jan. 5, 2009

By Wastech Controls & Engineering, Inc.

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 ...

May 25, 2016

By KDF Fluid Treatment, 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 ...

Oct. 3, 2012

By Inderscience Publishers

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, ...

Sep. 16, 2009

By Inderscience Publishers

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 ...

May 7, 2014

By IWA Publishing

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 ...

Dec. 3, 2009

By Inderscience Publishers

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 ...

Sep. 29, 2014

By IWA Publishing

Removal and bioaccumulation of heavy metals from aqueous solutions using freshwater algae

Four freshwater algae, including Cladophora glomerata, Oedogonium westii, Vaucheria debaryana and Zygnema insigne, were tested for their bioaccumulation capacity for cadmium (Cd), chromium (Cr) and lead (Pb) in a controlled environment with an average temperature of 18 °C, and light/dark duration of 12:12 h. Experiments were performed ...

Jan. 21, 2015

By IWA Publishing

Understanding the factors influencing the removal of heavy metals in urban stormwater runoff

In this research, an infiltration trench equipped with an extensive pretreatment and filter bed consisting of woodchip, sand and gravel was utilized as a low impact development technique to manage stormwater runoff from a highly impervious road with particular emphasis on heavy metal removal. Findings revealed that the major factors influencing the removal of heavy metals were the ...

Mar. 21, 2016

By IWA Publishing

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 ...

Jan. 1, 2011

By IWA Publishing

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 ...

Oct. 17, 2008

By Inderscience Publishers

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 ...

May 5, 2009

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 ...

May 11, 2015

By IWA Publishing

Removal performance of heavy metals in MBR systems and their influence in water reuse

The removal performance of heavy metals by two experimental full-scale membrane bioreactors (microfiltration and ultrafiltration) and the influence of activated sludge total suspended solid (TSS) concentration were studied under real operational conditions. Influent and effluent Be, Sc, V, Cr, Mn, Co, Ni, Cu, Zn, As, Mo, Cd, Ba, Sn, Sb, Pb and U concentrations were analysed by inductively ...

Jan. 11, 2013

By IWA Publishing

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 ...

Oct. 23, 2012

By Soilutions Ltd

Organic matter and heavy metal removals from complexed metal plating effluent by the combined electrocoagulation/Fenton process

In the present study, the treatment of metal plating wastewater containing complexed metals originating from the nickel and zinc plating process by electrocoagulation (EC) using stainless steel electrodes was explored. In order to improve the organic matter removal efficiency, the effect of H2O2 addition to the electrocoagulation (the combined EC/Fenton process) application was investigated. For ...

May 1, 2010

By IWA Publishing

Confirming Natural Attenuation Processes at a Coastal Site - Case Study

Past waste disposal practices at a California coastal site resulted in a groundwater plume containing CVOCs (mainly chlorinated ethenes [CEs] and 1,1-dichloroethane) migrating offshore towards a marine harbor. CVOCs are present in the sediment porewater adjacent to the shoreline, but concentrations decreased significantly between 2000 and 2015, and NA in the marine sediments was suspected. To ...

May 18, 2017

By SIREM

Oil Recycling - Case Study

The problem: Waste oil recycling contributes very much to climate protection through (CO2) energy saving. Compared to the production of base oil the re-refining of waste oil uses 34 % less resources. In the sixties the German government was subsidising the re-refining of waste oil. Because of that the use of waste oil as a fuel was neglected. The used oil re-refining is the ...

May 16, 2017

By Dirk European Holdings LTD

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 ...

Jul. 11, 2012

By ANDalyze

Biosorption of heavy metals by utilising onion and garlic wastes

Onion (Allium cepa L.) and garlic (Allium sativum L.) wastes from market and food canning processes were used for adsorption of Pb2+, Sn2+, Fe2+, Hg2+, As3+ and Cd2+ from ...

Dec. 10, 2012

By Inderscience Publishers

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