remove heavy metal ions Articles

Removal of lead(II) and copper(II) from aqueous solution using foitite from Linshou mine in Hebei, China

Foitite from Linshou mine in China's Hebei province was investigated as an adsorbent to remove Pb(II) and Cu(II) from aqueous solution. The results showed that foitite can readily remove heavy metal ions from aqueous solution. The data shows that the metal uptake for Pb(II) increases rapidly, accounting for 74.47% when contact time was 2 min. In contrast to Pb(II), there was a worse capability ...

Jan. 1, 2011

By IWA Publishing

In situ growth of monodispersed Fe₃O₄ nanoparticles on graphene for the removal of heavy metals and aromatic compounds

We report on the efficient removal of heavy metal ions and aromatic compounds from simulated wastewater with a nanocomposite. The nanocomposite was obtained via thermal decomposition of the precursor Fe(acac)3 onto the surface of graphene, modified by diethylenetriamine pentaacetic anhydride through dopamine. It was found that the maximum adsorption capacity of the nanocomposite toward ...

Dec. 13, 2013

By IWA Publishing

Biosorption of lead (II) and cadmium (II) using Escherichia coli genetically engineered with mice metallothionein I

Contamination caused by heavy metals in wastewater has a high potential of risk because they easily penetrate in to the trofic chain accumulating as organometallic compounds. In this work, the expression of mice metallothionein in E. coli (pMt-Thio) was examined as a strategy to enhance metal biosorption efficiency of bacterial biosorbents for Pb(II) and Cd(II) ions. The results showed that ...

Jan. 1, 2011

By IWA Publishing

Adsorption of heavy metal ions by natural and synthesised zeolites for wastewater treatment

The removal of heavy metal ions, Pb(II) and Cu(II), by adsorption using natural zeolite (NZ), synthesised zeolite (MCM-22) (SZ), and powdered activated carbon (PAC), were examined and compared. The influences of contact time, solution pH and adsorbate concentration have been tested in kinetic runs. The equilibrium sorption capacities of copper and lead ions on NZ, SZ and PAC were found to be ...

Jun. 8, 2009

By Inderscience Publishers

Preparation and adsorption properties of dialdehyde 8-aminoquinoline starch

Dialdehyde 8-aminoquinoline starch (DASQA) was synthesized by the reaction of dialdehyde starch (DAS) and 8-aminoquinoline and was used to adsorb various ions from aqueous solution. DASQA was characterized by Fourier transform infrared (FT-IR) spectra, thermogravimetric analysis, X-ray diffraction analysis. The adsorption properties of the polymer for Pb2+, Cu2+, Cd2+, ...

Nov. 20, 2012

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

Novel thermoresponsive assemblies of co-grafted natural and synthetic polymers for water purification

Water contamination and its purification are a global problem. The current approach to purify water is reduction of impurities to acceptable levels. One of the ways to achieve this is by use of water-soluble polymers that extract organic and metallic contaminants, from water. This paper presents a blend of composite polymers that eliminates both the contaminants simultaneously by the ...

Dec. 21, 2016

By IWA Publishing

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 H2O2 and NH3 were performed on these raw materials to ...

Oct. 3, 2012

By Inderscience Publishers

Innovative use of silvichemical biomass and its derivatives for heavy metal sorption from wastewater

Biosorption is a process of metabolism-independent, passive, physico-chemical binding of metal ions involving non-living biomass, which offers advantages over conventional methods because of cost-effectiveness, especially for dilute metal solutions, and minimal environmental impact. This paper reviews heavy metal biosorption using silvichemical-based biomass materials. It discusses the use of a ...

Oct. 17, 2008

By Inderscience Publishers

Researchers Develop Fast, Low-Cost Filtration Membrane

According to researchers, even water contaminated with heavy metals can be inexpensively cleaned with the aluminum oxide nanofilters. Aluminum oxide filters, created at room temperature, remove heavy metals 100 times faster than current filters Researchers at the University of New South Wales (UNSW) and the Royal Melbourne Institute of Technology (RMIT) in Australia have developed the ...

Oct. 22, 2018

By Fluence Corporation

Comparative studies on adsorptive removal of heavy metal ions by biosorbent, bio-char and activated carbon obtained from low cost agro-residue

In this study, Fe(III) and Cr(III) metal ion adsorption processes were carried out with three adsorbents in batch experiments and their adsorption performance was compared. These adsorbents were sesame stalk without pretreatment, bio-char derived from thermal decomposition of biomass, and activated carbon which was obtained from chemical activation of biomass. Scanning electron microscopy and ...

Oct. 5, 2015

By IWA Publishing

Pb and Co removal from paint industries effluent using wood ash

The release of heavy metals into the environment is a worldwide major concern. Different studies have demonstrated that natural agents have a high removal capacity for divalent heavy metal ions. Wood ash is a natural adsorbent and, in comparison with others, has a very low price. In this study, the removal of heavy metals (Pb and Co) from Binalood paint industry (Kerman, Iran) effluent was ...

Apr. 1, 2008

By Center for Environment and Energy Research & Studies (CEERS)

Effective removal of heavy metal ions from aqueous solutions using a new chelating resin poly [2,5-(1,3,4-thiadiazole)-benzalimine]: kinetic and thermodynamic study

A novel poly [2,5-(1,3,4-thiadiazole)-benzalimine] abbreviated as TDPI adsorbent was synthesized using simple polycondensation technique. The synthetic route involves the preparation of 2,5-diamino-1,3, 4-thiadiazole from 2,5-dithiourea and subsequent condensation with terephthalaldehyde. The resin was chemically characterized using Fourier transform infrared (FT-IR), 1H-NMR, and 13C-NMR ...

Oct. 8, 2015

By IWA Publishing

IX heavy metal removal from 35% MgCl2 - Russia, 900 m3/d - Case Study

Project Description: Lenntech has been awarded a contract for the engineering, manufacturing and assembly for a heavy metal removal ion exchange system, mainly iron should be removed. The system is installed in the Russian Federation. The treated 35% Magnesium Chloride solution is used for the production of chemicals. The water desalination system is equipped withtop brand instrumentation and ...

May 31, 2019

By Lenntech Water Treatment

Bioremediation of heavy metal contaminated aqueous solution by using red algae Porphyra leucosticta

Bioremediation is an effective process for the removal and recovery of heavy metal ions from aqueous solutions. In this study, red algae Porphyra leucosticta was examined to remove Cd(II) and Pb(II) ions from wastewater through biological enrichment and biological precipitation. The experimental parameters that affect the bioremediation process such as pH, contact time and biomass dosage were ...

Jul. 21, 2015

By IWA Publishing

Characteristics and adsorption study of the activated carbon derived from municipal sewage sludge

Sewage sludge-based activated carbon is proved to be an efficient and low-cost adsorbent in treatment of various industrial wastewaters. The produced carbon had a well-developed pore structure and relatively low Brunauer-Emmett-Teller (BET) surface area. Adsorptive capacity of typical pollutants, i.e. copper Cu(II) and methylene blue (MB) on the carbon was studied. Adsorptions were affected ...

Jun. 13, 2017

By IWA Publishing

Functionalized carbon nanotubes based filters for chromium removal from aqueous solutions

This investigation examines the filtration efficiency of chromium from aqueous solution using two types of commercial multiwalled carbon nanotubes (MWCNTs) (Taunit-M (TM) and Taunit-MD (TMD)). These MWCNTs were modified using two complementary treatments, purification (using a mixture of hydrochloric acid and hydrogen peroxide) and functionalization (using nitric acid). The effect of these ...

Jan. 20, 2017

By IWA Publishing

Cellulose bearing Schiff base and carboxylic acid chelating groups: a low cost and green adsorbent for heavy metal ion removal from aqueous solution

Chemically modiﬁed cellulose bearing metal binding sites like Schiff base and carboxylic acid groups was synthesized and characterized through Fourier transform infrared and solid state 13C–nuclear magnetic resonance (NMR) analysis. The chemically modiﬁed cellulose (Cell-PA) adsorbent was examined for its metal ion uptake ability for Cu(II) and Pb(II) ions from aqueous solution. Kinetic and ...

Jun. 28, 2016

By IWA Publishing

Surface modified polythiophene nanocomposite using HPC and DBSNa for heavy metal ion removal

In the present work, surface modified nanocomposite adsorbents polythiophene (PTh)/rice husk ash (RHA) have successfully been synthesized in the presence of hydroxyl propyl cellulose (HPC) and sodium dodecyl benzene sulfonate (DBSNa) as surfactants. The synthesized nanoparticles were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM) and Fourier ...

Mar. 13, 2017

By IWA Publishing