heavy metals ions removal Articles
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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 ...
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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 ...
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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 ...
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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 ...
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A hybrid flotation: microfiltration cell for effluent treatment
The investigated hybrid cell combines the advantages of both flotation and membrane filtration, while overcoming their limitations and having as outcome clean water from wastewater. The specific objective of the current paper was to apply the process for the efficient separation of effluents containing toxic metals (zinc cations and chromate anions). The main examined parameters were the sorbent ...
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Removal of iron and manganese from aqueous solutions using carbon nanotube filters
Carbon nanotubes (CNTs) have become the focus of attention of many scientists and companies worldwide. CNT-based filters have a prospective advantage in comparison to the commercial filters already in operation because they are light weight and do not require electricity to operate. This investigation handles the filtration efficiency of manganese and iron from aqueous solution using ...
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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 ...
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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 ...
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Biosorption of lead (II) and cadmium (II) using
Escherichia coli genetically engineered with mice metallothionein IContamination 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 ...
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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 ...
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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 ...
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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 ...
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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 ...
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What Is High Voltage Pulsed Electrocoagulation by YASA ET?
YASA ET High Voltage Pulsed Electrocoagulation (HVPEC) technology generates an electrochemical reaction with the help of an external pulsed high voltage to convert electrical energy into chemical energy for the treatment of the most difficult wastewaters. High Voltage Pulsed Electrocoagulation (HVPEC) Overview A metal cation flocculant is produced by the sacrificial anode metal electrode, and ...
By YASA ET
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4 Benefits of Electrocoagulation for Heavy Metal Wastewater Treatment
There is much debate in academia, as to what elements should be considered “heavy metals”. Some criteria depend on density, some on atomic number, and some on chemical behavior. In the water treatment industry, we tend to concern ourselves with the more common and more toxic variety. Such heavy metals may include mercury, cadmium, lead, chromium, and copper. Arsenic is also ...
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