water treatment metal Articles
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Removal of Ni(II) from electroplating rinse waters using cation-exchange resins: batch and column studies
The adsorption of Ni (II) from nickel electro plating rinse water has been attempted. Indion 225 and Dueolite C 20 cation-exchange resins through batch and column mode for the recovery of Ni (II), which showed a remarkable increase in sorption capacity. On the basis of isotherm analysis, more efficient adsorbent is chosen for column mode adsorption studies. The continuous-flow study was to ...
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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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The binding of metal ions to molecularly-imprinted polymers
Imprinting polymerization is a flexible method to make resins specific for different compounds. Imprinting polymerization involves the polymerization of the resin in the presence of a template, here cadmium ions or arsenate. The template is then removed by washing, leaving specific binding sites in the resin. In water treatment, the removal of toxic metal ions is difficult due to the limited ...
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Metal ions biosorption from dilute aqueous solution
Biosorption, using non-living biomass (mostly suspended), is briefly reviewed in this paper as applied to toxic metal ions removal, with particular focus on the kinetics and engineering considerations of the process. Several diverse kinetic models were successful in fitting the experimental data. Evidence was provided that the metal biosorption (on Aeromonas caviae biomass) is a complex process. ...
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Biosorption of Pb(II) from synthetic wastewater onto Pseudomonas aeruginosa
The biosorption property onto Pseudomonas aeruginosa was represented by the Langmuir isotherm, and the maximum capacity of Pb(II) was 45 mg g−1 dry weight of bacteria at pH 5. The biosorption capacity of Pb(II) in a binary system increased with increasing Pb(II) concentration, from 0 to 50 mg l−1 in which Cr(III) existed at a constant concentration of 50 mg l−1. This result indicates that there ...
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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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Removal of Ni2+ from aqueous solution by rice bran
Rice bran, an agricultural by-product, was used for the sorptive removal of Ni2+ from aqueous solutions. Batch adsorption experiments were performed as a function of initial concentrations, contact time, pH and temperature. The experimental data were analysed by Langmuir, Freundlich and Redlich-Peterson isotherms. The equilibrium sorption capacity of Ni2+ was determined from the Langmuir equation ...
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Self-Cleaning Wedge Wire Screen Quotes
If your industry needs the filtration support of self-cleaning wedge wire screens, YUBO will provide you with a satisfactory quotation! “The Self Cleaning Wedge Wire Screen is an amazing product that has revolutionized many industries. It is a great way to save time and money while still providing superior performance.” Self-cleaning wedge wire screens are suitable for filtration in ...
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Adsorption of nickel and arsenic from aqueous solution on natural sepiolite
The adsorption capacity of a natural nanostructured clay (sepiolite) for the inorganic species: Ni2+ and As(V) has been studied using a batch method. The different parameters affecting sorption such as the mass of adsorbent, contact time, sorbate concentration or pH have been investigated and optimal experimental conditions have been determined. Langmuir and Freundlich equations, which are ...
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Chinese Nonferrous Metal Manufacturer Case Study
Industrial Wastewater Treatment Success Stories Chinese Nonferrous Metal Manufacturing Waste Water Treatment Great Results of Nonferrous Metals Manufacturer Jar Test Jar testing result of China Daye Nonferrous Metals Company, Hubei, China 碱性溶液（pH=9）raw water (pH 9) ...
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Cadmium removal from industrial effluents by cementation with zinc powder
This work presents the study of the cementation with zinc of a cadmium containing effluent, as an alternative process to chemical precipitation. The effluent, which was produced in the regeneration cycle of the ion–exchange columns of a metal plating waste–water treatment plant, contains: [Cd(II)] = 3500 mg/L; [Cr(III)] = 1230 mg/L; [Cu(II)] = 4575 mg/L; [Fe(II)] = 985 mg/L; [Zn(II)] = 325 mg/L ...
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The application of flotation for the downstream separation of metal-loaded microorganisms
The studied innovative wastewater treatment process involved the initial abstraction of heavy metal ions onto fungal or stalks biomass (biosorption), followed by the application of a typical flotation stage for the efficient downstream separation of metal-laden biosorbent particles. The ability of microorganisms to remove metal ions from dilute aqueous solutions is a well-known property. ...
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Biosorption of lead(II) by free and immobilised fungal biomass of Phanerochaete chrysosporium: a comparative study
An efficient metal biosorbent was developed by immobilising fungal biomass within matrix of loofa sponge (FBILS). At biosorption equilibrium FBILS removed 137 mg Pb(II) g-1, which was 24.3% greater than 110 mg Pb(II) g−1 free fungal biomass. The equilibrium biosorption data fitted well the Langmuir model. The experimental data, when applied to the pseudo-first and second-order kinetic models, ...
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Membrane contactors (NDSX and EPT): an innovative alternative for the treatment of effluents containing metallic pollutants
This work presents an overview of membrane–based solvent extraction technologies using membrane contactors as an innovative alternative for the remediation of effluents containing metallic pollutants. The discussion is focused on the description of Non–Dispersive Solvent Extraction (NDSX) and Emulsion Pertraction Technologies (EPTs). Three case studies are reported to demonstrate the viability of ...
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5 reasons water treatment (boiler feed/ cooling tower) is absolutely benefit for manufacturing units
Water treatment is highly essential for modern day production units. Everyone is aware of their relevance from environmental point of views. But, water treatment is equally effective in terms of optimizing the industry processing, safety and minimizing the expense. Exclusive ways against the most stubborn impurities: Water Treatment (Boiler Feed/ Cooler Tower) is one of the best ways of ...
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Biosorption of some heavy metal ions by local isolate of Zoogloea ramigera
Fourteen isolates of Zoogloea ramigera have been successfully isolated from organically polluted wastewater. The isolates were screened for their tolerance to three heavy metals (Cadmium, Chromium and Nickel) using plate diffusion method. Some of the isolates showed relatively high tolerance to the tested metals, while others showed a relatively low tolerance. These results are approved by a ...
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Case study: Printed Circuit Board Manufacturing
Aspocomp Ltd. is a Finnish leader in the manufacture of printed circuit boards (PCB), thick film hybrid circuits and mechanical assemblies for the electronics industry. Its main customers are European manufacturers of electronics equipment. Rather than producing and marketing its own products, Aspocomp relies on its customers who design the product and provide the specifications and drawings, ...
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Customized Melt Blown Filter Cartridge at Gopani
Gopani’s melt blown cartridge filters have a unique construction formed by thermally moulded polypropylene fiber layers that offer excellent depth filtration, higher filtration efficiency, long service life, and thermal stability. Only the best-quality FDA-certified materials are used to construct Gopani’s pp melt blown cartridge filter. The spun filter cartridges are best suited for ...
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Competitive removal of Cu–EDTA and Ni–EDTA via microwave-enhanced Fenton oxidation with hydroxide precipitation
Ethylenediaminetetraacetic acid (EDTA) can form very stable complexes with heavy metal ions, greatly inhibiting conventional metal-removal technologies used in water treatment. Both the oxidation of EDTA and the reduction of metal ions in metal–EDTA systems via the microwave-enhanced Fenton reaction followed by hydroxide precipitation were investigated. The Cu(II)–Ni(II)–EDTA, Cu(II)–EDTA and ...
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Competitive removal of Cu–EDTA and Ni–EDTA via microwave-enhanced Fenton oxidation with hydroxide precipitation
Ethylenediaminetetraacetic acid (EDTA) can form very stable complexes with heavy metal ions, greatly inhibiting conventional metal-removal technologies used in water treatment. Both the oxidation of EDTA and the reduction of metal ions in metal–EDTA systems via the microwave-enhanced Fenton reaction followed by hydroxide precipitation were investigated. The Cu(II)–Ni(II)–EDTA, Cu(II)–EDTA and ...
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