Using of wooden sawdust for copper removal from waters

Abstract The heavy metal removal from wastewater is very important due to their persistent character in aquatic environment. The use of wooden sawdust is emerging as a potential alternative to the existing conventional technologies for the removal of metal ions from aqueous solutions. The aim of this work is to study the Cu(II) removal of from water by unconventional waste products including the wooden sawdust of poplar, cherry, spruce and hornbeam. The FT-IR spectra of the studied wooden sawdust confirmed the presence of functional groups that have potential for heavy metal binding. The highest efficiency of Cu(II) removal was observed for poplar wooden sawdust at static (86 %) and dynamic (88 %) adsorption experiments. Data obtained by neutron activation analysis revealed that ion exchange is also a mechanism of metal removal by the selected wooden sawdust.

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Heavy metal-binding proteins from metal-stimulated bacteria as a novel adsorbent for metal removal technology

Water Science & Technology ◽

10.2166/wst.2006.200 ◽

2006 ◽

Vol 53 (6) ◽

pp. 221-226 ◽

Cited By ~ 1

Author(s):

D. Sano ◽

K. Myojo ◽

T. Omura

Keyword(s):

Heavy Metals ◽

Heavy Metal ◽

Activated Sludge ◽

Metal Binding ◽

Binding Proteins ◽

Metal Removal ◽

Heavy Metal Removal ◽

Copper Ion ◽

Amino Acid Sequences ◽

Heavy Metal Binding

Water pollution with toxic heavy metals is of growing concern because heavy metals could bring about serious problems for not only ecosystems in the water environment but also human health. Some metal removal technologies have been in practical use, but much energy and troublesome treatments for chemical wastes are required to operate these conventional technologies. In this study, heavy metal-binding proteins (HMBPs) were obtained from metal-stimulated activated sludge culture with affinity chromatography using copper ion as a ligand. Two-dimensional electrophoresis revealed that a number of proteins in activated sludge culture were recovered as HMBPs for copper ion. N-termini of five HMBPs were determined, and two of them were found to be newly discovered proteins for which no amino acid sequences in protein databases were retrieved at more than 80% identities. Metal-coordinating amino acids occupied 38% of residues in one of the N-terminal sequences of the newly discovered HMBPs. Since these HMBPs were expected to be stable under conditions of water and wastewater treatments, it would be possible to utilize HMBPs as novel adsorbents for heavy metal removal if mass volume of HMBPs can be obtained with protein cloning techniques.

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Novel hybrid biofilm system using synthetically engineered curli fibres

University of Ottawa Science Undergraduate Research Journal ◽

10.18192/osurj.v1i1.3708 ◽

2018 ◽

Vol 1 ◽

pp. 56

Author(s):

Harshini Ramesh ◽

Keerthana Pasumarthi ◽

Maggie Hou ◽

Jennifer Lee

Keyword(s):

Heavy Metal ◽

Metal Binding ◽

Amyloid Fibrils ◽

Heavy Metal Contamination ◽

Metal Removal ◽

Heavy Metal Removal ◽

E Coli ◽

Metal Binding Sites ◽

The Stability ◽

Freshwater Aquifers

Hydraulic fracturing, a popular mining technique, generates heavy metal contamination in nearby freshwater aquifers. This poses a threat to both the surrounding ecosystems an human health if exposed. Existing methods of heavy metal removal can produce additional hazardous byproducts. This proposal presents the use of a hybrid biofilm filter containing graphene and curli fibres with metal binding sites. Curli fibres are amyloid fibrils found on the extracellular biofilm of Escherichia coli (E coli.). Through the use of plasmid vectors, E. coliwill be engineered to produce secreted curli fibres with metal-binding residues. The stability and cohesive properties of the curli fibres augments the adherence to the graphene scaffolding, thus allowing for generation of a hybrid biofilm. With the filtration design and various experimental controls proposed, this model is ready for empirical proof of concept and subsequent quantitative optimization.

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Ferrate(VI) Synthesis Using Fe(OH)3 from Waste Iron Electrolysis and Its Application for the Removal of Metal Ions and Anions in Water

Indonesian Journal of Chemistry ◽

10.22146/ijc.64824 ◽

2021 ◽

Vol 21 (6) ◽

pp. 1397

Author(s):

Gunawan Gunawan ◽

Abdul Haris ◽

Nor Basid Adiwibawa Prasetya ◽

Eka Pratista ◽

Azis Amrullah

Keyword(s):

Metal Ions ◽

Metal Removal ◽

Heavy Metal Removal ◽

New Approach ◽

Iron And Zinc ◽

Alkaline Conditions ◽

Removal Of Metal ◽

Iron Electrolysis ◽

Removal Of Metal Ions

Ferrate(VI) salt is an effective oxidant and coagulant for water treatment and removal of metal ions. This study demonstrates a new approach to processing metal ions and anions in water by Fe(VI) through Fe(III) obtained from the electrolysis of waste iron transformer. The electrolysis was successfully carried out in the Na2SO4 electrolyte using waste iron and zinc plates as anode and cathode, respectively. Fe(III) electrolysis results through the characterization of FTIR and XRD indicate compliance with Fe(OH)3 standards. Synthesis of ferrate was carried out by adding Fe(III) from electrolysis with NaOCl in alkaline conditions. The formed ferrate solution shows a purple color with a typical maximum wavelength of 505 nm. Furthermore, the ferrate obtained is used to remove metal ions (Fe(III), Cu(II), Zn(II), Mg(II), Pb(II)) and anions (sulfate, nitrate, and carbonate) in water with pH variations. Ferrate treatment filtrate was analyzed using AAS for metal ions, while sulfate, nitrate, and carbonate anions used UV-Vis spectrophotometry, turbidimetry, and titration methods. The results showed that ferrate effectively eliminates metal ions and anions in water with optimum pH 6. The mechanism of heavy metal removal by ferrate(VI) can be explained by ionic bonding and adsorption.

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Fabrication of 2 wt% NiFe2O4/HAp Composite Ceramic for Future Heavy Metal Removal Applications

Applied Mechanics and Materials ◽

10.4028/www.scientific.net/amm.804.291 ◽

2015 ◽

Vol 804 ◽

pp. 291-294

Author(s):

Pattarinee Klumdoung ◽

Salakchit Pukjaroon ◽

Piyapong Pankaew

Keyword(s):

Heavy Metal ◽

Metal Removal ◽

Heavy Metal Removal ◽

Composite Ceramic ◽

Solid State Reaction Method ◽

X Ray Diffraction ◽

Reaction Method ◽

X Ray ◽

Ft Ir ◽

Scanning Electron

In this study, 2 wt% NiFe2O4/HAp composite ceramic was fabricated by the solid state reaction method to form a composite with the future potentiality to remove heavy metals. HAp powders were synthesized by precipitation using Ca (NO3)2 as Ca source, (NH4)2HPO4 as the P source and ammonia as a pH adjuster. NiFe2O4 powders were prepared by mixing and milling NiO and Fe2O3 powders (using stoichiometry ratio) in ethanol and sequent dehydration and then calcination. 2 wt% of NiFe2O4 powders were milled with 98 wt% of HAp powders for 10 minutes before uniaxial pressing and sintering at 1200 °C for 3 hours to form 2 wt% NiFe2O4/HAp composite ceramic. The prepared ceramic was characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and scanning electron microscope (SEM). XRD result shown that 2 wt% NiFe2O4/HAp composite ceramic with only HAp and NiFe2O4 phases obtained. FT-IR results revealed vibration bands of standard HAp and indicated the interaction between ZnFe2O4 and HAp. For the SEM result, the morphology of the prepared ceramic revealed nanoand micro sized grains. These results could lead us to the development of a method for a NiFe2O4/HAp composite ceramic optimized for specific heavy metal removal applications.

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Heavy metal binding by mycorrhizal fungi

Physiologia Plantarum ◽

10.1034/j.1399-3054.1994.920224.x ◽

1994 ◽

Vol 92 (2) ◽

pp. 364-368 ◽

Cited By ~ 5

Author(s):

Ulrich Galli ◽

Hannes Schuepp ◽

Christian Brunold

Keyword(s):

Heavy Metal ◽

Metal Binding ◽

Mycorrhizal Fungi ◽

Heavy Metal Binding

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Investigation on Heavy Metal Removal from a Crude Oil Contaminated Soil using Rhamnolipid Biosurfactant as a New Eco-Friendly Method

Tenside Surfactants Detergents ◽

10.3139/113.110710 ◽

2020 ◽

Vol 57 (6) ◽

pp. 515-520

Author(s):

Nayyereh Kholghi ◽

Hossein Amani ◽

Shokoufeh Malekmahmoodi ◽

Alireza Amiri

Keyword(s):

Heavy Metal ◽

Crude Oil ◽

Contaminated Soil ◽

Metal Removal ◽

Heavy Metal Removal ◽

Rhamnolipid Biosurfactant

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Utilization of Polysaccharides and their Derivatives in the Removal of Metal Ions: Role and Recent Advancement

Current Materials Science ◽

10.2174/2666145413666200311123054 ◽

2020 ◽

Vol 13 ◽

Author(s):

Rishabha Malviya ◽

Pramod Sharma ◽

Akanksha Sharma

Keyword(s):

Waste Water ◽

Heavy Metal ◽

Metal Ions ◽

Industrial Waste ◽

Heavy Metal Ions ◽

Environmental Hazards ◽

Industrial Waste Water ◽

Recent Advancement ◽

Removal Of Metal ◽

Removal Of Metal Ions

: Manuscript discussed about the role of polysaccharides and their derivatives in the removal of metal ions from industrial waste water. Quick modernization and industrialization increases the amount of various heavy metal ions in the environment. They can possess various disease in humans and also causes drastic environmental hazards. In this review the recent advancement for the adsorption of heavy metal ions from waste water by using different methods has been studied. Various natural polymers and their derivatives are act as effective adsorbents for the removal of heavy metal ions from the waste water released from the industries and the treated water released into the environment can decreases the chances of diseases in humans and environmental hazards. From the literature surveys it was concluded that the removal of heavy metal ions from the industrial waste water was important to decrease the environmental pollution and also diseases caused by the heavy metal ions. Graft copolymers were acts as most efficient adsorbent for the removal of heavy metal ions and most of these followed the pseudo first order and pseudo second order model of kinetics.

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