Treatment of heavy metals in wastewaters. What wastewater‐treatment method is most cost‐effective for electroplating and finishing operations? Here are the alternatives

Janson, Carl E.; Kenson, Robert E.; Tucker, Lawrence H.

doi:10.1002/ep.670010315

Cited by 33 publications

(11 citation statements)

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“…It is well‐known that copper accumulation in muscles, human brain, skin, liver, pancreas, and heart causes Wilson’s disease2 and this is why different copper removal methods are currently applied. These methods can be classified as chemical precipitation, ion exchange, evaporation, cementation, electrolysis, and reverse osmosis 3…”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Copper(II) Ion Sorbents Obtained by Calcium Carbonate Mineralization on Functionalized Cross‐Linked Copolymers

Mihai

Bunia

Doroftei

et al. 2015

Chemistry A European J

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A new type of Cu(II) ion sorbents is presented. These are obtained by CaCO3 mineralization from supersaturated solutions on gel-like cross-linked polymeric beads as insoluble templates. A divinylbenzene-ethylacrylate-acrylonitrile cross-linked copolymer functionalized with weakly acidic, basic, or amphoteric functional groups has been used, as well as different initial inorganic concentrations and addition procedures for CaCO3 crystal growth. The morphology of the new composites was investigated by SEM and compared to that of the unmodified beads, and the polymorph content was established by X-ray diffraction. The beads, before and after CaCO3 mineralization, were tested as sorbents for Cu(II) ions. The newly formed patterns on the bead surface after Cu(II) sorption were observed by SEM, and the elemental distribution on the composites and the chemical structure of crystals after interaction with Cu(II) were investigated by EDAX elemental mapping and by FTIR-ATR spectroscopy, respectively. The sorption capacity increased significantly after CaCO3 crystals growth on the weak anionic bead surface (up to 1041.5 mg Cu(II) /g sample) compared to that of unmodified beads (491.5 mg Cu(II) /g sample).

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Section: Introductionmentioning

confidence: 99%

Highly Efficient Copper(II) Ion Sorbents Obtained by Calcium Carbonate Mineralization on Functionalized Cross‐Linked Copolymers

Mihai

Bunia

Doroftei

et al. 2015

Chemistry A European J

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“…Removing heavy metal ions from water in water treatment has attracted much interest on environment and health. Conventional methods that have been employed to remove heavy metal ions from waster solution usually include chemical precipitation, ion exchange, evaporation, membrane separation, and cementation electrolysis, etc 1–4. However, these treatment methods sometimes do not provide satisfactory removal rates to meet the pollution control limits or are usually expensive 5, 6…”

Section: Introductionmentioning

confidence: 99%

Adsorption of heavy metal ions from aqueous solution onto chitosan entrapped CM‐cellulose hydrogels synthesized by irradiation

Zhao

Mitomo

2008

J of Applied Polymer Sci

126

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The application of novel environmentconscious hydrogels as an adsorbent for heavy metal ions adsorption from aqueous solutions was examined. Chitosan was blended with highly concentrated carboxymethylated cellulose (CM-cellulose) solution to form CM-cellulose/chitosan physical hydrogels, which were crosslinked by additionless irradiation technique. The adsorptive properties of the blend hydrogels against some divalent heavy metal ions were investigated by batch adsorption method. It was found that the addition of chitosan increased the crosslinking degree and the adsorption capacity of the blend hydrogels. As a typical example, experimental data of Cu(II) ion were exploited for kinetic and isothermal evaluations. Copper adsorption process was found to be initially transportcontrolled, and its adsorption isotherm can be fitted well into the Langmuir equation. Cu(II) adsorption mechanism can be viewed as the complexation of the Cu(II) with carboxyl groups and amino groups on the CM-cellulose/chitosan gel during the adsorption. From these preliminary evaluations, it is possible to conclude that the CM-cellulose/chitosan blend hydrogels have great potential for applications in water treatment for the removal of heavy metal ions.

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“…Mechanical remedial processes such as ion exchange, reverse osmosis, microfiltration, precipitation, or flocculation are widely used to remove heavy metals from aqueous streams. 48 These methods, however, may be ineffective for large water volumes and low metal ion concentrations. 12 In stream waters, U is usually complexed with a ligand, such as carbonate, hydroxide, sulfate, phosphate, fluoride and possibly silicate.…”

Section: Discussionmentioning

confidence: 99%

Bio-monitoring for uranium using stream-side terrestrial plants and macrophytes

et al. 2012

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This study evaluated the abilities of various plant species to act as bio-monitors for environmental uranium (U) contamination. Vegetation and soil samples were collected from a U processing facility*.The water-way fed from facility storm and processing effluents was the focal sample site as it represented a primary U transport mechanism. Soils and sediments from areas exposed to contamination possessed U concentrations that averaged 630 mg U kg Strontium is chemically and physically similar to calcium (Ca) and magnesium (Mg), which were also positively-correlated with U. The correlation with U and these plant nutrient minerals, including iron (Fe), suggests that active uptake mechanisms may influence plant U accumulation.

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Treatment of heavy metals in wastewaters. What wastewater‐treatment method is most cost‐effective for electroplating and finishing operations? Here are the alternatives

Cited by 33 publications

References 0 publications

Highly Efficient Copper(II) Ion Sorbents Obtained by Calcium Carbonate Mineralization on Functionalized Cross‐Linked Copolymers

Highly Efficient Copper(II) Ion Sorbents Obtained by Calcium Carbonate Mineralization on Functionalized Cross‐Linked Copolymers

Adsorption of heavy metal ions from aqueous solution onto chitosan entrapped CM‐cellulose hydrogels synthesized by irradiation

Bio-monitoring for uranium using stream-side terrestrial plants and macrophytes

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