Hydroxide precipitation of complexed metals

Tünay, Olcay; Kabdasli, N. Isik

doi:10.1016/0043-1354(94)90022-1

Cited by 95 publications

(36 citation statements)

References 1 publication

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“…The UPE process enhanced by adding H 2 diates such as Cu-EDDA, Cu-NTA, Cu-IDA, EDDA, NTA and IDA and by-products like acetic acid, formic acid, oxalic acid and nitrate were identified in the H 2 O 2 -UPE process. By contrast, oxalic acid, dichloroacetic acid and trichloroacetic acid were detected in the EC-UPE process.…”

Section: Discussionmentioning

confidence: 99%

“…In the effluent from above fields, copper ions were usually combined with chelating agents, such as ethylenediaminetetraacetic acid (EDTA), nitriletriacetic acid (NTA) and citrate. The application of conventional precipitation and biological process for the removal of the copper complexes was limited [2,3]. Recently, advanced oxidation processes (AOPs) including Fenton oxidation process and UV/H 2 O 2 process have been investigated in treating metal-binding EDTA [4,5].…”

Section: Introductionmentioning

confidence: 99%

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Photo-assisted electrolytic decomplexation of Cu-EDTA and Cu recovery enhanced by H 2 O 2 and electro-generated active chlorine

Zeng

Tian

Liu

et al. 2016

Chemical Engineering Journal

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Photo-assisted electrolytic decomplexation of Cu-EDTA and Cu recovery enhanced by H 2 O 2 and electro-generated active chlorine

Zeng

Tian

Liu

et al. 2016

Chemical Engineering Journal

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“…Several treatment processes have been suggested for the removal of nickel ions from aqueous waste streams: adsorption [2,3], biosorption [4,5], ion exchange [6], chemical precipitation [7,8] and electrochemical methods: electrowinning [9.10], electrodialysis [11], electrodeionization [12,13], membrane-less electrostatic shielding based electrodialysis/electrodeionization [14][15][16] and electrocoagulation.…”

Section: Introductionmentioning

confidence: 99%

Nickel removal from waste water by electrocoagulation with aluminum electrodes

Dermentzis¹,

Valsamidou²,

Lazaridou³

et al. 2011

JESTR

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In this study, the performance of electrocoagulation with aluminium electrodes for removing nickel from synthetic aqueous solutions and actual electroplating wastewater was investigated. Parameters affecting the electrocoagulation process, such as initial pH, current density, initial metal ion concentration and contact time were investigated. The removal efficiency is very high in the pH range 4-10. Increased current density accelerated the electrocoagulation process, however, on cost of increased energy consumption. Initial Ni 2+ concentrations of 100-300 mg/lit were quantitatively reduced under the admissible limits in only 10-20 minutes of electrolysis time respectively at the current density of 30 mA/cm 2 . The process has proved to be efficient in removing Ni 2+ ions also from industrial electroplating effluents, where an initial Ni 2+ concentration of 215 mg/lit fell under the legal limits in 20 minutes.

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“…Various techniques have been applied to eliminate heavy metals, such as chemical precipitation, [1,2] ion exchange, [3,4] adsorption, [5] electrochemical treatment, [6] and membrane filtration. [7] Among these methods, adsorption is considered to be an effective and widely used strategy with numerous advantages, such as generality, high efficiency, relatively low cost, and possible regeneration of the adsorbent.…”

mentioning

confidence: 99%

Graphdiyne Filter for Decontaminating Lead‐Ion‐Polluted Water

Liu

Zhou

Gao

et al. 2017

Adv Elect Materials

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into the environment is essential. Various techniques have been applied to eliminate heavy metals, such as chemical precipitation, [1,2] ion exchange, [3,4] adsorption, [5] electrochemical treatment, [6] and membrane filtration. [7] Among these methods, adsorption is considered to be an effective and widely used strategy with numerous advantages, such as generality, high efficiency, relatively low cost, and possible regeneration of the adsorbent. Adsorption is realized through van der Waals forces, electrostatic attraction, ion exchange, or chemical binding between metal ions and adsorbents. Much effort has been made to develop new adsorbents and improve the performance of existing adsorbents. Recently, carbon materials, such as active carbons, [8] graphene, [9] and carbon nanotubes, [10] have been regarded as promising candidates for the adsorption of heavy metal ions due to their high specific surface areas and strong interactions with metal ions. The adsorption capacity of these carbon materials toward metal ions can be significantly increased through oxidation. [11,12] Graphdiyne is a new 2D carbon material that is composed of sp-and sp 2 -hybridized carbon atoms. [13,14] This material has attracted great attention due to its impressive properties, such as high carrier mobility, [15] high nonlinear optical susceptibility, [16] low thermal conductivity, [17] and uniformly distributed pores, which are defined by the atomic structure of graphdiyne. Graphdiyne has been proposed as a promising material for application in electronic devices, energy storage, [18] gas separation, [19,20] metal-free catalysis, [21] water purification, [22,23] etc. A number of studies have examined the synthesis of this material, and graphdiyne with different morphologies [24][25][26][27] and oligomeric subunits of graphdiyne [13,28] have been achieved. Various applications of these materials have been demonstrated by taking advantage of the electrical conductivity, holetransport properties, and morphological characteristics of graphdiyne. [29][30][31][32] The acetylenic links in graphdiyne strongly interact with metal ions (Figure 1a), which can be utilized to adsorb metal ions from water. This material shows a different manner of adsorption than that of carbon adsorbents examined in previous work, in which oxygen-containing groups are generally regarded as the adsorption sites. Herein, we present the almost complete removal of lead ions from water by using a The decontamination of water polluted with heavy metal ions is of worldwide concern. Among various treatment approaches to remove metal ions from water, adsorption is regarded as an efficient method, and a variety of materials have been applied as adsorbents for the removal of metal ions from polluted water. Recently, carbon nanomaterials have been examined as alternative adsorbents due to their high specific surface areas, high removal efficiency, and strong interactions with metal ions. Graphdiyne, a new kind of carbon allotrope composed of sp-and sp 2 -hybridized carbon atoms...

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Hydroxide precipitation of complexed metals

Cited by 95 publications

References 1 publication

Photo-assisted electrolytic decomplexation of Cu-EDTA and Cu recovery enhanced by H 2 O 2 and electro-generated active chlorine

Photo-assisted electrolytic decomplexation of Cu-EDTA and Cu recovery enhanced by H 2 O 2 and electro-generated active chlorine

Nickel removal from waste water by electrocoagulation with aluminum electrodes

Graphdiyne Filter for Decontaminating Lead‐Ion‐Polluted Water

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