Selective precipitation of Cu from Zn in a pS controlled continuously stirred tank reactor

Sampaio, R.M.M.; Timmers, R.A.; Xu, Yun; Keesman, Karel J.; Lens, Piet N.L.

doi:10.1016/j.jhazmat.2008.09.117

Cited by 87 publications

(53 citation statements)

References 47 publications

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“…However, as shown in Figure 2(a) the particle size distribution of the precipitated CuS ranged from 0.03 to 4 μm, which is smaller than SRB. Previous studies reported that biologically produced CuS easily combines with cells [17] or agglomerate onto each other [1] because of the hydrogen bonds that surface hydroxyls form by hydration in aqueous solutions. Therefore, the produced CuS easily deposited onto SRB resulting in a black layer enveloping SRB cells (Figure 3(b)).…”

Section: Influence Of Sulfide On Srb Heavy Metal Toxicitymentioning

confidence: 99%

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Effects of sulfide on sulfate reducing bacteria in response to Cu(II), Hg(II) and Cr(VI) toxicity

Sheng

Cao

et al. 2011

Chin. Sci. Bull.

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Sulfate reducing bacteria (SRB) is identified as the primary organisms responsible for the treatment of heavy metal wastewater. However, most heavy metals can inhibit the growth of SRB during heavy metal treatment processes. Sulfide is a metabolic product of SRB and it can precipitate or reduce heavy metals. This study focused on the effects of sulfide on SRB resistance to Cu(II), Hg(I) and Cr(VI) toxicity. First, we considered the existence style of various heavy metals with and without sulfide addition by sequential extraction experiments. Second, the particle size distribution was evaluated and the cell structure during the metabolism of a SRB culture, containing different heavy metals, was analyzed by particle size distribution and TEM analyses. Third, the evolution of sulfate under the influence of different concentrations of heavy metals with and without sulfide addition was investigated to evaluate SRB activity. The results indicated that sulfide played an important role in alleviating and even eliminating the toxicity of Cu(II), Hg(II) and Cr(VI). We also discuss the mechanism of sulfide on SRB resistance to Cu(II), Hg(I) and Cr(VI) toxicity. With the development of metallurgy-related industries like metal finishing and electroplating, massive amounts of acid wastewater are generated and released into the environment [1]. These waste streams commonly contain high levels of sulfate and dissolved metals. The discharge of this heavy metal contaminated wastewater into the environment can be devastating to aquatic and terrestrial ecosystems [2]. Conventionally, the most widely used method to treat these effluents is chemical neutralization with hydroxide followed by the precipitation of metals. However, this method has serious limitations due to the production of large amounts of unstable metal hydroxides leading to high disposal and dewatering costs for the produced sludge [3]. The biological treatment of acidic and metal-containing wastewater is an attractive alternative. The main advantage of this process over chemical neutralization is that less sludge is generated *Corresponding author (email: hbcao@home.ipe.ac.cn) and insoluble compounds such as metal oxides or sulfides are produced that are easily separated and recycled [4][5][6]. SRB have been identified as the primary bacteria for use in the biological treatment of heavy metal containing wastewater. While SRB are capable of various metal transformations, metals can also inhibit their growth [7][8][9]. Sulfide which is produced biologically during sulfate reduction by SRB could precipitate [10,11] or reduce [12,13] heavy metal cation. This decreases or even eliminates the toxicity of the heavy metals toward SRB. To our knowledge, few systematic investigations on the effects of sulfide on SRB resistance to heavy metal ion toxicity and of biologically produced precipitates on SRB metabolism have been conducted. We, therefore, studied the toxic metal ions Cu(II), Hg(II) and Cr(VI), which are usually found in waste streams. The mechanism of sulfides in...

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Section: Influence Of Sulfide On Srb Heavy Metal Toxicitymentioning

confidence: 99%

“…With the development of metallurgy-related industries like metal finishing and electroplating, massive amounts of acid wastewater are generated and released into the environment [1]. These waste streams commonly contain high levels of sulfate and dissolved metals.…”

mentioning

confidence: 99%

Effects of sulfide on sulfate reducing bacteria in response to Cu(II), Hg(II) and Cr(VI) toxicity

Sheng

Cao

et al. 2011

Chin. Sci. Bull.

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“…Nowadays, there are various methods for the removal of these heavy metals from aqueous solution, such as deposition [5], ion exchange [6], filtration [7], membrane [8], solvent extraction [9], coagulation [10], and flotation [11]. However, adsorption is the most popular method applied pervasively in environmental chemistry and chemical industries.…”

Section: Introductionmentioning

confidence: 99%

Phosphonate Modified Silica for Adsorption of Co(II), Ni(II), Cu(II), and Zn(II)

Widjonarko¹,

Jumina²,

Kartini³

et al. 2014

Indones. J. Chem.

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A new phosphonate modified silica (PMS) has been investigated for adsorption of Co(II), Ni(II), Cu(II), andZn (II) II)>Co(II)>Ni(II)>Zn(II). Based on the adsorption characteristic, the adsorbent is promising to be applied as a material for solid phase extraction of transition metal ions. Keywords: modified silica; phosphonate; adsorption ABSTRAK Suatu silika termodifikasi fosfonat (STF) baru telah dikaji sebagai adsorben larutan Co(II), Ni(II), Cu(II), dan Zn(II). STF disintesis dengan mengimobilisasi aminoetil dihidrogen fosfat (AEPH

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“…However, it is also accompanied by the treatment of metal hydroxide precipitates. Recently, many researchers have studied several advanced methods such as the biogenic sulfide since most base metals in acidic solution precipitate in contact with sulfide [6][7][8][9][10]. Even though, the most popular method for AMD treatment today is still lime neutralization.…”

Section: Introductionmentioning

confidence: 99%

Selective Precipitation of Copper and Zinc over Iron from Acid Mine Drainage by Neutralization and Sulfidization for Recovery

Wang

Ponou

Matsuo

et al. 2014

Int. J. Soc. Mater. Eng. Resour

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In order to selectively precipitate copper (Cu) and zinc (Zn) over iron (Fe) for recovery from an acid mine drainage (AMD) generated from an abandoned copper mine located in east Japan, the feasibility of a treatment process combining lime neutralization with sodium hydrosulfide (NaHS) sulfidization was investigated. First of all, lime neutralization was applied to the AMD to find the precipitation behaviors of Cu, Zn, and Fe. Next, NaHS sulfidization as well as the integration with lime neutralization were conducted to selectively precipitate Cu, Zn, and Fe from the AMD. The results show that by adding more than 20 mg/L NaHS into the AMD at pH 2.8 without pH adjustment, all of the Cu precipitated whereas Fe and Zn did not. Fe could be selectively precipitated over Zn afterwards by lime neutralization at pH 5; however, the addition of an oxidizing agent such as 0.02 vol.% H 2 O 2 was needed. On the other hand, after Fe was fully precipitated previously by lime neutralization at pH 5, all of the Cu precipitated when 10-15 mg/L NaHS was added whereas Zn did not. After Cu and Fe were precipitated, Zn could be precipitated by lime neutralization at above pH 9.

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Selective precipitation of Cu from Zn in a pS controlled continuously stirred tank reactor

Cited by 87 publications

References 47 publications

Effects of sulfide on sulfate reducing bacteria in response to Cu(II), Hg(II) and Cr(VI) toxicity

Effects of sulfide on sulfate reducing bacteria in response to Cu(II), Hg(II) and Cr(VI) toxicity

Phosphonate Modified Silica for Adsorption of Co(II), Ni(II), Cu(II), and Zn(II)

Selective Precipitation of Copper and Zinc over Iron from Acid Mine Drainage by Neutralization and Sulfidization for Recovery

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