Ecotoxicity of cyanide complexes in industrially contaminated soils

Manar, Rachid; Bonnard, Marc; Rast, C.; Veber, Anne-Marie; Vasseur, Paule

doi:10.1016/j.jhazmat.2011.09.095

Cited by 39 publications

(5 citation statements)

References 32 publications

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“…Potassium ferricyanide (K 3 [Fe III (CN) 6 ]) is known to be one of the most common contaminations in polluted water, air, and soil. 21 Considering the acute toxicity, mutagenicity, carcinogenicity, and easy accumulation in the human body, aquatic animals, and various living organisms, the reductive decontamination of K 3 [Fe III (CN) 6 ] into nontoxic K 4 [Fe II (CN) 6 ] 22 is generally achieved by using noble metals as catalysts, such as Au 23 or Ru. 24 However, the high cost and low abundance of noble metals limits their widespread application rendering polyoxometalates with their promising redox properties and reversible electron gain-and-loss capacities to be interesting cost-effective electron-transfer catalysts ( Scheme S1 ).…”

Section: Resultsmentioning

confidence: 99%

Defect {(W^VIO₇)W^VI₄} and Full {(W^VIO₇)W^VI₅} Pentagonal Units as Synthons for the Generation of Nanosized Main Group V Heteropolyoxotungstates

et al. 2021

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We report on the synthesis and characterization of three new nanosized main group V heteropolyoxotungstates K x Na y [H 2 (XW VI 9 O 33 )(W VI 5 O 12 )(X 2 W VI 29 O 103 )]· n H 2 O {X 3 W 43 } ( x = 11, y = 16, and n = 115.5 for X = Sb III ; x = 20, y = 7, and n = 68 for X = Bi III ) and K 8 Na 15 [H 16 (Co II (H 2 O) 2 ) 0.9 (Co II (H 2 O) 3 ) 2 (W VI 3.1 O 14 )(Sb III W VI 9 O 33 )(Sb III 2 W VI 30 O 106 )(H 2 O)]·53H 2 O {Co 3 Sb 3 W 42 } . On the basis of the key parameters for the one-pot synthesis strategy of {Bi 3 W 43 } , a rational step-by-step approach was developed using the known Krebs-type polyoxotungstate (POT) K 12 [Sb V 2 W VI 22 O 74 (OH) 2 ]·27H 2 O {Sb 2 W 22 } as a nonlacunary precursor leading to the synthesis and characterization of {Sb 3 W 43 } and {Co 3 Sb 3 W 42 } . Solid-state characterization of the three new representatives {Bi 3 W 43 } , {Sb 3 W 43 } , and {Co 3 Sb 3 W 42 } by single-crystal and powder X-ray diffraction (XRD), IR spectroscopy, thermogravimetric analysis (...

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Section: Resultsmentioning

confidence: 99%

Defect {(W^VIO₇)W^VI₄} and Full {(W^VIO₇)W^VI₅} Pentagonal Units as Synthons for the Generation of Nanosized Main Group V Heteropolyoxotungstates

et al. 2021

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“…Although not associated with cyanide assimilation, this alternative oxidase does contribute to plant's abilities to resist cyanide toxicity ). The EC 50 -7 days values inhibiting the reproduction of C. dubia by 50 % were 98, 194 and 216 lg CN/L for KCN, K 3 Fe(CN) 6 and K 4 Fe(CN) 6 , respectively (Manar et al 2011), where EC 50 -3d was determined to be 57 lg CN/L for N. closterium inhibiting 50 % of the population growth (Pablo et al 1997). It is evident that aquatic vascular plants are more resistant to cyanide than algae (Eisler and Wiemeyer 2004).…”

Section: Phytotoxicity Of Cyanogenic Compoundsmentioning

confidence: 94%

Uptake, assimilation and toxicity of cyanogenic compounds in plants: facts and fiction

2014

Int. J. Environ. Sci. Technol.

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Cyanide is a simple nitrogenous compound that arises from both anthropogenic and natural sources. Plants vary considerably in their physiological and biochemical responses to different species of exogenous cyanides from reduced growth to inhibition on enzymatic activities. Also, great differences in uptake, assimilation and toxicity between free cyanide and iron cyanide have been observed. Unlike botanical uptake of free cyanide chiefly achieved by simple diffusion, iron cyanides have long been considered membrane impermeable and a protein-mediated uptake mode has been proposed. Biological fate of cyanides in plant materials is highly dependent on speciation of cyanides present. Natural development of degradation of free cyanide in plants is very obvious, where the b-cyanoalanine pathway has been widely distributed in higher plants and the production of asparagine and aspartate associated with cyanide assimilation is suggestive. Because phytodissociation of iron cyanides into free cyanide in plant materials is not a mandatory process involved in phytoassimilation, plants probably metabolized them through an undiscovered degradation pathway rather than the b-cyanoalanine pathway. Available information shows phytoassimilation of endogenous cyanide into nitrogen metabolism; however, additional efforts to fully elucidate presence of essential enzymes involved and their proteomic or DNA expression quantitatively are needed to prove and clarify phyto-benefits of assimilation of exogenous cyanide in plant nutrition.

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“…MCN has been fully recognized to be a highly toxic substance (Manar et al, 2011;Choi et al, 2012;Lee et al, 2015), thus, it urgently requires effective method to mitigate MCN content in biochar. As above discussed, the inhibition of MCN can be achieved though the blocking of MOCN formation, because MOCN is sole precursor of MCN.…”

Section: Inhibition Mechanism Of Mcn During Biomass Pyrolysismentioning

confidence: 99%

Reveal a hidden highly toxic substance in biochar to support its effective elimination strategy

Luo

Lin

Liu

et al. 2020

Journal of Hazardous Materials

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With the aim to develop optimized biochar with minimal contaminants, it is important significance to broaden the understanding of biochar. Here, we disclose for the first time, a highly toxic substance (metal cyanide, MCN, such as KCN or NaCN) in biochar. The cyanide ion (CN -) content in biochar can be up to 85870 mg/kg, which is determined by the inherent metal content and type in the biomass with K and Na increasing and Ca, Mg and Fe decreasing its formation. Density functional theory (DFT) analysis shows that unstable alkali oxygen-containing metal salts such as K2CO3 can induce an N rearrangement reaction to produce for example, KOCN. The strong reducing character of the carbon matrix further converts KOCN to KCN, thus resulting biochar with high risk.However, the stable Mg, Ca and Fe salts in biomass cannot induce an N rearrangement reaction due to their high binding energies. We therefore propose that high valent metal chloride salts such as FeCl3 and MgCl2 could be used to inhibit the production of cyanide via metal interactive reaction. These findings open a new point of view on the potential risk of biochar and provide a mitigation solution for biochar's sustainable application.

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Ecotoxicity of cyanide complexes in industrially contaminated soils

Cited by 39 publications

References 32 publications

Defect {(W^VIO₇)W^VI₄} and Full {(W^VIO₇)W^VI₅} Pentagonal Units as Synthons for the Generation of Nanosized Main Group V Heteropolyoxotungstates

Defect {(W^VIO₇)W^VI₄} and Full {(W^VIO₇)W^VI₅} Pentagonal Units as Synthons for the Generation of Nanosized Main Group V Heteropolyoxotungstates

Uptake, assimilation and toxicity of cyanogenic compounds in plants: facts and fiction

Reveal a hidden highly toxic substance in biochar to support its effective elimination strategy

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Ecotoxicity of cyanide complexes in industrially contaminated soils

Cited by 39 publications

References 32 publications

Defect {(WVIO7)WVI4} and Full {(WVIO7)WVI5} Pentagonal Units as Synthons for the Generation of Nanosized Main Group V Heteropolyoxotungstates

Defect {(WVIO7)WVI4} and Full {(WVIO7)WVI5} Pentagonal Units as Synthons for the Generation of Nanosized Main Group V Heteropolyoxotungstates

Uptake, assimilation and toxicity of cyanogenic compounds in plants: facts and fiction

Reveal a hidden highly toxic substance in biochar to support its effective elimination strategy

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Product

Resources

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Defect {(W^VIO₇)W^VI₄} and Full {(W^VIO₇)W^VI₅} Pentagonal Units as Synthons for the Generation of Nanosized Main Group V Heteropolyoxotungstates

Defect {(W^VIO₇)W^VI₄} and Full {(W^VIO₇)W^VI₅} Pentagonal Units as Synthons for the Generation of Nanosized Main Group V Heteropolyoxotungstates