Vibrational spectra of lead(II) oxalate

Mancilla, Nancy; D’Antonio, María C.; González‐Baró, Ana C.; Baran, Enrique J.

doi:10.1002/jrs.2370

Cited by 29 publications

(23 citation statements)

References 26 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…6a). The Raman band at 486 cm −1 and 498 cm −1 are the ν 3 , δ s (O-C-O) mode in the lead oxalate, the 854 cm −1 and 891 cm −1 band are assigned to the ν 2 , ν(C-C), 1436 cm −1 and 1478 cm −1 are assigned to the ν 1 , ν s (C-O), and 1588 cm −1 is assigned to the ν 10 , ν s (C-O) 29 . Further, the peaks in the XRD pattern, 18.65°, 19.57°, 21.27°, 23.71°, 26.29°, 32.51°, 39.05°, and 51.26°, correspond to the diffraction crystal planes of lead oxalate from diffraction software ( Fig.…”

Section: Resultsmentioning

confidence: 99%

Removal mechanism of Pb(II) by Penicillium polonicum: immobilization, adsorption, and bioaccumulation

Hao

et al. 2020

Sci Rep

View full text Add to dashboard Cite

currently, lead (pb) has become a severe environmental pollutant and fungi hold a promising potential for the remediation of pb-containing wastewater. the present study showed that Penicillium polonicum was able to tolerate 4 mmol/L Pb(II), and remove 90.3% of them in 12 days through three mechanisms: extracellular immobilization, cell wall adsorption, and intracellular bioaccumulation. in this paper. the three mechanisms were studied by Raman, X-ray diffraction analysis (XRD), scanning electron microscopy (SeM), fourier transform infrared spectroscopy (ftiR) and transmission electron microscopy (teM). the results indicated that pb(ii) was immobilized as lead oxalate outside the fungal cell, bound with phosphate, nitro, halide, hydroxyl, amino, and carboxyl groups on the cell wall, precipitated as pyromorphite [pb 5 (po 4) 3 Cl] on the cell wall, and reduced to Pb(0) inside the cell. These combined results provide a basis for additionally understanding the mechanisms of pb(ii) removal by P. polonicum and developing remediation strategies using this fungus for lead-polluted water. The discharge of Pb-containing wastes from increased industrialization and human activities have resulted in negative impacts on the environment 1. Lead (Pb) upsets ecosystems, and endangers human health through bioaccumulation within the food chain 2. Consequently, various physicochemical treatment methods such as precipitation, coagulation, ionic exchange, inverse osmosis and adsorption have been used to remediate environmental Pb-containing contamination 3. However, such conventional methods involve either high operational costs or ineffective removal of Pb(II) at ppm levels, and may also cause secondary pollution during the repair process 4,5. In contrast, bioremediation has unique advantages, including adequate availability of materials, low cost, and no secondary pollution. Therefore, bioremediation continues to attract significant attention for the development of remedial alternatives 6-8. Over the last decade, filamentous fungi have emerged as versatile bioremediation agents owing to their adaptability to extreme conditions of pH, temperature, and nutrient availability as well as tolerance to high metal concentrations 9,10. A variety of fungal species with the ability to remove Pb(II) from aqueous solutions. For example, the Pb(II) uptake capacity for Saccharomyces cerevisiae 11 , Mucor rouxii 1 , Aspergillus niger 12 and Penicillium polonicum 13 is reported as 85.6, 74.6, 34.4 and 75.2 mg/g, respectively, indicating that the filamentous fungi have promising potential to be used for the Pb(II) polluted sewage treatment. Under stress from high concentrations of Pb(II), filamentous fungi possess various mechanisms for the removal of Pb(II) from aqueous systems 14 , One such mechanism is extracellular immobilization. In the presence of Pb(II) stress, various metabolic processes are stimulated and Pb(II) is chelated by excreted metabolites. Low molecular weight organic acids (LMWOAs) such as oxalic acid may play a significant role in...

show abstract

Section: Resultsmentioning

confidence: 99%

Removal mechanism of Pb(II) by Penicillium polonicum: immobilization, adsorption, and bioaccumulation

Hao

et al. 2020

Sci Rep

View full text Add to dashboard Cite

show abstract

“…Upon coordination of the oxalate as a mono-oxalate species, the symmetry species is reduced to C 2v or D 2h . Assignments of Raman spectra of oxalic acid and oxalates have been reported in previous studies (Chang and Huang, 1997;D'Antonio et al, 2010;Ebisuzaki and Angel, 1981;Frost, 2004;Mancilla et al, 2009;Moha cekGro sev et al, 2009). According to these literatures, we made the assignments as follows, which are also summarized in Table 1.…”

Section: Assignments Of Raman Bandsmentioning

confidence: 99%

“…The gray dashed line represents the Raman spectrum of iron (II) oxalate dihydrate. (Ebisuzaki and Angel, 1981;Frost, 2004;Frost and Weier, 2003;Mancilla et al, 2009;Moha cek-Gro sev et al, 2009). Previous studies always assigned the Raman shift bands in the range of 1610e1650 cm À1 to the stretching mode of C]O (Frost, 2004;Mancilla et al, 2009 particles.…”

mentioning

confidence: 99%

“…(Ebisuzaki and Angel, 1981;Frost, 2004;Frost and Weier, 2003;Mancilla et al, 2009;Moha cek-Gro sev et al, 2009). Previous studies always assigned the Raman shift bands in the range of 1610e1650 cm À1 to the stretching mode of C]O (Frost, 2004;Mancilla et al, 2009 particles. It should also be noted that Ebisuzaki and Angel (1981) assigned the band at 1628 cm À1 in the spectrum of (COOH) 2 $2H 2 O, which shifted to 1220 cm À1 for (COOD) 2 $2D 2 O particles.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Hygroscopic properties of oxalic acid and atmospherically relevant oxalates

Liu

2013

Atmospheric Environment

View full text Add to dashboard Cite

show abstract

“…In addition, the spectra displayed peaks at~1,440,~1,480, and~1,590 cm −1 , which were assigned to various C─O vibrations of Pb oxalate mineral. [32] Therefore, the characteristic peaks of spot analysis in Figure 3 confirmed that the secondary mineral is Pb oxalate. It should be pointed out that the small (Figure 3a) and large (Figure 3b) Pb oxalate particles demonstrated distinct order (also confirmed after normalization) of the intensities for Raman peaks at~1,440,~1,480, and 1,590 cm −1 , suggesting the variable orientation of the secondary Pb mineral (probably due to different growth stage).…”

Section: Identification Of Pb Secondary Minerals Using Risementioning

confidence: 77%

Tracking the fungus‐assisted biocorrosion of lead metal by Raman imaging and scanning electron microscopy technique

Shao

Jiao

et al. 2020

J Raman Spectroscopy

View full text Add to dashboard Cite

Fungi play a significant role in biological corrosion of metal materials. We studied the biocorrosion of lead foils under incubation of Aspergillus niger (A. niger). Multiple techniques, for example, scanning electron microscopy (SEM), diffuse reflectance infrared Fourier transform spectroscopy (DRIFT), and Raman imaging and scanning electron microscopy (RISE), were applied in this study. SEM confirmed the normal growth of the fungus on Pb foil surface, either above or under the solid medium surface. In addition, SEM‐energy dispersive spectrometer confirmed the formation of the secondary Pb mineral particles after incubation, which had variable morphologies. DRIFT was able to show changes of compounds formed on the surface of Pb foils. However, it cannot exactly identify the mineral phase. RISE technology offered both morphological and spectral information of the formed Pb mineral. Three dominant Raman peaks at ~1,440, ~1,480, and ~1,590 cm−1 indicated that the secondary mineral was lead oxalate. Raman mapping further demonstrated the distribution of Pb oxalate architecture. This study first applied RISE to investigate the biocorrosion of metals by fungi.

show abstract

Vibrational spectra of lead(II) oxalate

Abstract: The infrared and Raman spectra of anhydrous lead oxalate (PbC 2 O 4 ) were recorded and discussed on the basis of its structural peculiarities. Some comparisons with other previously investigated metallic oxalates were made.

Cited by 29 publications

References 26 publications

Removal mechanism of Pb(II) by Penicillium polonicum: immobilization, adsorption, and bioaccumulation

Removal mechanism of Pb(II) by Penicillium polonicum: immobilization, adsorption, and bioaccumulation

Hygroscopic properties of oxalic acid and atmospherically relevant oxalates

Tracking the fungus‐assisted biocorrosion of lead metal by Raman imaging and scanning electron microscopy technique

Contact Info

Product

Resources

About