Chemical properties and biotoxicity of several chromium picolinate derivatives

Liu, Bin; Liu, Yanfei; Chai, Jie; Hu, Xiangquan; Wu, Duoming; Yang, Binsheng

doi:10.1016/j.jinorgbio.2016.09.006

Cited by 17 publications

(2 citation statements)

References 33 publications

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“…Among them, Cr is of high concern because of its persistent toxicity, accumulation in the food chain, and eventual threats to human health. Generally, Cr(VI) is 100–1000 times more toxic than Cr(III) because Cr(VI) can easily enter the cell interior and induce the production of hydroxyl radicals, causing cancer or DNA damage and disrupting cell functions. − To address this problem, some remediation strategies have been developed and applied to clean Cr-contaminated soils. Chemical and physical approaches to remediate Cr-contaminated soils include curing, , stabilization, soil drenching, and electroremediation .…”

Section: Introductionmentioning

confidence: 99%

Facilitating New Chromium Reducing Microbes to Enhance Hexavalent Chromium Reduction by In Situ Sonoporation-Mediated Gene Transfer in Soils

Zhao,

Zhang,

Liang

et al. 2023

Environ. Sci. Technol.

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Chromium (Cr) is a heavy metal with a high toxicity and pathogenicity. Microbial reduction is an effective strategy to remove Cr(VI) at contaminated sites but suffers from the low populations and activities of Cr-reducing microorganisms in soils. This study proposed an in situ sonoporation-mediated gene transfer approach, which improved soil Cr(VI) reduction performance by delivering exogenous Cr-transporter chrA genes and Cr-reducing yieF genes into soil microorganisms with the aid of ultrasound. Besides the increasing populations of Cr-resistant bacteria and elevated copy numbers of chrA and yieF genes after sonoporation-mediated gene transfer, three new Cr-reducing strains were isolated, among which Comamonas aquatica was confirmed to obtain Cr-resistant capability. In addition, sonoporation-mediated gene transfer was the main driving force significantly shaping soil microbial communities owing to the predominance of Cr-resistant microbes. This study pioneered and evidenced that in situ soil sonoporation-mediated gene transfer could effectively deliver functional genes into soil indigenous microbes to facilitate microbial functions for enhanced bioremediation, e.g., Cr-reduction in this study, showing its feasibility as a chemically green and sustainable remediation strategy for heavy metal contaminated sites.

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Section: Introductionmentioning

confidence: 99%

Facilitating New Chromium Reducing Microbes to Enhance Hexavalent Chromium Reduction by In Situ Sonoporation-Mediated Gene Transfer in Soils

Zhao,

Zhang,

Liang

et al. 2023

Environ. Sci. Technol.

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“…Picolinic acid (C6H5NO2) is a substance found widely in nature, particularly in plants and humans, participating in key regulatory processes and provides assimilation of elements [1]. Complexes using picolinates have therapeutic uses in both humans and animals, for example chromium picolinate may be used as a dietary supplement, with the complex also being reported to reduce morphine dependence in rats [2][3]. Zinc picolinate was also studied as a dietary supplement, aiming to reduce the oxidative stress found in species of rainbow trout [4].…”

Section: Introductionmentioning

confidence: 99%

Novel solid-state compounds of heavy rare-earth (III) picolinates. A pyrolytic study using: TG-DSC-IR, HSM-MS and GC-MS

Nascimento

Ashton

Parkes

et al. 2019

Journal of Analytical and Applied Pyrolysis

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Heavy trivalent lanthanides and yttrium picolinates were synthesized by complexation of basic rare-earth metal carbonates with an aqueous solution of picolinic acid. The novel compounds were obtained with the general formula Ln(L)3•nH2O, where L is picolinate and n= 1.5 H2O (Dy, Ho, Yb, Lu and Y), 2 H2O (Tb and Tm) and 2.5 H2O (Er). The stoichiometry of the complexes was calculated through mass losses found using thermogravimetry (TG), complexometry and elemental analysis (EA). The thermal behavior in oxidative and pyrolytic atmospheres of the compounds was analyzed by simultaneous thermogravimetry -differential scanning calorimetry (TG-DSC). The gaseous products of the pyrolysis were determined throughout by monitoring the evolved species using TG-DSC, Fourier transform infrared spectroscopy (TG-DSC-FTIR), hot-stage microscopy mass spectrometry (HSM-MS), and gas chromatography-mass spectrometry (GC-MS). The obtained results validated mass loss assignments made using the TG curves. However, gaseous product analysis indicates the degradation processes are more complex than the thermoanalytical techniques suggest alone. This study used a GC-MS technique to identify the condensed gaseous products obtained during the second step of the thermal degradation of the picolinate complexes. The analysis of the symmetric and asymmetric stretching frequencies of the carboxylate group in the FTIR spectra showed a monodentate bonding mode. The compounds were obtained in the amorphous state, as indicated by the powder X-ray diffractometry (PXRD) data.

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