Biogeochemical behaviour and toxicology of chromium in the soil-water-human nexus: A review

Mortada, Wael I.; El-Naggar, Ali; Mosa, Ahmed; Palansooriya, Kumuduni Niroshika; Yousaf, Balal; Tang, Ronggui; Wang, Shengsen; Cai, Yanjiang; Chang, Scott X.

doi:10.1016/j.chemosphere.2023.138804

Cited by 44 publications

(4 citation statements)

References 157 publications

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“…[16] Several chromate reductases from bacterial sources have been identified, including ChrR, NemA, YieF, and LpDH, located in the cytoplasm or attached to the bacterial cell membrane. [17] A few microbial enzyme homologs with Cr-reducing activity are NemA, YieF, and NfsA from Escherichia coli; Frm2 and Ycp4 from Wickerhamomyces anomalus M10; NfrA from Bacillus subtilis; and ChrR from B. methylotrophicus. [18] Some chromate reductases, also known as FMN reductases, such as the B. subtilis nfrA2 enzyme, can also reduce chromate.…”

Section: Introductionmentioning

confidence: 99%

In silico analysis of chromium‐reducing OXR genes derived from tannery effluent‐contaminated soil metagenome

Singh,

Patel,

Varma

et al. 2024

CLEAN Soil Air Water

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Tannery effluent waste comprises various potentially toxic metals, including chromium (Cr) with varying acute or chronic toxicity. Cr(VI) is known to be a category‐A carcinogen. Reduction of toxic Cr(VI) to Cr(III), which has lesser bioavailability, is one of the mechanisms used by many microbes to withstand Cr(VI) toxicity in the contaminated effluents. Oxidoreductase (OXRs) reduces toxic Cr(VI) to Cr(III); hence a thorough understanding of the OXRs is important for developing a suitable strategy to minimize Cr(VI) toxicity. Therefore, the OXR‐encoding genes were sequenced using metagenomic DNA shotgun sequencing from the tannery effluent‐contaminated soil. Six OXR‐encoding genes were expressed in Escherichia coli, and OXR activity was confirmed by in situ quantitative assays. The six proteins were subjected to phylogenetic and evolutionary analysis. Further, detailed structural analysis of the two OXRs, namely, OXR3 and OXR8 with lowest and highest activity respectively, were investigated in silico for structural characteristics. The results revealed that both the proteins were soluble FMN‐linked oxidoreductases. Eight conserved active site residues (Pro24, Thr26, Ala59, Tyr139, His178, Tyr180, His219, Tyr221, Arg269, and Lys360) in the enzyme OXR3 were predicted. Similarly, nine conserved active site residues (Pro20, Thr22, Ala55, Glu97, His191, Tyr193, Arg241, Cys334, and Arg335) were predicted in OXR8. The tertiary structure of OXR8 was an aldolase TIM barrel structure, like Thermus scotoductus chromate reductase. Docking with FMN revealed the involvement of all the nine predicted active site residues in FMN binding with Pro20, Thr22, and Cys334 as the most important ones.

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Section: Introductionmentioning

confidence: 99%

In silico analysis of chromium‐reducing OXR genes derived from tannery effluent‐contaminated soil metagenome

Singh,

Patel,

Varma

et al. 2024

CLEAN Soil Air Water

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“…For example, manganese (Mn) is an essential trace element for the human body, but excessive intake can result in neurological disorders [ 8 , 9 ]. Chromium (Cr) may cause hemolysis, renal failure, liver failure, and lead to various types of malignant tumors, particularly lung cancer [ 10 ]. Hence, to reduce the environmental and human health risks related to heavy metal pollution, it is crucial to have a method for the rapid and sensitive detection of Cr 3+ and Mn 2+ .…”

Section: Introductionmentioning

confidence: 99%

Rapid Determination of Cr3+ and Mn2+ in Water Using Laser-Induced Breakdown Spectroscopy Combined with Filter Paper Modified with Gold Nanoclusters

Dai,

Song,

et al. 2024

Biosensors

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Excessive emissions of heavy metals not only cause environmental pollution but also pose a direct threat to human health. Therefore, rapid and accurate detection of heavy metals in the environment is of great significance. Herein, we propose a method based on laser-induced breakdown spectroscopy (LIBS) combined with filter paper modified with bovine serum albumin-protected gold nanoclusters (LIBS-FP-AuNCs) for the rapid and sensitive detection of Cr3+ and Mn2+. The filter paper modified with AuNCs was used to selectively enrich Cr3+ and Mn2+. Combined with the multi-element detection capability of LIBS, this method achieved the simultaneous rapid detection of Cr3+ and Mn2+. Both elements showed linear ranges for concentrations of 10–1000 μg L−1, with limits of detection of 7.5 and 9.0 μg L−1 for Cr3+ and Mn2+, respectively. This method was successfully applied to the determination of Cr3+ and Mn2+ in real water samples, with satisfactory recoveries ranging from 94.6% to 105.1%. This method has potential application in the analysis of heavy metal pollution.

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“…Water pollution caused by heavy metal ions has posed a serious threat to the ecological environment and human health. − Hexavalent chromium Cr(VI), as one of the ubiquitous heavy metal contaminations in the aquatic environment, − can easily pass through the cell membrane, leading to kidney, lung, skin, and liver cancer, − which has originated extensive attention of researchers due to its gene mutation and carcinogenic effect on the human body. − The World Health Organization (WHO) sets the maximum permissive limits for chromium in industrial and drinking water at 0.5 and 0.05 ppm, , respectively. Accordingly, it is of great concern to explore an efficient approach to achieve the high-sensitive detection of Cr(VI) in water systems.…”

Section: Introductionmentioning

confidence: 99%

Bridging Component Strategy in Phosphomolybdate-Based Sensors for Electrochemical Determination of Trace Cr(VI)

He,

Bi,

Liu

et al. 2023

Inorg. Chem.

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Rapid and sensitive electrochemical determination of trace carcinogenic Cr(VI) pollutants remains an urgent and important task, which requires the development of active sensing materials. Herein, four cases of reduced phosphomolybdates with formulas of the (H 2 bib) 3 [Zn(H 2 PO 4 )] 2 {Mn[P 4 Mo 6 O 31 H 7were hydrothermally synthesized under the guidance of a bridging component strategy, which function as effective electrochemical sensors to detect trace Cr(VI). The difference of hybrids 1−4 is in the inorganic moiety, in which the reduced phosphomolybdates {M[P 4 Mo V 6 O 31 ] 2 } (M{P 4 Mo 6 } 2 ) exhibited different arrangements bridged by different cationic components ({Zn(H 2 PO 4 )} subunit for 1, [Mn 2 (H 2 O) 2 ] 4+ dimer for 2, and [Mo V 2 (μ 2 -O) 2 (H 2 O) 4 ] 6+for 3). As a result, hybrids 1 and 3 display noticeable Cr(VI) detection activity with low detection limits of 14.3 nM (1.48 ppb) for 1 and 6.61 nM (0.69 ppb) for 3 and high sensitivities of 97.3 and 95.3 μA•mM −1 , respectively, which are much beyond the World Health Organization's detection threshold (0.05 ppm) and superior to those of the contrast samples (inorganic Mn{P 4 Mo 6 } 2 salt and hybrid 4), even the most reported noble-metal catalysts. This work supplies a prospective pathway to build effective electrochemical sensors based on phosphomolybdates for environmental pollutant treatment.

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Biogeochemical behaviour and toxicology of chromium in the soil-water-human nexus: A review

Cited by 44 publications

References 157 publications

In silico analysis of chromium‐reducing OXR genes derived from tannery effluent‐contaminated soil metagenome

In silico analysis of chromium‐reducing OXR genes derived from tannery effluent‐contaminated soil metagenome

Rapid Determination of Cr3+ and Mn2+ in Water Using Laser-Induced Breakdown Spectroscopy Combined with Filter Paper Modified with Gold Nanoclusters

Bridging Component Strategy in Phosphomolybdate-Based Sensors for Electrochemical Determination of Trace Cr(VI)

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