Recent advances in bacterial biosensing and bioremediation of cadmium pollution: a mini-review

Hui, Chang-ye; Guo, Yan; Liu, Lisa; Yi, Juan

doi:10.1007/s11274-021-03198-w

Cited by 42 publications

(28 citation statements)

References 122 publications

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“…The detection limit using bacterial biosensor in the present investigation was about 0.049 μM (Fig. 4 d), which is lower than early reported CadR-based biosensor employing fluorescent reporters 5 , 21 , but still higher than the criteria maximum concentration (CMC) of cadmium in freshwater (about 0.016 μM) recommended by the United States Environmental Protection Agency (USEPA) 2 . However, the detection limit of violacein-based biosensors is similar to the permissible limits for cadmium in drinking water recommended by China, European Communities (EC), and World Health Organization (WHO) 2 .…”

Section: Resultscontrasting

confidence: 66%

“…These disadvantages seriously limit their practical applications. Naked-eye recognition of pigments induced by heavy metals has been demonstrated to be an alternative to traditional reporters 2 . We recently developed an indigoidine-based biosensor which could detect Cd(II) as low as 0.024 μM 13 .…”

Section: Resultsmentioning

confidence: 99%

“…Environmental pollution arising from Cd is a worldwide concern because of its persistence, bioaccumulation, and highly toxic properties 1 . Cd and its various compounds, as settled, soluble, bio-adsorbed, or bio-accumulated forms, are dispersed in the ecosystem, so the determination of bioavailable Cd is useful in health risk assessment of Cd pollution 2 . As an effective supplement to instrumental methods, the whole-cell biosensors have been well demonstrated to be powerful tools for predicting accumulation, translocation, and ecotoxicological effects of heavy metal pollution 3 .…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Detection of environmental pollutant cadmium in water using a visual bacterial biosensor

Hui¹,

Guo²,

et al. 2022

Sci Rep

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Cadmium (Cd) contamination in water and soil is considered an environmental pollutant. Food crops can absorb and accumulate bioavailable Cd. Continuous monitoring of Cd levels in the environment can minimize exposure and harm to humans. Visual pigments have been demonstrated to have great potential in the development of minimal-equipment biosensors. In the present study, a metabolically engineered bacterium was employed to produce blue-purple pigment violacein responsive to toxic Cd(II). The high stability of the bisindole pigment contributed to determining the violacein at wavelengths of 578 nm. Visual and quantifiable signals could be captured after a 1.5-h Cd(II) exposure. This novel biosensor showed significantly stronger responses to Cd(II) than to other heavy metals including Pb(II), Zn(II), and Hg(II). A significant increase in pigment signal was found to respond to as low as 0.049 μM Cd(II). The naked eye can detect the color change when violacein-based biosensor is exposed to 25 μM Cd(II). A high-throughput method for rapid determination of soluble Cd(II) in environmental water was developed using a colorimetric microplate.

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Section: Resultscontrasting

confidence: 66%

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Detection of environmental pollutant cadmium in water using a visual bacterial biosensor

Hui¹,

Guo²,

et al. 2022

Sci Rep

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“…Lead (Pb), cadmium (Cd), mercury (Hg), arsenic (As), and chromium (Cr) are non-threshold environmental toxins posing a significant threat to human health, which have received worldwide attention ( Balali-Mood et al, 2021 ). Non-biodegradability and bioaccumulation of heavy metal pollutions have enabled monitor and remediation of environmental heavy metals a long-term process ( Hui et al, 2021b ; Khan et al, 2021 ).…”

Section: Introductionmentioning

confidence: 99%

“…In summary, these developed MerR-based bacterial biosensors showed a specific response to Hg(II). However, almost all of the available Cd(II)-responsive bacterial biosensors showed a broad response to multiple heavy metals, especially Cd(II) and Hg(II) ( Hui et al, 2021b ). This study established a dual-sensing biosensor by inserting a MerR-based sensory module and a CadR-based sensory module into a single genetic construct.…”

Section: Introductionmentioning

confidence: 99%

Differential Detection of Bioavailable Mercury and Cadmium Based on a Robust Dual-Sensing Bacterial Biosensor

Hui¹,

Guo

et al. 2022

Front. Microbiol.

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Genetically programmed biosensors have been widely used to monitor bioavailable heavy metal pollutions in terms of their toxicity to living organisms. Most bacterial biosensors were initially designed to detect specific heavy metals such as mercury and cadmium. However, most available biosensors failed to distinguish cadmium from various heavy metals, especially mercury. Integrating diverse sensing elements into a single genetic construct or a single host strain has been demonstrated to quantify several heavy metals simultaneously. In this study, a dual-sensing construct was assembled by employing mercury-responsive regulator (MerR) and cadmium-responsive regulator (CadR) as the separate sensory elements and enhanced fluorescent protein (eGFP) and mCherry red fluorescent protein (mCherry) as the separate reporters. Compared with two corresponding single-sensing bacterial sensors, the dual-sensing bacterial sensor emitted differential double-color fluorescence upon exposure to 0–40 μM toxic Hg(II) and red fluorescence upon exposure to toxic Cd(II) below 200 μM. Bioavailable Hg(II) could be quantitatively determined using double-color fluorescence within a narrow concentration range (0–5 μM). But bioavailable Cd(II) could be quantitatively measured using red fluorescence over a wide concentration range (0–200 μM). The dual-sensing biosensor was applied to detect bioavailable Hg(II) and Cd(II) simultaneously. Significant higher red fluorescence reflected the predominant pollution of Cd(II), and significant higher green fluorescence suggested the predominant pollution of Hg(II). Our findings show that the synergistic application of various sensory modules contributes to an efficient biological device that responds to concurrent heavy metal pollutants in the environment.

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An Antioxidant, Reusable Laser Printed and Recycled Cork Paper Packaging

Zhai,

Zhong,

et al. 2024

Adv Funct Materials

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In the realm of food waste recycling, industrial suberoligneous by‐products like cork and peels, pose a challenge for value‐added conversion, primarily due to their intricate structures. This study introduces an innovative approach by utilizing recycled cork as a prime example of repurposing food waste to create a reusable and durable packaging paper. Notably, the manufacturing process of this cork‐based paper avoids the generation of waste liquids from lignin removal, effectively alleviating concerns related to liquid waste pollution. The resulting packaging paper demonstrates remarkable printability, readability, and erasability while offering reusability. Its performance can be fine‐tuned through pH value adjustments. Moreover, this packaging paper exhibits outstanding antioxidative properties and barrier properties, seamlessly integrating superb UV‐blocking proficiency and heightened visible transparency, rendering it highly appealing for sustainable food packaging applications.

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Recent advances in bacterial biosensing and bioremediation of cadmium pollution: a mini-review

Cited by 42 publications

References 122 publications

Detection of environmental pollutant cadmium in water using a visual bacterial biosensor

Detection of environmental pollutant cadmium in water using a visual bacterial biosensor

Differential Detection of Bioavailable Mercury and Cadmium Based on a Robust Dual-Sensing Bacterial Biosensor

An Antioxidant, Reusable Laser Printed and Recycled Cork Paper Packaging

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