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Chromium effects and bioremediation
Research Guide
What is Chromium effects and bioremediation?
Chromium effects and bioremediation refers to the study of chromium's toxicity mechanisms, including genotoxicity and carcinogenicity in humans, plants, and environments, alongside microbial and plant-based processes for detoxifying chromium-contaminated sites.
This field examines over 40,025 papers on chromium's toxic effects from industrial exposure and bioremediation strategies using microbes and plants. Balali-Mood et al. (2021) detail chromium's mechanisms alongside mercury, lead, cadmium, and arsenic in human poisonings. Shanker et al. (2005) describe chromium's impact on plant physiology, while Vijayaraghavan and Yun (2008) cover bacterial biosorption for heavy metal removal.
Topic Hierarchy
Research Sub-Topics
Hexavalent Chromium Microbial Reduction
This sub-topic studies bacterial enzymes like ChrR that reduce Cr(VI) to less toxic Cr(III), including mechanisms of electron transfer and resistance. Researchers engineer strains for enhanced reduction kinetics.
Chromium Genotoxicity and Carcinogenicity Mechanisms
Examines Cr(VI) DNA adduct formation, oxidative stress, and chromosomal aberrations leading to lung cancer. Includes epidemiological data and in vitro assays on cellular transformation.
Bacterial Biosorption of Chromium
Focuses on dead biomass and exopolysaccharides binding Cr ions via ion exchange and complexation. Optimization studies cover pH, isotherms, and desorption for wastewater treatment.
Phytoremediation of Chromium Contaminated Soils
Investigates hyperaccumulator plants and rhizosphere microbes for Cr uptake and stabilization. Field trials assess translocation factors and soil health restoration.
Chromium Toxicity in Plants
Studies Cr-induced oxidative damage, nutrient inhibition, and photosynthetic disruption in crops. Includes tolerance mechanisms and chelator-assisted mitigation strategies.
Why It Matters
Chromium contamination from industrial activities poses risks to human health through mechanisms like carcinogenicity and genotoxicity, as outlined in 'Toxic Mechanisms of Five Heavy Metals: Mercury, Lead, Chromium, Cadmium, and Arsenic' by Balali-Mood et al. (2021), which reviews poisonings from these metals. In plants, chromium disrupts growth and metabolism, per 'Chromium toxicity in plants' by Shanker et al. (2005), affecting agriculture in polluted soils. Bioremediation addresses this via bacterial biosorbents that bind chromium, as in 'Bacterial biosorbents and biosorption' by Vijayaraghavan and Yun (2008), and plant biomass for wastewater treatment, shown in 'Microbial and plant derived biomass for removal of heavy metals from wastewater' by Ahluwalia and Goyal (2006). These methods support soil and water cleanup, with Bolan et al. (2013) evaluating mobilization versus immobilization in 'Remediation of heavy metal(loid)s contaminated soils – To mobilize or to immobilize?' for practical site restoration.
Reading Guide
Where to Start
'Toxic Mechanisms of Five Heavy Metals: Mercury, Lead, Chromium, Cadmium, and Arsenic' by Balali-Mood et al. (2021) provides a foundational review of chromium's health impacts alongside other metals, making it accessible for understanding toxicity basics before remediation.
Key Papers Explained
'Toxic Mechanisms of Five Heavy Metals: Mercury, Lead, Chromium, Cadmium, and Arsenic' by Balali-Mood et al. (2021) establishes chromium toxicity mechanisms, which Shanker et al. (2005) extend to 'Chromium toxicity in plants' by detailing plant-specific effects. Vijayaraghavan and Yun (2008) build on this in 'Bacterial biosorbents and biosorption' with microbial removal methods, while Bolan et al. (2013) apply these to soils in 'Remediation of heavy metal(loid)s contaminated soils – To mobilize or to immobilize?'. Ahluwalia and Goyal (2006) connect plant and microbial biomass in 'Microbial and plant derived biomass for removal of heavy metals from wastewater'.
Paper Timeline
Most-cited paper highlighted in red. Papers ordered chronologically.
Advanced Directions
Research emphasizes speciation and biosorption optimization, as in Kotaś and Stasicka (2000) 'Chromium occurrence in the environment and methods of its speciation' and Vijayaraghavan and Yun (2008), with ongoing focus on scaling immobilization techniques from Bolan et al. (2013). No recent preprints available.
Papers at a Glance
| # | Paper | Year | Venue | Citations | Open Access |
|---|---|---|---|---|---|
| 1 | Toxic Mechanisms of Five Heavy Metals: Mercury, Lead, Chromium... | 2021 | Frontiers in Pharmacology | 2.6K | ✓ |
| 2 | Chromium toxicity in plants | 2005 | Environment International | 2.0K | ✕ |
| 3 | Remediation of heavy metal(loid)s contaminated soils – To mobi... | 2013 | Journal of Hazardous M... | 1.9K | ✕ |
| 4 | The determination of chromic oxide in faeces samples by atomic... | 1962 | The Journal of Agricul... | 1.9K | ✕ |
| 5 | Bacterial biosorbents and biosorption | 2008 | Biotechnology Advances | 1.8K | ✕ |
| 6 | Activated carbons and low cost adsorbents for remediation of t... | 2006 | Journal of Hazardous M... | 1.8K | ✕ |
| 7 | Chromium occurrence in the environment and methods of its spec... | 2000 | Environmental Pollution | 1.7K | ✕ |
| 8 | Heavy metal pollution and human biotoxic effects | 2007 | International Journal ... | 1.7K | ✓ |
| 9 | Diversity of structures and properties among catalases | 2004 | Cellular and Molecular... | 1.6K | ✓ |
| 10 | Microbial and plant derived biomass for removal of heavy metal... | 2006 | Bioresource Technology | 1.6K | ✕ |
Frequently Asked Questions
What are the toxic mechanisms of chromium in humans?
Chromium induces human poisonings through oxidative stress, DNA damage, and disruption of cellular processes, as detailed alongside mercury, lead, cadmium, and arsenic in Balali-Mood et al. (2021). These effects stem from industrial exposure over the last century. Genotoxicity and carcinogenicity arise from hexavalent chromium's reactivity.
How does chromium toxicity affect plants?
Chromium inhibits plant growth, photosynthesis, and nutrient uptake, according to Shanker et al. (2005) in 'Chromium toxicity in plants'. Hexavalent forms are more toxic than trivalent ones. Plants respond with reduced biomass and altered metabolism in contaminated soils.
What methods exist for bioremediation of chromium-contaminated soils?
Bolan et al. (2013) compare mobilization and immobilization techniques in 'Remediation of heavy metal(loid)s contaminated soils – To mobilize or to immobilize?', including microbial reduction and adsorption. Bacterial biosorbents effectively remove chromium via biosorption, per Vijayaraghavan and Yun (2008). Plant-derived biomass also sequesters heavy metals from wastewater, as in Ahluwalia and Goyal (2006).
How do bacteria contribute to chromium bioremediation?
Bacteria use biosorption to bind and remove chromium from solutions, with mechanisms including ion exchange and complexation, as reviewed in 'Bacterial biosorbents and biosorption' by Vijayaraghavan and Yun (2008). This applies to hexavalent and trivalent forms. Microbial processes reduce toxicity in water and soil matrices.
What is the role of hexavalent chromium in environmental pollution?
Hexavalent chromium occurs widely due to industrial activities and is highly mobile and toxic, per Kotaś and Stasicka (2000) in 'Chromium occurrence in the environment and methods of its speciation'. It contributes to genotoxicity and carcinogenicity. Speciation methods distinguish it from less toxic trivalent chromium.
What are biotoxic effects of heavy metals including chromium?
Heavy metals like chromium cause biochemical disruptions at certain concentrations and oxidation states, as in Duruibe et al. (2007) 'Heavy metal pollution and human biotoxic effects'. Bio-importance as trace elements turns harmful in excess. Conditions like oxidation state determine toxicity levels.
Open Research Questions
- ? How do microbial communities adapt genetically to reduce hexavalent chromium in diverse soil matrices?
- ? What plant physiological pathways confer resistance to chromium toxicity under varying environmental conditions?
- ? Which biosorption mechanisms in bacteria optimize chromium removal efficiency at industrial scales?
- ? How do immobilization strategies compare to mobilization in long-term remediation of chromium-polluted sites?
- ? What speciation dynamics influence chromium's bioavailability and toxicity in wastewater?
Recent Trends
The field encompasses 40,025 works with sustained interest in chromium toxicity and bioremediation, anchored by highly cited reviews like Balali-Mood et al. at 2632 citations and Shanker et al. (2005) at 1964 citations.
2021No growth rate data over 5 years or recent preprints/news reported.
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