Bioremediation of soil long-term contaminated with PAHs by algal–bacterial synergy of Chlorella sp. MM3 and Rhodococcus wratislaviensis strain 9 in slurry phase

Subashchandrabose, Suresh R.; Venkateswarlu, Kadiyala; Venkidusamy, Krishnaveni; Thavamani, Palanisami; Naidu, Ravi; Megharaj, Mallavarapu

doi:10.1016/j.scitotenv.2018.12.453

Cited by 61 publications

(20 citation statements)

References 46 publications

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“…Co-culturing approaches such as bacterial-fungal co-cultures, fungal-algal synergy, and bacterial-algal synergy are proven as the most efficient bioremedial approaches at the laboratory as well as large-scale applications (Sharma et al, 2016;Subashchandrabose et al, 2019; Table 2). During aerobic degradation, algae supply oxygen to enhance degradation.…”

Section: Co-culturesmentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons: Sources, Toxicity, and Remediation Approaches

et al. 2020

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Polycyclic aromatic hydrocarbons (PAHs) are widespread across the globe mainly due to long-term anthropogenic sources of pollution. The inherent properties of PAHs such as heterocyclic aromatic ring structures, hydrophobicity, and thermostability have made them recalcitrant and highly persistent in the environment. PAH pollutants have been determined to be highly toxic, mutagenic, carcinogenic, teratogenic, and immunotoxicogenic to various life forms. Therefore, this review discusses the primary sources of PAH emissions, exposure routes, and toxic effects on humans, in particular. This review briefly summarizes the physical and chemical PAH remediation approaches such as membrane filtration, soil washing, adsorption, electrokinetic, thermal, oxidation, and photocatalytic treatments. This review provides a detailed systematic compilation of the eco-friendly biological treatment solutions for remediation of PAHs such as microbial remediation approaches using bacteria, archaea, fungi, algae, and co-cultures. In situ and ex situ biological treatments such as land farming, biostimulation, bioaugmentation, phytoremediation, bioreactor, and vermiremediation approaches are discussed in detail, and a summary of the factors affecting and limiting PAH bioremediation is also discussed. An overview of emerging technologies employing multi-process combinatorial treatment approaches is given, and newer concepts on generation of value-added by-products during PAH remediation are highlighted in this review.

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Section: Co-culturesmentioning

confidence: 99%

Polycyclic Aromatic Hydrocarbons: Sources, Toxicity, and Remediation Approaches

et al. 2020

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“…The distinction from changes in the CAT activity was that the change in the SOD activity in the 16 mg/L NAs treatment group was remarkably lower than in the other treatment groups (p < 0.01). Moreover, the SOD activity decreased gradually with increasing time (48,72, and 96 h) in the same NAs treatment groups (2.0, 4.0, and 8.0 mg/L), but the CAT activity showed an increasing trend. As shown in Figure 4B, the CAT activity of H. akashiwo in the 0.5-8 mg/L treatment groups showed an increasing trend, and the CAT activity in the 16 mg/L treatment group decreased slightly.…”

Section: Effects On the Sod And Catmentioning

confidence: 86%

“…Then, the harmful substances in the tested pollutants are fully inputted into the organism, causing serious toxicity damage. According to previous studies, a high concentration of benzopyrene, a petroleum pollutant, severely damages the photosynthesis process of chlorella, causing severe damage to the photosynthesis organs of algae and serious obstruction of the photosynthetic electron transport and photosynthetic nitrogen fixation processes of algae [48]. This can cause serious damage to their growth and development.…”

Section: Discussionmentioning

confidence: 99%

Toxicity of Naphthenic Acids on the Chlorophyll Fluorescence Parameters and Antioxidant Enzyme Activity of Heterosigma akashiwo

et al. 2021

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Petroleum hydrocarbons can serve as a carbon source for marine phytoplankton; so, marine high-acid crude oil pollution events are likely to result in algal outbreaks or harmful algal blooms (HABs) in surface waters. Naphthenic acids (NAs) are the primary acidic component of crude oil, and red tide is of great concern due to its high diffusivity and strong destructive properties. It is important to study the mechanism of the toxic effect of NAs on the typical red tide algae, Heterosigma akashiwo, for the balance and stability of marine algae. The mechanism of NAs’ damage effect was investigated in terms of the antioxidant enzyme activity, cell number, the chlorophyll positive fluorescence parameters, and the cell morphology of microalgae. Experiments confirmed the hormesis of low-concentration (0.5, 2, and 4 mg/L) NAs on Heterosigma akashiwo, and the indicators of high-concentration (8 and 16 mg/L) NA exposures showed inhibition. In this study, the toxic effect of NAs on the target organism showed a clear concentration–dose relationship. The 16 mg/L NAs stress caused severe damage to the morphology and structure of the target biological cells in a short time (96 h), and the population growth decreased. The target organisms showed a staged oxidative stress response to NAs. The behavior in the low-concentration treatment groups showed toxicant excitatory effects on the photosynthetic efficiency and antioxidant enzyme activity of the target organisms. This study provides theoretical and practical data for the development of an important toxicological model of the toxicant’s excitement effects and antioxidant defense mechanisms. In addition, it provides prospective research data for the prediction and avoidance of ecological risk from NA pollution in marine environments.

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“…There have been several recent studies on the use of microorganisms to remediate sites polluted with metal combinations (e.g., Cameron, Mata & Riquelme, 2018 ; Choinska-Pulit, Sobolczyk-Benarek & Laba, 2018 ). Interestingly, co-inoculation approaches have proved successful when protecting alfalfa from Cu/Zn mixtures ( Jian et al, 2019 ), cleaning slurries containing heavy metal mixtures plus polycyclic aromatics ( Subashchandrabose et al., 2019 ), or phytoremediating mine tailings from a Cu, Fe, Zn, and sulfur extraction operation ( Benidire et al, 2021 ). Therefore, strain CH34 may be a good candidate to be used as a microbuial consortium member in co-inoculation schemes to take advantage of the beneficial properties and to prevent potential deleterious effects (Cillero et al submitted, Supplementary Material).…”

Section: Discussionmentioning

confidence: 99%

The multi metal-resistant bacterium Cupriavidus metallidurans CH34 affects growth and metal mobilization in Arabidopsis thaliana plants exposed to copper

Clavero-León

Ruiz

Cillero

et al. 2021

PeerJ

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Copper (Cu) is important for plant growth, but high concentrations can lead to detrimental effects such as primary root length inhibition, vegetative tissue chlorosis, and even plant death. The interaction between plant-soil microbiota and roots can potentially affect metal mobility and availability, and, therefore, overall plant metal concentration. Cupriavidus metallidurans CH34 is a multi metal-resistant bacterial model that alters metal mobility and bioavailability through ion pumping, metal complexation, and reduction processes. The interactions between strain CH34 and plants may affect the growth, metal uptake, and translocation of Arabidopsis thaliana plants that are exposed to or not exposed to Cu. In this study, we looked also at the specific gene expression changes in C. metallidurans when co-cultured with Cu-exposed A. thaliana. We found that A. thaliana’s rosette area, primary and secondary root growth, and dry weight were affected by strain CH34, and that beneficial or detrimental effects depended on Cu concentration. An increase in some plant growth parameters was observed at copper concentrations lower than 50 µM and significant detrimental effects were found at concentrations higher than 50 µM Cu. We also observed up to a 90% increase and 60% decrease in metal accumulation and mobilization in inoculated A. thaliana. In turn, copper-stressed A. thaliana altered C. metallidurans colonization, and cop genes that encoded copper resistance in strain CH34 were induced by the combination of A. thaliana and Cu. These results reveal the complexity of the plant-bacteria-metal triad and will contribute to our understanding of their applications in plant growth promotion, protection, and phytoremediation strategies.

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Bioremediation of soil long-term contaminated with PAHs by algal–bacterial synergy of Chlorella sp. MM3 and Rhodococcus wratislaviensis strain 9 in slurry phase

Cited by 61 publications

References 46 publications

Polycyclic Aromatic Hydrocarbons: Sources, Toxicity, and Remediation Approaches

Polycyclic Aromatic Hydrocarbons: Sources, Toxicity, and Remediation Approaches

Toxicity of Naphthenic Acids on the Chlorophyll Fluorescence Parameters and Antioxidant Enzyme Activity of Heterosigma akashiwo

The multi metal-resistant bacterium Cupriavidus metallidurans CH34 affects growth and metal mobilization in Arabidopsis thaliana plants exposed to copper

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