Rhizoremediation as a green technology for the remediation of petroleum hydrocarbon-contaminated soils

Hoang, Son A.; Lamb, Dane; Seshadri, Balaji; Sarkar, Binoy; Choppala, Girish; Kirkham, M.B.; Bolan, Nanthi

doi:10.1016/j.jhazmat.2020.123282

Cited by 108 publications

(35 citation statements)

References 267 publications

(393 reference statements)

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“…By contrast, low natural organic matter content reduces the sorption of organic contaminants. The modification of organic matter by long chain surfactant or natural surfactant (derived from soil microbes) can improve the sorption capacity of soil (10-30 times) to retain the organic contaminants like benzene [52] or total petroleum hydrocarbon [53]. Therefore, organic matter content and inorganic minerals are considered as static parts that regulate the sorption and release of contaminants in soils and sediments.…”

Section: (A) Sorption and Immobilizationmentioning

confidence: 99%

The role of soils in the disposition, sequestration and decontamination of environmental contaminants

Sarkar

Mukhopadhyay

Ramanayaka

et al. 2021

Phil. Trans. R. Soc. B

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Soil serves as both a ‘source’ and ‘sink’ for contaminants. As a source, contaminants are derived from both ‘geogenic’ and ‘anthropogenic’ origins. Typically, while some of the inorganic contaminants including potentially toxic elements are derived from geogenic origin (e.g. arsenic and selenium) through weathering of parent materials, the majority of organic (e.g. pesticides and microplastics) as well as inorganic (e.g. lead, cadmium) contaminants are derived from anthropogenic origin. As a sink, soil plays a critical role in the transformation of these contaminants and their subsequent transfer to environmental compartments, including groundwater (e.g. pesticides), surface water (phosphate and nitrate), ocean (e.g. microplastics) and atmosphere (e.g. nitrous oxide emission). A complex transformation process of contaminants in soil involving adsorption, precipitation, redox reactions and biodegradation control the mobility, bioavailability and environmental toxicity of these contaminants. Soil also plays a major role in the decontamination of contaminants, and the ‘cleaning’ action of soil is controlled primarily by the physico-chemical interactions of contaminants with various soil components, and the biochemical transformations facilitated by soil microorganisms. In this article, we examine the geogenic and anthropogenic sources of contaminants reaching the soil, and discuss the role of soil in the sequestration and decontamination of contaminants in relation to various physico-chemical and microbial transformation reactions of contaminants with various soil components. Finally, we propose future actions that would help to maintain the role of soils in protecting the environment from contaminants and delivering sustainable development goals. This article is part of the theme issue ‘The role of soils in delivering Nature's Contributions to People’.

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Section: (A) Sorption and Immobilizationmentioning

confidence: 99%

The role of soils in the disposition, sequestration and decontamination of environmental contaminants

Sarkar

Mukhopadhyay

Ramanayaka

et al. 2021

Phil. Trans. R. Soc. B

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“…and high molecular weight organic compounds (polysaccharides, proteins, etc.). It has been estimated that 6-21% of photosynthetically fixed carbon in plants is released through root systems [7]. Therefore, root exudates are Plant roots exude a myriad of organic substances into the surrounding soil, comprising both low molecular weight organic compounds (amino acids, organic acids, sugars, phenolics, secondary metabolites, etc.)…”

Section: The Rhizosphere Microbiomementioning

confidence: 99%

Section: The Rhizosphere Microbiomementioning

confidence: 99%

“…First, their cost is often prohibitive; for example, it can cost between Soil contamination with PHCs is an international issue, and the magnitude of soil pollution is hard to quantify. For example, in Australia, around 80,000 sites are estimated to be contaminated by PHCs [7], whereas in Canada around 22,000 federal-owned sites are identified as being contaminated by PHCs [8]. In Europe, PHC contamination was observed in at least 342,000 sites [9].…”

Section: Introductionmentioning

confidence: 99%

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Overview of Approaches to Improve Rhizoremediation of Petroleum Hydrocarbon-Contaminated Soils

Alotaibi

Hijri

St‐Arnaud

2021

Applied Microbiology

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Soil contamination with petroleum hydrocarbons (PHCs) has become a global concern and has resulted from the intensification of industrial activities. This has created a serious environmental issue; therefore, there is a need to find solutions, including application of efficient remediation technologies or improvement of current techniques. Rhizoremediation is a green technology that has received global attention as a cost-effective and possibly efficient remediation technique for PHC-polluted soil. Rhizoremediation refers to the use of plants and their associated microbiota to clean up contaminated soils, where plant roots stimulate soil microbes to mineralize organic contaminants to H2O and CO2. However, this multipartite interaction is complicated because many biotic and abiotic factors can influence microbial processes in the soil, making the efficiency of rhizoremediation unpredictable. This review reports the current knowledge of rhizoremediation approaches that can accelerate the remediation of PHC-contaminated soil. Recent approaches discussed in this review include (1) selecting plants with desired characteristics suitable for rhizoremediation; (2) exploiting and manipulating the plant microbiome by using inoculants containing plant growth-promoting rhizobacteria (PGPR) or hydrocarbon-degrading microbes, or a combination of both types of organisms; (3) enhancing the understanding of how the host–plant assembles a beneficial microbiome, and how it functions, under pollutant stress. A better understanding of plant–microbiome interactions could lead to successful use of rhizoremediation for PHC-contaminated soil in the future.

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“…Intracellular phytoremediation depends on the plant's ability to take up the organic pollutant and enzymatically transform it to less toxic or harmless products within the plant tissues [33]. Extracellular phytoremediation depends on root exudate effects, including phytostimulation [36][37][38]. In phytostimulation, plants release mixtures of chemical signals in their root exudates to stimulaterhizospheric microbial communities that degrade hydrocarbon pollutants [39,40].…”

Section: Introductionmentioning

confidence: 99%

Potentiality of Azolla pinnata R. Br. for Phytoremediation of Polluted Freshwater with Crude Petroleum Oil

et al. 2021

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The pollution of freshwater resources with crude petroleum oil is a major environmental issue in oil-producing countries. As a result, the remediation of polluted aquatic ecosystems using eco-friendly and cost-effective technology is receiving increased global attention. In this study, the ability of Azolla pinnata R. Br. to remediate petroleum-polluted freshwater was assessed. The remediation potentiality was determined by evaluating the total petroleum hydrocarbon degradation percentage (TPH%) and changes in the molecular type composition of saturated and aromatic hydrocarbon fractions. TPH% was estimated gravimetrically, and changes in the molecular type composition of saturated and aromatic fractions were measured using gas chromatography and high-performance liquid chromatography, respectively. The results reveal that A. pinnata has the potential to phytoremediate freshwater polluted with low levels (up to 0.5 g/L) of petroleum hydrocarbons (PHs). After seven days of phytoremediation, the degradation rate of total PHs was 92% in the planted treatment compared with 38% in the unplanted positive control. The highest breakdown of PHs for the normal paraffinic saturated hydrocarbon fraction occurred in the presence of A. pinnata combined with Anabena azollaea (A-A), which showed a moderate degradation capacity toward total aromatic hydrocarbons (TAHs) and total polycyclic aromatic hydrocarbons (PAHs). The results indicate that A. pinnata effectively removed C18, a saturated PH, and acenaphthene (Ace), an aromatic PH. Therefore, this study suggests that A. pinnata is a useful tool for the remediation of freshwaters contaminated with low pollution levels of crude oil.

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Rhizoremediation as a green technology for the remediation of petroleum hydrocarbon-contaminated soils

Cited by 108 publications

References 267 publications

The role of soils in the disposition, sequestration and decontamination of environmental contaminants

The role of soils in the disposition, sequestration and decontamination of environmental contaminants

Overview of Approaches to Improve Rhizoremediation of Petroleum Hydrocarbon-Contaminated Soils

Potentiality of Azolla pinnata R. Br. for Phytoremediation of Polluted Freshwater with Crude Petroleum Oil

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