scholarly journals Biostimulation for the Enhanced Degradation of Herbicides in Soil

2011 ◽  
Vol 2011 ◽  
pp. 1-10 ◽  
Author(s):  
Ramdas Gopinath Kanissery ◽  
Gerald K. Sims
Keyword(s):  
Microbial Degradation ◽  
Contaminated Soils ◽  
Environmental Concern ◽  
Organic Amendments ◽  
Time Frame ◽  
Redox Cycle ◽  
Polluted Soils ◽  
Remediation Strategy ◽  
Effective Use ◽  
Enhanced Degradation

Cleanup of herbicide-contaminated soils has been a dire environmental concern since the advent of industrial era. Although microorganisms are excellent degraders of herbicide compounds in the soil, some reparation may need to be brought about, in order to stimulate them to degrade the herbicide at a faster rate in a confined time frame. “Biostimulation” through the appropriate utilization of organic amendments and nutrients can accelerate the degradation of herbicides in the soil. However, effective use of biostimulants requires thorough comprehension of the global redox cycle during the microbial degradation of the herbicide molecules in the soil. In this paper, we present the prospects of using biostimulation as a powerful remediation strategy for the rapid cleanup of herbicide-polluted soils.

scholarly journals Bioremediation of diesel polluted soils with Eichhornia crassipes (water hyacinth)

2020 ◽  
Vol 12 (4) ◽  
pp. 920-928
Author(s):  
Saheed I. MUSA ◽  
Felix M. OKE ◽  
Charlotte C. NDIRIBE
Keyword(s):  
Soil Ph ◽  
Contaminated Soils ◽  
Water Hyacinth ◽  
Eichhornia Crassipes ◽  
Environmental Concern ◽  
Diesel Oil ◽  
Volatile Matter ◽  
Polluted Soils ◽  
Oil Processing ◽  
Before And After

Diesel oil contamination is a growing environmental concern in most crude oil processing regions of the world. This study assessed the efficacy of both fresh and powdered Eichhornia crassipes (water hyacinth) as potential biostimulants in the remediation of diesel oil contaminated soils using three test concentrations (50 g, 100 g and 150 g) and a control (0 g). The remediation process was monitored by assaying the total organic carbon (TOC), total petroleum hydrocarbon (TPH), and soil pH before and after amendment with the fresh and powdered E. crassipes for 90 days. The result showed increase in soil pH, TOC, TPH and volatile matter (VM) in comparison with the control due to soil contamination by diesel oil. However, there was a significant reduction (p < 0.05) in soil pH and TOC with the introduction of fresh and powdered E. crassipes at different concentrations. Contaminated soil amended with 100 g of fresh E. crassipes showed the highest TOC loss (59.7%) alongside soil amended with 100 g of powdered E. crassipes (47.36%) while the control showed the least TOC loss (0.91%). Similarly, soil TPH decreased significantly across all concentrations after amendment (p < 0.05). Overall, soil amended with fresh E. crassipes showed higher TPH loss than soil amended with powdered E. crassipes. This study reveals the potentials of using E. crassipes in the remediation of diesel oil contaminated soils. Above all, we demonstrate that fresh E. crassipes is a potentially stronger biostimulant than powdered E. crassipes.

scholarly journals Phytoremediation and Microorganisms-Assisted Phytoremediation of Mercury-Contaminated Soils: Challenges and Perspectives

2021 ◽  
Vol 18 (5) ◽  
pp. 2435
Author(s):  
Emanuela D. Tiodar ◽  
Cristina L. Văcar ◽  
Dorina Podar
Keyword(s):  
Contaminated Soils ◽  
Polluted Soils ◽  
Plant Growth Promoting ◽  
Bacteria And Fungi ◽  
Global Threat ◽  
Effective Use ◽  
Assisted Phytoremediation ◽  
Potential Use

Mercury (Hg) pollution is a global threat to human and environmental health because of its toxicity, mobility and long-term persistence. Although costly engineering-based technologies can be used to treat heavily Hg-contaminated areas, they are not suitable for decontaminating agricultural or extensively-polluted soils. Emerging phyto- and bioremediation strategies for decontaminating Hg-polluted soils generally involve low investment, simple operation, and in situ application, and they are less destructive for the ecosystem. Current understanding of the uptake, translocation and sequestration of Hg in plants is reviewed to highlight new avenues for exploration in phytoremediation research, and different phytoremediation strategies (phytostabilization, phytoextraction and phytovolatilization) are discussed. Research aimed at identifying suitable plant species and associated-microorganisms for use in phytoremediation of Hg-contaminated soils is also surveyed. Investigation into the potential use of transgenic plants in Hg-phytoremediation is described. Recent research on exploiting the beneficial interactions between plants and microorganisms (bacteria and fungi) that are Hg-resistant and secrete plant growth promoting compounds is reviewed. We highlight areas where more research is required into the effective use of phytoremediation on Hg-contaminated sites, and conclude that the approaches it offers provide considerable potential for the future.

scholarly journals Rapid methods for antimicrobial resistance diagnosis in contaminated soils for effective remediation strategy

2021 ◽  
Vol 137 ◽  
pp. 116203
Author(s):  
Cailing Zhou ◽  
Yuwei Pan ◽  
Shifu Ge ◽  
Frederic Coulon ◽  
Zhugen Yang
Keyword(s):  
Antimicrobial Resistance ◽  
Contaminated Soils ◽  
Remediation Strategy ◽  
Rapid Methods

A Comparison of Symmetrical and Asymmetrical Triazine Herbicides for Enhanced Degradation in Three Midwestern Soils

Weed Science ◽  
2018 ◽  
Vol 66 (5) ◽  
pp. 673-679
Author(s):  
Ethan T. Parker ◽  
Micheal D. K. Owen ◽  
Mark L. Bernards ◽  
William S. Curran ◽  
Lawrence E. Steckel ◽  
...  
Keyword(s):  
Weed Control ◽  
Herbicide Resistance ◽  
Microbial Degradation ◽  
Scientific Literature ◽  
Corn Belt ◽  
Triazine Herbicides ◽  
History Of ◽  
Enhanced Degradation

AbstractThe triazines are one of the most widely used herbicide classes ever developed and are critical for managing weed populations that have developed herbicide resistance. These herbicides are traditionally valued for their residual weed control in more than 50 crops. Scientific literature suggests that atrazine, and perhaps others-triazines, may no longer remain persistent in soils due to enhanced microbial degradation. Experiments examined the rate of degradation of atrazine and two other triazine herbicides, simazine and metribuzin, in both atrazine-adapted and non-history Corn Belt soils, with similar soils being used from each state as a comparison of potential triazine degradation. In three soils with no history of atrazine use, thet1/2of atrazine was at least four times greater than in three soils with a history of atrazine use. Simazine degradation in the same three sets of soils was 2.4 to 15 times more rapid in history soils than non-history soils. Metribuzin in history soils degraded at 0.6, 0.9, and 1.9 times the rate seen in the same three non-history soils. These results indicate enhanced degradation of the symmetrical triazine simazine, but not of the asymmetrical triazine metribuzin.

scholarly journals Assessment of Mercury-Polluted Soils Adjacent to an Old Mercury-Fulminate Production Plant

2009 ◽  
Vol 2009 ◽  
pp. 1-8 ◽  
Author(s):  
M. Camps Arbestain ◽  
L. Rodríguez-Lado ◽  
M. Bao ◽  
F. Macías
Keyword(s):  
Surface Waters ◽  
Contaminated Soils ◽  
Flow Direction ◽  
Surface Flow ◽  
Mercury Contamination ◽  
Production Plant ◽  
Polluted Soils ◽  
Flow Through ◽  
Contamination Of Soils ◽  
Surrounding Soil

Mercury contamination of soils and vegetation close to an abandoned Hg-fulminate production plant was investigated. Maximum concentrations of Hg (>6.5 gkg−1soil) were found in the soils located in the area where the wastewater produced during the washing procedures carried out at the production plant used to be discharged. A few meters away from the discharge area, Hg concentrations decreased to levels ranging between 1 and 5 gkg−1, whereas about 0.5 ha of the surrounding soil to the NE (following the dominant surface flow direction) contained between 0.1 and 1 gkg−1. Mercury contamination of soils was attributed (in addition to spills from Hg containers) to (i) Hg volatilization with subsequent condensation in cooler areas of the production plant and in the surrounding forest stands, and (ii) movement of water either by lateral subsurface flow through the contaminated soils or by heavy runoff to surface waters.

scholarly journals Using plants to remediate or manage metal-polluted soils: an overview on the current state of phytotechnologies

2021 ◽  
Vol 43 ◽  
pp. e58283
Author(s):  
Clístenes Williams Araújo do Nascimento ◽  
Caroline Miranda Biondi ◽  
Fernando Bruno Vieira da Silva ◽  
Luiz Henrique Vieira Lima
Keyword(s):  
Large Scale ◽  
State Of The Art ◽  
Cost Effective ◽  
Time Frame ◽  
Contaminated Site ◽  
Polluted Soils ◽  
Mining Sites ◽  
Current State ◽  
Remedial Actions ◽  
The Tropics

Soil contamination by metals threatens both the environment and human health and hence requires remedial actions. The conventional approach of removing polluted soils and replacing them with clean soils (excavation) is very costly for low-value sites and not feasible on a large scale. In this scenario, phytoremediation emerged as a promising cost-effective and environmentally-friendly technology to render metals less bioavailable (phytostabilization) or clean up metal-polluted soils (phytoextraction). Phytostabilization has demonstrable successes in mining sites and brownfields. On the other hand, phytoextraction still has few examples of successful applications. Either by using hyperaccumulating plants or high biomass plants induced to accumulate metals through chelator addition to the soil, major phytoextraction bottlenecks remain, mainly the extended time frame to remediation and lack of revenue from the land during the process. Due to these drawbacks, phytomanagement has been proposed to provide economic, environmental, and social benefits until the contaminated site returns to productive usage. Here, we review the evolution, promises, and limitations of these phytotechnologies. Despite the lack of commercial phytoextraction operations, there have been significant advances in understanding phytotechnologies' main constraints. Further investigation on new plant species, especially in the tropics, and soil amendments can potentially provide the basis to transform phytoextraction into an operational metal clean-up technology in the future. However, at the current state of the art, phytotechnology is moving the focus from remediation technologies to pollution attenuation and palliative cares.

Phytoremediation of contaminated soil Lead and Cadmium by Brassica júncea (L.) Czern plant

2020 ◽  
Vol 5 (4) ◽  
pp. 110-120
Author(s):  
Qunshan Wei ◽  
◽  
Bilal . ◽  
Muhammad Noman ◽  
Zhemin Shen ◽  
...  
Keyword(s):  
Brassica Juncea ◽  
Contaminated Soil ◽  
Contaminated Soils ◽  
Plant Biomass ◽  
Research Work ◽  
Alluvial Soil ◽  
Body Parts ◽  
Polluted Soils ◽  
Lead And Cadmium ◽  
Allowable Range

Many remediating strategies are used for polluted soils, however, but mostly the essential phytoremediation is a less expensive, organically satisfying technique that is generally reasonable for various countries. Pot tests were managed to dissect the Brassica júncea plant biomass cultivated on Pb as well as Cd polluted soils as well to survey its ampleness for the evacuation of Pb and Cd. Samples of picked plants developed at a blend of alluvial soil and sand were moved with vessel of pots the earth finishing extents as well allowed make with time regenerative development. Through acid digestion, Pb and Cd extraction was settled from the plant. Consequently, they were collected and afterwards examined for chosen metals through utilizing Atomic Absorption Spectrometry (AAS). Generally, the current examination results demonstrated that no hyperaccumulators of Pb as well Cd were recognized in the region. Body parts of the plant were categorized as Pb low accumulators, moderate accumulators and excluder, as well as Cd low accumulator, excluder. Additionally, Cd concentration was high up than the allowable range in species of plant. In plants, allowable range of Pb and Cd is 0.2 - 20 and 0.1 -2.4 mg kg – 1. In Brassica júncea plant the Pb as well Cd both were no hyperaccumulators. Hence, this local plant had the suitable ability to use for phytoremediation of contaminated soils around the Hayatabad Industrial area, Peshawar. All experimental Results demonstrated that from the medium of soil by Brassica júncea (L.) Czern plant the maximum lead and cadmium removals were 94 % and 94.26 %, respectively in the open environment, while in the control environment this removal was 82 % for Pb and 93.16 % for Cd .The present research work observes that brassica júncea (L.) Czern plant was more helpful for Cd take-up contrasted with Pb, and thus it is capacity we suggest Pb as well Cd for remediation from polluted soils. Keywords: Lead, Cadmium, Contaminated soil, Removal

scholarly journals New Insights into the Microbial Degradation of D-Cyphenothrin in Contaminated Water/Soil Environments

2020 ◽  
Vol 8 (4) ◽  
pp. 473 ◽  
Author(s):  
Yaohua Huang ◽  
Ziqiu Lin ◽  
Wenping Zhang ◽  
Shimei Pang ◽  
Pankaj Bhatt ◽  
...  
Keyword(s):  
Microbial Degradation ◽  
Environmental Contamination ◽  
Contaminated Soils ◽  
Culture Conditions ◽  
Synthetic Pyrethroids ◽  
Biochemical Basis ◽  
Benzenedicarboxylic Acid ◽  
Wide Range ◽  
Intermediate Metabolites ◽  
Uninoculated Control

Persistent use of the insecticide D-cyphenothrin has resulted in heavy environmental contamination and public concern. However, microbial degradation of D-cyphenothrin has never been investigated and the mechanism remains unknown. During this study, for the first time, an efficient D-cyphenothrin-degrading bacterial strain Staphylococcus succinus HLJ-10 was identified. Response surface methodology was successfully employed by using Box-Behnken design to optimize the culture conditions. At optimized conditions, over 90% degradation of D-cyphenothrin (50 mg·L−1) was achieved in a mineral salt medium within 7 d. Kinetics analysis revealed that its half-life was reduced by 61.2 d, in comparison with the uninoculated control. Eight intermediate metabolites were detected in the biodegradation pathway of D-cyphenothrin including cis-D-cyphenothrin, trans-D-cyphenothrin, 3-phenoxybenzaldehyde, α-hydroxy-3-phenoxy-benzeneacetonitrile, trans-2,2-dimethyl-3-propenyl-cyclopropanol, 2,2-dimethyl-3-propenyl-cyclopropionic acid, trans-2,2-dimethyl-3-propenyl-cyclopropionaldehyde, and 1,2-benzenedicarboxylic acid, dipropyl ester. This is the first report about the degradation of D-cyphenothrin through cleavage of carboxylester linkage and diaryl bond. In addition to degradation of D-cyphenothrin, strain HLJ-10 effectively degraded a wide range of synthetic pyrethroids including permethrin, tetramethrin, bifenthrin, allethrin, and chlorempenthrin, which are also widely used insecticides with environmental contamination problems. Bioaugmentation of D-cyphenothrin-contaminated soils with strain HLJ-10 substantially enhanced its degradation and over 72% of D-phenothrin was removed from soils within 40 d. These findings unveil the biochemical basis of a highly efficient D-cyphenothrin-degrading bacterial isolate and provide potent agents for eliminating environmental residues of pyrethroids.

Sign in / Sign up

Export Citation Format

Share Document