Integrated Remediation Processes Toward Heavy Metal Removal/Recovery From Various Environments-A Review

Rajasekar, Aruliah; Selvi, A.; Theertagiri, Jayaraman; Azhagesan, Ananthaselvam; Kumar, Kuppusamy Sathish; Madhavan, Jagannathan; Rahman, Pattanathu

doi:10.3389/fenvs.2019.00066

Cited by 291 publications

(121 citation statements)

References 119 publications

Supporting

Mentioning

121

Contrasting

Order By: Relevance

“…Apart from many conventional treatment methods, various nanomaterials are also applied for the removal of heavy metals (Kahrizi et al 2016, Baby et al 2019. Nanomaterials are considered to be very efficient and prominent in the elimination of environmental contaminants (Selvi et al 2019). In this regard, here we briefly discussed the few applications and examples of these nanomaterials.…”

Section: Application Of Nanomaterials In Heavy Metals Removalmentioning

confidence: 99%

An overview of nanoscale materials on the removal of wastewater contaminants

et al. 2020

View full text Add to dashboard Cite

Growing population and climate change are increasing the challenges to the global water situation. Due to a continuous elevating level of pollution, there is the requirement of novel innovative water technologies to ensure the good supply of drinking water. This review is mainly focused on the recent advances in nanotechnology aspects for water and wastewater treatment that include nano-based materials such as nanosorbents, metal oxides of nanoscale materials, polymer-based nanosorbents, membranes of nanoscale materials (nanomembranes), carbon nanotubes (CNTs) and silver nanoparticles (AgNPs). These nanomaterials are beneficial when the properties and specific characteristics of these materials are compared with conventional processes of the wastewater treatment. The aim and objective of this review are to provide an overview of different types of nanomaterials and their applicability in the removal of heavy metals and bacterial pathogens from wastewater during the treatment process.

show abstract

Section: Application Of Nanomaterials In Heavy Metals Removalmentioning

confidence: 99%

An overview of nanoscale materials on the removal of wastewater contaminants

et al. 2020

View full text Add to dashboard Cite

show abstract

“…All treatments were tested in triplicate. Values showed the average growth rate (cm/day) 1 , growth inhibition (%) 2 , and ± standard deviation (SD ) 3 . PDA: Potato Dextrose Agar.…”

Section: Tolerance To Heavy Metalsmentioning

confidence: 99%

“…Mining is a necessary but very polluting activity. Usually, its target consists of recovering a single type of metal from mines, leaving behind rocks with a relative high content of other heavy metals, which pose a threat to living organisms and overall environmental health [1]. As a consequence of mining activities, millions of tons of mine wastes are left in the environment, which are known as mine tailings and may contain different heavy metals or semimetals [2].…”

Section: Introductionmentioning

confidence: 99%

Characterization of Fungal Endophytes Isolated from the Metal Hyperaccumulator Plant Vachellia farnesiana Growing in Mine Tailings

et al. 2020

View full text Add to dashboard Cite

Heavy metal pollution has become an environmental and health problem worldwide. With the aim of finding novel strategies for metal bioremediation, endophytic fungi from the heavy metal hyperaccumulator plant Vachellia farnesiana were isolated and characterized. The plants were growing in mine tailings, rich in Zn, Pb, and Cu. Morphological and phylogenetic analyses indicated that the fungal strains belonged to Neocosmospora and Aspergillus genera. The Neocosmospora isolate belongs to the Fusarium solani species complex (FSSC) that groups phytopathogen species. However, in this case the plants from which it was isolated did not show any signs of disease. Both fungal strains were able to remove significant amounts of heavy metals from liquid cultures, either in a mixture of the three metals or each metal in a single culture. In response to lead exposure, the Neocosmospora sp. strain secreted specific novel phenolic compounds other than anthraquinones or naphtoquinones, which have been described in similar situations. The Aspergillus sp. dropped the pH in the medium. High-performance liquid chromatography determinations indicated that this strain secreted mainly glutamic acid in response to lead, a novel mechanism, which has not been reported elsewhere. Malic and succinic acids were also produced in response to lead exposure. Possibly, glutamic and succinic acids (synthesized in the Krebs cycle) can be used to cope with metal toxicity due to the plant providing photosynthates to the fungus. These fungi showed the potential to be used for bioremediation or restoration of metal-polluted environments.

show abstract

“…Heavy metals are one of the most important environmental pollutants. Unlike organic substances, metals cannot be degraded by biological or chemical means and this makes them very hazardous substances that can have harmful effects on ecosystems [13,14]. Lead, cadmium, chromium and nickel belong to the most widespread heavy metals in environment and are considered as non-essential (highly toxic) trace elements.…”

Section: Introductionmentioning

confidence: 99%

Azolla filiculoides L. as a source of metal-tolerant microorganisms

et al. 2020

View full text Add to dashboard Cite

The metal hyperaccumulator Azolla filiculoides is accompanied by a microbiome potentially supporting plant during exposition to heavy metals. We hypothesized that the microbiome exposition to selected heavy metals will reveal metal tolerant strains. We used Next Generation Sequencing technique to identify possible metal tolerant strains isolated from the metaltreated plant (Pb, Cd, Cr(VI), Ni, Au, Ag). The main dominants were Cyanobacteria and Proteobacteria constituting together more than 97% of all reads. Metal treatment led to changes in the composition of the microbiome and showed significantly higher richness in the Pb-, Cd-and Cr-treated plant in comparison with other (95-105 versus 36-44). In these treatments the share of subdominant Actinobacteria (0.4-0.8%), Firmicutes (0.5-0.9%) and Bacteroidetes (0.2-0.9%) were higher than in non-treated plant (respectively: 0.02, 0.2 and 0.001%) and Ni-, Au-and Ag-treatments (respectively: <0.4%, <0.2% and up to 0.2%). The exception was Au-treatment displaying the abundance 1.86% of Bacteroidetes. In addition, possible metal tolerant genera, namely: Acinetobacter,

show abstract

Integrated Remediation Processes Toward Heavy Metal Removal/Recovery From Various Environments-A Review

Cited by 291 publications

References 119 publications

An overview of nanoscale materials on the removal of wastewater contaminants

An overview of nanoscale materials on the removal of wastewater contaminants

Characterization of Fungal Endophytes Isolated from the Metal Hyperaccumulator Plant Vachellia farnesiana Growing in Mine Tailings

Azolla filiculoides L. as a source of metal-tolerant microorganisms

Contact Info

Product

Resources

About