Engineering biomaterials for the bioremediation: advances in nanotechnological approaches for heavy metals removal from natural resources

Sudhakar, Magapu Solomon; Aggarwal, Aakriti; Sah, Mahesh Kumar

doi:10.1016/b978-0-12-819860-5.00014-6

Cited by 6 publications

(3 citation statements)

References 79 publications

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“…The presence of capping agent secreted by microorganisms helps in avoiding aggregation of nanoparticles. Extracellular biosynthesis of nanoparticles requires no downstream processing as well as is not expensive [42].…”

Section: Properties Of Nanoparticlesmentioning

confidence: 99%

Nanotechnology for the bioremediation of heavy metals and metalloids

Sharma¹,

Sharma²

2022

J App Biol biotech

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Contamination of soil and water by heavy metals and metalloids is one of the major issues that are being raised and addressed globally as it has adverse effects on the environment as well as on human health. Since each technique has its own pros and cons, integration of a few methods helps in getting effective and efficient results. Application of nanotechnology has led to the overcoming of various drawbacks of conventional methods of remediation. Nanobioremediation is an extended branch of nanotechnology that deals with the removal of pollutants from the site of contamination by utilizing biogenic nanoparticles or materials synthesized from biological sources that are of nano size. This technique has an edge over other methods because of size of the material; smaller the size, higher would be the surface area to volume ratio and higher the ratio, more surface would be available for the reaction to occur. In recent years, the green synthesis of nanoparticles has gained enormous attention because of the economic and ecological aspects. This review highlights the implications and health risks of heavy metals and metalloids along with the application of nanotechnology in the bioremediation of these contaminants.

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Section: Properties Of Nanoparticlesmentioning

confidence: 99%

Nanotechnology for the bioremediation of heavy metals and metalloids

Sharma¹,

Sharma²

2022

J App Biol biotech

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“…Among all the examples given on Table 4 , the majority of the studies have been carried out on silver-NPs, however other approaches are being investigated too and their antimicrobial activity has been proved against plenty of microorganisms. Moreover, other approaches apart from antimicrobial or antifouling applications have been proposed, such as their use in bioremediation [ 237 ]. On the other hand, the use of algae extracts as prebiotics has also been studied.…”

Section: New Approaches and Future Perspectivesmentioning

confidence: 99%

Macroalgae as a Source of Valuable Antimicrobial Compounds: Extraction and Applications

Silva

Carpena

et al. 2020

Antibiotics

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In the last few decades, attention on new natural antimicrobial compounds has arisen due to a change in consumer preferences and the increase in the number of resistant microorganisms. Macroalgae play a special role in the pursuit of new active molecules as they have been traditionally consumed and are known for their chemical and nutritional composition and their biological properties, including antimicrobial activity. Among the bioactive molecules of algae, proteins and peptides, polysaccharides, polyphenols, polyunsaturated fatty acids and pigments can be highlighted. However, for the complete obtaining and incorporation of these molecules, it is essential to achieve easy, profitable and sustainable recovery of these compounds. For this purpose, novel liquid–liquid and solid–liquid extraction techniques have been studied, such as supercritical, ultrasound, microwave, enzymatic, high pressure, accelerated solvent and intensity pulsed electric fields extraction techniques. Moreover, different applications have been proposed for these compounds, such as preservatives in the food or cosmetic industries, as antibiotics in the pharmaceutical industry, as antibiofilm, antifouling, coating in active packaging, prebiotics or in nanoparticles. This review presents the main antimicrobial potential of macroalgae, their specific bioactive compounds and novel green extraction technologies to efficiently extract them, with emphasis on the antibacterial and antifungal data and their applications.

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“…Nanoparticles that are synthesized from the plants and microbes aids in metal removal by the process of bioremediation via adsorption, redox reaction, and photo-catalysis. Dendrimers, metal nanoparticles, carbon nanotube (CNT) can be employed as nanoparticles for the remediation of wastewater [37].…”

Section: Heavy Metalmentioning

confidence: 99%

Multi-metal resistance and potential of Alcaligenes sp. MMA for the removal of heavy metals

2020

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Pollution of water bodies is increasing because of toxic metals. In view of this, the present study examines the removal efficiency of heavy metals Cu 2+ , Cd 2+ , Cr 6+ , Ni 2+ , and Zn 2+ by a bacterial strain isolated from River Yamuna. Initially, three strains were isolated, and further examined for the maximum tolerance index. Among the three isolates, strain MMA showed the highest tolerance to the heavy metals and was selected. The biochemical characterization and phylogenetic analysis based on 16S rRNA gene sequencing showed that the strain belonged to the genus Alcaligenes. Metal removal by the strain was observed at 20 mg/L in both individual and multi-metal experimental setup. The highest metal removal within 72 h was observed for Cu 2+ (88.45%) followed by Ni 2+ (82.45%), Zn 2+ (69.99%), Cd 2+ (63.04%), and least for Cr 6+ (48.93%). Bacterial biosorption studies were done using SEM-EDX and FT-IR. Along with the metal removal, the heavy metal assessment of the River was also done for the year September 2017-August 2018, representing the post-monsoon, monsoon, and pre-monsoon. Cu 2+ , Cd 2+ , Cr 6+ , and Zn 2+ were detected in the water sample due to the uncontrolled discharge of effluents into the river.

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Engineering biomaterials for the bioremediation: advances in nanotechnological approaches for heavy metals removal from natural resources

Cited by 6 publications

References 79 publications

Nanotechnology for the bioremediation of heavy metals and metalloids

Nanotechnology for the bioremediation of heavy metals and metalloids

Macroalgae as a Source of Valuable Antimicrobial Compounds: Extraction and Applications

Multi-metal resistance and potential of Alcaligenes sp. MMA for the removal of heavy metals

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