Phycoremediation mechanisms of heavy metals using living green microalgae: physicochemical and molecular approaches for enhancing selectivity and removal capacity

Heliyon, Год журнала: 2021, Номер 7(7), С. e07609 - e07609

Опубликована: Июль 1, 2021

Heavy metal (HM) contamination of water bodies is a serious global environmental problem. Because they are not biodegradable, can accumulate in food chains, causing various signs toxicity to exposed organisms, including humans. Due its effectiveness, low cost, and ecological aspect, phycoremediation, or the use microalgae's functions treatment HMs contaminated wastewater, one most recommended processes. This study aims examine depth mechanisms involved phycoremediation by microalgae, it also provides an overview prospects for improving productivity, selectivity, cost-effectiveness this bioprocess through physicochemical genetic engineering applications. Firstly, review proposes detailed examination biosorption interactions between cell wall functional groups HMs, their complexation with extracellular polymeric substances released microalgae environment under stress conditions. Subsequently, transporters intracellular bioaccumulation as well main compartmentalization organelles, enzymatic biotransformation, photoreduction were extensively reviewed. In last section, future perspectives approaches that could be used improve phytoremediation process terms removal efficiency, selectivity targeted metal, reduction time cost discussed, which paves way large-scale application

Язык: Английский

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Wastewater treatment by microalgae

Physiologia Plantarum, Год журнала: 2021, Номер 173(2), С. 568 - 578

Опубликована: Апрель 16, 2021

Abstract The growth of the world's population increases demand for fresh water, food, energy, and technology, which in turn leads to increasing amount wastewater, produced both by domestic industrial sources. These different wastewaters contain a wide variety organic inorganic compounds can cause tremendous environmental problems if released untreated. Traditional treatment systems are usually expensive, energy demanding often still incapable solving all challenges presented wastewaters. Microalgae promising candidates wastewater reclamation as they capable reducing nitrogen phosphate well other toxic including heavy metals or pharmaceuticals. Compared traditional systems, photosynthetic microalgae require less input since use sunlight their source, at same time lower carbon footprint overall process. This mini‐review focuses on recent advances using microalgae. most common microalgal strains used this purpose described from origins. We also describe impact climate with particular focus Nordic climate.

Язык: Английский

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Microalgal bioremediation of heavy metal pollution in water: Recent advances, challenges, and prospects

Chemosphere, Год журнала: 2021, Номер 286, С. 131870 - 131870

Опубликована: Авг. 11, 2021

Язык: Английский

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Bioremediation of heavy metals from wastewater: a current perspective on microalgae-based future

Letters in Applied Microbiology, Год журнала: 2021, Номер 75(4), С. 701 - 717

Опубликована: Сен. 25, 2021

Heavy metals-containing drinking water and wastewater are posing a severe threat to the environment, living beings on land, air water. Different conventional, advanced nanomaterials-based biological method has been employed for treatment of heavy metals. Among methods, microalgae an important group micro-organisms that have numerous environmental applications can remediate metals from wastewater. Also, it advantages over conventional remediation processes. Microalgae cells uptake metal via different physiological methods utilized as nutrient source regulate its metabolic process production biomass. Furthermore, enhancement in removal efficiency be improved using strategies such immobilization algal cells, development consortia designing microalgae-based nanocomposite materials. significantly contribute towards sustainability future. Thus, review provides critical overview their existence along with negative effects humans. This insight recent nanomaterial approaches metals, overviews mechanisms potential amputation special focus is enhance

Язык: Английский

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Insights into the Domestic Wastewater Treatment (DWWT) Regimes: A Review

Water, Год журнала: 2022, Номер 14(21), С. 3542 - 3542

Опубликована: Ноя. 4, 2022

It is expected that, by 2050, the rapid rise in population and simultaneous urbanization shall deplete clean water supplies. Domestic wastewater (DWW) contains inorganic organic components that can be harmful to aquatic organisms. Traditional remediation approaches (physical, chemical biological) used on-site or off-site purify polluted domestic (activated sludge, built-wetlands, stabilization ponds, trickling filters membrane bioreactors), each has its own advantages limitations. Biosorption through microorganisms, bacteria (microbe-mediated remediation), fungi (mycoremediation) algae (phycoremediation) shown promising results removing toxic chemicals nutrients. The type of waste concentration, heterogeneity level percentage clean-up required; feasibility technique efficiency, practicability, operational difficulties, environmental impact treatment costs are all factors considered when choosing a for (DWWT). This review focuses on roles conventional methods DWWT, including their merits, demerits future prospects. promotes concept “reduce, reuse recycle” DWWT also highlights problem emerging contaminants WWT regimes. We provide insights into different filtration procedures purification techniques synergism non-conventional strategies human environment health security.

Язык: Английский

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Algae in wastewater treatment, mechanism, and application of biomass for production of value-added product

Environmental Pollution, Год журнала: 2022, Номер 309, С. 119688 - 119688

Опубликована: Июль 3, 2022

Язык: Английский

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Biopolymers production from microalgae and cyanobacteria cultivated in wastewater: Recent advances

Biotechnology Advances, Год журнала: 2022, Номер 60, С. 107999 - 107999

Опубликована: Июнь 3, 2022

Язык: Английский

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Rhizospheric bacteria: the key to sustainable heavy metal detoxification strategies

Frontiers in Microbiology, Год журнала: 2023, Номер 14

Опубликована: Июль 24, 2023

The increasing rate of industrialization, anthropogenic, and geological activities have expedited the release heavy metals (HMs) at higher concentration in environment. HM contamination resulting due to its persistent nature, injudicious use poses a potential threat by causing metal toxicities humans animals as well severe damage aquatic organisms. Bioremediation is an emerging reliable solution for mitigation these contaminants using rhizospheric microorganisms environmentally safe manner. strategies are based on exploiting microbial metabolism various approaches developed plant growth promoting bacteria (PGPB) minimize toxicity optimum levels environmental clean-up. Rhizospheric employed significant plants soil contaminated with HM. Exploitation possessing plant-beneficial traits detoxifying property economical promising approach bioremediation Microbial cells exhibit different mechanisms resistance such active transport, extra cellular barrier, extracellular intracellular sequestration, reduction Tolerance may be chromosomal or plasmid originated. Proteins MerT MerA mer operon czcCBA, ArsR, ArsA, ArsD, ArsB, ArsC genes responsible detoxification bacterial cell. This review gives insights about removal from polluted areas. In addition, it also deep mechanism action expressed detoxification. dual-purpose biological agent enhancement remediation site most future prospect this article.

Язык: Английский

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Harnessing photosynthetic microorganisms for enhanced bioremediation of microplastics: A comprehensive review

Environmental Science and Ecotechnology, Год журнала: 2024, Номер 20, С. 100407 - 100407

Опубликована: Март 5, 2024

Mismanaged plastics, upon entering the environment, undergo degradation through physicochemical and/or biological processes. This process often results in formation of microplastics (MPs), most prevalent form plastic debris (<1 mm). MPs pose severe threats to aquatic and terrestrial ecosystems, necessitating innovative strategies for effective remediation. Some photosynthetic microorganisms can degrade but there lacks a comprehensive review. Here we examine specific role photoautotrophic water soil environments biodegradation focussing on their unique ability grow persistently diverse polymers under sunlight. Notably, these cells utilise light CO2 produce valuable compounds such as carbohydrates, lipids, proteins, showcasing multifaceted environmental benefits. We address key scientific questions surrounding utilisation nanoplastics (NPs) bioremediation, discussing potential engineering enhanced efficacy. Our review highlights significance alternative biomaterials exploration strains expressing enzymes, polyethylene terephthalate (PET) hydrolases, conjunction with microalgal cyanobacterial metabolisms. Furthermore, delve into promising photo-biocatalytic approaches, emphasising coupling sunlight exposure. The integration microalgal-bacterial consortia is explored biotechnological applications against NPs pollution, synergistic effects wastewater treatment absorption nitrogen, heavy metals, phosphorous, carbon. In conclusion, this provides overview current state research use bioremediation. It underscores need continued investigation development approaches tackle global issue pollution ecosystems.

Язык: Английский

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Bioremediation of Chromium by Microorganisms and Its Mechanisms Related to Functional Groups

Journal of Chemistry, Год журнала: 2021, Номер 2021, С. 1 - 21

Опубликована: Июнь 30, 2021

Heavy metals generated mainly through many anthropogenic processes, and some natural processes have been a great environmental challenge continued to be the concern of researchers scientists. This is due their highest toxicity even at minimum concentration as they are nonbiodegradable can persist in aquatic terrestrial environments for long periods. Chromium ions, especially hexavalent ions (Cr(VI)) different industrial process such tanneries, metallurgical, petroleum, refractory, oil well drilling, electroplating, mining, textile, pulp paper industries, among toxic heavy metal which pose effects human, plants, microorganisms, lives. review work aimed biosorption chromium microbial biomass, bacteria, fungi, microalgae, factors influencing by microorganisms mechanism involved remediation functional groups participated uptake Cr(VI) from contaminated biosorbents. The relatively more advantageous over conventional technique it rapid, economical, requires minimal preparatory steps, efficient, needs no chemicals, allows regeneration biosorbent end process. Also, presence multiple cell surfaces active binding sites allow easy greater number polluted samples. could useful creating new insights into development advancement future technologies research on bioremediation scale.

Язык: Английский

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