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An insight on pollutant removal mechanisms in phycoremediation of textile wastewater

  • Green Technology and Industrial Revolution 4.0 for a Greener Future
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Abstract

Pollutants, including dyes and heavy metals from textile industrial discharge, adversely affect the surface and groundwater resources, and pose a severe risk to the living organisms in the ecosystem. Phycoremediation of wastewater is now an emerging trend, as it is colossally available, inexpensive, eco-friendly, and has many other benefits, with high removal efficiency for undesirable substances, when compared to conventional treatment methods. Algae have a good binding affinity toward nutrients and toxic compounds because of various functional groups on its cell surface by following the mechanisms such as biosorption, bioaccumulation, or alternate biodegradation pathway. Algae-based treatments generate bioenergy feedstock as sludge, mitigate CO2, synthesize high-value-added products, and release oxygenated effluent. Algae when converted into activated carbon also show good potential against contaminants, because of its higher binding efficiency and surface area. This review provides an extensive analysis of different mechanisms involved in removal of undesirable and hazardous substances from textile wastewater using algae as green technology. It could be founded that both biosorption and biodegradation mechanisms were responsible for the removal of dye, organic, and inorganic pollutants. But for the heavy metals removal, biosorption results in higher removal efficiency. Overall, phycoremediation is a convenient technique for substantial conserving of energy demand, reducing greenhouse gas emissions, and removing pollutants.

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Abbreviations

2-OG:

2-Oxoglutarate

ADP:

Adenosine diphospate

AS:

Asparagine synthetase

ASN:

Aspargine

ASP:

Aspartate

A spat:

Aspartate aminotransferase

ATP:

Adenosine triphospate

ATPase:

ATP synthase

BOD:

Biological oxygen demand

CIT:

Citrate

COD:

Chemical oxygen demand

DO:

Dissolved oxygen

FUM:

Fumarate

GDH:

Glutamate dehydrogenase

GLN:

Glutamine

GLU:

Glutamate

GOGAT:

Glutamine 2-oxoglutarate amino transferase

GS:

Glutamine synthetase

H2PO4 :

Dihydrogen phosphate

HPO4 2− :

Monohydrogen phosphate

ICIT:

Isocitrate

MAL:

Malate

NADPH2 :

Nicotinamide‐adenine dinucleotide phosphate

OAA:

Oxaloacetate

PBR:

Photo bioreactor

Pi :

Phospate

RuBisCO:

Ribulose bisphosphate carboxylase oxygenase

RuBP:

Ribulose bisphosphate

Succ:

Succinate

Succ COA:

Succinyl-CoA

TN:

Total nitrogen

TP:

Total phosphorous

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Acknowledgements

The authors wish to thank Ms. Anto S, Research scholar, Department of Energy and Environment, National Institute Technology, Tiruchirappalli for her knowledge sharing and support.

Funding

The authors declare that no funds or grants were received to assist with the preparation of this manuscript.

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Authors and Affiliations

Authors

Contributions

Durgadevi Selvaraj: conceptualization, resources, methodology, writing—original draft. Navamani Kartic Dhayabaran: visualization, investigation, writing—review and editing and Arivazhagan Mahizhnan: supervision, conceptualization, writing—review and editing.

Corresponding author

Correspondence to Arivazhagan Mahizhnan.

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The authors have no relevant financial or non-financial interests to disclose.

Competing interests

The authors declare no competing interests.

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Selvaraj, D., Dhayabaran, N.K. & Mahizhnan, A. An insight on pollutant removal mechanisms in phycoremediation of textile wastewater. Environ Sci Pollut Res 30, 124714–124734 (2023). https://doi.org/10.1007/s11356-022-21307-6

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  • DOI: https://doi.org/10.1007/s11356-022-21307-6

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