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A comparative study on the treatment of kitchen grey water using microalgae consortia and microalgae-synthesized silver nanoparticles

  • Multifunctional Nanomaterials for Environmental Remediation and Biological Sustainability
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Abstract

Comparative study on the potential of microalgae consortia and green-synthesized silver nanoparticles using microalgae (M-AgNP) consortia for the treatment of kitchen grey water was investigated in this study. The microalgae consortia consisting of four species, viz., Chlorella sp., Scenedesmus sp., Coelastrum sp., and Pediastrum sp. were isolated from a local fish pond and the silver nanoparticles were synthesized with the same. Thus, synthesized silver nanoparticles exhibited a distinctive yellowish-brown colour and spherical morphology. Extensive qualitative and quantitative characterization techniques were employed to determine their size and morphology. Both microalgae consortia and M-AgNP were used separately for the treatment of kitchen grey water under experimental conditions. The synthesized silver nanoparticles demonstrated promising potential for domestic wastewater treatment, leading to substantial reductions in various parameters: total dissolved solids (29.6%), conductivity (49.4%), chemical oxygen demand (64.6%), and heavy metals (arsenic—63.5%, zinc—45.6%, cadmium—88%, copper—60.52%, and lead—80.82%). Notably, microalgae exhibited superior removal efficiency for nitrate (83.1%), sulphate (70.3%), and phosphate (96.5%) compared to microalgae-synthesized silver nanoparticles. This study underscores the effective utilization of both microalgae and microalgae-synthesized silver nanoparticles for wastewater treatment applications.

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The datasets used and/or analysed during the study and the supplementary materials are available from the corresponding author on reasonable request.

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Acknowledgements

The authors are thankful to both Dr. A.P. Thomas (Director, ACESSD) and Dr. C.T. Aravindakumar (Director, IUIC), Mahatma Gandhi University, Kerala, for their research help and support. Instrumentation facility support through the schemes like KSCSTE-SARD, DST-FIST, DST-SAIF, DST-PURSE, and RUSA 2.0 Project No.4 is greatly acknowledged here. The International and Interuniversity Centre of Nanoscience and Nanotechnology (IIUCNN), MG University, is also acknowledged here for their support.

Funding

The financial support through RUSA 2.0 (RUSA MRP No.4), Mahatma Gandhi University, Kerala, by the Ministry of Education (MoE), Govt. of India, is acknowledged here. Partial support of University Grants Commission (UGC), New Delhi, India [F.41/2012 (SR)] is also received.

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AB: conceptualization; methodology; investigation; writing—original draft. SVP: conceptualization; visualization; resources; supervision; writing—review and editing. SA: review and data curation. SJ: data curation; software. All authors read and approved the final manuscript.

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Correspondence to Sylas Variyattel Paulose.

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Bindhuraj, A., Paulose, S.V., Asharaf, S. et al. A comparative study on the treatment of kitchen grey water using microalgae consortia and microalgae-synthesized silver nanoparticles. Environ Sci Pollut Res (2024). https://doi.org/10.1007/s11356-024-33655-6

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  • DOI: https://doi.org/10.1007/s11356-024-33655-6

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