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Nanomaterials for Effective Control of Algal Blooms in Water

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Environmental Nanotechnology Volume 5

Part of the book series: Environmental Chemistry for a Sustainable World ((ECSW,volume 37))

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Abstract

Algal blooms resulted from eutrophication has increasingly occurred worldwide and poses serious threats to water environment, tourism and aquatic ecosystems. In addition, the toxins released by living or dead algae are harmful to aquatic animals or even the human body. Hence, the effective control of algal blooms becomes an urgent front-burner problem. Nanotechnology, the emerging means, has produced great repercussions in recent decades because of its unique physical and chemical properties such as small-size effect, quantum-size effect and so forth. Considering the source controlling, short-term strategy and health risk, the removal of nutrient, algae or algae toxins from the water using nanotechnology is reviewed in this text. Firstly, the removal performance and mechanisms of phosphorus by nanomaterials are summarized from the view of source controlling. And the major point is that the nanoparticles present extremely high capacity (5–200 mg P·g−1) and specific affinity to phosphorus. Then, the effect on algae removal by nanomaterials is analyzed from the short-term strategies. And the removal efficiency is increased with the dose of nanoparticles and the algae are removed and destructed through the photocatalytic oxidation. Furthermore, mechanisms of photocatalytic removal of algae are discussed. And the algae toxins (e.g. microcystin-LR) can be adsorbed or degraded by nanoparticles (e.g. magnetic materials or nano-photocatalyst). Finally, the current challenges are outlined and future directions to achieve efficient and economic control of algal blooms are discussed.

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Acknowledgments

This work was supported by the National Natural Science Foundation of China (Grant No. 51778618), which is greatly acknowledged.

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Correspondence to Rong Cheng .

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Cheng, R., Shen, Lj., Xiang, Sy., Dai, Dy., Zheng, X. (2021). Nanomaterials for Effective Control of Algal Blooms in Water. In: Dasgupta, N., Ranjan, S., Lichtfouse, E., Mishra, B.N. (eds) Environmental Nanotechnology Volume 5. Environmental Chemistry for a Sustainable World, vol 37. Springer, Cham. https://doi.org/10.1007/978-3-030-73010-9_5

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