Journal
SCIENCE OF THE TOTAL ENVIRONMENT
Volume 723, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scitotenv.2020.137986
Keywords
Harmful algal blooms; UV-C irradiation; Growth suppression; Suppression mechanisms; Influencing factor
Categories
Funding
- National Key Research and Development Program of China [2018YFC0406300]
- Key Program of the National Natural Science Foundation of China [51738005]
- Major Science and Technology Program for Water Pollution Control and Treatment [2017ZX07202002]
- Science and Technology Plan Project of Beijing [Z181100005518001]
- Tsinghua University (School of Environment)-Xingrong Environment Holding Ltd. Joint Research Center for Advanced Water Technology
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UV-C irradiation has drawn much attention in recent years as a candidate for controlling harmful algal blooms (HABs). In this review, we have collated the recent knowledge about the UV-C irradiation technique for suppressing HABs, including the effectiveness, mechanisms, influencing factors, growth recovery pattern, and UV-C irradiation facilities. Most microalgal species have been proved to be effectively suppressed by UV-C irradiation and the suppression effects had positive correlation with UV-C dose. However, the effectiveness on difference algal species varied dramatically. The understanding for growth suppression mechanisms upon UV-C irradiation has been significantly deepened beyond pyrimidine dimers. The suppression effects on algal cell density were the results of UV-induced damage on nucleic acid, light harvesting and electron transfer and transportation, nitrogen fixation and assimilation, toxin synthesis, settle ability, antioxidative capacity and cellular membrane integrity. While several influencing factors, such as algal sensitivities, UV transmittance (UVT), salinity, pH, and microalgal growth recovery should be paid attention to in practical application. UV-C facilities with high maturity, especially flow-through reactors, make it possible to develop ship-born UV-C facilities and put UV-C irradiation technique into real practice on controlling HABs. (c) 2020 Elsevier B.V. All rights reserved.
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