In this study, a coupling process of photocatalysis and electro-floatation was developed for removing algae and organic matters in eutrophicated raw water. A series of processes, such as individual photocatalysis, individual electro-floatation, photocatalysis and electro-floatation (combined process), were constructed to explore the effect on removing pollutants with these process and probing interaction mechanism of photocatalysis and electro-floatation. Results showed that the removal rate of soluble chemical oxygen demand (SCOD_Mn), total chemical oxygen demand (TCOD_Mn), and chlorophyll a (Chl-a) through individual photocatalysis process are 55%, 14%, and 30%, and the removal rate of above indicators through combined process are increased to 91%, 70%, and 86%. Furthermore, the presence of electro-floatation can improve the photocatalytic activity of photocatalyst, which attributes to that electro-floatation can supply abundant O₂ which is beneficial for Bi₄O₅I₂([Hmim]I)/Bi₄O₅I₂(KI) photocatalyst to generate more active species (•O₂⁻), as well as generate abundant floating microbubbles to enhance the mass transfer of pollutants and photocatalysts. This study will provide a new idea for the efficient treatment of algae and organic matter simultaneously from eutrophicated raw water and provide guarantee for in-situ eutrophication restoration of water body.

在这项研究中，开发了光催化和电浮的耦合过程，以去除富营养化原水中的藻类和有机物。构造了一系列的过程，如单独的光催化，单独的电浮，光催化和电浮（联合过程），以探索这些过程对去除污染物的作用，并探索光催化和电浮的相互作用机理。结果表明，可溶性化学需氧量（SCOD _Mn），总化学需氧量（TCOD _Mn）和叶绿素a的去除率（Chl-a）通过单独的光催化过程分别达到55％，14％和30％，并且通过联合过程将上述指标去除率分别提高到91％，70％和86％。此外，电浮选的存在可以改善光催化剂的光催化活性，这归因于电浮选可以提供丰富的O ₂，这有益于Bi ₄ O ₅ I ₂（[Hmim] I）/ Bi ₄ O ₅ I ₂（KI）光催化剂产生更多的活性物种（•Ø ₂ ^-），并产生大量的漂浮微气泡，以增强污染物和光催化剂的传质。该研究将为同时处理富营养化原水中的藻类和有机物提供新思路，并为水体原位富营养化修复提供保证。