College of Power and Energy Engineering, Harbin Engineering University, Harbin, 150000, China.
School of Economics and Management, Harbin Engineering University, Harbin, 150000, China.
Environ Sci Pollut Res Int. 2019 Mar;26(8):7785-7792. doi: 10.1007/s11356-019-04268-1. Epub 2019 Jan 23.
A new synergistic method was developed to inactivate marine microalgae using combined longwave ultraviolet (UVA) and shortwave ultraviolet (UVC)-photocatalysis (UVA/UVC-TiO) technology. Five kinds of representative marine microalgae in three phyla were used as inactivating targets to examine the inactivation effect. Compared with the photocatalytic systems using UVA or UVC alone as the light source, the algae inactivation ratio in the newly developed system increased by 0.31 log or 0.19 log, and the chlorophyll a removal rate increased by 17.5% or 9.7%, respectively. Total suspended solids (TSS) of the seawater did not cause remarkable impact on the inactivation process, and the increase of UV radiation intensity improved the treatment effect significantly. Further, UVA/UVC-TiO treatment causes irreversible damage to microalgae cell membrane. The content of lipid peroxidation product malondialdehyde (MDA) increased rapidly within a short period of time, and a large number of proteins leaked out. The results of this study indicated that UVA/UVC-TiO was an effective method to solve the challenge of efficient inactivation of plankton in ballast water containing a high density of suspended matter.
采用长波光紫外线（UVA）与短波光紫外线（UVC）-光催化（UVA/UVC-TiO）联合技术，开发了一种新的协同灭活海洋微藻的方法。以三种门的五种代表性海洋微藻为灭活靶标，考察了灭活效果。与单独使用 UVA 或 UVC 作为光源的光催化系统相比，新系统中藻类的灭活率分别提高了 0.31 个对数和 0.19 个对数，叶绿素 a 的去除率分别提高了 17.5%和 9.7%。海水总悬浮固体（TSS）对灭活过程没有明显影响，UV 辐射强度的增加显著提高了处理效果。此外，UVA/UVC-TiO 处理会对微藻细胞膜造成不可逆的损伤。在短时间内，脂质过氧化产物丙二醛（MDA）的含量迅速增加，大量蛋白质泄漏。研究结果表明，UVA/UVC-TiO 是解决高浓度悬浮物压载水中浮游生物高效灭活这一难题的有效方法。
