Anatoxin-a degradation by using titanium dioxide.
Anatoxin-a degradation by using titanium dioxide.
复制标题
DOI：
10.1016/j.scitotenv.2020.143590
复制
发表时间：
2020-11
期刊：
影响因子：
--
通讯作者：
Ariel Kaminski;C. Edwards;E. Chrapusta-Srebrny;L. Lawton
中科院分区：
文献类型：
--
作者：
Ariel Kaminski;C. Edwards;E. Chrapusta-Srebrny;L. Lawton
正在开发高级氧化工艺，例如使用二氧化钛（TiO 2）催化剂，以减少或消除处理过的水的毒性。研究了UV-A/TiO_2光催化剂对纯化类毒素-a（ANTX-a）、Dolichospermum flos-aquaecells活细胞及其细胞提取物的去除、降解产物的产生及其毒性。在UV-A光照射下，加入TiO 2后，ANTX-a的初始浓度为10 mg·L-1，在30 min内即可完全降解。在这些条件下，观察到几种分解产物，m/z比为156.11至216.1。使用Thamnotoxkit F™毒性测试对完全降解的ANTX-α样品进行分析，显示其不再有毒。TiO_2/TiO_2对蓝藻的分解也有一定的效果。细胞结构的降解和毒素释放的降解也在30 min内完成。蓝藻培养物的早期均质化显著加速ANTX-a的降解至10 min。
Advanced oxidation processes, such as using titanium dioxide (TiO2) photocatalysis, are being developed to reduce or eliminate the toxicity of treated water. In this study, the removal of purified anatoxin-a (ANTX-a), liveDolichospermum flos-aquaecells, and a cell extract of this organism under UV-A/TiO2photocatalysis, creation of decomposition products and their toxicity were investigated. Total degradation of purified ANTX-a from the initial concentration of 10 mg·L−1with the addition of TiO2under UV-A irradiation was achieved in 30 min. Under these conditions several decomposition products were noted withm/zratio from 156.11 to 216.1. Analysis of the completely degraded ANTX-a sample using Thamnotoxkit F™ toxicity test showed that it was no longer toxic. TiO2photocatalysis was also efficient in the decomposition of the living cyanobacterial cells. Degradation of their cell structures and degradation of released toxin was also achieved in 30 min. Earlier homogenization of cyanobacteria culture significantly accelerated degradation of ANTX-a to 10 min.