紫外-氯联合氧化技术对典型赤潮藻的抑制效应OA

To address the problems of frequent red tides under marine eutrophication and the global spread of harmful algae(such as the typical red tide invasive species Skeletonema costatum)exacerbated by ship ballast water,this study investigated the treatment effect of UV-chlorine combined technology on typical red tide algae.The results showed that compared with UV irradiation or chlorination alone,the UV-chlorine combined treatment exhibited higher algal cell inactivation efficiency.After treatment with UV combined with 3 mg/L available chlorine for 30 minutes,the algal cell integrity decreased to 3.8％.Meanwhile,the UV-chlorine combined treatment damaged the photosynthetic system of algal cells,exacerbated membrane lipid peroxidation damage,and reduced residual chlorine content.Furthermore,the UV-chlorine combined treatment significantly inhibited algal cell photoreactivation.After combined treatment with UV and 1～3 mg/L available chlorine,the reactivation rate of Skeletonema costatum on day 8 was below 2.1％.In summary,the UV-chlorine combined oxidation technology can effectively inactivate Skeletonema costatum and inhibit its regrowth,demonstrating its potential application value to prevent the outbreak of red tides.