title: Effect of chlorine dioxide on cyanobacterial cell integrity, toxin degradation and disinfection by-product formation.
abstract: Bench scale tests were conducted to study the effect of chlorine dioxide (ClO2) oxidation on cell integrity, toxin degradation and disinfection by-product formation of Microcystis aeruginosa. The simulated cyanobacterial suspension was prepared at a concentration of 1.0×10(6)cells/mL and the cell integrity was measured with flow cytometry. Results indicated that ClO2 can inhibit the photosynthetic capacity of M. aeruginosa cells and almost no integral cells were left after oxidation at a ClO2 dose of 1.0mg/L. The total toxin was degraded more rapidly with the ClO2 dosage increasing from 0.1mg/L to 1.0mg/L. Moreover, the damage on cell structure after oxidation resulted in released intracellular organic matter, which contributed to the formation of trihalomethanes (THMs) and haloacetic acids (HAAs) as disinfection by-products. Therefore, the use of ClO2 as an oxidant for treating algal-rich water should be carefully considered.
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors.forename: Shiqing
authors.initials: S
authors.lastname: Zhou
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China; China Academy of Urban Planning & Design, Beijing 100037, China. Electronic address: yishengshao@163.com.
authors.forename: Yisheng
authors.initials: Y
authors.lastname: Shao
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors.forename: Naiyun
authors.initials: N
authors.lastname: Gao
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors.forename: Lei
authors.initials: L
authors.lastname: Li
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors.forename: Jing
authors.initials: J
authors.lastname: Deng
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors.forename: Mingqiu
authors.initials: M
authors.lastname: Zhu
authors.affiliation: State Key Laboratory of Pollution Control and Resource Reuse, Tongji University, Shanghai 200092, China.
authors.forename: Shumin
authors.initials: S
authors.lastname: Zhu
mesh_terms: D017606:Chlorine Compounds / Q000378:metabolism / Q000633:toxicity*; D004203:Disinfection / Q000379:methods*; D046931:Microcystis / Q000187:drug effects*; D010087:Oxides / Q000378:metabolism / Q000633:toxicity*; D022882:Trihalomethanes / Q000378:metabolism*; D014871:Water Microbiology; D018508:Water Purification / Q000379:methods
chemical_list: D017606:Chlorine Compounds; D010087:Oxides; D022882:Trihalomethanes; C025109:chlorine dioxide
keywords: Cell integrity; Disinfection by-products; Oxidation; Photosynthetic capacity; Toxin degradation