化学氧化破坏藻体及胞内藻毒素释放特性研究  

Mechanism of Discomposing of Cyanobacterium Cells and Release of Intracellular Microcystins by Chemical Oxidation for Drinking Water Treatment

作　　者：侯翠荣[1] 贾瑞宝 

机构地区：[1]山东大学环境科学与工程学院,山东济南250061 [2]济南市给排水监测站,山东济南250033

出　　处：《中国给水排水》2006年第13期98-101,共4页China Water & Wastewater

基　　金：山东省科技攻关计划项目(022150102)

摘　　要：借助透射电子显微镜(TEM)并利用胞内、外微囊藻毒素分析技术,研究了受污染源水中铜绿微囊藻在几种水厂常用化学氧化剂作用下的藻体破坏形态特征,探讨了胞内藻毒素的释放特性及氧化剂对藻毒素的去除效果。结果表明,氯、臭氧和二氧化氯均能引起藻体破坏及胞内藻毒素的释放,其中臭氧对藻体形态的破坏最为严重,氯的作用相对较差,二氧化氯则介于二者之间;在氧化剂低投量(0.5 mg/L)下,二氧化氯引起胞内藻毒素的释放最为显著,臭氧对藻毒素的去除效果优于二氧化氯和氯。从藻毒素的安全去除角度考虑,在水处理过程中应该首选臭氧,其次为二氧化氯,氯的使用应当慎重。A TEM investigation was carried out to analyze the characteristics of the breakage of cyanobacterium cells（M, aeruginosa） after being oxidated by Cl2, ClO2 and O3 respectively. The mechanism of intracellular microcystins release and the removal effectiveness by different chemical oxidants were further studied. The results show that three kinds of oxidants can cause the discomposing of cyanobacterium cells, in which the decomposing of O3 is most serious, and cause the release of intracellular microcystins. Under the low dosage of oxidants（0.5 mg/L） , the quantity of the release of intracellular microcystins caused by ClO2 is most remarkable, and the intracellular microcystins removal by O3 proves better than that by Cl2 and ClO2. Considering the safety factor of the intracellular microcystins removal, O3 should be given top priority when choosing chemical oxidants, while Cl2 is not recommended for removing cyanobacterium microcystins in the drinking water treatment.

关 键 词：化学氧化 铜绿微囊藻 破坏作用 藻毒素释放特性 

分 类 号：TU991.25[建筑科学—市政工程]