区域环境与生态
江志兵,曾江宁,陈全震,郑平.滨海电厂冷却系统温升和加氯对浮游植物联合作用的模拟研究[J].环境科学学报,2009,29(2):413-419
滨海电厂冷却系统温升和加氯对浮游植物联合作用的模拟研究
- A simulation of the combined effects of temperature increase and chlorination on phytoplankton in a coastal power plant cooling system
- 基金项目:国家科技部社会公益研究专项项目(No.2004DIB3J087);国家海洋局青年科学基金项目(No.2005106);浙江省自然科学基金项目(No.Y504012);海洋公益性行业科研专项经费项目(No.200805069)
- 江志兵
- 国家海洋局海洋生态系统与生物地球化学重点实验室, 国家海洋局第二海洋研究所, 杭州 310012
- 曾江宁
- 1. 国家海洋局海洋生态系统与生物地球化学重点实验室, 国家海洋局第二海洋研究所, 杭州 310012; 2. 浙江大学环境与资源学院, 杭州 310029
- 陈全震
- 国家海洋局海洋生态系统与生物地球化学重点实验室, 国家海洋局第二海洋研究所, 杭州 310012
- 摘要:为探明当前滨海电厂冷却系统热冲击和加氯对浮游植物的影响程度,于室内对采自乐清湾的浮游植物进行短期(15、30min)温升(0、4、8、12℃)和加氯(0、1.0、1.8、3.2mg·L-1)胁迫的模拟研究.结果表明,加氯、暴露时间、加氯和温升间的交互作用对叶绿素a(Chl-a)浓度有显著影响(p<0.01),但温升对Chl-a浓度无显著影响(p>0.05).热冲击和加氯胁迫后,浮游植物细胞活性显著降低(p<0.05).加氯对Chl-a浓度及浮游植物细胞活性影响最大.目前,滨海电厂浓度为1~2mg·L-1的加氯处理对浮游植物影响较大,但温升8~12℃的热冲击对浮游植物影响不大.
- Abstract:To evaluate the effects of thermal shock and chlorination on phytoplankton in a coastal power plant cooling system, phytoplankton collected from Yueqing Bay were exposed in the laborarory to stresses of temperature increase (0, 4, 8, 12℃), chlorine dosages (0, 1.0, 1.8, 3.2 mg·L-1) under different exposure time (15, 30 min) condition. The results showed that chlorination, exposure time, and chlorination with temperature increase all significantly affected the chlorophyll a level (p<0.01), whereas temperature increase alone did not (p>0.05). The phytoplankton cell activity decreased significantly after thermal shock and chlorination (p<0.05). Chlorination was the most significant factor which affected the chlorophyll a concentration and phytoplankton cell activity. Based on these data, current chlorination at the dosage of 1~2 mg·L-1 in the coastal power plant significantly affects the phytoplankton while the thermal shock by the temperature increase of 8~12℃ does not.
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