混盐条件下藻类生长特性及磷营养盐动力学分析  

Analysis for growth characteristics and phosphorus nutrient dynamics of algae in mesohalinous water

作　　者：焦继东 郑剑锋[1,2] 李付宽[1] 孙力平[1,2] 

机构地区：[1]天津城建大学环境与市政工程学院,天津300384 [2]天津市水质科学与技术重点实验室,天津300384

出　　处：《环境污染与防治》2017年第7期726-729,734,共5页Environmental Pollution & Control

基　　金：国家水体污染控制与治理科技重大专项(No.2012ZX07308-002);天津市自然科学基金资助项目(No.15JCYBJC49100);天津市水质科学与技术重点实验室开放基金资助项目(No.TJKLAST-2015)

摘　　要：选择天津滨海地区混盐水体,研究不同盐度下藻类演替及生长规律,并探究混盐条件下磷营养盐对藻类生长的影响,以Monod方程为理论基础,构建混盐条件下藻类生长—磷营养盐动力学模型,为混盐水体水华防治提供依据。结果表明:在盐度(以质量浓度计)<10 000mg/L的情况下,卵囊藻(Oocystissp)和铜绿微囊藻(Microcystis aeruginosa)为优势种;当盐度≥10 000mg/L时,铜绿微囊藻为优势种。盐度为10 000~20 000mg/L时,藻类适宜生长繁殖;当盐度<10 000mg/L或盐度>20 000mg/L时,藻类生长繁殖受到不同程度的抑制。当盐度为15 000mg/L的条件下,适宜藻类生长的磷营养盐(以磷计)为0.20~1.50mg/L;当磷营养盐为1.50mg/L时,比生长率最大。通过藻类生长—磷营养盐动力学分析,确定混盐条件下藻类最大比生长率为0.877d-1,半饱和常数为0.914mg/L。Aiming at the mesohalinous water bodies in coastal region of Tianjin,the growth characteristics of algae in different salinities and phosphorus nutrient concentration were studied,and a dynamic model of algae growthphosphorus nutrient for mesohalinous water based on the theory of Monod equation was built.The research results showed that：when the salinity（calculated at mass concentration）was〈 10 000 mg/L,Oocystissp and Microcystis aeruginosa were predominant algae;when the salinity was≥10 000mg/L,Microcystus aeruginosa occupied absolutely dominant position.Algae growth was always active in condition of the salinity range from 10 000mg/L to 20 000mg/L.When the salinity was less than 10 000 mg/L or more than 20 000 mg/L,the algae growth was inhibited to some extent.The phosphorus nutrient concentration ranged from 0.20 mg/L to 1.50 mg/L was suitable for algae growth with salinity of 15 000mg/L.Algae growth reached the maximum while the phosphorus nutrient concentration（calculated by phosphorus）was 1.50 mg/L.Through the analysis of the dynamic model,the maximum specific growth rate of algae was 0.877d-1,and the semi-saturation constant was 0.914mg/L.

关 键 词：盐度 优势藻 磷 动力学分析 

分 类 号：X52[环境科学与工程—环境工程]