Insights into the conversion of dissolved organic phosphorus favors algal bloom, arsenate biotransformation and microcystins release of Microcystis aeruginosa  

作　　者：Xiaoyan Zhang Zhenhong Wang Zhuanxi Luo Yan Chen Xuguang Huang 

机构地区：[1]College of Chemistry,Chemical Engineering and Environment,Minnan Normal University,Key Laboratory of Modern Separation and Analysis Science and Technology,Key Laboratory of Pollution Monitoring and Control,Zhangzhou 363000,China [2]College of Chemical Engineering,Huaqiao University,Xiamen 361021,China

出　　处：《Journal of Environmental Sciences》2023年第3期205-214,共10页环境科学学报（英文版）

基　　金：supported by the National Nature Science Foundation of China (Nos. 42177384 and 41976150);the Nature Science Foundation of Fujian Province (No. 2020J01804);the Program for New Century Excellent Talents in Fujian Province University。

摘　　要：Little information is available on influences of the conversion of dissolved organic phosphorus(DOP) to inorganic phosphorus(IP) on algal growth and subsequent behaviors of arsenate(As(V)) in Microcystis aeruginosa(M. aeruginosa). In this study, the influences factors on the conversion of three typical DOP types including adenosine-5-triphosphate disodium salt(ATP), β-glycerophosphate sodium(βP) and D-glucose-6-phosphate disodium salt(GP)were investigated under different extracellular polymeric secretions(EPS) ratios from M.aeruginosa, and As(V) levels. Thus, algal growth, As(V) biotransformation and microcystins(MCs) release of M. aeruginosa were explored in the different converted DOP conditions compared with IP. Results showed that the three DOP to IP without EPS addition became in favor of algal growth during their conversion. Compared with IP, M. aeruginosa growth was thus facilitated in the three converted DOP conditions, subsequently resulting in potential algal bloom particularly at arsenic(As) contaminated water environment. Additionally, DOP after conversion could inhibit As accumulation in M. aeruginosa, thus intracellular As accumulation was lower in the converted DOP conditions than that in IP condition. As(V) biotransformation and MCs release in M. aeruginosa was impacted by different converted DOP with their different types. Specifically, DMA concentrations in media and As(III) ratios in algal cells were promoted in converted βP condition, indicating that the observed dissolved organic compositions from βP conversion could enhance As(V) reduction in M. aeruginosa and then accelerate DMA release. The obtained findings can provide better understanding of cyanobacteria blooms and As biotransformation in different DOP as the main phosphorus source.

关 键 词：Organic phosphorus ARSENATE Phosphate Methylation Extracellular polymeric secretions 

分 类 号：X52[环境科学与工程—环境工程]