Abstract:Distribution of dissolved phosphorus (P), particulate P (PP) and biavailable P (BAP) was investigated in the overlying water under sediment disturbance with algae. In addition, the contribution to P disappearance by particulate matter adsorption and algae uptake was investigated. The results show that sediment disturbance handled the algae growth and the concentration of chlorophyll a increased by 3.53 μg/L (initial chlorophyll a 30 μg/L) and 4.80 μg/L (initial chlorophyll a 120 μg/L). But, the value increased by 21.36 μg/L (initial chlorophyll a 30 μg/L) and 14.49 μg/L (initial chlorophyll a 120 μg/L) without disturbance. Accordingly, the concentration of dissolved oxygen and pH value with disturbance was lightly higher than that without disturbance. Under sediment disturbance, total P and PP increased, while dissolved total P (DTP) and dissolved inorganic P (DIP) decreased. The degradation was attributed to the particulate matter adsorption and algae uptake. The contribution of particulate matter adsorption is up to 90% under sediment disturbance. On the contrary, the contribution decreased to 60% without disturbance, but the algae uptake increased to 40%. The concentration of BAP stabilized in the experiment with and without disturbance, but the percentage of bioavailable particulate P (BAPP) increased. The percentage of BAPP to PP with disturbance is lower than that without disturbance. It is suggested that the contribution of P migration and transformation by particulate matter adsorption is more important, compared with algae uptake.
陈俊, 李大鹏, 李勇, 黄勇, 袁怡, 李祥. 底泥扰动下藻类对不同形态磷在水体中分布的影响[J]. 中国环境科学, 2015, 35(9): 2787-2793.
CHEN Jun, LI Da-Peng, LI Yong, HUANG Yong, YUAN Yi, LI Xiang. Distribution of different phosphorus forms in the overlying water under sediment disturbance with algae. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(9): 2787-2793.