Abstract：Migration and transformation of phosphorus forms was investigated under repeated sediment resuspension with and without the addition of algae. The sediments and overlying water were obtained from Meiliang Bay of Tai Lake. The results show that the concentrations of dissolved total phosphorus (P) in the overlying water increased by 75%, 62.5% and 18.8% under static conditions, sediment resuspension and sediment resuspension with the addition of alge, the concentrations of dissolved inorganic P under sediment resuspension and sediment resuspension with the addition of alge increased by 300% and 100%, the Ca-P decreased by 9mg/kg DW and 31mg/kg DW under sediment resuspension and sediment resuspension with the addition of alge, indicating that the release of dissolved total P and dissolved inorganic P depends on the reduction of Fe/Al-P and Ca-P in the sediments. It was attributed to sediment resuspension and algae assimilation. However, under low algae concentration, the assimilation of algae in P is lower than the readsorption of reoxidized Fe or other P binding matter, such as clays and CaCO3particles. This result was confirmed by the increase in algae available P (AAP) under sediment resuspension conditions with and without the addition of algae. Although it is difficult to measure the formation and reduction rate of AAP, AAP is a good predicator of the bioavailability of sedimentary P. The estimation of bioavailable P (BAP) in the sediments can be presented by the sum of NH4Cl-P, AAP, and %Ca-P at certain concentrations of algae owing to the assimilation of Ca-P under sediment resuspension conditions with the addition of algae.
武晓飞, 李大鹏, 汪明, 王忍, 陈俊. 反复扰动下加藻对不同形态磷相互转化的影响[J]. 中国环境科学, 2015, 35(4): 1187-1196.
WU Xiao-Fei, LI Da-Peng, WANG Ming, WANG Ren, CHEN Jun. Migration and transformation of phosphorus forms under dual effect of sediment resuspension and the addition of algae. CHINA ENVIRONMENTAL SCIENCECE, 2015, 35(4): 1187-1196.
