Transformation of BAPP under sediment disturbance of Meiliang Bay and Moon Bay in Lake Tai during spring and summer

The variation of BAPP under sediment disturbance conditions in the overlying water was investigated in the lab,and the relationship between BAPP and internal phosphorus forms on suspended solids was analyzed.The sediments were taken from Meiliang Bay and Moon Bay in Tai Lake during spring and summer.The results show that the concentrations of BAP decreased due to sediment disturbance and were reduced to about 40% of the initial state.At the same time,the concentrations of BAPP were reduced obviously,and the percentages of BAPP to BAP remained at 50%,except of Meiliang Bay in spring.Sediment disturbance improved the reduction of bioavailability of PP.The percentage of BAPP to PP was reduced to about 10% at 12 h,which was attributed to the decrease of NH 4 Cl-P and Fe / Al-P on the suspended solids.The relationship between the bioavailability of PP and the percentage of(AAP + NH 4 Cl-P) to Tot-P[r = 0.565(n = 48) ]was better.This study implied that sediment disturbance may hurdle the development of water eutrophication.