Phosphorus Pollution Characters Based on Forms in the Wuliangsuhai and Daihai Lake in the Inner Mongolia Plateau, China

In this work, the pollution characters of phosphorus in the two lakes are discussed. The average concentrations of TDP, DRP and DOP in the Wuliangsuhai Lake were higher than those of the Daihai Lake. The DOP concentrations account for not less than 60% of the total dissolved phosphorus (TDP) and the DOP pools in the overlying water of the two lakes are of 12t and 10t respectively. The contents of Al-P and ACa-P in sediments from the Wuliangsuhai Lake are notably higher than those in the Daihai Lake. However, the contents of Ex-P and De-P in sediments from the Wuliangsuhai Lake are obviously lower than those in the Daihai Lake. The differences of Or-P reveal the differences of the environments and ecology types between the two lakes and the importance of the potential bioavailability of Or-P.