Abstract:To make sure if the inactivation agent on the phosphorus (P) release inhibition can last for long time, the sediments from Fubao Gulf of Lake Dianchi were selected, for the experiment to study the effect of perturbance strength on the P release inactivation capability of the inactivation agent (PAC). When the speed of the stirrer was in a certain range, the inhibition of PAC on P release from the sediment was obvious. when the speeds of the stirrer were at 0r/min, 60r/min and 120r/min the amounts of P in the water were about 62.5%, 71.7% and 83.4% of the initial value, respectively. However, when the speed was at 240r/min, the sediment released a great amount of P to the overlying water, which destroyed the inhibition function of PAC on P release from the sediment. The final value was about 3.3 times of the initial amount. Moreover, the P in the overlying water was mainly composed of dissolved P which was mainly made of inorganic composition. While the perturbance strength was high enough, the ratio of DTP/TP (ratio of dissolved total P to total P) was below 30% and the DIP/DTP (ratio of dissolved inorganic total P to DTP) was below 40%, which means that undissolved phosphorus made up of the main part of the TP and most of the DTP was organic phosphorus.
郜芸, 卢少勇, 远野, 焦伟, 金相灿, 黄国忠. 扰动强度对钝化剂抑制滇池沉积物磷释放的影响[J]. 中国环境科学, 2010, 30(增刊): 75-78.
GAO Yun, LU Shao-Yong, YUAN Ye, JIAO Wei, JIN Xiang-Can, HUANG Guo-Zhong. Effects of inactivation agent on the phosphorus release from sediments of Lake Dianchi by different perturbance. CHINA ENVIRONMENTAL SCIENCECE, 2010, 30(增刊): 75-78.