【摘要】 该实验采用化学连续提取方法(EDTA方法)分析白洋淀底泥中磷形态,并且该底泥经过芦苇生态滤池的处理。结果表明总磷(TP)浓度高达1 597-1 860 rng/kg,远远超出试验参照的当地土壤中TP的浓度。因此,底泥中的磷很有可能超过水体中的而成为主要的可溶性磷释放源。无机磷在总磷中占到53%-68%,高于有机磷(OP)含量。钙磷(Ca-P)是无机磷的中主要磷形态,占到41%-46%。OP主要以酸可溶性有机磷形态存在,占到总有机磷的65% -95%,酸可溶性有机磷酸盐的释放可能成为导致湖泊富营养化的重要过程。更多还原

【Abstract】 A sequential extraction method (EDTA technique) was employed for the extraction of phosphorus (P) forms in sediments of eco-filters with reed-planted in the experiment and the sediment of eco-filters was from Baiyangdian Lake. The results showed that the concentration of total phosphorus (TP) in sediments ranged from 1 597-1 860 mg/kg, which was higher than that in local soil in the experiment. High concentration of TP suggested P in sediments might exceed that in water as a major source of dissolved P. The concentration of inorganic phosphorus (IP) ranged from 53%-68% of TP, which was higher than that of organic phosphorus (OP). Ca-P was the major phosphorus forms in the IP, ranged from 41%-46%. OP mainly existed in the form of acid extractable phosphorus in sediments, occupied 65%-95% of total organic phosphorus. The release of acid extractable organic phosphate in sediments might be an important process leading lake eutrophication.更多还原