摘要
利用化学提取方法测定分析辽河吉林省段干支流沉积物中氮和磷的质量比及形态，并在实验室条件下模拟研究沉积物中氨氮和可溶性磷酸盐的释放过程.结果表明：除杨木水库与支流条子河的沉积物中总磷和总氮质量比较高（1.09~3.00 g/kg）外，其他干支流沉积物中的总磷和总氮质量比均较低（0.25~0.70 g/kg）；氨氮的质量比在杨木水库中下游的沉积物中相对较高（0.044~0.052 g/kg）；钙结合态磷、有机磷和残渣磷是总磷的主要存在形态，可交换态磷、铝结合态磷和铁结合态磷的质量比较低；酸性条件可促进沉积物释放氨氮和磷酸盐，碱性条件有利于沉积物释放氨氮；释放过程受微生物活动、pH值和溶解氧含量的影响.
The mass concentrations and species of nitrogen and phosphorus in the sediments of Liaohe River and its main tributaries in Jilin Province were analyzed by chemical extraction.The release processes of ammonia nitrogen and dissolved phosphate from the sediments were simulated under laboratory conditions.The results showed that the TN and TP mass contents were higher in the sediments of the Yangmu Reservoir and the Tiaozihe River,a Liaohe River tributary （1.09-3.00 g/kg）. The TN and TP mass contents were lower in other sediments of Liaohe River and its tributaries （0.25-0.70 g/kg）.The ammonia nitrogen mass content was relatively high in the sediments of the middle and lower reaches of the Yangmu Reservoir （0.044-0.052 g/kg）.Ca-boundp P,organic＆nbsp;phosphorus and residual phosphorus were the main forms of TP. The mass concentrations of exchangeable P,Al-bound P and Fe-bound P were low.Acidic condition promoted the release of ammonia nitrogen and phosphate from the sediments. Alkaline condition favored the release of ammonia nitrogen from the sediments.The release processes were influenced by microbial activities, pH and dissolved oxygen content.
出处
《吉林大学学报（理学版）》
CAS
CSCD
北大核心
2014年第1期137-143,共7页
Journal of Jilin University:Science Edition
基金
国家科技重大专项基金(批准号:2012ZX07202-009
2009ZX07208-006-001)
关键词
辽河
沉积物
氮
磷
释放
Liaohe River
sediment
nitrogen
phosphorus
release
