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长江口柱状沉积物中磷的存在形态及其分布特征研究
Authors
安明梅
王益鸣
郑爱榕
Publication date
22 May 2018
Publisher
'Guttmacher Institute'
Doi
Cite
Abstract
对长江口的柱状沉积物进行了总磷测定,并运用SEDEX方法分析了长江口柱状沉积物中5种形态磷的含量和分布。研究结果表明,柱状样沉积物不同站位各种形态磷的垂直分布各不相同,由表至底呈现多种分布状态,与沉积环境、沉积后的成岩作用有关。长江口柱状样沉积物有机磷的降解速率常数变化结果表明,长江口海域有机磷的降解主要发生在沉积物表层和次表层。2个柱状样沉积物中氮磷比远低于16∶1,说明长江口近岸海域沉积物中的磷主要来自陆源。对柱状样的年代分析表明,总磷含量随年代的变化有明显的区域特征性,长江口总磷含量的髙值与长江较大输沙量的年份具有一致性。浙江省环保科研计划项目(2008-30
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Last time updated on 10/06/2020