不同扰动下外源磷在形态磷间的分布规律

发布时间：2018-01-15 14:22

本文关键词：不同扰动下外源磷在形态磷间的分布规律　出处：《环境科学》2017年11期 　论文类型：期刊论文

【摘要】：研究了3种扰动方式对外源磷在上覆水、间隙水、底泥中的数量分布的影响,并分析了内源磷形态间的转化过程.结果表明,与对照实验相比,物理扰动能促进上覆水中磷向底泥迁移,并高于生物扰动和组合扰动的促进作用,并且,三者均高于对照实验.这可归因于溶解氧的渗入.物理扰动能降低间隙水中DIP的平均含量,相比对照实验降低了12.13%(第6 d和第10 d平均值),但降低程度不如生物扰动(38.63%)和组合扰动(50.79%).3种扰动均能促进Fe/Al-P和Ca-P的形成,其中,物理扰动下Fe/Al-P和Ca-P平均形成量最大,物理扰动下AAP含量一直在减小,暗示物理扰动明显促进了AAP向闭蓄态的Fe/Al-P或者Ca-P转化.
[Abstract]:The effects of three disturbance modes on the quantity distribution of exogenous phosphorus in overlying water, interstitial water and sediment were studied, and the transformation process between endogenous phosphorus forms was analyzed. The results showed that compared with the control experiment. Physical disturbance can promote phosphorus migration to sediment in overlying water, which is higher than that of biological disturbance and combined disturbance. All of them were higher than that of the control experiment, which could be attributed to the infiltration of dissolved oxygen. The physical disturbance could reduce the average content of DIP in the interstitial water. Compared with the control experiment, it decreased 12.13% (the average value of the 6th and 10th days). However, the degree of reduction was lower than that of biological disturbance (38.63) and combined disturbance (50.79%), which could promote the formation of Fe/Al-P and Ca-P. The average formation of Fe/Al-P and Ca-P is the largest under the physical disturbance, and the AAP content is decreasing under the physical disturbance. It is suggested that the physical disturbance can obviously promote the transformation of AAP to Fe/Al-P or Ca-P.
【作者单位】：苏州科技大学环境科学与工程学院;
【基金】：国家自然科学基金项目(51278523) 江苏省“六大人才高峰”项目(2013-JNHB-022) 江苏省水处理技术与材料协同创新中心项目 2015年度研究生科研/实践创新计划项目(SKCX15_023)
【分类号】：X52
【正文快照】： 磷是导致水体富营养化的关键性限制因子[1~3].外源输入是水体中磷的主要来源之一[4].而同时底泥扰动是促使内源磷迁移转换的关键因素[5,6].近年来,有关底泥扰动对内源磷再生和形态转化的影响进行了诸多研究[7,8].风浪扰动主要侧重于对底泥微界面的改造[9],而底栖生物扰动则主

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