沉积物磷形态分析的固体浓度效应

Solid Concentration Effect on Sediments Phosphorus Fractionation Processes

摘要: 以渤海埕岛油田区沉积物样品为例，探讨沉积物无机P形态分析过程中的固体浓度效应。4步顺序提取不同固体浓度(0.1 g/50 mL和0.2 g/50 mL)沉积物中的无机P，结果表明：沉积物中HCl-P含量最高，其次为BD-P和OH-P，含量最少的是loosely-P；沉积物磷形态分析过程中存在显著的固体浓度效应，表现为随着沉积物固体浓度增大，测得各形态P含量减少；沉积物中不同形态P受固体浓度的影响程度不同，强碱或强酸作为提取剂能有效抑制固体浓度效应，但不能完全消除。

Abstract: We performed inorganic phosphorus (P) fractionation experiments of the sediments sampled from Chengdao oil field of Bohai, to explore the solid concentration effect on the process of sediments inorganic P fractionation. Four steps sequential extraction of inorganic P from sediments with different solid concentrations (0.1 g/50 mL and 0.2 g/50 mL) were done. The results showed that: the highest content in sediment is HCl-P, followed by BD-P and OH-P, and the least is loosely-P; the P components content decreased by the increased solid concentration, which confirmed solid concentration effect have influences on the processes of sediments inorganic P fractionation; the degree of impact of solid concentration effect on different P components is not equivalent. Strong acids or alkali can effectively inhibit this impact, but cannot counteract it thoroughly.