[Seasonal variation characteristics of phosphorus speciation in the sediment of Changshou Lake].
[Seasonal variation characteristics of phosphorus speciation in the sediment of Changshou Lake].
复制标题
DOI：
--
复制
发表时间：
2011-07
期刊：
影响因子：
--
通讯作者：
Haifeng Guo;Jin-zhong Zhang;Shi-qiang Wei;D. Xie;Jian-Cheng Che
中科院分区：
文献类型：
--
作者：
Haifeng Guo;Jin-zhong Zhang;Shi-qiang Wei;D. Xie;Jian-Cheng Che
为进一步了解湖泊沉积物中磷形态的季节变化特征，采用SMT序贯提取法测定了2009年7月、11月和2010年3月长寿湖表层沉积物样品中不同磷形态的含量。总磷（TP）含量从高到低基本呈现枯水期、丰水期、平水期的顺序，最大值出现在 手岛（2960.29 mg/kg），管家口最低（586.05 mg/kg）。各采样点TP中水合铁/铝氧化物(Fe/Al-P)和有机磷(OP)的质量分数由高到低依次为平水期、丰水期、枯水期，其中Fe/Al-P的最大值出现在勒文(40.01%)，OP的最大值出现在坝口(72.44%)。 TP中与钙盐(Ca-P)结合的磷质量分数依次为枯水期、平水期、丰水期，最大值出现在百步荡(15.52%)。结果表明，长寿湖沉积物中磷形态表现出明显的时空分布特征，其中Fe/Al-P主要受上覆水体pH值影响，而OP受溶解氧(DO)影响不明显。
To further know the seasonal variation characteristics of phosphorus species in lake sediment, the contents of different phosphorus species in the surface sediment sampling from Changshou Lake were determined by using the SMT sequential extraction method in July and November, 2009, and March, 2010. The contents of total phosphorus (TP) basically show an order of the low-water period, high-water period, and normal-water period from high to low, and the maximum appeared in Shoudao (2960.29 mg/kg) while the minimum in Guanjiakou (586.05 mg/kg). The mass fractions of phosphorus associated with hydrous ferric/aluminum oxides (Fe/Al-P) and organic phosphorus (OP) in TP at all sampling sits are in an order of the normal-water period, high-water period, and low-water period from high to low, and the maximum of Fe/Al-P appeared in Lewen (40.01%) while that of OP in the dam mouth (72.44%). The mass fraction of phosphorus bound to calcium salt (Ca-P) in TP is in an order of the low-water period, normal-water period, and high-water period, and the maximum appeared in Baibudang (15.52%). These results suggested that the phosphorus speciation in the sediment of Changshou Lake shows obviously temporal and spatial distribution characteristics, and Fe/Al-P is mainly influenced by pH of the overlying water, while OP is not apparently influenced by dissolved oxygen (DO).