玄武湖沉积物中磷的形态分布特征  

Distribution of Phosphorus Speciation in Lake Xuanwu Sediments

作　　者：丰茂武[1] 吴云海[1] 龚春生[2] 

机构地区：[1]河海大学环境科学与工程实验中心,江苏南京210098 [2]河海大学环境科学与工程学院,江苏南京210098

出　　处：《环境监测管理与技术》2007年第2期19-22,共4页The Administration and Technique of Environmental Monitoring

摘　　要：利用分级提取法分析了玄武湖的沉积磷形态,在玄武湖沉积物中,铝结合态磷的含量较低,平均值为64 mg/kg,其余形态磷中,铁结合态磷为241 mg/kg,有机磷为335 mg/kg,钙结合态磷为394 mg/kg。在环境变化的条件下,铁结合态磷可以释放到间隙水和上层水体中,是湖泊产生富营养化的重要因素;铝结合态磷由于含量少,对湖泊富营养化影响很小;钙结合态磷相对稳定且很难被生物利用,对湖泊富营养化影响不大;有机磷对水体有机负荷影响较大,并影响水体富营养化程度。Distribution of phosphorus speciation in lake Xuanwu sediments was analyzed with classification extraction method. The studies indicated that the concentration of aluminum bound phosphorus （Al -P） was low in the sediment and the average value was 64 mg/kg. Among the other speciation of phosphorus, iron bound phosphorus （ Fe - P） was 241 mg/kg, organic phosphorus （ Org - P） 335 mg/kg ,CaCO3 bound phosphorus （ Ca - P） 394 mg/kg. The Fe - P, which can be released into the gap and the upper water when environment changes, is the important factor of lake eutrophication. The Al - P has little impacted lake eutrophication because of its low concentration. The Ca - P was relatively stable and hardly used by biology. The Org - P has impacted organic load and influences lake eutrophication.

关 键 词：沉积物 分级提取 磷 形态分析 玄武湖 

分 类 号：X833[环境科学与工程—环境工程]