北京六湖泊表层底泥磷吸附容量及潜在释放风险  

Phosphorus sorption capacity of the sediment in six lakes of Beijing and risk of potential phosphorus release

作　　者：卢少勇[1] 王佩[1,2] 王殿武[2] 陈建军[1] 

机构地区：[1]中国环境科学研究院湖泊生态环境创新基地湖泊工程中心国家环境保护湖泊污染控制重点实验室,北京100012 [2]河北农业大学资源与环境科学学院,河北保定071001

出　　处：《中国环境科学》2011年第11期1836-1841,共6页China Environmental Science

基　　金：国家水体污染控制与治理重大专项(2008ZX07101;2009ZX07101);国家"863"项目(2005AA60101005)

摘　　要：利用沉积物磷吸附指数（PSI）和磷吸附饱和度（DPS）研究了北京前海（QH）、青年湖（QNH）、昆明湖（KMH）、紫竹院湖（ZZYH）、陶然亭湖（TRTH）、红领巾湖（HEm）表层沉积物的磷吸附容量，分析了沉积物中磷的吸附饱和度（DPS）与其他指标的相关关系，并讨论了不同城市湖泊沉积物中磷的潜在释放风险．结果表明：6湖沉积物的PSI为14．9-83．3（mg·L）／（100g·umol），平均值为34．6（mg·L），（100g·umul）；DPS为7．97％-50．5％，平均值28．9％，PSI与DPS显著负相关．PSI与草酸铵提取的磷、铝（Pox,Alox）含量均为显著负相关，草酸铵提取的铁（Fe ox）是影响PSI的主导因素．DPS与沉积物中草酸铵提取的磷（Pox）含量显著正相关，主要受沉积物中原有吸附态磷的影响．此外，磷释放风险指数（ERI）计算结果表明QH、QNH、ZZYH、TRTH中的表层沉积物磷潜在释放诱发富营养化的风险均为高度风险．Phosphorus sorption capacity of the sediments were estimated by the phosphorus sorption index(PSI) and the degree of phosphorus saturation(DPS) of the sediments in the six lakes(QH,QNH,KMH,ZZYH,TRTH,HLJH) of Beijing,China.Relationship between the degree of phosphorus saturation(DPS) and other indicators were analyzed.The risk of potential phosphorus release was also investigated.The phosphorus sorption index ranged from 14.9to 83.3(mg?L)/(100g??mol),with an average of 34.6(mg?L)/(100g??mol),P sorption saturation(DPS) ranged from7.97% to 50.5% with an average of 28.9%,and(3)the PSI was significantly and negative correlated with the DPS.The phosphorus adsorption index(PSI) was very significantly and negative correlation with ammonium oxalate extraction of phosphorus and aluminum.The amorphous Fe oxide extracted from ammonium oxalate is the dominant factor in P sorption index.The degree of phosphorus saturation(DPS) was significantly positively correlated with P(Pox) extracted from ammonium oxalate,mainly due to phosphorus sorption in sediments of the original.In addition,the results of the phosphorus release risk index indicated that QH,QNH,ZZYH,TRTH might be in high potential eutrophication risk due to the release of phosphorus from the surfacial sediments.

关 键 词：磷吸附指数 磷吸附饱和度 富营养化风险 铁铝氧化物 北京六湖泊 

分 类 号：X142[环境科学与工程—环境科学]