城市纳污河流磷时空分布特征研究:以巢湖十五里河为例  

Spatially and Temporally Dynamic Variation of Phosphorus of Polluted City River:Taking Shiwuli River,Chao Lake as an Example

作　　者：宗宁[1] 龚莹[1] 张剑[1] 李玉成[1] 郑刘根[1] 谢毫 王宁[1] 

机构地区：[1]安徽大学资源与环境工程学院,安徽合肥230601 [2]煤矿生态环境保护国家工程实验室,安徽淮南232000

出　　处：《环境科学与技术》2014年第7期6-11,60,共7页Environmental Science & Technology

基　　金：国家科技支撑计划(2012BAC10B02);"十二五"国家水专项(2012ZX07103-004);国家自然科学基金(41172121;41373108);安徽大学博士启动基金(12333190121)

摘　　要：2012年,逐月采样分析了巢湖十五里河水体与表层沉积物中磷含量分布特征。结果表明:十五里河水体磷污染状况严重,正磷酸盐(DIP)年均浓度1.134 mg/L,总磷(TP)年均浓度1.876 mg/L,由上到下呈现不断积累的趋势,并与流域内富营养化水平相一致。表层沉积物生物可利用性磷(BAP)含量呈现AAP>Olsen-P>WSP>RDP的规律,丰水期(5-7月)是全年磷浓度最高时期,也是控制十五里河磷污染物汇入巢湖的重要时期;以十五里河为典型的城市纳污河流沉积物对磷污染物表现出"汇"的特征,但在丰水期表现出"源"的特征,成为重要的内源磷释放来源。Water and sediment samples of Shiwuli River, Chao Lake were collected and analyzed for the content of phosphorus once every month in 2012. Results indicated that the phosphorus pollution was serious. In accordance with the eutrophication condition of the Lake, the concentration displayed an increasing pattern, with annual concentration of DIP 1.134 mg/L and TP 1＇.876 rng/L. BAP concentration showed a rule of AAP〉Olsen-P〉 WSP〉 RDP in the sediments. Besides, the most important period to control phosphorus was wet season of May-July, which has the highest concentration. The sediments of the polluted city river released phosphorus in wet season and adsorbed phosphorus in most time of the year, thus the endogenesis release became an important reason for phosphorus pollution in polluted city river.

关 键 词：城市纳污河流 磷时空变化 十五里河 

分 类 号：X142[环境科学与工程—环境科学]