贡湖湾水陆交错带中磷污染现状研究  

Study of Current Situation of Phosphorus Pollution of Land Water Ecotone in Gonghu Bay

作　　者：汪祖茂[1,2] 蒋丽佳[1] 卢少勇[1] 曲洁婷[1] 许秋瑾[1] 胡小贞[1] 

机构地区：[1]中国环境科学研究院,北京100012 [2]中国矿业大学(北京)地球科学与测绘工程学院,北京100083

出　　处：《环境科学与技术》2013年第S2期47-51,共5页Environmental Science & Technology

基　　金：国家水体污染控制与治理科技重大专项(2013ZX07101014-004)

摘　　要：于2012年11月和2013年5月分别对贡湖湾水陆交错带进行底泥和水体理化因子的采样调查,对比研究了水体和底泥中磷浓度的变化趋势。结果表明,贡湖湾水陆交错带退圩还湖后,随着植被自然恢复时间的延长,水体中磷的污染程度有所降低。总磷在各采样点的浓度均值由2012年11月的0.117 mg/L降到2013年5月的0.074 mg/L,溶解性总磷在各采样点的浓度均值由2012年11月的0.055 mg/L降到2013年5月的0.022 mg/L,水质从Ⅴ类提高到Ⅳ类。贡湖湾水陆交错带退圩还湖后未淹水区和淹水区底泥中总磷的浓度均呈增加趋势,未淹水区各采样点底泥中总磷的浓度均值由130.91 mg/kg增至524.79 mg/kg,淹水区各采样点底泥中总磷的浓度均值由49.28 mg/kg增至400.78 mg/kg。In November 2012 and May 2013,the water physicochemical factors and sediments of land water ecotone in Gonghu Bay were surveyed,and comparatively studied the concentration of phosphorus in water and sediments.The results showed that,the pollution of phosphorus in water decreased with the natural vegetation recovery time after the returning field in lakeside areas to Gonghu Bay.From November 2012 to May 2013,the average concentration of TP in each sample point reduced from 0.117 mg/L to 0.074 mg/L,and the average concentration of dissolved phosphorus reduced from 0.055 mg/L to 0.022mg/L. The quality of water standards raised from class Ⅴ to class Ⅳ.The concentration of phosphorus in bare soil area sediments and submerged soil area sediments both showed increasing trend after the returning field in lakeside areas to Gonghu Bay.The average concentration of TP in bare soil area sediments increased from 130.91 mg/kg to 524.79 mg/kg,and in flooded area sediments which increased from 49.28 mg/kg to 400.78 mg/kg.

关 键 词：贡湖湾 水陆交错带 底泥 磷 

分 类 号：X131.2[环境科学与工程—环境科学]