新建人工湖沉积物磷形态分布及其影响因素实验  

Experiments on the feature distribution and influencing factors of sediment phosphorus in a new artificial lake

作　　者：范功端[1,2] 张智[2] 任丽平[2,3] 罗静[1,2] 向平[2] 杨冬雪[2] 

机构地区：[1]福州大学土木工程学院,福州350108 [2]重庆大学三峡库区生态环境教育部重点实验室,重庆400045 [3]西华师范大学珍稀动植物研究所,四川南充637000

出　　处：《重庆大学学报（自然科学版）》2012年第7期138-144,共7页Journal of Chongqing University

基　　金：国家科技支撑计划资助项目(2007BAB21B01);重庆市科技攻关计划资助项目(CSTC2006AB7054;CSTC2010AC7081);中央高校基本科研业务费资助(CDJXS10210003);重庆大学大型仪器设备开放基金(2010011528)

摘　　要：通过采用连续分级提取法研究了某新建人工湖沉积物磷的形态分布,并研究了环境因素(溶解氧、温度、pH值和光照)对人工湖中的沉积物磷的影响。结果表明新建人工湖沉积物中无机磷含量在总磷中占绝对优势,其中'活性磷'占总磷的12.0%～15.1%,其质量浓度分布为:缓流区>出湖口>湖心区>入湖口>滞流区;有机磷含量占总磷的3.4%～8.5%,其质量浓度分布为:出湖口>湖心区>滞流区>缓流区>入湖口。新建人工湖中的沉积物磷表现出先吸附后释放的规律;较高的温度和pH以及较低的溶解氧都会促进沉积物中磷的释放,且磷的释放量在无光照下明显高于有光照。Experiments on the features distribution of sediment phosphorus is carried out with sequential extraction method in a new artificial lake.In addition,parameters affecting the sediment phosphorus,such as pH,temperature,dissolved oxygen and light,are examined.The experimental results show that inorganic phosphorus is the most component in total phosphorus,while active phosphorus is between 12.0% and 15.1%.The mass concentration distribution of the active phosphorus in descending order is as follows： slow flow area,lake outlet,lake centre,lake entrance,stagnation zone.Also,organic phosphorus in total phosphorus is in the range of 3.4% to 8.5% and its mass concentration distribution in descending order is listed as follows： lake outlet,lake centre,stagnation zone,slow flow area,lake entrance.At the same time,sediment phosphorus affected by the environmental factors is firstly released,followed by adsorption;increasing temperature and pH is beneficial to the release of sediment phosphorus;at lower dissolved oxygen,the release of sediment phosphorus is largely improved;and the release of phosphorus in the absence of light is significantly higher than that in the presence of light.

关 键 词：沉积物 磷 人工湖 形态分布 连续提取法 

分 类 号：X524[环境科学与工程—环境工程]