【摘 要】
：
The turuovor of phosphorus (P) in lake sediments,a major cause of eutrophication and subsequent deterioration of water quality,is in need of deep understanding.
【机 构】
：
State Key Laboratory of Lake Science and Environment,Graduate University of Chinese Academy of Scien
【基金项目】
：
国家高技术研究发展计划(863计划);the Pilot Project of Knowledge Innovation Program of Chinese Academy of Sciences;国家自然科学基金
论文部分内容阅读
The turuovor of phosphorus (P) in lake sediments,a major cause of eutrophication and subsequent deterioration of water quality,is in need of deep understanding.In this study,effects of resuspension on P release Were studied in cylindrical microcosms with Y-shape apparatus.The results indicated that there was a positive correlation between flux of suspended substance across sediment-water interface (Fss) and the wind speed,and an increasing Fss during each wind process followed by a steady state.The maximal Fss under light,moderate,and strong wind conditions were 299.9±41.1,573.4±61.7,and 2093.8+215.7 g/m2,respectively.However,flux of P across sediment-water interface (Fp) did not follow a similar pattern as Fss responding to wind intensity,which increased and reached the maximum in initial 120 min for light wind,then decreased gradually,with maximal flux of 9.4±1.9mg/m2.A rapid increase of Fp at the first 30 min was observed under moderate wind,with maximal flux of 11.2±0.6mg/m2.Surprisingly,strong wind caused less Fp than under light and moderate wind conditions with maximal flux of 3.5±0.9mg/m2.Fss in water column declined obviously during the sedimentation process after winds,but Fp varied with wind regime.No obvious difference was detected on Fp after 8 h sedimentation process,compared with the initial value,which means little redundant P left in the water column after winds.
其他文献
针对现行排污收费制度中存在的一些问题,从控制污染物总量和总产出的目标出发,建立了污染物总量动态控制模型和最优控制模型,给出了污染物总量和总产出的最优轨线及相应的最
[目的]为比较香根草、苜蓿和三叶草对土壤盐分的降解能力。[方法]用不同等级的NaCl溶液或K2SO4溶液定期、定量浇灌栽培在同质地土壤上的香根草、苜蓿和三叶草,分析香根草的成
The title compound, 1,2-bis-(p-nitro-phenylsulfonamido)-4,5-dinitrobenzene, was synthesized and characterized by elemental analysis, IR and 1H NMR. A pale yello
The degradation of formaldehyde gas was studied using UV/TiO2/O3 process under the condition of continuous flow mode.The effects of humidity,initial formaldehyd
The novel CuO-SnO2 nanocomposite oxide photocatalysts were prepared by simple co-precipitation method,and characterized by X-ray diffraction,transmission electr
目的 了解2009-2011年浙江省的HIV耐药株传播水平.方法 采用WHO的截断序贯抽样法,分别于2009、2010、2011年在浙江省AIDS疫情主要发生地区(杭州、宁波和温州)采集63例、62例
Acidithiobacillus ferrooxidans ATCC23270 and Acidithiobacillus thiooxidans TM-32 were used for bioleaching of spent refractories of aluminium and copper melting
A study was carried out at the Loess Plateau in Dongzhi,China,to test the feasibility of using secondary treatment sewage effluent and to determine whether the
本试验旨在研究不同营养水平全饲粮颗粒料对绵羊瘤胃液挥发性脂肪酸(VFA)浓度和比例的影响.选用3.5～4月龄,体重15 kg左右的陶赛特(♂)×藏羊(♀)杂交一代公羔15只,采用单因子
Methyl tert-butyl ether (MTBE),a gasoline additive,possesses serious problems to the environmental health.In the present study,a bacterial culture named A-3 whi