Effects of illumination on overlying water quality and on phosphate adsorption by sediment 光照對水環(huán)境變化和沉積物吸收磷酸鹽的影響
Effects of dissolved oxygen on the changes of overlying water quality and the uptake of phosphate by sediment 溶解氧對水質(zhì)變化和沉積物吸磷過程的影響
The exchange of nitrogen between disordering tide and water-sediment interface effected total nitrogen concentration of overlying water 潮流擾動和水-沉積物界面的氮素交換是影響上覆水體tn濃度的主要因素。
The violent disorder of flooding and ebbing resulted in the release of nitrogen in tidal flat sediment and overlying water so that total nitrogen concentration raised rapid on water surface 漲潮初和落潮末潮流對灘面的強烈擾動會導(dǎo)致灘面沉積物及間隙水中氮的釋放,造成上覆水體中tn濃度的迅速升高。
The effects of submerged plant on the concentrations of different nitrogen species in overlying water, porewater and sediment of different layers from water-sediment interface were investigated in simulating condition 摘要在室內(nèi)模擬條件下研究沉水植物對水沉積物界面的上覆水、不同層次的間隙水和沉積物中不同形態(tài)氮含量的影響。
The results indicated that on average the rank order of the concentrations of different nitrogen species in overlying water and porewater was organic nitrogen > ammonia > nitrate; the main form of inorganic nitrogen in sediments was of ammonia, and the submerged plant cannot change this case 結(jié)果表明:總體上,上覆水和間隙水中不同形態(tài)氮含量的順序為有機氮氨氮硝態(tài)氮;沉積物中可交換態(tài)無機氮以氨氮為主,沉水植物的存在并沒有改變這一格局。
The exchange rates of no3-n at the sediment-water interface were mainly controlled by the difference of the concentrations between the pore water and the overlying water . may be the nitrification or the denitrification and the degradation of organic matter were the key processes during the exchange of din and the processes were controlled by the temperature and the do . 3 擴散過程可能是控制no3一n界面交換速率的主要過程之一,濃度差的大小決定了其速率快慢;而發(fā)生在界面上的有機物的降解和硝化或反硝化作用可能是控制n島一n、n仇一和nh4一界面交換的主要過程,溫度和do濃度是控制這一交換過程速率的主要因子。
2 . the relationships between the nutrients exchange rates and the potential environmental controls it was observed that the exchange rates of sio3-si were correlated with the temperature, do, ph, salinity of the seawater, the water and clay contents of the sediments and the concentrations of sio3-si in the overlying water and pore water of the sediments 2、影響營養(yǎng)鹽在東海沉積物一海水界面交換速率的主要因素sio_3-si在東海沉積物?海水界面交換速率與水體溫度、do濃度、ph值、鹽度、沉積物的含水率、粘土礦物含量、間隙水中sio_3-si濃度、上覆水中sio_3-si濃度均存在很好的相關(guān)性。