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| 1 | Hydropower reservoirs on the upper Mekong River modify nutrient bioavailability downstream显示文摘Hydropower development is the key strategy in many developing countries for energy supply,climate-change mitigation and economic development.However,it is commonly assumed that river dams retain nutrients and therefore reduce downstream primary productivity and fishery catches,compromising food security and causing trans-boundary disputes.Contrary to expectation,here we found that a cascade of reservoirs along the upper Mekong River increased downstream bioavailability of nitrogen andphosphorus.The dams caused phytoplankton density to increase with hydraulic residence time and stratification of the stagnant reservoirs caused hypoxia at depth.This allowed the release of bioavailable phosphorus from the sediment and an increase in dissolved inorganic nitrogen as well as a shift in nitrogen species from nitrate to ammonium,which were transported downstream by the discharge of water from the base of the dam.Our findings provide a new perspective on the environmental impacts of river dams on nutrient cycling and ecosystem functioning,with potential implications for sustainable development of hydropower worldwide. | Qiuwen Chen Wenqing Shi Jef Huisman Stephen C.Maberly Jianyun Zhang Juhua Yu Yuchen Chen Daniele Tonina Qitao Yi | 2020 | National Science Review2020，7，9： | 15 |
| 2 | Effect of Lime Nitrogen on the Transformation of Ureain Soils显示文摘EffectofLimeNitrogenontheTransformationofUreainSoilsHENIAN-ZU;YUSHEN;YEZHI-QIAN;OUYANGHANGandXIONGJIN-SHAN(DeparimentofLandSc... | HE NIAN-ZU YU SHEN YE ZHI-QIAN OUYANG HANG and XIONG JIN-SHAN(Depariment of Land Science and APPlied Chemistry, Zhejtang Agricultural University, Hangzhou 310029( China)(Institrte of Soil Science, Academia Sintica, Nanjing 210008 (China)(Juhua Gr | 1995 | Pedosphere1995，5，3： | 2 |
| 3 | Graphitic carbon nitride/ferroferric oxide/reduced graphene oxide nanocomposite as highly active visible light photocatalyst显示文摘High stability and efficient charge separation are two critical factors to construct high-performance photocatalysts.Here,an efficient strategy was provided to fabricate the nanocomposite of graphitic carbon nitride/ferroferric oxide/reduced graphene oxide(g-C_(3)N_(4)/Fe_(3)O_(4)/RGO).The degradation of rhodamine B(RhB)by g-C_(3)N_(4)/Fe_(3)O_(4)/RGO nanocomposite followed the pseudofirst-order kinetics.The g-C_(3)N_(4)/Fe_(3)O_(4)/RGO nanocomposite exhibited excellent stability and magnetically separable performance.It was ascertained that the quantum efficiency and separation efficiency of photoexcited charge carriers of g-C_(3)N_(4)/Fe_(3)O_(4)/RGO nanocomposite were obviously improved.Particularly,the g-C_(3)N_(4)/Fe_(3)O_(4)/RGO nanocomposite with 3 wt.%RGO presented 100%degradation efficiency under visible light irradiation for 75 min.The remarkable photocatalytic degradation activity is attributed to the synergistic interactions among g-C_(3)N_(4),Fe_(3)O_(4),and RGO,along with the efficient interfacial charge separation. | Juhua Luo Ziyang Dai Mengna Feng Mingmin Gu Yu Xie | 2023 | Nano Research2023，16，1： | 0 |
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