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CO_2 emission and organic carbon burial in the Xinanjiang Reservoir

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Acta Geochimica 2017年第3期36卷 465-468页

作者： fushun wang Baoli wang Tao Zhou Tianyu Chen Jing Ma School of Environmental and Chemical Engineering Shanghai University Institute of Surface-Earth System Science Tianjin University

In order to understand the effect of river impoundment on carbon dynamics, a large reservoir in a subtropical area, the Xinanjiang Reservoir, was investigated in detail. CO_2 emissions from the water–air interface was studied, as was organic carbon burial in sediment. The results show a significant seasonal difference in CO_2 emissions. River impoundment led to the enhancement of aquatic photosynthesis, generating large amounts of authigenic organic carbon that was then buried in sediment.

关键词： The Xinanjiang Reservoir Carbon emission Sediment Carbon retention

Distributions of Picophytoplankton and Phytoplankton Pigments Along a Salinity Gradient in the Changjiang River Estuary, China

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Journal of Ocean University of China 2014年第4期13卷 621-627页

作者： wang Baoli LIU Congqiang wang fushun LI Siliang Sivaji Patra State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Institute of Applied Radiation School of Environmental and Chemical Engineering Shanghai University

We investigated the abundance of different picophytoplankton groups and the phytoplankton pigment ratio in relation to environmental factors such as nutrients and suspended solids along a salinity gradient in the Changjiang River *** average numbers of Synechococcus spp.（Syn） and picoeukaryotes （Euk） were （2.7 ±5.1）×l03 and （1.1±1.4）×l03 cells mL-1,*** spp.（Pro） was only found in the high-salinity brackish water with the concentration of 3.0× 10^3 cells *** and Euk numbers both tended to increase offshore and Syn showed a larger variation in cell abundance than *** contribution of picophytoplankton to total phytoplankton biomass increased with increasing salinity and decreasing nutrient concentrations from the estuary to the open *** response of different picophytoplankton groups to environmental variables was *** temperature was more important in its control over Euk than over Syn,while nutrients were more important in their influence over Syn than over *** pigment ratios were different in the three different ecological zones along the salinity gradient （i.e.,freshwater zone with 0-5 range,fresh and saline water mixing zone with 5-20 range,and high-salinity brackish water zone with 20-32 range）,where three different phytoplankton communities were discovered,suggesting that phytoplankton pigment ratios can be considered as a complementary indicator of phytoplankton community structure in the Changjiang River Estuary.

关键词： Synechococcus picoeukaryotes phytoplankton pigment salinity Changjiang River Estuary

Using seismic surveys to investigate sediment distribution and to estimate burial fluxes of OC, N, and P in a canyon reservoir

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Acta Geochimica 2019年第6期38卷 785-795页

作者： Ningxiao Yu Yong Qin Feng Hao Yunchao Lang fushun wang School of Environmental and Chemical Engineering Shanghai UniversityNo.99Shangda RoadBaoshan DistrictShanghai 200444China Institute of Surface-Earth System Science Tianjin University92 Weijin RoadNankai DistrictTianjin 300072China

As a high-precision survey method,seismic surveying has been increasingly applied to inland water research,although its application to artificial reservoirs has remained *** a special artificial water body,reservoirs have important effects on the fluvial transport of material from land to ocean,and inevitably have complex terrain which can complicate and distort the results of seismic ***,there are still some problems need to be resolved in the application of seismic surveys in reservoirs with complex *** this study,the Dongfeng Reservoir located in the upper reaches of the Wujiang River was chosen as an example to test the seismic survey *** testing showed that(1)because of the complex underwater terrain,the signal-to-noise ratio of the echo signal in canyon reservoir is low,making it difficult to determine sediment layers thicknesses in some areas;and(2)due to the large spatial heterogeneity of sediment distribution,insufficient density of cross-sections can lead to inaccurate interpolation *** improve the accuracy of calculations,a mathematical method was ***,the total burial mass of sediment was estimated at 2.85 x 107 tons,and the average burial rates of total organic carbon,total phosphorus,and total nitrogen were estimated at 0.194,0.011,and 0.014 g cm-2 year-1,*** values were close to the results of previous studies and hydrographic station data,indicating that seismic survey can be a reliable and efficient method for the mapping of reservoirs.

关键词： Dongfeng Reservoir Seismic survey Sedimentation Nutrients burial fluxes

Commercial Application of Technology for Catalytic Combustion of Waste Gases from Wastewater Treatment System in Petrochemical Enterprises

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China Petroleum Processing & Petrochemical Technology 2009年第3期11卷 29-32页

作者： Chen Yuxiang wang Xuehai Liu Zhongsheng wang Xin (fushun Research Institute of Petroleum and Petrochemicals,SINOPEC,fushun 113001) fushun Research Institute of Petroleum and Petrochemicals SINOPEC Fushun 113001 China

The catalytic combustion technology for treating waste gases exiting from wastewater treatment system and oil separators in petrochemical enterprises was introduced in this article. Commercial application of this technology showed that the process ＂desulfurization and total hydrocarbon concentration homogenizationcatalytic combustion＂ and the associated WSH-1 combustion catalyst were suitable for treating volatile organic gases emitted from the oil separators, floatation tanks, inlet water-collecting well, waste oil tanks, etc. The commercial unit was equipped with an advanced auto-control system, featuring a simple operation and low energy consumption with good treatment effect. The purified gases could meet the national emission standard.

关键词： wastewater treatment system catalytic combustion catalyst desulfurization total hydrocarbon concentration homogenization waste gases fouling gases nasty odor

Diurnal variations of pCO_2 in relation to environ-mental factors in the cascade reservoirs along the Wujiang River, China

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Chinese Journal Of Geochemistry 2012年第1期31卷 41-47页

作者： PENG Xi wang Baoli LIU Congqiang LIU Xiaolong wang fushun State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550002China Graduate University of Chinese Academy of Sciences Beijing 100049China Applied Radiation Institute School of Environmental and Chemical EngineeringShanghai UniversityShanghai 200433China

We have investigated the diurnal variations of the pCO2 and related environmental factors in the cascade reservoirs with different trophic levels along Wujiang River. In surface water the pCO2 was 357±11 μatm in Hong-jiadu Reservoir, 338±48 μatm in Dongfeng Reservoir, 682±303 μatm in Wujiangdu Reservoir, and 1677±429 μatm in Liuguang, respectively. The results indicated that these cascade reservoirs had much lower pCO2 values in surface water than river did, and hypereutrophic reservoir showed larger diurnal variations of pCO2 than meso-eutrophic reservoir. In water column, pCO2 tended to increase with the depth. Phytoplankton and the environmental factors such as temperature and pH had different influences on pCO2 diurnal variations due to different trophic levels, and the effect of phytoplankton on pCO2 variation increased with the increase of trophic level in these reservoirs.

关键词：乌江渡水库梯级水库日变化 pCO2 中国营养水平环境因素浮游植物

Interception, degradation and contributions of terrestrial organic carbon obtained from lignin analysis in Wujiang River, southwest China

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Acta Geochimica 2021年第6期40卷 857-870页

作者： Xin Lin Yujie wang Jinhua Zhang Ming Yang Xueping Chen fushun wang Jing Ma School of Environmental and Chemical Engineering Shanghai UniversityShanghai 200444China

Understanding the fate of terrestrial organic carbon(OC)in a cascade impoundment system is critical for recognizing the role of carbon sink for *** sediments collected from eight cascade reservoirs across the Wujiang River,southwestern China,were analyzed for elemental and stable carbon isotopic(δ^13C)composition,and lignin phenols(∑8 andΛ8)to investigate the spatial distribution,contribution,origin and degradation of sedimentary terrestrial *** values of total organic carbon(TOC)and∑8 exhibited a remarkable reduction along the upstream-downstream transect suggesting the trapping effect of cascade-damming.A relatively broad range ofδ^13C(-26.61 to-25.54%,95%CI)and C/N(6.80-18.20)indicated mixed allochthonous/autochthonous OC sources in surface *** quantitative simulation indicates that the OC of the sediments mainly was derived from terrestrial organic *** OC rather than C_(3)vascular plant-derived OC makes a major contribution to sedimentary terrestrial OC in reservoirs on karst *** evidenced by lignin compositions andδ^13C,the predominant vascular plant origins of terrestrial OC along the Wujiang River are non-woody angiosperm C_(3)*** aged reservoirs showed a trend of increasing contribution of autochthonous OC,which potentially weaken the role of carbon sink for *** relationship between runoff inputs,watershed area/water surface area ratios,and water residence time and Λ8 were explored,indicating the natural and anthropogenic influences on terrestrial OC remains very complex in a cascade-damming river.

关键词： Lignin phenols Terrestrial organic carbon Cascade impoundment

Degradation of organic matterin the sediments of Hongfeng Reservoir

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Chinese Science Bulletin 2005年第20期50卷 2377-2380页

作者： WEI Zhongqing LIU Congqiang LIANG Xiaobing wang fushun wang Shaofeng State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Graduate School of the Chinese Academy of Sciences Beijing 100039 China

In this work, the distribution of organic carbon, DNA and lipids in the sediments of Hongfeng Reservoir were described in addition to SO42? profile in pore water. The con- tents of organic carbon in the sediments range from 23.3 to 76.8 mg·g?1, with the peak value appearing at the depth of 8 cm bellow the sediments water interface (SWI), and tend to decrease gradually with sedimentation depth. The concentra- tions of SO42? decreased from 40.50 mg·L?1 to 12.00 mg·L?1 at SWI in top 4 cm sediment, and was kept at 12.0 mg·L?1 bel- low that depth. Newly produced organic carbon can be con- served as long as 14 years in the sediments. The contents of DNA were relatively high in top 9 cm surface sediments, as revealed by agarose gel images, close to those of organic car- bon and sulphate reduction index (SRI). This study shows that bacteria played an important role in organic matter degradation; SO42? is the primary electron acceptor under anaerobic condition in this reservoir; DNA in the lake sedi- ments can provide important information for the study of cycling of nutrient elements in the lake.

关键词：湖泊有机物沉积物电泳现象硫酸盐

Nitrous oxide (N_2O) emissions from a mesotrophic reservoir on the Wujiang River,southwest China

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Acta Geochimica 2017年第4期36卷 667-679页

作者： Xiaolong Liu Siliang Li Zhongliang wang Guilin Han Jun Li Baoli wang fushun wang Li Bai Tianjin Key Laboratory of Water Resources and Environment Tianjin Normal University Institute of Surface-Earth System Science Tianjin University School of Scientific Research China University of Geosciences (Beijing) Applied Radiation Institute School of Environmental and Chemical EngineeringShanghai University

Aquatic ecosystems have been identified as a globally significant source of nitrous oxide(N_2O) due to continuous active nitrogen involvement, but the processes and influencing factors that control N_2O production are still poorly understood, especially in reservoirs. For that, monthly N_2O variations were monitored in Dongfeng reservoir(DFR)with a mesotrophic condition. The dissolved N_2O concentration in DFR displayed a distinct spatial–temporal pattern but lower than that in the eutrophic reservoirs. During the whole sampling year, N_2O saturation ranging from 144% to 640%, indicating that reservoir acted as source of atmospheric N_2O. N_2O production is induced by the introduction of nitrogen(NO_3^-, NH_4^+) in mesotrophic reservoirs, and is also affected by oxygen level and water temperature. Nitrification was the predominate process for N_2O production in DFR due to well-oxygenated longitudinal water *** values of estimated N_2O flux from the air–water interface averaged 0.19 μmol m^(-2)h^(-1) with a range of 0.01–0.61 μmol m^(-2)h^(-1). DFR exhibited less N_2O emission flux than that reported in a nearby eutrophic reservoir, but still acted as a moderate N_2O source compared with other reservoirs and lakes worldwide. Annual emissions from the water–air interface of DFR were estimated to be 0.32×10~5 mol N–N_2O, while N_2O degassing from releasing water behind the dam during power generation was nearly five times greater. Hence, N_2O degassing behind the dam should be taken into account for estimation of N_2O emissions from artificial reservoirs, an omission that historically has probably resulted in underestimates. IPCC methodology should consider more specifically N_2O emission estimation in aquatic ecosystems, especially in reservoirs, the default EF5 model will lead to an overestimation.

关键词： Nitrous oxide Mesotrophic reservoir Nitrogen dynamics IPCC methodology

In-situ synthesis of nanoparticles via supersolubilizing micelle self-assembly

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Science China Chemistry 2007年第1期50卷 105-113页

作者： wang DingCong fushun Research Institute of Petroleum&Petrochemicals,China Petroleum&Chemical Corporation(SINOPEC),fushun 113001, China(email:wangdingcong@***) fushun Research Institute of Petroleum & Petrochemicals China Petroleum & Chemical Corporation (SINOPEC) Fushun China

In-situ synthesis of nano-particles using the self-assembly of molten salt and super soluble micellae was proposed based on a phenomenon of super solubilization of molten salt in reverse micellae and its self-assembly when the concentration reached up to 95%(w/w).The mechanism of the self-assembly indicates that the self-assembly of molten salt occurs in a reverse micelle where a homogenous phase is established between 5%(w/w)of a surfactant with a VB value of less than 1 and a hydrocarbon spe- *** synthesis has some unique features,such as being free of water,highly effective deposition and narrow distribution of particle size.

关键词： molten salt self-assembly supersolubilization in-situ synthesis nanoparticle