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| 1 | Transportation characteristics of δ^(13)C in the plants-soil-bedrock-cave system in Chongqing karst area显示文摘Here we use an analytical method to determine δ13C in local plants and organic matter in the soils above Furong cave,Chongqing,China.We also monitored δ13C in dissolved inorganic carbon(DIC) of drip water,δ13C of active deposits under the drip waters,and the concentration of air CO2(PCO2).Based on these,we preliminarily studied the transportation characteristics of stable carbon isotope(13C) in cave system of the subtropical karst area.The average δ13C value of 27 local plant samples,which belong to 16 families,was -32‰ and the weighted δ13C for surface dry biomass was -33‰.We found that for 54 soil samples collected from 5 soil profiles,δ13C of soil organic matters was -22‰,which could be attributed to the different transportation rates of stable carbon isotopes during the decomposition of plants and organic matters in soils.The relatively lighter 12C tended to transfer into gaseous CO2,which made the relatively heavier 13C concentrated in the soils.On the basis of monitoring of DIC-δ13C in drip waters from July 2009 to June 2010,we found that values in winter months were heavier and values in summer months were lighter in general,the reason of which was that in summer months,both the temperature and the humidity were comparatively higher,resulted in more CO2 with lighter δ13C generated from organic matters decomposition and plants respiration.The average DIC -δ13C value was -11‰,about 11‰ heavier than the δ13C of organic matters in soils,which proved that part of DIC in cave drip water was sourced from dissolution of inorganic carbonate(host rock,with heavier δ13C).As for the δ13C of active deposits at five drip water sites in Furong cave,they had almost the same variation with relatively light values.In other words,these active speleothems were deposited at equilibrium conditions for isotopic fractionation.These results suggest that the carbon isotopic information of speleothems could be used to track the evolution of local vegetation in certain situations. | Li TingYong Li HongChun Xiang XiaoJing Kuo Tz-Shing Li JunYun Zhou FuLi Chen HongLi Peng LingLi | 2012 | Science China Earth Sciences2012，55，4： | 18 |
| 2 | Characteristics of the phytoplankton community and bioaccumulation of heavy metals during algal blooms in Xiangjiang River (Hunan,China)显示文摘The frequency of algal blooms has increased in the mid and downstream reaches of the Xiangjiang River (Hunan,China),one of the most heavily polluted rivers in China.We identified the bloom-forming species in a bloom that occurred mid-late September 2010.In addition,we determined the extent of metal bioaccumulation in the algae and measured the toxicity of the algae using a mouse bioassay.Water samples were collected at upstream (Yongzhou),midstream (Hengyang),and downstream (Zhuzhou,Xiangtan,and Changsha) sites.The dominant species was Aulacoseira granulata,formerly known as Melosira granulata.The heaviest bloom occurred at Xiangtan and Changsha,where the number of A.granulata peaked at 1.3×10 5 filaments L 1 and chlorophyll a at 0.04 mg L 1.Concentrations of Al,Fe,and Mn were 4.4 10 3,768.4,and 138.7 mg kg 1 dry weight in the phytoplankton.The bioaccumulation factor was 4.0×10 5,7.7×10 5,and 3.2×10 3,respectively.The heavy metal Pb had the greatest tendency to bioaccumulate among the highly toxic heavy metals,with a concentration of 19.2 mg kg 1 dry weight and bioaccumulation factor of 9.6×10 3.The mouse bioassay suggested the bloom was toxic.The LD 50 was 384 mg kg 1 and all surviving mice lost weight during the first 72 h after exposure.Our results demonstrate that blooms of A.granulata in rivers contaminated with heavy metals pose a threat to freshwater ecosystems and human health.Thus,measures should be taken to control eutrophication and heavy metal pollution in such rivers. | LI Jie PENG FuLi DING DongBo ZHANG ShuBing LI DeLiang ZHANG Ting | 2011 | Science China(Life Sciences)2011，54，10： | 6 |
| 3 | Discovery of potassium chloride in the sintering dust by chemical and physical characterization显示文摘 | Cui Peng Zhancheng Guo Fuli Zhang | | 0，，10： | 1 |
| 4 | Removal behavior of Zn,Pb,K and Na from cold bonded briquettes of metallurgical dust in simulated RHF显示文摘 | Cui Peng Fuli Zhang Huifang Li | | 0，，12： | 1 |
| 5 | Existing state of potassium chloride in agglomerated sintering dust and its water leaching kinetics 显示文摘 | Peng Cui Guo Zhancheng Zhang Fuli | 2001 | T Nonferr Metal Soc2001，21，： | 1 |
| 6 | Discovery of potassium chloride in the sintering dust by chemical and physicalcharacterization显示文摘 | Cui Peng Zhancheng Guo Fuli Zhang | 2008 | ISIJ Int2008，48，10： | 1 |
| 7 | Separation and recovery of potassium chloride from sintering dust of ironmaking works显示文摘 | Cui Peng Fuli Zhang Zhancheng Guo | 2009 | ISIJ Int2009，49，5： | 1 |
| 8 | Allicin Inhibits Microbial Growth and Oxidative Browning of Fresh-Cut Lettuce ( Lactuca sativa ) During Refrigerated Storage显示文摘 | Xiaoli Peng Ren Li Rong Zou Jun Chen Qiang Zhang Pengle Cui Fuli Chen Yu Fu Jingpeng Yang Xiaodong Xia | 2014 | Food and Bioprocess Technology2014，，6： | 1 |
| 9 | Deactivation mechanisms and anti-deactivation strategies of molecular sieve catalysts for NO_(x)reduction显示文摘Molecular sieve catalysts,owing to their unique chemical properties,are widely used as catalysts among various catalytic reactions.Abundant Br?nsted acid sites in molecular sieve catalysts usually enable active components to disperse well on the catalyst surface,and help to adsorb a large number of gas molecules to achieve maximum catalytic performance.Therefore,a variety of molecular sieve catalysts have been developed and used in the selective catalytic reduction of NO_(x)by NH_(3)(NH_(3)-SCR).For example,Cu molecular sieve catalysts such as Cu-SSZ-13 and Cu-SAPO-34 with wide temperature windows and stable structure are considered and applied as commercial catalysts for NO_(x)removal in diesel vehicles for a long time.Although molecular sieve catalysts possess many advantages,they still cannot avoid the serious deactivation caused by various factors in practical applications.In this review,reasons leading to the deactivation of molecular sieve catalysts for NO_(x)reduction in actual working conditions were concluded.The deactivation mechanisms of molecular sieve catalysts for NO_(x)reduction were analyzed and the corresponding anti-deactivation strategies were summarized.Finally,challenges and prospects of molecular sieve catalysts for NO_(x)reduction were also proposed. | Fuli Wang Penglu Wang Jin Zhang Dengchao Peng Mengmeng Wei Dengsong Zhang | 2024 | Chinese Chemical Letters2024，35，3： | 0 |
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