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| 1 | Effects of soil properties on production and bioaccumulation of methylmercury in rice paddies at a mercury mining area,China显示文摘Rice paddy soil is recognized as the hotspot of mercury(Hg) methylation, which is mainly a biotic process mediated by many abiotic factors. In this study, effects of key soil properties on the production and bioaccumulation of Hg and methylmercury(MeHg) in Hg-contaminated rice paddies were investigated. Rice and soil samples were collected from the active Hg smelting site and abandoned Hg mining sites(a total of 124 paddy fields) in the Wanshan Mercury Mine, China. Total Hg(THg) and MeHg in soils and rice grains, together with sulfur(S),selenium(Se), organic matter(OM), nitrogen(N), phosphorus(P), mineral compositions(e.g., SiO_2, Al_2O_3 and Fe_2O_3) and pH in soils were quantified. The results showed that long-term Hg mining activities had resulted in THg and MeHg contaminations in soil-rice system. The newly-deposited atmospheric Hg was more readily methylated relative to the native Hg already in soils, which could be responsible for the elevated MeHg levels in soils and rice grains around the active artificial Hg smelting site. The MeHg concentrations in soils and rice grains showed a significantly negative relationship with soil N/Hg, S/Hg and OM/Hg ratio possibly due to the formation of low-bioavailability Hg–S(N)–OM complexes in rhizosphere. The Hg–Se antagonism undoubtedly occurred in soil-rice system, while its role in bioaccumulation of MeHg in the MeHg-contaminated rice paddies was minor. However, other soil properties showed less influence on the production and bioaccumulation of MeHg in rice paddies located at the Wanshan Mercury Mine zone. | Deliang Yin Tianrong He Runsheng Yin Lingxia Zeng | 2018 | Journal of Environmental Sciences2018，30，6： | 8 |
| 2 | Distribution and speciation of mercury in the Hongfeng Reservoir,Guizhou Province, China显示文摘The water, pore water, sediment, and fish samples were collected from the Hongfeng Reservoir in No- vember 2003 and February 2004 in accordance with trace metal protocols. The average concentrations of total mer- cury (THg), dissolved mercury (DHg), reactive mercury, dissolved gaseous mercury, total methylmercury, and dis- solved methylmercury in the water columns were 8.00, 5.70, 0.63, 0.05, 0.16, and 0.07 ng/L, respectively. THg and DHg in the water columns, THg in pore water and THg in lake sediments of the Hongfeng Reservoir showed the level of mercury in the Hongfeng Reservoir was higher than in other natural waters in the world due to the loading of a lot of waste water with relatively high concentrations of mercury, whereas methylmercury concentrations in fish (wet weight) varied from 1.73–51.00 ng/g, much lower than in most remote lakes and reservoirs reported in northern Europe and North America. Methylmercury distributions in pore water and sediments showed methylation oc- curred mainly in the upper several centimeters of sediment cores in the Hongfeng Reservoir. The concentrations of dissolved organic carbon, total suspended particles, total Hg, and methylmercury were higher at Houwu than those at Daba in November 2003. It is suggested that other pollutants such as N and P from fishing farm and other waste water at Houwu,which resulted in deterioration of water quality, affected the concentrations and distributions of mercury species in the reservoir. | HE Tianrong FENG Xinbin GUO Yanna QIU Guangle YAN Haiyu MENG Bo | 2008 | Chinese Journal Of Geochemistry2008，27，1： | 5 |
| 3 | Distribution and wet deposition fluxes of total and methyl mercury in Wujiang River Basin, Guizhou, China显示文摘 | Yanna Guo Xinbin Feng Zhonggen Li Tianrong He Haiyu Yan Bo Meng Junfang Zhang Guangle Qiu | 2008 | Atmospheric Environment2008，，30： | 1 |
| 4 | Distribution and wet deposition fluxes of total and methyl mercury in Wujiang River Basin, Guizhou, China显示文摘 | Yanna Guo Xinbin Feng Zhonggen Li Tianrong He Haiyu Yan Bo Meng Junfang Zhang Guangle Qiu | 2008 | Atmospheric Environment2008，，30： | 1 |
| 5 | Spatial distribution and methylation of mercury in a eutrophic reservoir heavily contaminated by mercury in Southwest China显示文摘 | Haiyu Yan Qiuhua Li Bo Meng Cuiping Wang Xinbin Feng Tianrong He Janusz Dominik | 2013 | Applied Geochemistry2013，，： | 1 |
| 6 | The impact of sulfate reduction on the distribution of methylmercury in reservoirs in the city of Guiyang显示文摘In this paper, the relationship between sulfate reduction potential and mercury methylation potential was studied in the Aha, Baihua and Hongfeng reservoirs from Guiyang City. The methylmercury (MeHg) concentrations of lake water in the Aha Reservoir were greatly elevated as compared to those of the Hongfeng and Baihua reservoirs, which was correlated with its distinctly high SRB abundance, SO42-, and S2- concentrations. Among the three reservoirs, however, the highest MeHg was observed in in the top several centimenters of pore water profile in the Hongfeng Reservoir where the lowest S2- in pore water occurred. The distributions of MeHg in lake water and pore water showed the highest methylation potential occurred at water-sediment surface for the Aha Reservoir and the in the top several centimenters of sediments for the Hongfeng Reservoir. It is guessed that the highest mercury methylation only occurs at the sites with certain sulfide concentrations. | HE Tianrong LI Ting Yang Ruidong LUO Guangjun LANG Xiaofang An Yanling YAN Haiyu | 2013 | Chinese Journal Of Geochemistry2013，32，1： | 1 |
| 7 | Effects of sulfate-reducing bacteria on methylmercury at the sediment–water interface显示文摘Sediment cores(containing sediment and overlying water) from Baihua Reservoir(SW China)were cultured under different redox conditions with different microbial activities, to understand the effects of sulfate-reducing bacteria(SRB) on mercury(Hg) methylation at sediment–water interfaces. Concentrations of dissolved methyl mercury(DMe Hg) in the overlying water of the control cores with bioactivity maintained(BAC) and cores with only sulfate-reducing bacteria inhibited(SRBI) and bacteria fully inhibited(BACI) were measured at the anaerobic stage followed by the aerobic stage. For the BAC and SRBI cores, DMe Hg concentrations in waters were much higher at the anaerobic stage than those at the aerobic stage, and they were negatively correlated to the dissolved oxygen concentrations(r =- 0.5311 and r =- 0.4977 for BAC and SRBI, respectively). The water DMe Hg concentrations of the SRBI cores were 50% lower than those of the BAC cores, indicating that the SRB is of great importance in Hg methylation in sediment–water systems, but there should be other microbes such as iron-reducing bacteria and those containing specific gene cluster(hgc AB), besides SRB,causing Hg methylation in the sediment–water system. | Lingxia Zeng Guangjun Luo Tianrong He Yanna Guo Xiaoli Qian | 2016 | Journal of Environmental Sciences2016，28，8： | 1 |
| 8 | The impact of eutrophication on the biogeochemical cycling of mercury species in a reservoir: a case study from Hongfeng Reservoir, Guizhou, China 显示文摘 | HE Tianrong FENG Xinbin GUO Yanna | 2008 | Environment Pollution2008，154，： | 1 |
| 9 | Mercury speciation and distribution in Aha Reservoir which was contaminated by coal mining activities in Guiyang, Guizhou, China显示文摘 | Xinbin Feng Weiyang Bai Lihai Shang Tianrong He Guangle Qiu Haiyu Yan | 2010 | Applied Geochemistry2010，，2： | 1 |
| 10 | The concentration and distribution of different mercury species in the water columns and sediment of Aha Lake显示文摘 | Weiyang BAI Xinbin FENG Xuewu FU Tianrong HE Guangle QIU | 2006 | Chinese Journal Of Geochemistry2006，25，B08： | 0 |
| 11 | Elevated methylmercury production in mercury-contaminated soil and its bioaccumulation in rice:key roles of algal decomposition显示文摘Algal-derived organic matter(AOM)regulates methylmercury(MeHg)fate in aquatic ecosystems,whereas its role in MeHg production and bioaccumulation in Hg-contaminated paddies is unclear.Pot and microcosm experiments were thus performed to understand the response characteristics of MeHg concentrations in soil and rice in different rice-growing periods to algal decomposition.Compared to the control,algal decomposition significantly increased soil water-soluble cysteine concentrations during the rice-tillering and grain-filling periods(P<0.05).It also significantly lowered the molecular weight of soil-dissolved organic matter(SDOM)during the rice-tillering period(P<0.05)and SDOM humification/aromaticity during the grain-filling period.Compared to the control,AOM input increased the abundance of potential Hg and non-Hg methylators in soil.Furthermore,it also greatly increased soil MeHg concentrations by 25.6%-80.2%and 12.6%-66.1%during the rice-tillering and grain-filling periods,with an average of 42.25%and 38.42%,respectively,which were significantly related to the elevated cysteine in soil and the decrease in SDOM molecular weight(P<0.01).In the early stage(within 10 days of microcosm experiments),the MeHg concentrations in decayed algal particles showed a great decrease(P<0.01),suggesting a potential MeHg source in soil.Ultimately,algal decomposition greatly increased the MeHg concentrations and bioaccumulation factors in rice grains,by 72.30%and 16.77%,respectively.Overall,algal decomposition in Hg-contaminated paddies is a non-negligible factor promoting MeHg accumulation in soil-rice systems. | Di Liu Yan Wang Tianrong He Deliang Yin Shouyang He Xian Zhou Yiyuan Xu Enxin Liu | 2023 | Frontiers of Environmental Science & Engineering2023，17，12： | 0 |
| 12 | Enrichment characteristics and risk assessment of Hg in bird feathers from Caohai wetland in Guizhou Province,China显示文摘Based on the analysis of the enrichment characteristics of Hg and Me Hg in bird feathers from Caohai National Nature Reserve in Guizhou, the risks of Hg pollution to the birds from Caohai wetland have been evaluated. The total Hg content of bird feathers ranges from 40 to 5058 ng/g with an average of 924 ng/g. The content of Me Hg is significantly correlated with total Hg(r = 0.68,p<0.01), and the content are among 0.75 and 113 ng/g.The total Hg content in the birds feathers is significantly dependent on their feeding habits, which is mainly in accordance with the following rule: carnivorous birds [ omnivorous birds that are mainly carnivorous [ omnivorous birds that are mainly herbivorous.There are also differences in the Hg enrichment ability in the different parts of bird feathers, and the total Hg and Me Hg content in the wing feathers are significantly higher than that in the other parts of feathers. The bioaccumulation coefficients of aqueous Hg and Me Hg by bird feathers are 0.9×10~4–112.13×10~4(mean value is 20.47×10~4) and 0.47×10~4–70.4×10~4(mean value is 9.52×10~4),respectively. Although the whole Hg level in Caohai bird feathers is not too high, the Hg content in some carnivorous birds exceeds over or approaches the abnormal threshold when birds are breeding(5 μg/g), which indicates that the birds in Caohai wetland are faced with some risks of ecological Hg pollution. | Fengcheng Peng Tianrong He Zhenji Li Mengyu Chen Xiaoli Qian Lingxia Zeng Yiyuan Xu | 2018 | Acta Geochimica2018，37，4： | 0 |
| 13 | Effects of fulvic acid and humic acid from different sources on Hg methylation in soil and accumulation in rice显示文摘Humus is often used as an organic modifier to reduce the bioaccumulation of heavy metals in plants, but the effects of different humus components from different sources on the fate of mercury(Hg) in paddy fields are still unclear. Here, fulvic acid(FA) and humic acid(HA) extracted from composted straw(CS), composted cow dung(CCD), peat soil(PM) and lignite coal(LC) were used to understand their effects on the methylation and bioaccumulation of Hg in paddy soil by pot experiments. Amendments of both FA and HA largely increased the abundance of Hg-methylating microbes and low-molecular-weight organic matters(e.g, cysteine) in paddy soil. They were also found to change the aromaticity, molecular size and Chromophoric DOM concentration of DOM, and resulted in heterogeneous effects on migration and transformation of Hg. All the FA-amended treatments increased the mobility and methylation of Hg in soil and its absorption in roots. Nevertheless, FA from different sources have heterogeneous effects on transport of Hg between rice tissues. FA-CCD and FA-PM promoted the translocation of Me Hg from roots to rice grains by 32.95% and 41.12%, while FA-CS and FA-LC significantly inhibited the translocation of inorganic Hg(IHg) by 52.65% and 66.06% and of Me Hg by 46.65% and 36.23%, respectively. In contrast, all HA-amended treatments reduced the mobility of soil Hg, but promoted Hg methylation in soil. Among which, HA-CCD and HA-PM promoted the translocation of Me Hg in rice tissues by 88.95% and 64.10%, while its accumulation in rice grains by 28.43% and 28.69%, respectively. In general, the application of some FA and HA as organic modifiers to reduce Hg bioaccumulation in rice is not feasible. | Shu Ran Tianrong He Xian Zhou Deliang Yin | 2022 | Journal of Environmental Sciences2022，34，9： | 0 |
| 14 | Feasibility of feeding cadmium accumulator maize(Zea mays L.)to beef cattle:Discovering a strategy for eliminating phytoremediation residues显示文摘Eco-friendly and efficient strategies for eliminating cadmium(Cd)phytoremediation plant residues are needed.The present study investigated the feasibility of feeding Cd accumulator maize to beef cattle.In total,20 cattle at 6 months of age were selected and randomly allocated into two groups fed with 85.82%(fresh basis)Cd accumulator maize(CAM)or normal maize(control[Con])silage diets for 107 d.Feeding CAM did not affect the body weight(P=0.24),while it decreased feed intake and increased feed efficiency of beef cattle(P<0.01).Feeding CAM increased serum concentrations of immunoglobulin A and G,complement 3 and 4,blood urea nitrogen,and low-density lipoprotein cholesterol,decreased serum concentrations of interleukin-6 and lipopolysaccharide(P<0.05),and caused wider lumens in the renal tubules.The Cd residue in meat was 7 mg/kg beyond the restriction for human food.In the muscle,the unsaturated fatty acids(t11C18:1 and C20:4),Lys,Arg,Pro,and Cys were decreased,while the saturated fatty acids(C10:0,C12:0,and C17:0)and Leu were increased(P<0.05).Therefore,at the current feeding level,phytoremediation maize increased the feed efficiency of beef cattle,but did present risks to cattle health and production safety,and decreased the meat nutrition and flavor.Further research must be performed to determine whether a lower proper dose of phytoremediation maize and an appropriate feeding period may be possible to ensure no risk to cattle health and the supply of safe meat for humans. | Zebang Xu Bin Yang Kangle Yi Tianrong Chen Xinxin Xu Ao Sun Haobang Li Jianbo Li Fang He Cheng Huan Yang Luo Jiakun Wang | 2023 | Animal Nutrition2023，，4： | 0 |
| 15 | Application of Induced Pluripotent Stem Cells Derived from Human Periodontal Ligament Cells in Bone Regeneration显示文摘The purpose of this study was to primarily culture human periodontal ligament cells(hPDLCs)and to reprogram hPDLCs with exogenous genes via a lentivirus-mediated transfection system.Then induced pluripotent stem cells derived from h PDLCs(hPDLC-iPSCs)were identified.Alizarin red staining was used to observe the formation of mineralized nodules and real-time Polymerase Chain Reaction(PCR)was used to detect the expression of osteogenic genes.For the in vivo experiment,nude mouse skull defect models were established and cell sheets were made to repair the bone defect.The reprogrammed cells were positive for alkaline phosphatase(ALP)staining and embryonic stem cells(ESCs)-specific proteins,and could form teratomas.After osteogenic induction,alizarin red staining showed that the number of mineralized nodules in the h PDLC-i PSCs group was more and the osteogenic related factors ALP,osteocalcin(OCN),Col-I and Runx2 were also expressed higher in hPDLC-iPSCs.The hPDLC-iPSC cell sheets were all successfully made.Histological analysis showed that the h PDLC-i PSC cell sheet got new bone formation.These results demonstrated that hPDLC-iPSCs were successfully generated from human periodontal ligament fibroblasts and hPDLC-iPSC cell sheets provided new options for bone tissue engineering. | HE Tianrong YAN Qi WU Xinyu SHI Bin LIN Yi | 2020 | Wuhan University Journal of Natural Sciences2020，25，5： | 0 |
| 16 | Spatial and temporal distributions of mercury species and controlling factors in Hongfeng Reservoir, Guizhou, China显示文摘 | Tianrong HE Xinbin FENG Guangle QIU Weiyang BAI Zhonggen LI Julia LU | 2006 | Chinese Journal Of Geochemistry2006，25，B08： | 0 |
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