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Effects of soil properties on production and bioaccumulation of methylmercury in rice paddies at a mercury mining area,China

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Journal of Environmental Sciences 2018年第6期30卷 194-205页

作者： Deliang yin Tianrong He runsheng yin Lingxia Zeng The Key Laboratory of Karst Environment and Geohazard Prevention Guizhou University Guiyang 550003 China College of Resources and Environments Southwest University Chongqing 400715 China State Key Laboratory of Ore Deposit Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Department of Civil and Environmental Engineering Environmental Chemistry and Technology Program University of Wisconsin-Madison Madison WI 53706 USA

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., SiO2, Al2O3 and Fe2O3） 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.

关键词： Rice paddy Physicochemical property Mercury mining area Mercury Methylmercury Bioaccumulation factors

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Mercury isotope constraints on the genesis of late Mesozoic Sb deposits in South China

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Science China Earth Sciences 2022年第2期65卷 269-281页

作者： Changzhou DENG Jiawei ZHANG Ruizhong HU Kai LUO Yanan ZHU runsheng yin State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Guizhou Geological Survey Bureau of Geology and Mineral Exploration and Development of Guizhou ProvinceGuiyang 550081China Technology Innovation Center of Mineral Resources Exploration Engineering in Bedrock Zone Ministry of Natural ResourcesGuiyang 550081China College of Resources and Environmental Engineering Guizhou UniversityGuiyang 550025China School of Earth Sciences Yunnan UniversityKunming 650500China

The late Mesozoic antimony(Sb)mineralization belt in South China hosts a large portion of the world’s Sb ***,the source and mineralization processes of these Sb deposits remain ***,we measured mercury(Hg)concentrations and isotopic compositions of stibnite in the Banpo Sb-only and Woxi Sbpolymetallic ore deposits,as well as associated rocks in the Yangtze Block in order to constrain the metal sources and ore formation processes in the South China Sb mineralization *** samples from both deposits exhibit significant enrichment in Hg(4.23–50.6 ppm)and have higher δ^(202)Hg values(−0.47‰to 2.03‰)than the studied Precambrian basement rocks(−1.42‰to 0.59‰),Paleozoic sedimentary rocks(−2.40‰to−0.32‰),and other natural Hg reserves(e.g.,marine and continental systems).This indicates that significant mass-dependent fractionation of Hg isotopes occurred during hydrothermal *** to slightly positive Δ^(199)Hg values of−0.17‰to 0.02‰were obtained for stibnite from the studied deposits,similar to values for the Precambrian basement rocks,but different from those of the Paleozoic sedimentary rocks and data previously reported for mantle *** suggests that Precambrian basement rocks were the source of Hg and associated *** data and the tectonic evolution of South China indicate that late Mesozoic asthenospheric upwelling,in response to the Paleo-Pacific oceanic slab foundering,generated heat that drove the circulation of fluids in the basement and crustal basinal *** fluids leached Sb,Hg,and other metals from the Precambrian basement rocks and formed the world-class Sb mineralization belt in South China.

关键词： Hg isotopes Mass-independent fractionation Sb deposits Metamorphic basement South China

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Mercury isotope variations in surface soils in different contaminated areas in Guizhou Province,China

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Chinese Science Bulletin 2013年第2期58卷 249-255页

作者： FENG XinBin yin runsheng YU Ben DU BuYun State Key Laboratory of Environmental Geochemistry Institute of GeochemistryChinese Academy of Sciences State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of Sciences Graduate University of the Chinese Academy of Sciences

Guizhou Province is known as a heavily Hg-polluted area in China due to its special geochemical background and complicated Hg emission *** this study,we investigated the Hg isotope compositions of surface soil samples in the Hg mining area,zinc smelting area,coal combustion area,which are known to be the typical pollution regions of Hg in this *** also compared the Hg isotopic fingerprints of primary Hg sources,such as hydrothermal Hg-bearing ores,coals and atmospheric Hg *** to our study,Hg stored in surface soils in different pollution regions in Guizhou Province displays a wide range of both mass dependent fractionation(MDF,δ202Hg) and mass independent fractionation(MIF,△199Hg).δ 202 Hg varies by 2.0‰ and △199Hg varies by 0.25‰ in the investigated surface *** study demonstrated that using a "MDF-MIF" two dimensional Hg isotope system could be particularly useful in discriminating Hg sources in soils.

关键词：汞同位素表层土壤污染地区贵州省中国地球化学背景土壤样品同位素组成

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Multiple metal sources in polymetallic W-Sn ore deposits revealed by mercury stable isotopes

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Science China Earth Sciences 2024年第11期67卷 3465-3475页

作者： Zhendong TIAN Bernd LEHMANN Changzhou DENG Xingchun ZHANG Anbo LUO yinghua CHEN runsheng yin State Key Laboratory of Ore Deposit Geochemistry Institute of GeochemistryChinese Academy of SciencesGuiyang 550081China Mineral Resources Technical University of ClausthalClausthal-Zellerfeld 38678Germany Faculty of Land Resource Engineering Kunming University of Science and TechnologyKunming 650093China

Granite-related W-Sn ore systems are commonly associated with coeval Pb-Zn mineralization. It remains unclear whether these metals are derived from the same sources or not. Mercury(Hg) is a common minor component in such systems. Hg isotopes undergo unique mass-independent fractionation(expressed as Δ^(199)Hg values), which is mainly generated during Hg photochemical reactions on Earth's surface and not affected by magmatic-hydrothermal processes, offering an excellent opportunity to trace metal sources in hydrothermal systems. We observed near-zero Δ^(199)Hg values in wolframite(-0.10‰ to0.08‰, n=11), and in skarn-(-0.17‰ to 0.12‰, n=48) and greisen-type(-0.12‰ to 0.10‰, n=11) bulk tin-tungsten ore from eight major ore deposits in South China. These values are identical to those of coeval highly evolved granites(-0.13‰ to 0.12‰,n=49), supporting that Hg in W-Sn ores were sourced from granite. However, sulfides(e.g., pyrite, chalcopyrite, arsenopyrite,galena, and sphalerite) in these deposits exhibit negative to near-zero Δ^(199)Hg values(-0.42‰ to 0.09‰, n=124), which indicates a contribution of Hg and by inference other metals from both Precambrian basement rocks(Δ^(199)Hg<0) and ore-related *** study demonstrates that multiple sources of metals were involved in the formation of the polymetallic W-Sn deposits, and further highlights that extraction of metals from basement rocks may be a critical control on the formation of economically important mineralization of base metal sulfides(e.g., Pb, Zn) in granite-related magmatic-hydrothermal systems.

关键词： Tin-tungsten deposit Mercury isotope Metal source Metal zonation South China

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High-precision measurement of mercury isotope ratios of atmospheric deposition over the past 150 years recorded in a peat core taken from Hongyuan, Sichuan Province, China

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Chinese Science Bulletin 2011年第9期56卷 877-882页

作者： SHI WenFang FENG XinBin ZHANG Gan MING LiLi yin runsheng ZHAO ZhiQi WANG Jing The State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Graduate University of Chinese Academy of Sciences Beijing 100049 China The State Key Laboratory of Organic Geochemistry Guangzhou Institute of Geochemistry Chinese Academy of Sciences Guangzhou 510640 China

High-precision 210Pb dating technology was applied to a peat core with a time span of about 150 years that was taken from Hongyuan, Sichuan Province, China. The concentrations of total mercury (Hg) and stable isotope compositions of mercury in the peat core were measured using a LUMEX 915 instrument and multi-collector inductively coupled plasma mass spectrometer, respectively. Total mercury (Hg) concentrations in the peat core had a clearly increasing trend from the bottom to top of the core while δ 202Hg values (relative to NIST 3133) of peat had a decreasing trend. The total mercury (Hg) concentration varied from 16.7 to 101.3 ng/g and the δ 202Hg values ranged from –0.44‰± 0.14‰ to –1.45‰± 0.22‰. We clearly show that the study area experienced mercury pollution after the industrial revolution, and the mercury emitted from natural sources and anthropogenic sources had different Hg isotope signatures.

关键词：泥炭记录高精度测量大气汞四川省同位素比值电感耦合等离子体质谱仪中国沉降

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Characterization of ZnO Based Varistor Derived from Nano ZnO Powders and Ultrafine Dopants

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Journal of Materials Science & Technology 2005年第2期21卷 183-186页

作者： Weizhong YANG, Dali ZHOU, Guangfu yin, runsheng WANG and Yun ZHANG College of Material Science and Engineering, Sichuan University, Chengdu 610064, China Coll. of Mat. Sci. and Eng. Sichuan Univ. Chengdu 610064 China

Nanosized ZnO powders were prepared with a two-step precipitation method. The average size of ZnO particles was about 80 nm and their size distribution was narrow. Combining with ultrafine additive powders, ZnO base varistor was produced via an oxide mixing route. ZnO varistor derived from normal reagent grade starting materials was investigated for comparison purpose. Outstanding microstructure of the ZnO varistor derived from nanosize ZnO powders and ultrafine dopants was obtained: uniform distribution of fine ZnO grains (less than 3 microns), grain boundary and the dopant position. Higher varistor voltage (U=492 V/mm) and nonlinear coefficient (α=56.2) as well as lower leakage current (TL=1.5 μuA) were achieved. The better electrical properties were attributed to the uniform microstructure, which in turn led to stable and uniform potential barriers. Also this improved technique is more feasible for producing ZnO nanopowders and resulting varistor in large scales.

关键词： Zinc oxide (ZnO) Varistor Nanopowders Ultrafine dopants Two-step precipitation

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DEM栅格分辨率和子流域划分对杏子河流域水文模拟的影响

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生态学报 2012年第12期32卷 3754-3763页

作者：邱临静郑粉莉 yin runsheng 西北农林科技大学林学院杨凌712100 中国科学院水利部水土保持研究所黄土高原土壤侵蚀与旱地农业国家重点实验室杨凌712100 Department of Forestry Michigan State University

以黄土丘陵沟壑区杏子河流域为研究区,采用数字滤波法分割了杏子河招安水文站1958—1974年的基流量,评价了SWAT模型在该流域水文模拟的适用性,并分析了DEM栅格分辨率和子流域划分对SWAT水文模拟的影响。结果表明,SWAT模型适用于该流域... 详细信息

以黄土丘陵沟壑区杏子河流域为研究区,采用数字滤波法分割了杏子河招安水文站1958—1974年的基流量,评价了SWAT模型在该流域水文模拟的适用性,并分析了DEM栅格分辨率和子流域划分对SWAT水文模拟的影响。结果表明,SWAT模型适用于该流域年河川径流、地表径流、基流及产沙量的模拟。当DEM栅格分辨率在20—150 m之间时,SWAT能有效地模拟年河川径流、地表径流、基流及产沙量,各水文要素模拟结果的R2和NSE分别在0.93和0.51以上,RSR在0.43以下;而当栅格分辨率大于150 m时,各水文要素的模拟效果存在差异。子流域划分对流域产流模拟影响较小,而对产沙模拟影响较大。当子流域提取阈值在12—100 km2之间时,不同的子流域划分对产沙量几乎没有影响,若超出该阈值范围,模型会低估产沙量。因此,可针对不同的水文要素选择合适的DEM和子流域提取阈值,以提高模拟精度和运行效率。

关键词：杏子河流域 DEM栅格分辨率子流域划分水文模拟 SWAT模型

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全球木质林产品贸易网络演化与供需大国关系

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资源科学 2021年第5期43卷 1008-1024页

作者：王芳田明华尹润生印中华张振宇北京林业大学经济管理学院北京100083 美国密歇根州立大学林业系美国东兰辛48824 山西农业大学农业经济管理学院大原030006

为揭示全球木质林产品贸易网络的演化特征与演变轨迹,掌握中国在全球木质林产品贸易网络中的地位变化及供需安全性,本文基于1993—2018年全球木质林产品贸易数据构建有向加权复杂网络模型,主要对全球木质林产品贸易网络的整体演化、节... 详细信息

为揭示全球木质林产品贸易网络的演化特征与演变轨迹,掌握中国在全球木质林产品贸易网络中的地位变化及供需安全性,本文基于1993—2018年全球木质林产品贸易数据构建有向加权复杂网络模型,主要对全球木质林产品贸易网络的整体演化、节点中心性演化、集团演化、供需大国竞合关系及中国木质林产品贸易的供需安全展开实证分析。结果表明:(1)全球木质林产品贸易关系不断趋于复杂化,贸易网络的连通性整体上增强,且表现出典型的小世界特性,是"点对点"的贸易模式;北美洲贸易地位下降,亚洲、大洋洲、南美洲贸易地位上升,欧洲仍然是木质林产品进出口贸易的重心;中国与荷兰、法国、美国共同掌握着木质林产品贸易网络的信息与资源,是贸易网络的关键枢纽,起着重要的桥梁作用;(2)全球木质林产品贸易网络存在4大集团,各集团间出现了交织与重叠的现象,表现出相互融合的迹象;区域经济合作组织是贸易集团演化的重要原因;(3)中国、美国与加拿大,德国、意大利与法国,荷兰与比利时,荷兰与德国,比利时与法国,德国与波兰彼此为重要的贸易合作伙伴,中国与美国、巴西分别在日本、美国市场存在竞争,加拿大、美国与巴西在中国市场存在竞争,德国、英国、意大利和法国市场是G1的主要争夺对象;中国、俄罗斯、巴西、意大利、荷兰、美国、芬兰是联系集团内外部木质林产品贸易的关键枢纽;(4)防范目标性中断对于保障中国木质林产品的供需安全至关重要。本文对中国木质林产品贸易发展、木材产业安全及贸易政策制定都具有十分重要的意义。

关键词：木质林产品全球贸易网络节点中心性演化贸易集团演化竞合关系供需安全双循环

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黄河中上游部分地区土地覆盖动态变化研究

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干旱区资源与环境 2009年第11期23卷 47-52页

作者：王武魁尹润生齐家国北京林业大学经济管理学院北京100083 密歇根州立大学林业系美国48824 密歇根州立大学地理系全球变化和地球观测中心美国48823

作为美国国家科学基金项目"中国生态恢复综合影响评价"的部分研究结果,对项目选定的四个评价区之一的黄河中上游地区的研究区域进行土地利用和覆盖变化研究,并以此评价退耕还林效果。利用覆盖研究区域的卫星遥感图像进行解译,以便获取... 详细信息

作为美国国家科学基金项目"中国生态恢复综合影响评价"的部分研究结果,对项目选定的四个评价区之一的黄河中上游地区的研究区域进行土地利用和覆盖变化研究,并以此评价退耕还林效果。利用覆盖研究区域的卫星遥感图像进行解译,以便获取研究区域土地利用和土地覆盖变化(LUCC)的历史数据,特别是大于25度坡度的LUCC以及退耕前后的LUCC数据,通过这些解译数据评价研究区域的退耕还林效果。解译后的数据显示退耕还林效果良好。选定24景跨20年(1978年至2007年)的Landsat遥感卫星图像数据,通过解译追踪研究区域LUCC历史演变,来判断退耕还林的执行效果。

关键词：退耕还林土地覆盖变化 Landsat MSS/TM/ETM 生态恢复

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扬子克拉通前寒武纪基底对中生代大面积低温成矿的制约

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地学前缘 2020年第2期27卷 137-150页

作者：胡瑞忠陈伟毕献武付山岭尹润生肖加飞中国科学院地球化学研究所矿床地球化学国家重点实验室贵州贵阳550002 中国科学院大学地球与行星科学学院北京100049

大面积低温成矿主要见于扬子克拉通和美国中西部,且扬子克拉通比美国中西部具有更多的矿床类型,在全球极具特色,是建立大面积低温成矿理论的理想区域。前人对扬子克拉通中生代大面积低温矿作用进行了较系统的研究,在矿床地质特征、矿床... 详细信息

大面积低温成矿主要见于扬子克拉通和美国中西部,且扬子克拉通比美国中西部具有更多的矿床类型,在全球极具特色,是建立大面积低温成矿理论的理想区域。前人对扬子克拉通中生代大面积低温矿作用进行了较系统的研究,在矿床地质特征、矿床物质组成、成矿流体特征、成矿时代和成矿动力学背景等方面,已取得重要进展。进一步的研究表明,扬子低温成矿域不同矿种的矿床组合(Pb-Zn、Au-Hg-Sb-As、Au-Sb等)在地理位置上是分区产出的,而这种不同矿床组合的分区对应着不同类型的前寒武纪基底。初步证据显示,扬子克拉通前寒武纪基底(含寒武纪)富含低温成矿元素,深循环流体浸取基底岩石中的成矿元素发生了大面积低温成矿,而基底岩石成矿元素组成的空间不均一分布则控制了不同区域矿床组合的差异。应指出的是,由于成矿金属元素来源示踪的复杂性,大面积低温成矿的物质基础尚需更系统的研究进一步证实。

关键词：扬子克拉通前寒武纪基底中生代大面积低温成矿成矿金属元素来源

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