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Modes of occurrence of arsenic in high-arsenic coal by extended X-ray absorption fine structure spectroscopy

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Chinese Science Bulletin 1998年第19期43卷 1660-1663页

作者： Fenghua Zhao Deyi Ren baoshan zheng Tiandou Hu Tao Liu China Univ Min & Technol Beijing 100083 Peoples R China Chinese Acad Sci Inst Geochem Guiyang 550002 Peoples R China Chinese Acad Sci Inst High Energy Phys Beijing 100039 Peoples R China

The concentration ranges of As and Sb in six Late Permian high-arsenic coals collected from Xingren and Xingyi, Guizhou Province are 94.1 μg·g -1-3 2 and 8 1 μg·g -1-120 μg·g -1, respectively. Based on the mineralogical analysis, no arsenic and arsenic-bearing minerals are detected in these samples and arsenic occurs in coal macerals. By extended X-ray absorption fine structure(EXAFS) spectroscopy, we have found that arsenic in these high-arsenic coal samples coordinates with oxygen; the coordination number of As with oxygen for these samples is 4 except one sample(H-9) for which the coordination number of As is 3. Therefore, arsenic in these high-arsenic coals does not occur in sulfide minerals, but occurs in arsenate or arsenite phase, and the preponderance of As is in arsenate of As 5+.

关键词： high-arsenic coal modes of occurrence synchrotron radiation EXAFS spectroscopy.

Fluorine in drinking water and urine in the urban and rural areas of northwestern China——Its determination by a fluoride ion selective electrode

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Chinese Journal Of Geochemistry 2009年第2期28卷 172-175页

作者： WANG Binbin zheng baoshan LIAN Weijuan YANG Lan HUANG Ruizhe RUAN Jianping The State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China Gansu Provincial People＇s Hospital Lanzhou 730000 China School ofStomatology Lanzhou University Stomatological Hospital Lanzhou University Lanzhou 730030 China Stomatological Hospital Xi＇an Jiaotong University Xi＇an 710000 China Department of Environmental Security Systems Chiba Institute of Science Choshi Chiba 288-0025 Japan

In this study, the author determined fluorine in drinking water and urine of residents who are divided into four age groups (5, 12, 35-44, 65-74 aged), living in Huangling City, Shaanxi Province and at 6 villages of Qin'an County, Gansu Province, ***. Some residents are living in fluorine exposure areas. A total of 929 residents (463 females and 466 males) involved in the study were selected from 7 tap water systems. Drinking water samples were collected from each area and analyzed using the fluoride ion-selective method. No positive correlation relationship was found between fluorine concentrations in urine and those in drinking water in the area where the fluorine concentrations of drinking water are within the range of 1-2 mg/L. The fluorine absorbed by resistents of different ages is different in amount. With the same concentrations of fluorine in drinking water, more fluorine would be absorbed by young residents than old residents. No difference can be seen in absorption amount of fluorine among different genders.

关键词：氟离子选择性电极饮用水中国西北地区农村地区居民生活城市尿自来水系统

Distribution and affecting factors of selenium in soil in the high-Se environment of Yutangba mini-landscape

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Chinese Science Bulletin 1999年第S2期44卷 46-48页

作者： ZHU Jianming and zheng baoshan State Key Laboratory of Environmental Geochemistry, Institute of Geochemistry, Chinese Academy of Sciences, Guiyang 550002, China State Key Laboratory of Environmental Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

SELENIUM is an indispensable trace element to human beings and normal animals but if found in excessively high dietary concentrations, it can cause poisoning. The most severe example of selenium poisoning occurred at Yutangba, a typical Se-rich area in China which is situated in the northern part of ShuangheTown about 81 km east of En’shi City of the southwestern Hubei Province and the only place in the worldwhere people suffered from selenosis. In this area selenium is present mainly in the carbonaceoussiliceous rocks and carbonaceous shales of the Upper Permian Maokou Formation 210 m north of the Yutangba area. Selenium concentrations in Se-rich carbonaceous siliceous rock samples collected byzheng and Song were estimated at 6 471 mg/kg and 8 390 mg/kg, respectively. However, Yang etal. once collected samples of stone coal in which the maximum Se concentration reached more

关键词： distribution affecting factors selenium soil Hubei.

Distribution of uranium and thorium in Irtysh River and the upriver wastewater from a rare metal mine impact on it

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Chinese Journal Of Geochemistry 2006年第B8期25卷 43-44页

作者： Shehong LI baoshan zheng Jianming ZHU Xiaoying YU State Key Lab. of Environ. Geochemistry Institute of Geochemistry Chinese Academy of Sciences Guiyang 550002 China

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金矿废水中氰化物的自然降解及其环境影响

环境科学 2000年第3期21卷 110-112页

作者：李社红郑宝山中国科学院地球化学研究所环境地球化学国家重点实验室贵阳550002

某金矿废水氰化物在尾矿坝、环保坝及河流中的自然降解规律可以用负指数方程描述 .废水进入河流 A、河流 C后浓度降低的主导因素是河水的稀释作用 .通过计算研究 ,该金矿废水氰化物基本不对国际河流 F造成影响 .控制该金矿废水对 A、C2... 详细信息

某金矿废水氰化物在尾矿坝、环保坝及河流中的自然降解规律可以用负指数方程描述 .废水进入河流 A、河流 C后浓度降低的主导因素是河水的稀释作用 .通过计算研究 ,该金矿废水氰化物基本不对国际河流 F造成影响 .控制该金矿废水对 A、C2河污染的有效途径是增加循环用水量、降低环保坝水位以便减少废水渗水量 .

关键词：金矿氰化物自然降解河流污染

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液环真空泵抽气量修正探讨及工程应用优化

化工设备与管道 2021年第5期58卷 38-42页

作者：郑宝山中国昆仑工程有限公司北京100037

分析了液环真空泵选型饱和抽气量计算的影响因素,总结形成基于抽气温度、环液温度和环液饱和蒸气压的饱和抽气量修正计算公式。结合工程案例,利用Aspen Plus模拟的方法分析了某聚合装置液环真空泵组抽气量及排气温度不达标的原因,通过... 详细信息

分析了液环真空泵选型饱和抽气量计算的影响因素,总结形成基于抽气温度、环液温度和环液饱和蒸气压的饱和抽气量修正计算公式。结合工程案例,利用Aspen Plus模拟的方法分析了某聚合装置液环真空泵组抽气量及排气温度不达标的原因,通过引入重组分乙二醇(流量3 m^(3)/h)将环液的饱和的蒸气压由73 kPa降低至5.2 kPa,排气温度50.8℃,达到设计要求。

关键词：液环真空泵饱和抽气量环液温度数值模拟

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我国烟用丝束的现状与发展

现代化工 1999年第2期19卷 38-40页

作者：郑宝山原化工部规划院

介绍了我国烟用丝束的生产和消费现状，对烟用丝束的消费进行了预测，并对其发展提出了几点看法。

关键词：烟用丝束聚丙烯二醋酸纤维滤嘴烟

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煤层气采收率的影响因素及确定方法研究

天然气工业 2005年第1期25卷 120-123页

作者：郑玉柱韩宝山煤炭科学研究总院西安分院

煤层气可采资源量是各界人士广为关注的问题,而可采资源量计算的关键是如何确定煤层气采收率。文章从煤层气采收率的影响因素入手,通过对气藏地质特征、开发技术、经济因素等因素的分析,根据各种因素及其综合作用的结果,提出了5... 详细信息

煤层气可采资源量是各界人士广为关注的问题,而可采资源量计算的关键是如何确定煤层气采收率。文章从煤层气采收率的影响因素入手,通过对气藏地质特征、开发技术、经济因素等因素的分析,根据各种因素及其综合作用的结果,提出了5种确定煤层气采收率的方法。首先可以根据解吸实验数据来计算;其次对有生产或试验井网的地方,可以通过生产数据的历史拟合来模拟计算煤层气采收率;第三可以通过物理模拟方法确定煤层气采收率或结合历史拟合来模拟计算;最后可以参考国内外有关文献资料和研究成果,通过地质等类比确定煤层气采收率。

关键词：煤层气采收率物理模拟解吸生产数据

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某金矿氰化物灾害性排放的环境影响预测

环境科学 2000年第6期21卷 69-72页

作者：李社红郑宝山中国科学院地球化学研究所环境地球化学国家重点实验室贵阳550002

某大型金矿废水氰化物对下游城市具有很强的环境敏感性 ,通过室内试验及实地监测 ,研究了氰化物在该流域的降解特性、规律及影响因素 .运用氰化物在该流域的降解规律及其水文条件 ,预测了各种灾害性排放氰化物对下游流域的环境影响程度 ... 详细信息

某大型金矿废水氰化物对下游城市具有很强的环境敏感性 ,通过室内试验及实地监测 ,研究了氰化物在该流域的降解特性、规律及影响因素 .运用氰化物在该流域的降解规律及其水文条件 ,预测了各种灾害性排放氰化物对下游流域的环境影响程度 ,并提出了相应的防治措施 .

关键词：氰化物河流污染环境预测灾害防治废水排放