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Origin of the Dashuigou Independent Tellurium Deposit at the Southeastern Qinghai-Tibet Plateau:Based on the Abundances of Trace Elements in the Country Rocks

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Advances in Geological and Geotechnical Engineering Research 2023年第4期5卷 41-55页

作者： Jianzhao Yin Shoupu Xiang Haoyu Yin Hongyun Shi Yuhong Chao College of Earth Sciences Jilin UniversityChangchunJilin130061China Wuhan Institute of technology WuhanHubei430074China Silvercorp Metals Inc. Chaoyang DistrictBeijing100027China Guinea Westfield Mining Company-Sarlu JinzhongShanxi031300China Orient Resources Ltd. RichmondBCV7E 1M8Canada Ganzhongnan Institute of Geology and Mineral Exploration NanchangJiangxi330002China

Through a detailed study of the abundances and spatial-temporal distribution patterns of Te,Bi,As,Se,Cu,Pb,zn,Au,and Ag in the rock types of different geological epochs in the Dashuigou independent tellurium deposit,and in combination with other research findings of previous researchers in this area,the authors conclude as follows:Abundances of the main ore-forming elements Te,Bi,As,Se,Au,and Ag are not high in the regional geological background,generally lower or close to their respective crustal Clark values,but almost all altered country rocks contain high levels of ore-forming *** indicates that the deposit’s ore-forming elements do not come from the country *** also indicates that the geological thermal events that cause alteration and mineralization originate from depths and may be related to mantle *** the distribution pattern of these ore-forming elements in the ore bodies’hanging wall and footwall,the metallogenic mechanism may be as follows:Mineralization is not achieved through lateral secretion in the horizontal or near horizontal direction,but rather through the upward movement and emplacement of deep ore-forming elements driven by geological processes such as mantle *** addition,the migration of deep ore-forming elements is not achieved through dispersed infiltration between overlying rock particles,but through non widespread concentrated penetrating *** type of channel is likely to be the expansion structures where faults from different directions intersect,or where linear faults intersect with circular structures.

关键词： Origin of ore-forming elements The Dashuigou independent tellurium deposit Trace element abundance The country rocks The mantle plume

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Comparison and Analysis of the Major Ingredients of Different Chinese Chestnut Varieties

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Agricultural Biotechnology 2022年第6期11卷 116-118页

作者： Lei WANG Yanhua YAN Shouguo GU Liang LI Kai GE Tian LIN Ruiling ZHAO Xueliang PANG Tangshan Food and Drug Comprehensive Testing Center Tangshan 063000China Key Laboratory of Quality Evaluation and Nutrition Health of Agro-Products Ministry of Agriculture and Rural AffairsTangshan 063000China Hebei Agricultural Products Quality and Safety Testing Innovation Center Tangshan 063000 China Tangshan Institute of Industrial technology for Functional Agricultural Products Tangshan 063000China Hebei Food Inspection Laboratory Automation Engineering Research Center Tangshan 063000 China

[Objectives]This study was conducted to investigate the differences of main nutrient components in 29 different varieties of Chinese chestnut.[Methods]The protein contents,starch contents,Vc contents,soluble sugar contents and inorganic element contents in the 29 different varieties of Chinese chestnut in the north were detected and compared.[Results]The main nutrient components in the 29 varieties of Chinese chestnut were as follows:amylose content 47.16%-63.27%,protein content 3.23%-7.58%,soluble sugar content 7.23%-16.17%,Vc content 2.42-9.42 mg/100 g,Fe content 7.20-17.28 mg/kg,K content 3611-8940 mg/kg,zn content 4.43-9.24 mg/kg,Ca content 120-304 mg/kg,and P content 752-1658 mg/*** general,four varieties,"Dabanhong","Yanbao","Duanzhi"and"Jinhua",have higher nutritional components.[Conclusions]This study provides a theoretical basis for the processing,utilization,storage,purchase,breeding and scientific management of Chinese chestnut in the future.

关键词： Chinese chestnut Variety Nutritional composition Comparative analysis

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Consumption of African Indigenous Vegetables Improves Children’s body Fat Free Mass in Machakos County, Kenya

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Journal of Food Science and Engineering 2019年第8期9卷 305-317页

作者： John Wakhanu Hudson Nyambaka Judith Kimiywe Mildred Nawiri Wilson M.Thagana Kenyatta University and Department of Education Presbyterian University of East Africa P.O Box 387-00902KikuyuKenya The Department of Chemistry Kenyatta UniversityP.O Box 43844NairobiKenya The Department of Food Nutrition and DieteticsKenyatta UniversityP.O Box 43844NairobiKenya The Department of Chemistry Kenyatta University P.O Box 43844NairobiKenya The Department of Agriculture Science and TechnologyKenyatta University-Kitui CampusP.O Box 43844NairobiKenya

School gardens growing African Indigenous Leafy Vegetables(AILVs)(Amaranthus cruentus and Vigna unguiculata)were established in Kangundo and Kilalani primary schools in Machakos County,Kenya and children aged 6-10 years(Kangundo,N=66,Kilalani,N=46)that met the inclusion criteria participated as study *** were two phases,I(13 weeks)and II(12 weeks)with 4 weeks in between to enable crossover of the school as either experimental or *** were grown in gardens of the experimental *** subjects in the experimental group were fed on the AILVs recipe with an accompaniment of a mixture of cooked maize and beans once a day,5 days a week per *** control group fed only on the *** Mass Index(BMI)was determined and a prescribed dose of deuterium oxide was administered and deuterium enrichment determined by Fourier Transform Infrared Spectrometry for%Fat Free Mass(FFM)in children’s saliva at baseline and *** zn and Fe levels were analyzed by Atomic Absorption Spectroscopy at baseline and *** analysis in both phase Ⅰ and Ⅱ showed the%FFM,mean serum Fe and zn were significantly higher(p<0.001)only for the experimental ***-based intervention through vegetable garden establishments has potential to eradicate malnutrition among school-going children in ***,finding by previous studies that DDIM is more accurate in determining nutrition intervention outcomes in children than BMI is supported.

关键词： School gardens body composition vegetable recipes malnutrition

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Assessing Levels and Health Risks of Fluoride and Heavy Metal Contamination in Drinking Water

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Journal of Geoscience and Environment Protection 2022年第11期10卷 15-34页

作者： Ali Sanou Namory Méité Amadou Kouyaté Elisephane Irankunda Alfred Niamien Kouamé Aka Eric Koffi Koffi Jean-Paul Bohoussou Lébé Prisca M.-S. Kouakou Institut National Polytechnique Félix Houphouë t-Boigny (INP-HB) Laboratoire des Procédés Industriels de Synthèses de l’Environnement et des Energies Nouvelles (LAPISEN) Yamoussoukro C&#244 te d’Ivoire Institut National Polytechnique Félix Houphouë t-Boigny (INP-HB) Laboratoire de Thermodynamique Traitement et Sciences des Surfaces et Interfaces Ingénierie et Physicochimie des Procédés et de Mécanique des Matériaux (L2-TSIPM) Yamoussoukro C&#244 te d’Ivoire Ecole Normale Supérieure (ENS) Laboratoire des Sciences Physiques Fondamentales et Appliquées (LSPFA) Abidjan C&#244 te d’Ivoire Université Félix Houphouë t-Boigny (UFHB) UFR SSMT Laboratoire de Constitution et Réaction de la Matière (LCRM) Abidjan C&#244 te d’Ivoire Université Félix Houphouë t-Boigny (UFHB) UFR SSMT Laboratoire de Constitution et Réaction de la Matière (LCRM) Abidjan C&#244te d’Ivoire Laboratoire des Sciences et Technologies de l’Environnement UFR Environnement Université Jean Lorougnon Guédé Daloa C&#244 te d’Ivoire School of Computer Science and Information technology The East African University Kajiado Kenya

A systematic study was carried out to assess the level of contamination with fluorides and heavy metals in the drinking water of the city of Daloa as well as the risks to the health of consumers. The waters of 11.11% of the sites sampled exceeded the fluoride limit for drinking water with a contamination index (CI) greater than 0. All the waters recorded concentrations of cadmium (Cd), copper (Cu), iron (Fe), manganese (Mn) and lead (Pb) above the recommended values with CI > 0. However, 22.22% of the sites recorded concentrations below the standard for zinc (zn) with IC zn where the CDI > 1 for children in 22.22% of drinking water studied. HQs have an average of less than 1 for fluorine and greater than 1 for all metals. Moreover, the danger indices have values greater than 1. The incremental lifetime cancer risk (ILCR) and the total ILCR are above the recommended values. These results showed that the drinking water sampled is of poor quality due to higher levels of heavy metals, which can constitute a danger to human health. Long-term use of one of these poor quality waters can lead to cancer in consumers. It is therefore necessary to treat this water in order to eliminate the metals before using it for drinking. This study can help decision-makers and competent authorities in charge of water management.

关键词： Physico-Chemical Parameters Fluoride Heavy Metals Drinking Water Sanitary Risks

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陕西省城市土壤重金属空间分布特征与来源解析

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环境生态学 2023年第10期5卷 1-12页

作者：陈景辉马云郭毅屈撑囤西安石油大学期刊中心陕西西安710065 西安石油大学陕西省油气田环境污染控制技术与储层保护重点实验室陕西西安710065 西安石油大学石油工程学院陕西西安710065 International Laboratory of Air Quality and Health(ILAQH) Queensland University of Technology2 George StBrisbane CityQueensland4000Australia 西安石油大学化学化工学院陕西西安710065 石油石化污染物控制与处理国家重点实验室北京102206

收集整理陕西省下辖10个地级市的表层土壤9种重金属(As、Co、Cr、Cu、Mn、Ni、Pb、zn、Cd)含量、3个主要国民经济指标(GDP、人均GDP、常住人口)、8种污染物排放量(工业固废、工业废水、COD、NH 3-N、工业废气、SO_(2)、NO_(x)、烟(粉)尘... 详细信息

收集整理陕西省下辖10个地级市的表层土壤9种重金属(As、Co、Cr、Cu、Mn、Ni、Pb、zn、Cd)含量、3个主要国民经济指标(GDP、人均GDP、常住人口)、8种污染物排放量(工业固废、工业废水、COD、NH 3-N、工业废气、SO_(2)、NO_(x)、烟(粉)尘)和7个大气环境监测指标(空气质量指数AQI、PM 2.5、PM 10、SO_(2)、NO_(2)、CO、O_(3))数据。研究陕西省城市土壤重金属污染水平,利用ArcGIS软件研究各重金属元素的空间分布特征,并通过地统计学方法进行来源解析。结果表明:陕西省城市土壤重金属含量差异较大,As和Mn的最高含量出现在西安,Cr、Cu和Ni的最高含量出现在渭南,Co、Pb、zn和Cd的最高含量分别出现在榆林、铜川、宝鸡和商洛。地累积污染指数I geo的均值排序为:Cd>Co>Pb>Cu>zn=Ni>Cr>Mn>As。As与Mn、zn之间存在正相关性,Cr与Cu、Ni的相关性较好,Co、Pb和Cd与其他元素相关性不明显。Cr、Cu和Ni主要来自工业源,As、Mn和zn主要来自自然源和交通源,Co和Cd主要来自工业源和农业源,Pb主要来自工业源和交通源。

关键词：土壤重金属 ArcGIS 空间分布主成分分析来源解析

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