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Microplastic pollution in Yellow River,China:Current status and research progress of biotoxicological effects

China Geology 2021年第4期4卷 585-592页

作者： Rui-ping Liu Zhi-zhong Li Fei Liu Ying Dong Jian-gang Jiao Ping-ping Sun El-Wardany RM Xi’an Center China Geological SurveyMinistry of Natural ResourcesXi’an 710054China Western Green Development Research Institute ChinaGeological SurveyXi’an 710054China Key Laboratory for Geo-hazards in Loess area Ministry of Natural ResourcesXi’an 710054China field base of scientific observation of shannxi tongguan Ministry of Natural ResourcesXi’an 710054China Dalian Ocean and Fishery Comprehensive Administration Enforcement Team Dalian 116000China School of Earth Science and Land Resources of Chang’an University Xi’an 710054China Al-Azhar University Assiut 71524Egypt

This study aims to comprehensively assess the environmental risks of microplastics in the Yellow River,achieving the following results through comprehensive *** average microplastic abundances in the river waters and sediments are 5358-654000 n/m3 and 43.57-615 items/kg,respectively,and there are fewer microplastics in water samples than in *** in the study area can be divided into five types according to their occurrence morphologies,namely fragments,foams,films,fibers,and *** most widely distributed pollution types in sediments include debris,fibers,and *** contrast,fibers are the dominant type in water samples,accounting for 68.18%‒98.93%.The chemical components of the microplastics include polyethylene,polypropylene,polystyrene,polyethylene terephthalate,and polyvinyl *** microplastics are in four colors,with white accounting for a higher *** grain size of the microplastics in tributaries or lakes of the Yellow River is less than 2 mm,which makes them liable to enter organisms for ***,the sources of the microplastics are closely related to agricultural and industrial production and biological activities in habitats and exhibit seasonal and hydrological *** microplastics in the study area show the adsorption of metals and nonmetals to different degrees,which increases the pollution risks of heavy metals combined with *** addition,microplastics can accumulate in organisms in the Yellow River and cause physical,biochemical,and other damage to aquatic organisms,thus further posing carcinogenic risks to human ***,it is necessary to study,monitor,and control the pollution and effects of microplastics in the Yellow River,in order to provide theoretical references for the control of pollution and ecological risk of microplastics in the river.

关键词： Microplastic pollution Influence factor Biotoxicological effects Hydrogeological engineering Ecological engineering Yellow River China

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Effects of heavy metal pollution on farmland soils and crops:A case study of the Xiaoqinling Gold Belt,China

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China Geology 2020年第3期3卷 402-410页

作者： Rui-ping Liu You-ning Xu Jiang-hua Zhang Wen-ke Wang Rafaey M Elwardany Xi’an center China Geological SurveyMinistry of Natural ResourcesXi’an 710054China Key Laboratory of Subsurface Hydrology and Ecological Effect in Arid Region of Ministry of Education Xi’an 710054China Key Laboratory for Geo-azards in Loess Area Ministry of Natural ResourcesXi’an 710054China field base of scientific observation of shannxi tongguan Ministry of Natural ResourcesXi’an 710054China School of Environmental Science&Engineering of Chang’an University Xi’an 710054China School of Earth Science and Land Resources of Chang’an University Xi’an 710054China Faculty of Science Al-Azhar UniversityAssiut 71524Egypt

This paper focuses on the heavy metal enrichment and heavy metal pollution degree associated with mining activities in some crops and the soils of different parent materials in the Xiaoqinling Gold *** to the geochemical analysis results of the soils observed in the gold belt,the soils are most highly enriched in Pb,followed by Cr,Cu,and ***,they are relatively poor in Hg,Cd,and *** is also shown that the heavy metals in all kinds of soils have the same geochemical characteristics in the gold *** for the crops(such as corn and wheat)in the gold belt,Zn and Cu are the most abundant elements,followed by Pb and ***,Hg,Cd,and As were found to have relatively low concentrations in the *** heavy metals in wheat and corn have the same geochemical characteristics in the gold belt in *** to the aeolian loess soils and the crops therein,heavy metals are more enriched in diluvial and alluvial soils and the crops *** shown by relevant studies,the Hg,Pb,Cd,Cu,and Zn pollution are mainly caused by mining *** and wheat in the gold belt have a high tendency of risk exposure to heavy metal pollution since they are mostly affected by mining activities and feature high background values of heavy metal ***,wheat is more liable to be enriched in heavy metals than corn is grown in all types of *** Hg pollution in soils leads to Hg accumulation,increasing the risk of Hg uptake in crops,and further affecting human *** study will provide a scientific basis for the control and management of heavy metals in farmland soils of mining areas.

关键词： Heavy metal pollution Crops Farmland Environmental investigation engineering of soil Xiaoqinling Gold Belt China

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Microplastic pollution in surface water and sediments of Qinghai-Tibet Plateau: Current status and causes

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China Geology 2021年第1期4卷 178-184页

作者： Rui-ping Liu Ying Dong Guo-cang Quan Hua Zhu You-ning Xua Rafaey M.Elwardany Xi’an center China Geological SurveyMinistry of Natural ResourcesXi’an 710054China Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region Ministry of EducationXi’an 710054China Key Laboratory for Geo-hazards in Loess Area Ministry of Natural ResourcesXi’an 710054China field base of scientific observation of shannxi tongguan Ministry of Natural ResourcesXi’an 710054China Institute of Hydrogeology Engineering Geology and Environment Geology Survey of Qinghai ProvinceXining 810008China School of Earth Science and Land Resources of Chang’an University Xi’an 710054China Faculty of Science Al-Azhar UniversityAssiut 71524Egypt

To study the current status and causes of the microplastic pollution in surface water of the Qinghai-Tibet Plateau,this paper compared the average microplastic abundance in sediments and surface water of the Qinghai-Tibet Plateau and the results are as ***,the average microplastic abundance in surface water of the independent rivers and the whole area is 247−2686 items/m^(3) and 856 items/m^(3),*** average microplastic abundance in sediments of independent rivers or lakes and the whole area is 0−933 items/m^(2) and 362 items/m^(2),***,the degree of microplastic pollution in river sediments is higher than that in lake sediments,and the rivers suffering from microplastic pollution mainly include the Brahmaputra River,Tongtian River,and Nujiang ***,compared with the microplastic pollution in other areas of the world,the levelof microplastic pollution in the lakes and rivers of the Qinghai-Tibet plateau is not lower than that of well-developed areas with more intensive human ***,this study suggests that relevant government departments of the Qinghai-Tibet Plateau should strengthen waste management strategies while developing tourism and that much attention should be paid to the impacts of microplastics in the water environment.

关键词： Microplastic pollution Microplastic abundance Surface water River sediment Water environment Human activities Qinghai-Tibet Plateau China

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Current situation and human health risk assessment of fluoride enrichment in groundwater in the Loess Plateau:A case study of Dali County,Shaanxi Province,China

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China Geology 2021年第3期4卷 487-497页

作者： Rui-ping Liu Hua Zhu Fei Liu Ying Dong Refaey M El-Wardany Xi’an Center China Geological SurveyMinistry of Natural ResourcesXi’an 710054China Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region Ministry of EducationXi’an 710054China Key Laboratory for Geo-hazards in Loess Area Ministry of Natural ResourcesXi’an 710054China field base of scientific observation of Shaanxi tongguan Ministry of Natural ResourcesXi’an 710054China Dalian ocean and fishery comprehensive administration supervision lochus Dalian 116000China Assiut Branch Al-Azhar UniversityAssiut 71524Egypt

This study aims to investigate the mechanisms and health risks of fluoride enrichment in groundwater in the Loess Plateau,*** taking Dali County,Shaanxi Province,China as an example,this study obtains the following results through field investigation and the analyses of water,soil,and crop samples.(1)The groundwater can be divided into two major types,namely the Quaternary pore-fissure water and Karst *** Karst area and sandy area have high-quality groundwater and serve as the target areas for optional water *** groundwater in the study area is slightly alkaline and highly ***,high-fluoride groundwater is mainly distributed in the loess and river alluvial plains in the depression area of the Guanzhong Basin and the discharge areas of the groundwater,with the highest fluoride concentration exceeding seven times the national standard.(2)Fluoride in groundwater mainly originates from a natural source and human *** natural source refers to the fluoride-bearing minerals in rocks and soil,and the fluoride from this source is mainly controlled by natural factors such as climate,geologic setting,pH,specific hydrochemical environment,ion exchange,and mineral *** activities in modern life can be further divided into industrial and agricultural sources primarily.(3)The health risks of fluoride contamination are very high in the Loess Plateau,especially for children compared to ***,the risks of fluoride exposure through food intake are higher than those through drinking water *** authors suggest selecting target areas to improve water supply and ensure the safety of drinking water in the study ***,it is necessary to plant crops with low fluoride content or cash crops and to conduct groundwater treatment to reduce the fluoride concentration in drinking *** results will provide a theoretical basis for safe water supply in the faulted basin areas in the Loess Plateau.

关键词： Fluoride Groundwater Human health risks Loess Plateau Hydrogeological survey engineering Dali County Shaanxi Province China

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Migration and speciation transformation mechanisms of mercury in undercurrent zones of the tongguan gold mining area, Shaanxi Loess Plateau and impact on the environment

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China Geology 2021年第2期4卷 311-328页

作者： Rui-ping Liu You-ning Xu Hui-chao Rui El-Wardany RM Ying Dong Xi’an Center of China Geological Survey Ministry of Natural ResourcesXi’an 710054China Key Laboratory of Subsurface Hydrology and Ecological Effects in Arid Region Ministry of EducationXi’an 710054China Key Laboratory for Geo-hazards in Loess Area Ministry of Natural ResourcesXi’an 710054China field base of scientific observation of Shaanxi tongguan Ministry of Natural ResourcesXi’an 710054China School of Earth Science and Land Resources Chang’an UniversityXi’an 710054China Al-Azhar University Assiut Branch 71524Egypt

In order to study the migration and transformation mechanism of Hg content and occurrence form in subsurface flow zone of gold mining area in Loess Plateau and its influence on water environment,the field in-situ infiltration test and laboratory test were carried out in three typical sections of river-side loess,alluvial and proluvial strata in tongguan gold mining area of Shaanxi Province,and the following results were obtained:(1)The source of Hg in subsurface flow zone is mainly caused by mineral processing activities;(2)the subsurface flow zone in the study area is in alkaline environment,and the residual state,iron and manganese oxidation state,strong organic state and humic acid state of mercury in loess are equally divided in dry and oxidizing environment;mercury in river alluvial or diluvial strata is mainly concentrated in silt,tailings and clayey silt soil layer,and mercury has certain stability,and the form of mercury in loess is easier to transform than the other two media;(3)under the flooding condition,most of mercury is trapped in the silt layer in the undercurrent zone where the sand and silt layers alternate with each other and the river water and groundwater are disjointed,and the migration capacity of mercury is far less than that of loess layer and alluvial layer with close hydraulic connection;(4)infiltration at the flood level accelerates the migration of pollutants to the ground;(5)the soil in the undercurrent zone is overloaded and has seriously exceeded the *** the groundwater monitoring results are safe this time,relevant enterprises or departments should continue to pay attention to improving the gold extraction process,especially vigorously rectify the small workshops for illegal gold extraction and the substandard discharge of the three wastes,and intensify efforts to solve the geological environmental problems of mines left over from *** present,the occurrence form of mercury in the undercurrent zone is relatively s

关键词： Mercury speciation Hyporheic zones Constant surface water level Flood level Surface-groundwater Hydraulic connection tongguan gold mining areas Loess Plateau shannxi Province

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Microplastic contamination in lacustrine sediments in the Qinghai-Tibet Plateau:Current status and transfer mechanisms

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China Geology 2022年第3期5卷 421-428页

作者： Rui-ping Liu Fei Liu Ying Dong Jian-gang Jiao El-Wardany RM Li-feng Zhu Xi’an center China Geological SurveyMinistry of Natural ResourcesXi’an 710054China Shaanxi Province Water Resources and Environment Engineering Technology Research Center Xi’an 710054China Western Green Development Research Institute China Geological SurveyXi’an 710054China Key Laboratory for Geo-hazards in Loess Area Ministry of Natural ResourcesXi’an 710054China field base of scientific observation of Shaanxi tongguan Ministry of Natural ResourcesXi’an 710054China Dalian Ocean and Fishery Comprehensive Administration Supervision Lochus Dalian 116000China Key Laboratory of Western China’s Mineral Resource and Geological Engineering Ministry of EducationXi’an 710054China School of Earth Science and Land Resources of Chang’an University Xi’an 710054China Assiut Branch Al-Azhar UniversityAssiut 71524Egypt

This paper aims to investigate the present situation and transfer mechanisms of microplastics in lacustrine sediments in the Qinghai-Tibet *** study surveyed the average abundance of microplastics in *** abundance of microplastics in sediments of lakes from the Qinghai-Tibet Plateau is 17.22-2643.65 items/kg DW and 0-60.63 items/kg DW based on the data of the Qinghai Lake and the Siying Co *** microplastic abundance in sediments from small and medium lakes is very high compared to that in other areas in the *** microplastics in other lakes of the world,those in the lakes in the Qinghai-Tibet Plateau mainly include organic polymers PA,PET,PE,and PP and are primarily in the shape of fibers and *** microplastic pollution of lacustrine sediments in the Qinghai-Tibet Plateau is affected by natural changes and by human activities,and the concentration of microplastics in lacustrine ecosystems gradually increases through food ***,the paper suggests the relevant administrative departments of the Qinghai-Tibet Plateau strengthen waste management while developing tourism and pay much attention to the impacts of microplastics in water *** study provides a reference for preventing and controlling microplastic contamination in the Qinghai-Tibet Plateau.

关键词： Microplastic pollution Environmental pollution Lake Lacustrine sediment Qinghai Lake Ecological risks Hydrogeological engineering Ecological engineering Qinghai-Tibet Plateau China

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