The presence of high concentrations geogenic arsenic (As) in groundwater poses a serious threat to the health millions individuals globally. This paper examines research progress with As through comprehensive literature review and analysis, covering distribution, risks, situ remediation, regulatory technologies, development trends, establish reference for future research. global distribution high-As is mainly inland basins river deltas countries South Asia, East America. High-As risk areas...

High concentrations of nitrate in groundwater pose a threat to human health.To quantify pollution China's Lianhuashan District and evaluate its health risks, 73 samples were collected analyzed.Results showed that the spatial distribution chemical components was varied order TDS>HCO 3 >Ca>Cl>SO 4 > Na>Mg>NO >K>NH >NO 2 .NO ranged from 0.02-340.49mg/L averaged 70.38 mg/L.Over 28.76% exceeded QSCB Class III threshold (20 mg / L N). Principal component analysis determined NO contamination...

Due to the impact of human agricultural production and climate environmental changes, applicability groundwater for drinking purposes has attracted widespread attention.In order quantify hydrochemical characteristics in Lianhuashan evaluate its suitability assessing water purposes, 71 samples were collected analyzed.The results show that aquifers study area is weakly alkaline.The abundance HCO 3 ->Cl ->SO 4 2-for anions, Ca 2+ >Na + >Mg cations.Groundwater chemical types dominated by -Ca,...

In order to study the pollution, ecological risk and health of heavy metals elements in surface farmland cold black soil area Northeast China, main grain production based on collection analysis samples 2010 2021, element this were assessed by using method Geo accumulation index (Igeo), potential hazard (RI) assessment (HRA) model.The results show that there are pollution soil, which is accumulated year year.The average contents Hg, Cd, Cr, Ni, Pb, Zn, As Cu higher than background values...

As a plant kingdom and biodiversity hotspot, Yunnan is key region for our understanding of modern past global changes in environment. proxies vegetation climate, phytoliths have become increasingly important ecological paleoecological studies. In this study, phytolith analysis was carried out on samples surface sediments from 70 lakes western Yunnan, southwest China. These are surrounded by types including broadleaved coniferous forests, scrubs, grasslands, meadows, alpine vegetation. The...

In order to investigate the health risks of NO3- in rural drinking groundwater Suihua, China and provide a basis for healthy water, 40 sets samples were collected Suihua area, average concentration nitrate study area was 71.66 mg/L, statistical analysis software (SPSS19), Hydrogeochemical Analysis Software (AqQA) pollution used. Through water sample collection, chemical construction human risk model (HHRA), qualitative quantitative assessment carried out people different ages sexes, it...

Due to the impact of human agricultural production, climate and environmental changes.The applicability groundwater for drinking purposes has attracted widespread attention.In order quantify hydrochemical characteristics in Hailun evaluate its suitability assessing water purposes, 77 shallow samples 57 deep were collected analyzed.The results show that aquifers study area is weakly alkaline, while acidic.The abundance HCO 3 -> Cl SO 4 2-for anions, Ca 2+ > Na + Mg cations.Groundwater...

In order to understand the status of soil heavy metal pollution and its impact on human health, degree in changchun new Area associated ecological risk health were evaluated using geo-accumulation index method, potential assessment model.the results showed that average contents eight metals higher than their background values city, with different degrees accumulation.the Hg cd pollution, risks.The was 0.43, reflecting light medium ranged from 42 806, moderate strong risk.The level Cd found...

People living in the rural areas of Suihua City rely mainly on groundwater. Determining chemical characteristics groundwater and its impact human health is very important to support drinking water safety engineering. We conducted a systematic study chemistry by using software such as SPSS, SQLEVAL, MapGIS, other methods statistical analysis, correlation Shukarev Piper’s trilinear plot scale factor N.L. Nemerow index analysis. It concluded that cation calcium type, anion mixed type chloride,...

Abstract In order to identify and effectively control the impact of NO3− pollution on human health, basis investigation, sampling, analysis testing, statistical software (SPSS19), groundwater software, Nemera comprehensive index method, correlation method health risk assessment model are applied for research. The results indicate that in study area is mainly Class II water, with overall good water quality. main influencing factors producing IV NO3−, Fe, F− SO42−. use agricultural fertilizers...

Long-term regional vegetation dynamics is essential for the understanding of past land cover changes. High-resolution pollen analysis a 1020 cm core from large lake, Lake Yangzonghai (YZH), in central Yunnan, SW China, was conducted to reveal lake catchment over 13,400 years. Pollen record, principal component (PCA) percentages major arboreal taxa, and plant abundances estimated “Regional Estimates VEgetation Abundance Large Sites” (REVEALS) model show five successional stages since cal. BP:...

Vegetation dynamics data since the Last Glacial Maximum (LGM) are essential for our understanding of ecosystem shifts and vegetation responses to climate change. Here, we present a pollen record covering last 25,000 years from Lake Fuxian in central Yunnan, southwest China. Our study shows seven stages LGM: The early LGM (stage 7 25,000–21,200 cal. BP) witnessed less dense regional dominated by pine forests, evergreen broadleaved forests (EBFs), deciduous (DBFs), montane hemlock fir/spruce...

In order to gain an in-depth understanding of the geothermal geological characteristics and heat-forming conditions in Tangyuan fault-depression area, this paper has carried out a series detailed works, including surveys geophysical explorations. Through these combined with results systematic drilling, sampling tests, dynamic monitoring, we have studied, analyzed, compared relevant data achieve comprehensive area. During research process, preliminarily determined stratigraphic structure area...

In order to understand the status of soil heavy metals and risk element pollution its impact on human health, Datong area Shanxi Province was selected as study area.Using spss19 statistical software, degree pollution, ecological health were evaluated by using land accumulation index method, potential hazard method assessment model.The results showed that there different degrees Pb, Cr, Zn, Cd, Ni, As, Hg Cu in farmland area.The Pb most serious.There 8 light points, 3 medium 1 heavy~extremely...

Vegetation and fire archives of the late Holocene are essential for understanding importance natural anthropogenic forcings on past future vegetation successions as well climate changes. Here we present a 1640-year record history Lake Haixihai catchment in northwestern Yunnan, southwest China. Pollen charcoal analyses XRF (X-ray fluorescence) analysis lacustrine sediments from were employed to reveal its regional vegetation, forest fire, soil erosion intensity changes over last 1640 years....

The present study was conducted to investigate trace metal (Fe, Mn, Cd, Pb, Zn, Cu, Al, As, Se, Hg, Sr, Ba, Li, Co, B, Ni, Ag, Mo and Cr) concentrations of drinking water samples in Lianhuashan District, China. Furthermore, the aimed ascertain carcinogenic non-carcinogenic health risks metals by ingestion dermal absorption pathways local residents. Metal were compared with permissible limits set Chinese Standards, USEPA WHO. average analyzed elements are order Fe > Sr Mn Al Ba Zn B Li Pb Cr...

Abstract Nitrate pollution in groundwater is a global environmental problem that poses risks to human health. We investigate the health of nitrate rural drinking Rucun Township and surrounding areas Wutai County, provide basis for healthy water. By using statistical analysis software (SPSS19) hydrogeochemical (AqQA), qualitative quantitative evaluation was conducted among populations different ages genders through water sample collection, chemical analysis, construction risk model (HHRA)....

Abstract In order to quantify the hydrochemical characteristics of groundwater in Hailun, analyze process, and evaluate its health risks associated with nitrate intake, 77 shallow samples were collected analyzed. The results show that study area is weakly acidic chemical type was dominated by HCO3-Ca, HCO3•Cl-Ca, HCO3-Ca•Na HCO3•Cl-Ca•Na. Rock weathering dissolution, ion exchange, human activities are main reasons affecting composition Hailun. dissolution process silicate under alkaline...

Due to the impact of human agricultural production and climate environmental changes, applicability groundwater for drinking purposes has attracted widespread attention. In order quantify hydrochemical characteristics in Changchun New District evaluate its quality purposes, 53 shallow samples were collected analyzed. The results show that aquifers study area is weakly alkaline. abundance Ca2+ > Na+ Mg2+ cations, HCO3− Cl− SO42− anions. Ca-HCO3•Cl water type dominated area, constituting about...

To understand the status of soil heavy metal pollution and its impact on human health, Rucun area Wutai County, Xinzhou City, Shanxi Province, was selected as research area.Using SPSS19 statistical software, land accumulation index method, potential ecological hazard health risk assessment model were used to evaluate degree pollution, risk, in area.The results indicate that study is relatively low, there are light points for As Pb; The low; As, Cr, Pb elements pose a significant non...