Study On Pollution Characteristics And Health Risk Of Heavy Metals In Nanchang Section Of The Fuhe River

As the emergency spare water source in Changnan urban area,Nanchang City,the water quality and the water quality of local residents are closely related to the production and life.This paper is based on the heavy metals in the water body（surface water and groundwater）in Fuhe Nanchang section,and the main conclusions of the temperature and space distribution characteristics,water pollution status,possible pollution source and human health are studied,respectively Have:（1）Heavy metal V,Fe,Mn is the main contribution element of water quality pollution in this basin.Substallocarbon Ba,Fe,Mn,Sr,V,and Cd spatial distribution characteristics are substantially consistent in different water trends in different water,specifically in the middle and lower reaches of upstream;heavy metals Zn,As,Cr space distribution law exhibits a larger water term difference.Heavy metal Ba in groundwater,Mn spatial distribution characteristics similar to different water periods,that is,the middle upstream is higher than the downstream;the spatial distribution characteristics of heavy metal Fe,Sr,V,Zn,and Cr have a significant seasonal difference in different wateriod periods.（2）The content of the same heavy metal in surface water changes obviously at the same sampling point in different hydrological periods,with the coefficient of variation ranging from 6.64%to 173.21%,and the specific time distribution characteristics are as follows:Ba,dry season>wet season>normal season;Fe,Zn,normal season>wet season>l dry season;Mn,wet season>dry season>normal season;Sr,v,dry season>normal season>wet season;Cr,wet season>dry season,As,normal season>dry season;Cd was detected only in dry season.The content of heavy metals in groundwater also changes obviously in different hydrological periods,and the coefficient of variation ranges from 3.88%to 173.21%.The specific time distribution characteristics are:Ba and V,dry season>normal season>wet season;Fe、Zn;wet season>dry season>normal season;Mn、Sr,wet season>normal season>dry season;Cr:wet season>dry season.The results of water quality evaluation show that the pollution degree of heavy metals to water body is the highest in dry season.（3）Correlation,main components and cluster analysis showed that there may be different pollution sources in the same heavy metal in different water intake water.There are a variety of different sources of high metal contamination in this basin:heavy metals Fe,Mn,mainly derived from agricultural activity pollution sources and rock mineral dissolution pollution sources;heavy metal Ba,Sr,V,mainly derived from environmental sewage discharge pollution source and farming Pollutants;heavy metals Zn,Cr,Cd and AS come from synergistic pollution from transportation,industrial activities,soil bottom mud;the heavy metal moieties in groundwater are derived from surrounding rock minerals containing Ca²⁺,K⁺,Mg²⁺.（4）Some water bodies have a maximum risk level recommended by the human body higher than the health of the human body than the US Environmental Protection Bureau（USEPA）and other institutions(1.0×10^-4a^-1),with specific propals:25.81%（surface water+dry season）62.16%（surface water+wet season）,36.36%（groundwater+dry season）and 72.72%（groundwater+wet season）;the risk level of the human body to the human body is about 1～3 quantities;non-cancer heavy metals V,Mn,and Fe is the main element of water pollution,but the degree of health hazards in the human body is much lower than that of carcinogenic metal Cr,Cd,As,and the risk level is generally 3～7Quantity;in the assessment of human drinking water health and safety issues,you should focus on the level of cancer heavy metals in water.