Details

Autor(en) / Beteiligte

• Zhai, Yuanzheng
• Zheng, Fuxin
• Zhao, Xiaobing
• Xia, Xuelian
• Teng, Yanguo

Titel

Identification of hydrochemical genesis and screening of typical groundwater pollutants impacting human health: A case study in Northeast China

Ist Teil von

• Environmental pollution (1987), 2019-09, Vol.252 (Pt B), p.1202-1215

Ort / Verlag

England: Elsevier Ltd

Erscheinungsjahr

2019

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Concentrations of common pollutants in groundwater continue to increase, and emerging pollutants are also increasingly found worldwide, thereby increasingly impacting human activities. In this new situation, it is necessary, albeit more difficult, to once again recognize the hydrochemical genesis of groundwater and to subsequently screen the typical pollutants. Taking the groundwater of the Songnen Plain of Northeast China as an example, the hydrochemical genesis was identified using space interpolation, characteristic element ratio and factor analysis methods based on 368 groundwater samples. Subsequently, the typical pollutants with potential impacts on the health of the local residents were screened by the index system method newly established. All the measured hydrochemical compositions show an obvious spatial variation, with a uniform hydrochemical type of HCO3–Ca in the whole area. Both the major compositions (K, Na, Ca, Mg, HCO3, Cl and SO4) and trace compositions (Fe, Mn, Cu, Zn, Pb, As, F, I and Se) are mainly protogenetic in an environment impacted by the lixiviation of groundwater in the migration process in the strata, although these compositions have been impacted by human activities to varying degrees. The mass concentration of NO3–N has exceeded most of the major compositions except for HCO3 and Ca, which means the nitrogen pollution problem is already very serious; and this problem is mainly caused by the utilization of fertilizers and the discharge of industrial wastewater and domestic sewage. Human activities have obviously disrupted the natural dynamic balance of these chemicals between the environment and the groundwater, thereby intensifying the release of F, Fe and Mn from the environment. TDS, total hardness, tri-nitrogen, F, Fe, Mn, Pb and As in some parts are found to exceed the standards of groundwater quality to varying degrees. As, Pb, Fe, NO3–N, NO2–N, Mn, F and NH4–N are finally screened as the typical pollutants. [Display omitted] •Three methods were used to determine hydrochemical genesis and typical pollutants.•A index system model for screening typical groundwater pollutants was constructed.•The influencing factors of hydrochemical genesis were analyzed.•The groundwater pollution situation was compared horizontally and vertically.•Reliable suggestions were provided for regional groundwater management. This work identified the hydrochemical genesis and screened the typical pollutants in Songnen Plain groundwater.