|Table of Contents|

Characteristics and Risk Assessment of Heavy Meatal Cd Pollution of Shallow Groundwater and Surface Water in Main Stream of Weihe River, China(PDF)

《地球科学与环境学报》[ISSN:1672-6561/CN:61-1423/P]

Issue:
2020年第02期
Page:
267-277
Research Field:
水资源与环境
Publishing date:

Info

Title:
Characteristics and Risk Assessment of Heavy Meatal Cd Pollution of Shallow Groundwater and Surface Water in Main Stream of Weihe River, China
Author(s):
ZHAO Yu12
(1. College of Environment and Life Sciences, Weinan Normal University, Weinan 714099, Shaanxi, China; 2. Key Laboratory for Ecology and Environment of River Wetlands in Shaanxi Province, Weinan 714099, Shaanxi, China)
Keywords:
Cd heavy metal groundwater surface water spatial distribution pollution level health risk Weihe river
PACS:
P641; X52
DOI:
10.19814/j.jese.2019.10046
Abstract:
In order to understand the current status of heavy metal pollution and health risk of water in Weihe river, the samples of shallow groundwater and surface water were collected, and the single factor index and USEPA health risk assessment model were used to reveal the current status and health risk of heavy metal Cd pollution of water in main stream of Weihe river. The results show that Cd concentrations of groundwater and surface water in main stream of Weihe river in 2018 are 426.40-1 104.27 ng·L-1 and 224.70-1 154.12 ng·L-1, respectively; according to Standard for Groundwater Quality (GB/T 14848—2017)and Environmental Quality Standards for Surface Water (GB 3838—2002), the Cd concentrations of groundwater and surface water are within the limits of classes Ⅰ-Ⅲ; the Cd concentrations show obvious spatial differentiation, and a gradual increase along the river flow direction; the high value areas of Cd concentrations in groundwater are consistent with that in surface water, which are Xingping city and Linwei district of Weinan city, Shaanxi province; according to the evaluation results of Cd concentrations based on single factor index, the Cd pollution is close to the clean level; along the river flow direction, the single factor index of Cd pollution in the middle and lower part of Weihe river is much higher than that in the upper part of Weihe river; the carcinogenic risk values of heavy metal Cd to adults and children are(1.48-2.05)×10-4 and(1.84-2.55)×10-4, respectively, so that Cd in water maybe have health risk for human.

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Last Update: 2020-03-24