Pollution change and health risk assessment of cadmium in farmland soil in Shijiazhuang from 2016 to 2022
Objective This study aims to clarify the situation of cadmium pollution in the agricultural soil of Shijiazhuang City from 2016-2022,evaluate potential health risks to the population,and assess the effectiveness of"the three-year initiative"in reducing cadmium pollution.Methods In six selected project counties,20 soil samples were collected annually from each county.Samples were collected from monitoring points in each county annually between July-August.Cadmium levels in the soil were evaluated using standard limits.Additionally,the study used the geo-accumulation index method,and potential ecological risk index method to assess the situation.Results A total of 840 soil samples were collected.In 2016 and 2017,cadmium levels were relatively high,primarily concentrated in Zhengding County and Zanhuang County.After"the three-year initiative",there was a decrease in the average cadmium pollution level in Shijiazhuang City.Specifically,and cadmium levels decreased in Zhengding County,Zanhuang County,Luancheng County,Gaocheng County,and Luquan County after implementation.However,Wuji County saw a slight increase in cadmium levels.Conclusions The level of cadmium pollution in agricultural soil in Shijiazhuang City significantly decreased after the implementa-tion of"the three-year initiative".This indicates that"the three-year initiative"had a certain effect in reducing soil cadmium risk.However,there is still a need to strengthen the investigation and monitoring of cadmium pollution in the soil to formulate timely policies to address potential risks.
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