北京市微量元素水溶肥料重金属含量分析

Analysis and Evaluation of Trace Element Water Soluble Fertilizer in Beijing

通过对北京市2011—2021年微量元素水溶肥料的监测,分析北京市微量元素水溶肥料重金属含量和污染情况。结果表明,北京市微量元素水溶肥产品仍存在重金属含量超标问题。5个重金属元素的合格率均在90%以上,As和Cd的合格率最低,超标量最高;2015年和2017年的As和Cd元素P;值超过1,达到了重污染程度。2011—2021年内梅罗综合污染指数P;分别是0.527、0.37、0.57、0.278、38.514、0.337、18.553、0.264、0.432、0.338、0.533,这说明自2017年之后重金属污染情况逐年趋于良好。

Through the monitoring of trace element water soluble fertilizers in Beijing from 2011 to 2021,the content and pollution of heavy metals in trace element water soluble fertilizers in Beijing were analyzed.The results show that the content of heavy metals in water soluble fertilizer products of trace elements in Beijing still exceeds the standard.The qualified rates of the five heavy metal elements are more than 90%,the qualified rates of as and CD are the lowest,and the superscalar is the highest.In 2015 and 2017,the PI values of as and CD elements exceeded 1,reaching the level of heavy pollution.From 2011 to 2021,Nemero’s comprehensive pollution index P was 0.527,0.37,0.57,0.278,38.514,0.337,18.553,0.264,0.432,0.338 and 0.533 respectively,indicating that the heavy metal pollution has tended to be good year by year since 2017.