施灰田土壤及所产蔬菜铀、钍和钾、钼、镁、锌含量变化及影响评价

CONTENTS VARIATION AND INFLUENCE APPRAISAL OF U,Th,K,Fe,Mo,Mg AND Zn OF FLY ASH SOIL AND VEGETABLES

U和Th是放射性元素,K、Fe、Mo、Mg和Zn是植物生长需要的必要营养元素。粉煤灰中U、Th、Fe和Mo的含量略高于空白土壤中Fe和Mo的含量,K、Mg和Zn的含量低于空白土壤中K、Mg和Zn的含量。掺施粉煤灰并没有引起施灰土壤及所产蔬菜中各元素含量的明显变化。与国家土壤环境质量标准及食品、卫生标准的限值相比,施灰土壤及所产蔬菜的U、Th、K、Fe、Mo、Mg和Zn的含量均在正常范围内波动。

U and Th are radioactive elements. K, Fe, Mo, Mg and Zn are nutritive elements which are necessary to plants growth. The contents of U, Th, Fe and Mo in fly ash are somewhat higher than those in contrast soil, while the contents of K, Mg and Zn in fly ash are slightly lower than those in contrast soil.The contents of U, Th, K, Fe, Mo, Mg and Zn in the fly ash soil and vegetables don't vary obviously.The contents of five elements in the fly ash soil and vegetables vary in the limited value of the state standards about the soil and vegetables.