“宝钢”地区环境(土壤、作物)基底研究

本文探讨宝钢周围地区土壤、作物重金属和氟的基底浓度.在调查地区进行土壤和作物的采样和实测,表明该地区除了靠近吴淞工业区地段外,未受广泛而严重的重金属和氟污染.局部地区氟污染已危害作物和牲畜.土壤上下层锌镉比和土壤、作物锌镉比表明锌比镉更易在谷物中积累;镉只是残留在土壤表层,而锌则趋向于在土壤剖面中均匀分布. 运用对数距离与对数金属浓度回归分析,表明该地区农业土壤的重金属污染主要呈东南到西北方向,污染源来自吴淞工业区.

The Base Line Levels of Heavy Metals and Fluorine in the Soils and Crops near Baoshan Steel and Iron Complex

The purpose of this research was to determine the base line levels of heavy metals and fluorine in soils and crops near Baoshan Steel and Iron Complex, which was under construction. Soil and grain samplings were conducted in predetermined region to find out if airborne heavy metal particulates and fluorine from the Wusong industrial area,situated on the southeastern side of the region, were contaminating soils and crops.Sampling in the region revealed no widespread serious metal contamination.Some metal and fluorine contamination had occured on agricultural soils near Wusong industrial area.Wheat leaf contamination of F had posed hazard to animals and crops.A comparison of Zn/Cd ratio in soils, and in soil and crop, suggested that Zn was more actively (than Cd) accumulated in the grain, and that Cd was retained in the top soil while Zn tended to be more evenly distributed throughout the soil profile. The use of log distance vs.log metal concentration in regression analysis showed that the metal contamination of agricultural soil was mainly in a northwesterly direction from the Wusong industrial area.