Survey and Evaluation of Heavy Metal Contamination of Soils in Tianjin

The soil was sampled in a vegetable planting base near suburbs of Tianjin City. The levels of Cd, Cr, Cu, Pb, Zn, Hg and Se in soil sample were determined by atomic adsorption spectral photometry. Based on soil environment quality standard, the classification and assessment of single factor and multifactor were done. Results showed that other heavy metals contents were in safe level except Cd, which indicated that the soil in this region is suitable for vegetable planting.