Hazard of heavy metal pollution in farmland soil and its ecological risk assessment method

Abstract

The farmland soil heavy metal pollution, not only has a great harm to the crops, and also caused great influence to human life and health. False degree is high, due to the evaluation of traditional ecological assessment method for reliability is poor, so it is necessary to strengthen the farmland soil heavy metal pollution risk assessment method research. This study analyzes the harm of soil heavy metal pollution, and will affect soil environmental toxicity of heavy metal element coefficient to join in the form of weighting ecological assessment, combining with the degree of heavy metal pollution index, potential ecological harm index calculation, and then formulated and pollution level classification standards and the potential ecological harm level compared with complete ecological assessment.