Research on Magnesium Pollution Status and Remediation of Tilth Soils in Haicheng Magnesium Mine

shanmj@126.com *Corresponding author Keywords: Magnesium pollution, Quality evaluation, Soil remediation Abstract. This paper describes the magnesium pollution status and remediation of tilth top soils in Haicheng magnesium mine. The soil quality status was evaluated based on the analysis results. Physiologically acid fertilizers and organic fertilizer were used for the remediation of contaminated soil using magnesium-ammonium-phosphate coprecipitation method. The resultes showed that total magnesium content was high in Haicheng magnesium mine. Single factor pollution index was adopted to evaluate magnesium content in tilth top soils. For all the soil samples, there were no unpolluted (P 3) samples accounted for 62.5%. The application of calcium superphosphate and ammonium sulfate decreased the concentration of water soluble magnesium in the soil effectively and achieved significant remediation effectiveness. The influence of ammonium sulfate and calcium superphosphate reached very significant level and significant level respectively, while the influence of organic fertilizer was not significant.